New project with GPA woofers-drivers

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

St?phane

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

Very Nice Mike !

Quote:

---

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)

He had them listed on eBay.. They are made to order.

billatgpa

Quote:

---

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.

Powered by tubes!
300B?
Ron

Mike what are those labels/badges at the bottom of the cabs just below the ports ? I notice you have some eggcrate foam on the walls. Where you getting a lot of reflections ? If so you may want to extend the treatment up to or just higher than the HF horn.Especially with those big 88's.The room looks fairly narrow,is it long and narrow ?

Quote:

---

Originally Posted by RonSSS

Powered by tubes!
300B?
Ron

---

Yes, sir :)
P.P. monoblocks with 300B-XLS by Emission Labs made by me

http://i062.radikal.ru/1203/ef/06e45858af82.jpg

Quote:

---

Originally Posted by Altec Best

Mike what are those labels/badges at the bottom of the cabs just below the ports ?

---

This is my company logo with the name BigSound

Quote:

---

Originally Posted by Altec Best

I notice you have some eggcrate foam on the walls. Where you getting a lot of reflections ? If so you may want to extend the treatment up to or just higher than the HF horn.Especially with those big 88's.

---

Oh .. can ever my wife will allow me to do this :)
Now there are paintings :(

Quote:

---

Originally Posted by Altec Best

The room looks fairly narrow,is it long and narrow ?

---

The room is not very wide, just 3,6 m x 5,5 m
But these speakers are made to order and will soon be in another room