Anyone built anything like PMCs trans. line monitors?

imperfectcircle · 5th March 2007, 02:00 AM

I recently heard a pair of PMC TB2+ monitors and was quite impressed at the big sound from these small bookshelf speakers. Has anyone done a similar transmission line bookshelf speaker?? I believe PMC uses Vifa drivers.

PMC transmission line monitors

leadbelly · 5th March 2007, 03:43 AM

Looks kinda fishy to me, at first look I would think it is a highly compromised TL, hardly a true TL at all in fact.

seanzozo · 5th March 2007, 04:22 AM

Looks like a 56" TL with a very small cross section. I listened to a pair of those years ago, I recall them being not bad.

Sean

Tenson · 5th March 2007, 06:24 PM

PMC use their 'advanced transmission line' technology. So no, they are not the same as you would get from Martin's MathCAD sheets for example. Compromised? Actually, I don't think so, they seem to work VERY well!

I would suggest they might be modelling them as a small enclosure with a very long and wide port. Might be worth an experiment to see how such a speaker turns out.

seanzozo · 5th March 2007, 06:30 PM

Martin's worksheets should model this TL fairly easily. Its a constant CSA line with the driver offset slightly.

Sean

5th March 2007, 02:00 AM	#1
imperfectcircle diyAudio Member Join Date: Jan 2005 Location: nyc	Anyone built anything like PMCs trans. line monitors? I recently heard a pair of PMC TB2+ monitors and was quite impressed at the big sound from these small bookshelf speakers. Has anyone done a similar transmission line bookshelf speaker?? I believe PMC uses Vifa drivers. PMC transmission line monitors

5th March 2007, 03:43 AM	#2
leadbelly diyAudio Member Join Date: Dec 2002 Location: Calgary, Alberta	Looks kinda fishy to me, at first look I would think it is a highly compromised TL, hardly a true TL at all in fact. __________________ Aerodynamics are for people who can't build engines. Enzo Ferrari

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5th March 2007, 04:22 AM	#3
seanzozo diyAudio Member Join Date: Jan 2005 Location: Austin	Looks like a 56" TL with a very small cross section. I listened to a pair of those years ago, I recall them being not bad. Sean

5th March 2007, 06:24 PM	#4
Tenson diyAudio Member Join Date: Feb 2006 Location: Kent	PMC use their 'advanced transmission line' technology. So no, they are not the same as you would get from Martin's MathCAD sheets for example. Compromised? Actually, I don't think so, they seem to work VERY well! I would suggest they might be modelling them as a small enclosure with a very long and wide port. Might be worth an experiment to see how such a speaker turns out.

5th March 2007, 06:30 PM	#5
seanzozo diyAudio Member Join Date: Jan 2005 Location: Austin	Martin's worksheets should model this TL fairly easily. Its a constant CSA line with the driver offset slightly. Sean

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