New project with GPA woofers-drivers

Hello, fellows!
I just finished my new project with GPA woofers and drivers. It is 4-way speaker with GPA 515-16C, GPA 414-16B, GPA 288-16H, all with Alnico V magnets. For VHF I use BMS 4552-16ND in small Spheric Wave Tractrix Horn.
I would like to tell many thanks to Bill and Steve for great job! GPA are the best loudspeakers in the World!

Just few photos:

http://s018.radikal.ru/i521/1202/ff/8a4f3660bfd4.jpg
http://s018.radikal.ru/i522/1202/07/1e0c66655b17.jpg
http://s018.radikal.ru/i504/1202/3a/35884711abac.jpg
http://s61.radikal.ru/i171/1202/10/377dcada3ab7.jpg
http://i032.radikal.ru/1203/17/0e5627d8850c.jpg
http://s018.radikal.ru/i503/1203/cd/ab4d75c9dd3f.jpg

Those look really nice. Good work Mike.

Very Nice Mike ! Great Job ! All Those Brand New GPA Drivers Looks So Very Sweet....

Great looking speakers!!!!! Please keep us updated on how they sound!!!!! 4 way modern Altec type speakers....... who would have thought, great job!!!!!!!!

Very Very cool.
I want to hear them. I'll be over....oh, wait, where do you live?
Ron

Those are some true pieces of art. A+ buddy. :)

Beautiful work! Love the look of the curved front.

I didn't know GPA made a new version of the 288. I've only seen the 390's & the 399's on their website. I'm just putting together a new midrange set up & would be very interested to get some more detail on these.

Cheers,
John

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....

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

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

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

Quote:

---

Originally Posted by mikebond

hello, fellows!
I just finished my new project with gpa woofers and drivers. It is 4-way speaker with gpa 515-16c, gpa 414-16b, gpa 288-16h, all with alnico v magnets. For vhf i use bms 4552-16nd in small spheric wave tractrix horn.
I would like to tell many thanks to bill and steve for great job! Gpa are the best loudspeakers in the world!

http://www.hostboard.com/forums/hbmc...2012/05/16.jpg

---

drooool!!!

Great work! those look very nice and I bet they even sound better than they look. enjoy and keep us informed on there performance!!!!

Superb Mikebond! A most impressive and beautiful accomplishment.

Quote:

---

Wonder why they don't have them on the web site.

---

They do, where the strong market is. USA is very quickly becoming a 3rd world country in terms of consumerism. We get by with cheap junk produced with slave labor in the orient while the rest of the world is enjoying the "good stuff".

Anywho, polish up your Japanese and have a looksee here: Great Plains Audio???? - ????????

Hey, Look at history. China is trying to catch up with a previous position it held in world production, pre Industrial Revolution. At current rates this could be 20 years or so. The West has been lazy and is reluctant to use its advantages to stay ahead by investing in its intellectual resource potential. Capitalism is conservative and tends to milk the last drop from a failing situation. Once the writing is well and truly on the wall the Capitalists seem to rally in strength, leaving a lot of wreckage behind. Is there a better way? I hope so!

P.S. Don't write the US of A off. What it needs are old fashioned visionaries in politics rather than the modern politician who won't hold a view without consulting the Polls. This political disease is rampant on both sides of politics and worldwide in Western countries. If you need a revolution in progress you need leaders who are up with the game and looking to the future - hard to do if you are captive to the support of Yesterday's Men(hard when they finance election campaigns). Capitalists will milk the last dying drop from a declining situation before becoming motivated to try something else. Politicians need to be ahead of them, not in their thrall, to utililise business potential.. Big change required on both sides. It is OUR choice. Can you make it?

Non - partisan comment. Definitely OT.

Quote:

---

P.S. Don't write the USofA off.

---

I haven't written her off. But she is only now just beginning to "wake up" when she should really be throttling full steam ahead to her resolve. Sadly, i don't think she even has a viable plan on the drawing board yet. But, i will not give up hope.

Bowtie, I made some edits. Much the same but clarified a little - not sure if you caught them.

Cheers, Marshall.

Quote:

---

Originally Posted by bowtie427ss

Superb Mikebond! A most impressive and beautiful accomplishment.

They do, where the strong market is. USA is very quickly becoming a 3rd world country in terms of consumerism. We get by with cheap junk produced with slave labor in the orient while the rest of the world is enjoying the "good stuff".

Anywho, polish up your Japanese and have a looksee here: Great Plains Audio???? - ????????

---

Those 414 and 515 alnico models are SEXY! USA quality and craftsmanship is IN DA HOUSE!!!
I'm going to raid my savings account and buy some of those for my next build....gotta support the locals.

Quote:

---

Originally Posted by Alien_Shore

Those 414 and 515 alnico models are SEXY! USA quality and craftsmanship is IN DA HOUSE!!!
I'm going to raid my savings account and buy some of those for my next build....gotta support the locals.

---

I wish they'd(GPA) get some calendars printed up using some of those beautiful stock pics for the artwork. I'd be the first inline to buy a few. Some of us still like paper calendars with sexy pin-ups, and those would do just fine!

Customers' pics of their own DIY systems using GPA stock would be pretty cool too, the ones above right at the top of the list.

Quote:

---

Bowtie, I made some edits. Much the same but clarified a little - not sure if you caught them.

Cheers, Marshall.

---

Caught them eventually, and i'm largely in agreement with you.