7 laminates ply birch instead of 13 laminates

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   I haven't used it but you might find phenolic board doesn't take glues the same way as regular ply. I gather it is very waterproof so might not absorb normal water-based wood glue very well.

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snowflake Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 29 December 2004 Location: Bristol Status: Offline Points: 3122	Post Options Post Reply Quote snowflake Report Post Thanks(0) Quote Reply Topic: 7 laminates ply birch instead of 13 laminates Posted: 08 July 2021 at 9:32am
	I haven't used it but you might find phenolic board doesn't take glues the same way as regular ply. I gather it is very waterproof so might not absorb normal water-based wood glue very well.

heavydub Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 07 October 2020 Status: Offline Points: 23	Post Options Post Reply Quote heavydub Report Post Thanks(0) Quote Reply Posted: 07 July 2021 at 6:46pm
	yeah, no brown faces. As I told, the seller said that the only difference is the glue used between each laminate. And I can confirm again quality is BB/BB. Moreover, provenience should be Sweden. The seller is a wood seller, don't know nothing about speakers. He just said that for external usage he advice phenolic panels. If you are using it for internals, the simple birch without phenolic glue should be just fine. But now normal is not available and panels dimention is smaller than the phenolic one. I'm in a hurry so I guess tomorrow I will buy phenolic panels. I will post pictures of them. Edited by heavydub - 07 July 2021 at 6:48pm

csg Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 17 September 2007 Location: bedford Status: Offline Points: 6086	Post Options Post Reply Quote csg Report Post Thanks(0) Quote Reply Posted: 07 July 2021 at 6:16pm
	Are you sure this ply does not have a phenolic face, such as the shiny brown faced flightcase material favoured in Germany? Im guessing as you stated BB/BB it does not, but best to check. Other than that should be fine Check out sheet material wholesale on google, minimum £500 order, but good prices and they deliver
	“The fact is this is about identifying what we do best and finding more ways of doing less of it better”

heavydub Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 07 October 2020 Status: Offline Points: 23	Post Options Post Reply Quote heavydub Report Post Thanks(0) Quote Reply Posted: 07 July 2021 at 12:28pm
	Thank you everybody. I've found new panels today. Birch BB/BB quality 18mm 13 laminates phenolic Everything looks good, but I am not sure that phenolic ply is ok. The seller told me that the wood is absolutely birch, the quality is the same as a non-phenolic panel. The only difference is in the glue used to attach each laminate. I guess and I hope that this will be just good to build boxes. What do you guy think? I've searched in the forum info about phenolic birch but I can't find nothing special. Maybe (but I am not sure) using phenolic birch instead of non-phenolic ply could be better because box should better resist to humidity too?? But again, I don't know. I just hope this wood is ok for scoop building.

citizensc Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 16 October 2015 Location: Perth,Australia Status: Offline Points: 532	Post Options Post Reply Quote citizensc Report Post Thanks(0) Quote Reply Posted: 06 July 2021 at 10:53pm
	When I first got in to sound system stuff, people gave me the advice that I should just use birch. I thought it wouldn't be as important for my tops, I built them out of cheaper ply as I was on a tight budget. Within a year, they were turned in to plant pots and I had rebuilt them out of birch. I didn't save money, I wasted money and time. Honestly just use 13 laminate birch, you will not regret it!
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JonB67 Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 22 April 2016 Location: UK Status: Offline Points: 1376	Post Options Post Reply Quote JonB67 Report Post Thanks(0) Quote Reply Posted: 06 July 2021 at 10:12pm
	Birch is stiffer, more stable, more void free, easier to machine, easier to screw into, cleaner cutting.... The extra money is worth it twice over.

VECTORDJ Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 11 June 2006 Location: United States Status: Offline Points: 515	Post Options Post Reply Quote VECTORDJ Report Post Thanks(0) Quote Reply Posted: 06 July 2021 at 9:54pm
	7 Ply Birch is only Birch on the two outer layers....13 ply Birch is Birch every layer...Way better.

csg Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 17 September 2007 Location: bedford Status: Offline Points: 6086	Post Options Post Reply Quote csg Report Post Thanks(0) Quote Reply Posted: 06 July 2021 at 3:41pm
	Never used it for speakers, so i cant comment. I really would stick to the Birch, even if something else is slightly cheaper you will lose those savings bringing the finish up to the same standard as is quite easy with Birch
	“The fact is this is about identifying what we do best and finding more ways of doing less of it better”

heavydub Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 07 October 2020 Status: Offline Points: 23	Post Options Post Reply Quote heavydub Report Post Thanks(0) Quote Reply Posted: 06 July 2021 at 2:33pm
	I don't need or want, ok. But it can be used for speaker box builds without problems? I mean, mechanical resistance, sound quality, density. I've heard it's more difficoult to cut too.

csg Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 17 September 2007 Location: bedford Status: Offline Points: 6086	Post Options Post Reply Quote csg Report Post Thanks(0) Quote Reply Posted: 06 July 2021 at 2:21pm
	Marine means that the ply is rated for maritime use, approved by Lloyds of london etc. WBP means that the ply should not delaminate when wet. You dont need or want marine ply for speakers.
	“The fact is this is about identifying what we do best and finding more ways of doing less of it better”

heavydub Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 07 October 2020 Status: Offline Points: 23	Post Options Post Reply Quote heavydub Report Post Thanks(0) Quote Reply Posted: 06 July 2021 at 1:43pm
	Awesome! Just another question: what does the "marine" spec means?

csg Members Profile Send Private Message Find Members Posts Add to Buddy List Old Croc Joined: 17 September 2007 Location: bedford Status: Offline Points: 6086	Post Options Post Reply Quote csg Report Post Thanks(0) Quote Reply Posted: 06 July 2021 at 1:39pm
	That will be just fine, use the BB side on the outside obviously!…
	“The fact is this is about identifying what we do best and finding more ways of doing less of it better”