JD

"Jonny Durango"

20/04/2004 9:24 PM

Russian or Baltic Birch Plywood?

I am building a pair of studio reference speakers, and the *very* tight
specs call for Baltic birch plywood cabinets. I accidentally bought Russian
birch ply. I've read in here before that they are the same thing, but the
names would tend to imply otherwise. Can one of the many plywood experts
clarify? Thanks!

--

Jonny Durango

http://www.soundclick.com/ratcitymusic.htm

"Of course the people don't want war. But after all, it's the leaders of the
country who determine the policy, and it's always a simple matter to drag
the people along whether it's a democracy, a fascist dictatorship, or a
parliament, or a communist dictatorship. Voice or no voice, the people can
always be brought to the bidding of the leaders. That is easy. All you have
to do is tell them they are being attacked, and denounce the pacifists for
lack of patriotism, and exposing the country to greater danger."
-- Herman Goering, Hitler's Reich-Marshall, at the Nuremberg trials after
WWII.




This topic has 32 replies

JD

"Jonny Durango"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 12:35 AM

> All of the Russian plywood I've seen in Seattle has fewer plies than the
> little bit of Baltic birch I've seen. Is that common? The Russian
plywood
> seems to be less dense, also.

well this stuff measures 1/2" and has 9 plies....it looks very solid with
very few fillings and machines beautifully! It cae in 5' x 5' stock and was
purchased from crosscut hardwoods

--

Jonny Durango

http://www.soundclick.com/ratcitymusic.htm

"Of course the people don't want war. But after all, it's the leaders of the
country who determine the policy, and it's always a simple matter to drag
the people along whether it's a democracy, a fascist dictatorship, or a
parliament, or a communist dictatorship. Voice or no voice, the people can
always be brought to the bidding of the leaders. That is easy. All you have
to do is tell them they are being attacked, and denounce the pacifists for
lack of patriotism, and exposing the country to greater danger."
-- Herman Goering, Hitler's Reich-Marshall, at the Nuremberg trials after
WWII.



"Hitch" <[email protected]> wrote in message
news:[email protected]...
> > It's the glue.
> >
> > Russian birch is usually made with interior glue.
> >
> > Finnish birch (Baltic) uses exterior glue.
> >
>
> All of the Russian plywood I've seen in Seattle has fewer plies than the
> little bit of Baltic birch I've seen. Is that common? The Russian
plywood
> seems to be less dense, also.
>
>
> --
> John Snow
> "If I knew what I was doing, I wouldn't be here"

BR

"Bernard Randall"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

20/04/2004 11:35 PM


"Jonny Durango" <[email protected]> wrote in message
news:bIkhc.181005$JO3.104305@attbi_s04...
> > As far as speaker cabinets are concerned, why not use MDF?
>
> I'm building cabinets for a pair of LS3/5A reference monitors which were
> built to very strict specs under liscense of the BBC. These were some of
the
> most critically designed speakers of their time and even small variations
in
> construction/material will make a difference. To quote from the website
> www.ls35a.com:
>
> "The cabinet walls are made from 12mm (0.5 inch) selected birch plywood
with
> internal fillets from beech. Because of the critical nature of the design
it
> was found that the substitution of other wood for the walls or fillets
> caused clearly audible changes. The use of any hardwood for the beech
> fillets produced a audible colouration caused by the resonance of the B110
> on its chassis."
>
> Thanks for the clarification about the plywood!
>
> --
>
> Jonny Durango
>
I had a pair of these, if I recall they were Spendors, great speakers.

Bernard R

mm

"mp"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 9:11 AM

> But cheap MDF makes a better speaker cabinet.

It makes a good cheap speaker cabinet, which is great for the DIY'er, but
MDF does not necessarily a make better cabinet. Most high-end speaker
systems do not use MDF as a cabinet material as it's acoustic properties can
be bettered by other materials.

mm

"mp"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 9:13 PM

> >Most high-end speaker
> >systems do not use MDF as a cabinet material as it's acoustic properties
can
> >be bettered by other materials.
>
> Like what ?

Solid wood (well seasoned) or high quality plywood.

> For rational materials though, MDF is pretty hard to beat. It's crummy
> shelf-building properties actually work to its advantage for speaker
> cabs.

MDF is pretty good, it's resonance properties are predictable, and it's easy
to work with, but many designers feel it sounds dull compared other choices.
A lot depends on the driver choices, but I'd never build a bottom octave
subwoofer out of MDF, for instance. Same with open baffle systems.

mm

"mp"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 2:41 PM

> Then there's "sonic differences" between tube amps and solid-state,
> blah blah....

If you can't hear the difference between tube and solid amps on a decent
quality system then you have a tin ear.

mm

"mp"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 2:45 PM

> now this is VERY audible. Anyone who plays electric guitar (and I do) can
> attest to this. I'm fairly certain that I could pass an intense "blind amp
> test" and pick out every single solid state and every single tube, and my
> ears aren't even that good.

Guitar amps have more of a sonic signature than stereo amps, which ideally
should be sonically transparent, but typically most people can differentiate
between solid state and tube amps. I know I can, probably even with earplugs
on and my head under water.

mm

"mp"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 7:25 PM

> >MDF is pretty good, it's resonance properties are predictable, and it's
easy
> >to work with, but many designers feel it sounds dull compared other
choices.
>
> Resonance ? What are we making here, loudspeakers or violins ?

I can honestly say I've never seen any MDF violins.

mm

"mp"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

23/04/2004 11:21 AM

> |If you can't hear the difference between tube and solid amps on a decent
> |quality system then you have a tin ear.
>
> Ah, but I speak of those to whom a tube amp sounds "better." In other
> words, distortion is good. [g]

"Better" is sometimes difficult to quantify. Ultralow distortion specs don't
necessarily correlate with better sound, and part of the appeal of tube amps
is their second and third order harmonic distortions. I don't have any tube
equipment myself, but I do find their sound quite seductive and engaging at
times and I can understand why some would prefer them.

LH

"Lew Hodgett"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 1:47 AM


"Jonny Durango" writes:
> I am building a pair of studio reference speakers, and the *very* tight
> specs call for Baltic birch plywood cabinets. I accidentally bought
Russian
> birch ply. I've read in here before that they are the same thing, but the
> names would tend to imply otherwise. Can one of the many plywood experts
> clarify?

It's the glue.

Russian birch is usually made with interior glue.

Finnish birch (Baltic) uses exterior glue.

If you ever try to laser cut a piece of Russian, it will be a problem.

HTH

As far as speaker cabinets are concerned, why not use MDF?


--
Lew

S/A: Challenge, The Bullet Proof Boat, (Under Construction in the Southland)
Visit: <http://home.earthlink.net/~lewhodgett> for Pictures

AD

Andy Dingley

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 12:08 AM

On Wed, 21 Apr 2004 02:08:07 GMT, "Jonny Durango"
<[email protected]> wrote:

>The use of any hardwood for the beech
>fillets produced a audible colouration caused by the resonance of the B110
>on its chassis."

Cargo cult bullshit (in a hi-fi product ? how unusual !)

You can't claim to tell the difference between beech and oak corner
fillets on one hand, then not specify the grade of ply on the other.
Use poor (or thin) ply and you _will_ tell the difference.

--
Smert' spamionam

RR

RB

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 9:27 AM

My understanding of this is that the standard is, or was, Finnish Birch
originally made in Finland. As their manufacturing equipment was
upgraded and replace the lesser performing machinery was sold to the
baltic states and baltic birch started to appear.

I've bought some that was superb, a have a pallet of Baltic birch now
that is delaminating so badly that I'll probably return it. The problem
is that it carries the same manufacturing markings in cyrillic
characters so I believe that my supplier, GP, got it from the same place.

RB

Jonny Durango wrote:
> I am building a pair of studio reference speakers, and the *very* tight
> specs call for Baltic birch plywood cabinets. I accidentally bought Russian
> birch ply. I've read in here before that they are the same thing, but the
> names would tend to imply otherwise. Can one of the many plywood experts
> clarify? Thanks!
>
> --
>
> Jonny Durango
>
> http://www.soundclick.com/ratcitymusic.htm
>
> "Of course the people don't want war. But after all, it's the leaders of the
> country who determine the policy, and it's always a simple matter to drag
> the people along whether it's a democracy, a fascist dictatorship, or a
> parliament, or a communist dictatorship. Voice or no voice, the people can
> always be brought to the bidding of the leaders. That is easy. All you have
> to do is tell them they are being attacked, and denounce the pacifists for
> lack of patriotism, and exposing the country to greater danger."
> -- Herman Goering, Hitler's Reich-Marshall, at the Nuremberg trials after
> WWII.
>
>
>
>

AD

Andy Dingley

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 9:20 PM

On Thu, 22 Apr 2004 09:06:19 -0700, Wes Stewart <n7ws@_arrl.net>
wrote:

>Then there's "sonic differences" between tube amps and solid-state,

Ignoring for a moment the effects of microphonics and valve's use for
guitar amps, then there is certainly a valve sound vs. a transistor
sound. However this is a _bipolar_ transistor sound, not specifically
a solid-state sound. Better MOSFET designs (like Self's for E&WW a
couple of years back) avoid this.

--
Smert' spamionam

JD

"Jonny Durango"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 12:27 AM

I will be documenting the project with pictures, descriptions and diagrams.
Hopefully there will be a link to the project from www.ls35a.com . In the
mean time you can check out that website (ls35a.com) for info about building
speakers and get great speaker diagrams made by Peter Lotter....even
crossover diagrams and other important specs. Also there is a Yahoo group
dedicated to the ls3/5a ...if you can't find help there let me know and I'll
do my best to help out!

--

Jonny Durango

http://www.soundclick.com/ratcitymusic.htm

"Of course the people don't want war. But after all, it's the leaders of the
country who determine the policy, and it's always a simple matter to drag
the people along whether it's a democracy, a fascist dictatorship, or a
parliament, or a communist dictatorship. Voice or no voice, the people can
always be brought to the bidding of the leaders. That is easy. All you have
to do is tell them they are being attacked, and denounce the pacifists for
lack of patriotism, and exposing the country to greater danger."
-- Herman Goering, Hitler's Reich-Marshall, at the Nuremberg trials after
WWII.



"Ed Lowenstein" <[email protected]> wrote in message
news:[email protected]...
> Could you share some details on this speaker project. I think I'm
> interested in trying it. Where did you get the plans? Are the
> components easy to come by? How expensive? Thanks much
> ---> Ed

Hj

Hitch

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 6:35 PM

> It's the glue.
>
> Russian birch is usually made with interior glue.
>
> Finnish birch (Baltic) uses exterior glue.
>

All of the Russian plywood I've seen in Seattle has fewer plies than the
little bit of Baltic birch I've seen. Is that common? The Russian plywood
seems to be less dense, also.


--
John Snow
"If I knew what I was doing, I wouldn't be here"

Hj

Hitch

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 9:57 PM

>
>
>

I bought some from Compton's. I think it's 7-ply. It was on sale, so I
got a few sheets for something non-critical, but I'll check out Crosscut
for more important cabinets.

--
John Snow
"If I knew what I was doing, I wouldn't be here"

AD

Andy Dingley

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 12:05 AM

On Wed, 21 Apr 2004 09:11:08 -0700, "mp" <[email protected]> wrote:

>Most high-end speaker
>systems do not use MDF as a cabinet material as it's acoustic properties can
>be bettered by other materials.

Like what ? I've a pair of Musician Bonsais (if you remember obscure
Scouse loudspeaker designs from 25 years ago) which have cases made of
an organic polymer concrete. Now that's better than MDF, but it's
pretty damned obscure.

For rational materials though, MDF is pretty hard to beat. It's crummy
shelf-building properties actually work to its advantage for speaker
cabs.


--
Smert' spamionam

eE

[email protected] (Ed Lowenstein)

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 8:43 AM

Could you share some details on this speaker project. I think I'm
interested in trying it. Where did you get the plans? Are the
components easy to come by? How expensive? Thanks much
---> Ed

JD

"Jonny Durango"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 2:08 AM

> As far as speaker cabinets are concerned, why not use MDF?

I'm building cabinets for a pair of LS3/5A reference monitors which were
built to very strict specs under liscense of the BBC. These were some of the
most critically designed speakers of their time and even small variations in
construction/material will make a difference. To quote from the website
www.ls35a.com:

"The cabinet walls are made from 12mm (0.5 inch) selected birch plywood with
internal fillets from beech. Because of the critical nature of the design it
was found that the substitution of other wood for the walls or fillets
caused clearly audible changes. The use of any hardwood for the beech
fillets produced a audible colouration caused by the resonance of the B110
on its chassis."

Thanks for the clarification about the plywood!

--

Jonny Durango

http://www.soundclick.com/ratcitymusic.htm

"Of course the people don't want war. But after all, it's the leaders of the
country who determine the policy, and it's always a simple matter to drag
the people along whether it's a democracy, a fascist dictatorship, or a
parliament, or a communist dictatorship. Voice or no voice, the people can
always be brought to the bidding of the leaders. That is easy. All you have
to do is tell them they are being attacked, and denounce the pacifists for
lack of patriotism, and exposing the country to greater danger."
-- Herman Goering, Hitler's Reich-Marshall, at the Nuremberg trials after
WWII.



"Lew Hodgett" <[email protected]> wrote in message
news:[email protected]...
>
> "Jonny Durango" writes:
> > I am building a pair of studio reference speakers, and the *very* tight
> > specs call for Baltic birch plywood cabinets. I accidentally bought
> Russian
> > birch ply. I've read in here before that they are the same thing, but
the
> > names would tend to imply otherwise. Can one of the many plywood experts
> > clarify?
>
> It's the glue.
>
> Russian birch is usually made with interior glue.
>
> Finnish birch (Baltic) uses exterior glue.
>
> If you ever try to laser cut a piece of Russian, it will be a problem.
>
> HTH
>
> As far as speaker cabinets are concerned, why not use MDF?
>
>
> --
> Lew
>
> S/A: Challenge, The Bullet Proof Boat, (Under Construction in the
Southland)
> Visit: <http://home.earthlink.net/~lewhodgett> for Pictures
>
>

Ba

B a r r y

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 10:20 AM

On Wed, 21 Apr 2004 00:50:44 +0100, Andy Dingley
<[email protected]> wrote:

>But cheap MDF makes a better speaker cabinet.

Unless you want to move it. <G>

Most portable and musical instrument speaker enclosures are birch ply,
as it's lighter and more durable than MDF.

If it's not moving often, I'm with you, MDF is better,

Barry

JD

"Jonny Durango"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 7:56 AM

> I had a pair of these, if I recall they were Spendors, great speakers.
>
> Bernard R

Yes, Spendor makes an 11 ohm version of the LS3/5A...you are right, they are
great speakers. I can't wait to get these finished!

--

Jonny Durango

http://www.soundclick.com/ratcitymusic.htm

"Of course the people don't want war. But after all, it's the leaders of the
country who determine the policy, and it's always a simple matter to drag
the people along whether it's a democracy, a fascist dictatorship, or a
parliament, or a communist dictatorship. Voice or no voice, the people can
always be brought to the bidding of the leaders. That is easy. All you have
to do is tell them they are being attacked, and denounce the pacifists for
lack of patriotism, and exposing the country to greater danger."
-- Herman Goering, Hitler's Reich-Marshall, at the Nuremberg trials after
WWII.



"Bernard Randall" <[email protected]> wrote in message
news:[email protected]...
>
> "Jonny Durango" <[email protected]> wrote in
message
> news:bIkhc.181005$JO3.104305@attbi_s04...
> > > As far as speaker cabinets are concerned, why not use MDF?
> >
> > I'm building cabinets for a pair of LS3/5A reference monitors which were
> > built to very strict specs under liscense of the BBC. These were some of
> the
> > most critically designed speakers of their time and even small
variations
> in
> > construction/material will make a difference. To quote from the website
> > www.ls35a.com:
> >
> > "The cabinet walls are made from 12mm (0.5 inch) selected birch plywood
> with
> > internal fillets from beech. Because of the critical nature of the
design
> it
> > was found that the substitution of other wood for the walls or fillets
> > caused clearly audible changes. The use of any hardwood for the beech
> > fillets produced a audible colouration caused by the resonance of the
B110
> > on its chassis."
> >
> > Thanks for the clarification about the plywood!
> >
> > --
> >
> > Jonny Durango
> >
> I had a pair of these, if I recall they were Spendors, great speakers.
>
> Bernard R
>
>

aA

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 6:50 AM

"Jonny Durango" <[email protected]> wrote in message news:<bIkhc.181005$JO3.104305@attbi_s04>...
> > As far as speaker cabinets are concerned, why not use MDF?
>

Johnny can you share some more about the process? I cruised the site
a bit this morning looks interesting as I'm a KEF fan and these
compare favorably to kef.

Where do you expect your investment to come in? I'm looking for
pricing on the cicable xover now, but not having any luck.

Alan

aA

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

23/04/2004 1:49 PM

Wes Stewart <n7ws@_arrl.net> wrote in message news:<[email protected]>...
> On Thu, 22 Apr 2004 00:08:18 +0100, Andy Dingley
> <[email protected]> wrote:
>
> |On Wed, 21 Apr 2004 02:08:07 GMT, "Jonny Durango"
> |<[email protected]> wrote:
> |
> |>The use of any hardwood for the beech
> |>fillets produced a audible colouration caused by the resonance of the B110
> |>on its chassis."
> |
> |Cargo cult bullshit (in a hi-fi product ? how unusual !)
> |
> |You can't claim to tell the difference between beech and oak corner
> |fillets on one hand, then not specify the grade of ply on the other.
> |Use poor (or thin) ply and you _will_ tell the difference.
>
> Heh Heh,
>
> I am reminded of a guy that worked for me who after hours was a
> musician and a "hi-fi" buff.
>
> He was one of those guys who claimed that they could hear the
> difference in speaker wire. Since we were electronic engineers and
> our department had a gazillion dollars worth of test equipment
> available I defied him to assemble a test setup that could measure
> _any_ difference between OFHC (oxygen-free-high-conductivity) copper
> wire and zip cord of the same size. He declined. See:
>
> http://www.national.com/rap/Story/0,1562,3,00.html
>
> and:
>
> http://www.vxm.com/21R.64.html
>
> Then there's "sonic differences" between tube amps and solid-state,
> blah blah....


I won't claim to have heard the difference in high end wire vs. high
end wire, but I COULD hear the difference (when i was into car
stereo's 15 years ago) between monster cable and straight wire flex
connect II interconnects. The later had a more open high end. You
could better place a guitar's strings in a good Mobile Fidelity gold
recording vs the montsters.

JD

"Jonny Durango"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 12:33 AM

> Johnny can you share some more about the process? I cruised the site
> a bit this morning looks interesting as I'm a KEF fan and these
> compare favorably to kef.

I'm going to fully document the construction of these speakers for later
DIY'ers....hopefully it will serve as a complete, comprehensive guide for
anyone interested in building a pair. In the mean time, there is a lot of
great info about the construction and design of these speakers here:
http://homepage.ntlworld.com/paul.whatton/lsinside.html

>
> Where do you expect your investment to come in? I'm looking for
> pricing on the cicable xover now, but not having any luck.

cicable crossovers are great, better than anything else out there for the
ls3/5a. But they are terribly expensive. Unless you have a lot of extra $$$
to dump into them, I would suggest checking out crossovers from Falcon
Acoustics. They are built fully to LS3/5A specs, and in some cases they've
even improved upon the design. They are also MUCH cheaper than cicables:
http://www.falcon-acoustics.co.uk/pl28p4.htm

If you want to build an external crossover similar to the cicables for much
less money, check out the DIY external crossover project on ls35a.com :
http://homepage.ntlworld.com/paul.whatton/lsextx.html

I will set up a webpage to post my documentation of the construction
process. Check back here soon for details!

--

Jonny Durango

http://www.soundclick.com/ratcitymusic.htm

"Of course the people don't want war. But after all, it's the leaders of the
country who determine the policy, and it's always a simple matter to drag
the people along whether it's a democracy, a fascist dictatorship, or a
parliament, or a communist dictatorship. Voice or no voice, the people can
always be brought to the bidding of the leaders. That is easy. All you have
to do is tell them they are being attacked, and denounce the pacifists for
lack of patriotism, and exposing the country to greater danger."
-- Herman Goering, Hitler's Reich-Marshall, at the Nuremberg trials after
WWII.



"Alan W" <[email protected]> wrote in message
news:[email protected]...
> "Jonny Durango" <[email protected]> wrote in
message news:<bIkhc.181005$JO3.104305@attbi_s04>...
> > > As far as speaker cabinets are concerned, why not use MDF?
> >
>
> Johnny can you share some more about the process? I cruised the site
> a bit this morning looks interesting as I'm a KEF fan and these
> compare favorably to kef.
>
> Where do you expect your investment to come in? I'm looking for
> pricing on the cicable xover now, but not having any luck.
>
> Alan

BA

Bay Area Dave

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 4:16 PM

such as?

dave

mp wrote:

snip
Most high-end speaker
> systems do not use MDF as a cabinet material as it's acoustic properties can
> be bettered by other materials.
>
>

KS

"Kevin Singleton"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

20/04/2004 6:28 PM

They're not the same, but, as long as the Russian ply has adequate density,
and is otherwise of the required dimensions, your drivers won't know the
difference. You might want to consider using MDF, though.

Kevin
--
=====
Where are those Iraqi WMDs, NOW?


"Jonny Durango" <[email protected]> wrote in message
news:9yghc.35388$yD1.101760@attbi_s54...
> I am building a pair of studio reference speakers, and the *very* tight
> specs call for Baltic birch plywood cabinets. I accidentally bought
Russian
> birch ply. I've read in here before that they are the same thing, but the
> names would tend to imply otherwise. Can one of the many plywood experts
> clarify? Thanks!
>
> --
>
> Jonny Durango
>
> http://www.soundclick.com/ratcitymusic.htm
>
> "Of course the people don't want war. But after all, it's the leaders of
the
> country who determine the policy, and it's always a simple matter to drag
> the people along whether it's a democracy, a fascist dictatorship, or a
> parliament, or a communist dictatorship. Voice or no voice, the people can
> always be brought to the bidding of the leaders. That is easy. All you
have
> to do is tell them they are being attacked, and denounce the pacifists for
> lack of patriotism, and exposing the country to greater danger."
> -- Herman Goering, Hitler's Reich-Marshall, at the Nuremberg trials after
> WWII.
>
>
>
>

Ba

B a r r y

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

24/04/2004 11:35 AM

On Thu, 22 Apr 2004 20:11:10 GMT, "Jonny Durango"
<[email protected]> wrote:


>Nonetheless, the difference between beech, and say maple fillets might be
>very audible, just as the difference between using basswood and poplar
>kerfed lining in a guitar body would be audible to some people. I don't
>think *I* could tell the difference, but I'm pretty certain an acoustic
>specialist or gifted sound technician could

Be careful comparing materials used in acoustic instruments and
speaker cabinets. The instrument is creating a sound, the speaker is
reproducing it.


>> Then there's "sonic differences" between tube amps and solid-state,
>> blah blah....
>
>now this is VERY audible. Anyone who plays electric guitar (and I do) can
>attest to this. I'm fairly certain that I could pass an intense "blind amp
>test" and pick out every single solid state and every single tube, and my
>ears aren't even that good.

I'm with ya' there. The same goes for any other instrument amp.
Tube amps have definite, unique properties, especially when
overdriven. Heck, even good blues harp players use a tube amp, rather
than blowing straight into a high quality vocal mic.

Many stand-up bass players specify ONLY old Ampeg tube gear when they
rent amplification.

I'll end by pointing out that solid state Marshalls only caught on
with collectors... <G>

Barry

WS

Wes Stewart

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 9:06 AM

On Thu, 22 Apr 2004 00:08:18 +0100, Andy Dingley
<[email protected]> wrote:

|On Wed, 21 Apr 2004 02:08:07 GMT, "Jonny Durango"
|<[email protected]> wrote:
|
|>The use of any hardwood for the beech
|>fillets produced a audible colouration caused by the resonance of the B110
|>on its chassis."
|
|Cargo cult bullshit (in a hi-fi product ? how unusual !)
|
|You can't claim to tell the difference between beech and oak corner
|fillets on one hand, then not specify the grade of ply on the other.
|Use poor (or thin) ply and you _will_ tell the difference.

Heh Heh,

I am reminded of a guy that worked for me who after hours was a
musician and a "hi-fi" buff.

He was one of those guys who claimed that they could hear the
difference in speaker wire. Since we were electronic engineers and
our department had a gazillion dollars worth of test equipment
available I defied him to assemble a test setup that could measure
_any_ difference between OFHC (oxygen-free-high-conductivity) copper
wire and zip cord of the same size. He declined. See:

http://www.national.com/rap/Story/0,1562,3,00.html

and:

http://www.vxm.com/21R.64.html

Then there's "sonic differences" between tube amps and solid-state,
blah blah....


AD

Andy Dingley

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

21/04/2004 12:50 AM

On Tue, 20 Apr 2004 21:24:21 GMT, "Jonny Durango"
<[email protected]> wrote:

>I am building a pair of studio reference speakers, and the *very* tight
>specs call for Baltic birch plywood cabinets. I accidentally bought Russian
>birch ply.

They're the same thing. They may not be exactly the same, but you'd
have to look into the quality grading marked on the boards to tell
them apart. At the level of "birch plywood" they're equal.

But cheap MDF makes a better speaker cabinet.

--
Smert' spamionam

WS

Wes Stewart

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

23/04/2004 7:45 AM

On Thu, 22 Apr 2004 14:41:47 -0700, "mp" <[email protected]> wrote:

|> Then there's "sonic differences" between tube amps and solid-state,
|> blah blah....
|
|If you can't hear the difference between tube and solid amps on a decent
|quality system then you have a tin ear.

Ah, but I speak of those to whom a tube amp sounds "better." In other
words, distortion is good. [g]
|

AD

Andy Dingley

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

23/04/2004 12:13 AM

On Wed, 21 Apr 2004 21:13:48 -0700, "mp" <[email protected]> wrote:

>MDF is pretty good, it's resonance properties are predictable, and it's easy
>to work with, but many designers feel it sounds dull compared other choices.

Resonance ? What are we making here, loudspeakers or violins ?

JD

"Jonny Durango"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 12:25 AM

> such as?
>
> dave
>
> mp wrote:
>
> snip
> Most high-end speaker
> > systems do not use MDF as a cabinet material as it's acoustic properties
can
> > be bettered by other materials.

LS3/5A's and their many variants are 12mm birch ply with real wood veneer.
In fact the BBC expirimented using MDF and other materials and found that
they didn't sound as good. More info at www.ls35a.com

--

Jonny Durango

http://www.soundclick.com/ratcitymusic.htm

"Of course the people don't want war. But after all, it's the leaders of the
country who determine the policy, and it's always a simple matter to drag
the people along whether it's a democracy, a fascist dictatorship, or a
parliament, or a communist dictatorship. Voice or no voice, the people can
always be brought to the bidding of the leaders. That is easy. All you have
to do is tell them they are being attacked, and denounce the pacifists for
lack of patriotism, and exposing the country to greater danger."
-- Herman Goering, Hitler's Reich-Marshall, at the Nuremberg trials after
WWII.



"Bay Area Dave" <[email protected]> wrote in message
news:[email protected]...
> such as?
>
> dave
>
> mp wrote:
>
> snip
> Most high-end speaker
> > systems do not use MDF as a cabinet material as it's acoustic properties
can
> > be bettered by other materials.
> >
> >
>

JD

"Jonny Durango"

in reply to "Jonny Durango" on 20/04/2004 9:24 PM

22/04/2004 8:11 PM

> Heh Heh,
>
> I am reminded of a guy that worked for me who after hours was a
> musician and a "hi-fi" buff.
>
> He was one of those guys who claimed that they could hear the
> difference in speaker wire. Since we were electronic engineers and
> our department had a gazillion dollars worth of test equipment
> available I defied him to assemble a test setup that could measure
> _any_ difference between OFHC (oxygen-free-high-conductivity) copper
> wire and zip cord of the same size. He declined. See:

these people are what level-minded "audio-enthusiants" like myself would
refer to as self-righteous hi-fi geeks. People who claim they can hear the
difference in humidity and barometric pressure....it's just ridiculous.
Nonetheless, the difference between beech, and say maple fillets might be
very audible, just as the difference between using basswood and poplar
kerfed lining in a guitar body would be audible to some people. I don't
think *I* could tell the difference, but I'm pretty certain an acoustic
specialist or gifted sound technician could

>
> http://www.national.com/rap/Story/0,1562,3,00.html
>
> and:
>
> http://www.vxm.com/21R.64.html
>
> Then there's "sonic differences" between tube amps and solid-state,
> blah blah....

now this is VERY audible. Anyone who plays electric guitar (and I do) can
attest to this. I'm fairly certain that I could pass an intense "blind amp
test" and pick out every single solid state and every single tube, and my
ears aren't even that good.

--

Jonny Durango

http://www.soundclick.com/ratcitymusic.htm

"Of course the people don't want war. But after all, it's the leaders of the
country who determine the policy, and it's always a simple matter to drag
the people along whether it's a democracy, a fascist dictatorship, or a
parliament, or a communist dictatorship. Voice or no voice, the people can
always be brought to the bidding of the leaders. That is easy. All you have
to do is tell them they are being attacked, and denounce the pacifists for
lack of patriotism, and exposing the country to greater danger."
-- Herman Goering, Hitler's Reich-Marshall, at the Nuremberg trials after
WWII.



"Wes Stewart" <n7ws@_arrl.net> wrote in message
news:[email protected]...
> On Thu, 22 Apr 2004 00:08:18 +0100, Andy Dingley
> <[email protected]> wrote:
>
> |On Wed, 21 Apr 2004 02:08:07 GMT, "Jonny Durango"
> |<[email protected]> wrote:
> |
> |>The use of any hardwood for the beech
> |>fillets produced a audible colouration caused by the resonance of the
B110
> |>on its chassis."
> |
> |Cargo cult bullshit (in a hi-fi product ? how unusual !)
> |
> |You can't claim to tell the difference between beech and oak corner
> |fillets on one hand, then not specify the grade of ply on the other.
> |Use poor (or thin) ply and you _will_ tell the difference.
>
> Heh Heh,
>
> I am reminded of a guy that worked for me who after hours was a
> musician and a "hi-fi" buff.
>
> He was one of those guys who claimed that they could hear the
> difference in speaker wire. Since we were electronic engineers and
> our department had a gazillion dollars worth of test equipment
> available I defied him to assemble a test setup that could measure
> _any_ difference between OFHC (oxygen-free-high-conductivity) copper
> wire and zip cord of the same size. He declined. See:
>
> http://www.national.com/rap/Story/0,1562,3,00.html
>
> and:
>
> http://www.vxm.com/21R.64.html
>
> Then there's "sonic differences" between tube amps and solid-state,
> blah blah....
>
>
>


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