Altec 604E vs GPA 604-8H-III

[Steve Mac]

That is an amazing looking system - would love to give it a listen, but ...

Its Shielded not Sheilded

... they really mispelled it on the label??

Ha! didn't notice that!
Well, took a picture and the label on my driver is different!
http://www.superbadcat.com/images/stereo/511e_6.jpg

[Steve Mac]

Steve, Great Stuff !

Love that big home-theatre thing you've got going there, wow !


>< cheers

ps; If you don't mind, I'll upload some of your pics into this thread / so that / if & when your picture hosting provider changes / it's not all lost into the digital ether.

Thanks Earl...big thanks to Greg (GM) and the great whack pack over at the altec forum for their advice/theory/opinions and understanding of horns and especially altec history. Also, thank God GPA is up and running making brand new 515s and 288s.

The system is essentially built around the 210 LF horn....chopping off the reflex...re-shaping for home theater...allotting within the curve for an inset mid range horn...designing a rear chamber....getting the horn to load down to 80Hz.
The midbass design was 90% of the work...
Here's a link when I was doing some 3d modelling if yer interested:
http://www.superbadcat.com/midBassDesign/midBass.htm
I had a blast building up this system. When I finish the system I'm probably going to drill through the mid bass base with a pipe to route the mid range speaker wire and toughen up the support for the mr horn...it's all just getting held in place temporary right now.

I haven't figured out how I'm going to finish it all...my rock and roll friends have all voted for snake skin tolex...

(I'm sorry if this thread is getting hijacked....)

[darkmatter]

Hi

Has anyone got a copy of the crossover schematic of the N604-8A for GPA 604 8H III Driver?

TIA

Simon

[Horn Fanatic]

Hi

Has anyone got a copy of the crossover schematic of the N604-8A for GPA 604 8H III Driver?

TIA

Simon

If you're using the 604 8H III, IMHO, the stock network isn't really suited for high end audio. I own a pair, so I will suggest you either design and build your own, or pay someone who knows that speaker intimately to design a decent network for them. I believe Jeff Markwart designed a network for the 8H II some time ago. AFAIK, the 8H II and 8H III are the same speaker, save for the new horn Bill Hanuschak implemented about 5 years ago. That Mantaray horn is a real dog. The 604 8H III IMO, is the best sounding 604 model ever, provided it's driven by a decent network. Either that, or run them active as I have.

Just curious. What volume of enclosure are they loaded in?


H.F.

BTW - Jeff is a very nice chap to chat with, if you can pry him out of his Corvette.

FYI - http://home.earthlink.net/~jmarkwart