New project with GPA woofers-drivers

**Altec Best** · March 9th, 2012, 01:18 AM

John they are called the Classic series. You can get 416-8B's,802-8G's, 288-8H's,and a few others in Alnico magnets in 8 or 16 ohm....

**vuki** · March 9th, 2012, 03:28 AM

Wonderful! Please, give us more details - how they sound, measure etc.

**voice of the theater** · March 9th, 2012, 10:49 AM

Those are gorgeous speakers--great build..... The scary thing is that with those GPA drivers they probably sound even better than they look!

**stéphane Rame** · March 9th, 2012, 12:42 PM

Very good job, I also love the production and use of GPA.
What cutoff frequency of the crossover?

St?phane

**mikebond** · March 9th, 2012, 03:25 PM

Hi guys!
These speakers sound great! A deep and fast bass, clear midrange and crystal highs! The port is tuned to 32Hz. External dimensions are 700mm x 1150mm x 600mm. Internal volume for bass reflex is about 360 liters.

http://s018.radikal.ru/i512/1202/41/3e8f2baabb45.jpg
http://s54.radikal.ru/i144/1202/b1/daf6cbc8de51.jpg
http://s017.radikal.ru/i410/1202/c5/ad735110d119.jpg

The crossover cutoff frequency are 200Hz, 800HZ and 10KHz

Regards,
Mike from Moscow, Russia

**SOOTSHE** · March 9th, 2012, 07:49 PM

Originally Posted by Altec Best

John they are called the Classic series. You can get 416-8B's,802-8G's, 288-8H's,and a few others in Alnico magnets in 8 or 16 ohm....

Wonder why they don't have them on the web site. I've sent an email to them requesting more info. I'm just about to purchase some 390's & hadn't heard of these, so now there's a cat among the pigeons!

Mikebond.....tell us about your crossover....who designed it & built it? Crossover slopes?....components used?
They are one impressive looking speaker. (well two actually)

**mikebond** · March 10th, 2012, 10:37 AM

Originally Posted by SOOTSHE

Mikebond.....tell us about your crossover....who designed it & built it? Crossover slopes?....components used?
They are one impressive looking speaker. (well two actually)

The crossover was calculated together with the friend of mine. Some special software was used, like ARTA, LEAP Crossover Design and very cool software 3D Acoustic Research written by my friend. After calculation I spent many hours and days with measuring and testing.
Crossover was made by me using Mundorf coils and capacitors.