PMC clones

Atomicmidi · 16th July 2011, 10:35 PM

Hi everyone, my first post and already I'm trying to pick brains..

Building a PMC TB2 clone and looking for any info on them, seems there are some pics about TB1 online but nothing about TB2 (I'm talking about open cab pics)..

Anyone got cab schematics? I know it's a long shot..

Will be using different drivers than the TB2 and a different designed from scratch crossover so they are not exactly clones, but I am trying to replicate the cab detail as much as possible so in future I can pop in some Vifa's and see if it changes anything

Cheers!

AllenB · 03:16 AM

Here are some naked cab pics, and some driver pics, and a similar (smaller) PMC DIY project

Atomicmidi · 17th July 2011, 03:26 AM

The guy building the TB1 clone is not taking in account the thickness of internal bracing panels.. they are thinner than the walls.

I also think (judging from photos on the net) that they are actually plywood, and walls made from MDF. There must be a reason behind this... I will try to include such details in my design.

burnett · 09:26 AM

The internal bracings are only 10mm MDF (everything else is 19mm).
Inside Pictures

DrDyna · 17th July 2011, 12:26 PM

That TB2i looks like a good little speaker to copy, but if you're going to make the cabinet dimensions the same and the length of the line and port the same, I'd be inclined to at least keep the woofer the same, I'd imagine a TL that was tuned for a different driver would be a little bizarre sounding, wouldn't it?

Atomicmidi · 17th July 2011, 03:34 PM

That is a concern of mine also, I have very little experience in this but I do dabble in audio engineering so I can trust my ears.. If it sounds wierd I will know straight away.
After all this is just an experiment..

However... I was wondering if there is some software that calculates the tuning maths?
And if there is, does it do TL designs?

Aaaargh so many questions.. I was hoping to just get the PDF and build the thing!

DrDyna · 17th July 2011, 03:56 PM

Quote:

Originally Posted by Atomicmidi

That is a concern of mine also, I have very little experience in this but I do dabble in audio engineering so I can trust my ears.. If it sounds wierd I will know straight away.
After all this is just an experiment..

However... I was wondering if there is some software that calculates the tuning maths?
And if there is, does it do TL designs?

Aaaargh so many questions.. I was hoping to just get the PDF and build the thing!

I'm pretty sure hornresp can do TL, but I'm the wrong guy to explain how, I can barely use it myself with lots of handholding, lol.

You may be able to put the driver you planned on using into hornresp and inputting the copied TL dimensions and see what's going to happen exactly.

burnett · 17th July 2011, 04:40 PM

Quote:

Originally Posted by Atomicmidi

Aaaargh so many questions.. I was hoping to just get the PDF and build the thing!

I do have to search if I still have the cabinet plans for the TB1 as pdf.

planet10 · 17th July 2011, 07:08 PM

THE TL modeling tool is Martin King's mathcad worksheets.

dave

burnett · 23rd July 2011, 06:34 PM

Found them:

TB2A1.pdf

TB2.pdf

16th July 2011, 10:35 PM	#1
Atomicmidi diyAudio Member Join Date: Jul 2011 Location: Belfast	PMC clones Hi everyone, my first post and already I'm trying to pick brains.. Building a PMC TB2 clone and looking for any info on them, seems there are some pics about TB1 online but nothing about TB2 (I'm talking about open cab pics).. Anyone got cab schematics? I know it's a long shot.. Will be using different drivers than the TB2 and a different designed from scratch crossover so they are not exactly clones, but I am trying to replicate the cab detail as much as possible so in future I can pop in some Vifa's and see if it changes anything Cheers!

17th July 2011, 03:10 AM	#2
AllenB diyAudio Member Join Date: Oct 2008	Here are some naked cab pics, and some driver pics, and a similar (smaller) PMC DIY project Last edited by AllenB; 17th July 2011 at 03:16 AM.

17th July 2011, 03:26 AM	#3
Atomicmidi diyAudio Member Join Date: Jul 2011 Location: Belfast	clonez The guy building the TB1 clone is not taking in account the thickness of internal bracing panels.. they are thinner than the walls. I also think (judging from photos on the net) that they are actually plywood, and walls made from MDF. There must be a reason behind this... I will try to include such details in my design.

17th July 2011, 09:20 AM	#4
burnett diyAudio Member Join Date: Oct 2007	The internal bracings are only 10mm MDF (everything else is 19mm). Inside Pictures Last edited by burnett; 17th July 2011 at 09:26 AM.

17th July 2011, 07:08 PM	#9
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	THE TL modeling tool is Martin King's mathcad worksheets. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA


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17th July 2011, 12:26 PM	#5
DrDyna diyAudio Member Join Date: May 2007 Blog Entries: 3	That TB2i looks like a good little speaker to copy, but if you're going to make the cabinet dimensions the same and the length of the line and port the same, I'd be inclined to at least keep the woofer the same, I'd imagine a TL that was tuned for a different driver would be a little bizarre sounding, wouldn't it?

17th July 2011, 03:34 PM	#6
Atomicmidi diyAudio Member Join Date: Jul 2011 Location: Belfast	That is a concern of mine also, I have very little experience in this but I do dabble in audio engineering so I can trust my ears.. If it sounds wierd I will know straight away. After all this is just an experiment.. However... I was wondering if there is some software that calculates the tuning maths? And if there is, does it do TL designs? Aaaargh so many questions.. I was hoping to just get the PDF and build the thing!

23rd July 2011, 06:34 PM	#10
burnett diyAudio Member Join Date: Oct 2007	Found them: TB2A1.pdf TB2.pdf

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