604-8K or 604-8L in M600 Maestro?

**Panomaniac** · December 16th, 2009, 07:04 PM

I think the pair I have here were. I'll have to ask John. They are his and he had them rebuilt at GPA. I know that they had symbiotic frams originally.

**Altec Best** · December 17th, 2009, 04:50 PM

Was the 604-168X for higher power also I know it was for bi-amping ??? And I think also sold without networks.

**whitebroncoii** · December 18th, 2009, 03:03 PM

Originally Posted by Altec Best

Was the 604-168X for higher power also I know it was for bi-amping ??? And I think also sold without networks.

I do not have any info on the 604-168X.
My best guess would be it was a standard 604 with a 16 ohm HF and no network.
This was a common component configuration for the Stanley Screamer.

**Old Guy** · December 18th, 2009, 07:18 PM

Originally Posted by Altec Best

Was the 604-168X for higher power also I know it was for bi-amping ??? And I think also sold without networks.

I think it replaced the 604 HPLN with slightly higher power handling

http://www.altecpro.com/pdfs/vintage...%20Speaker.pdf

**bowtie427ss** · December 18th, 2009, 07:25 PM

Probably just the lighting or camera angle, but the pic on that data sheet could have a fella believe that frame is white(looking at the rim of the basket).

Aren't those (604-168X) what Stanal Sound used in some of their Screamers?

**whitebroncoii** · December 19th, 2009, 12:30 AM

I offer these specs after reviewing the data sheets;

604-HPLN (no network)
alnico motors
aluminum HF diaphragm
Multicell horn
80W pink noise
16" frame
literature has 1978 date code

604-168X (no network)
ferrite motors
aluminum HF diaphragm
Mantaray horn
100W pink noise
16" frame
literature has 1981 date code

904-8A (network included)
ferrite motors
Symbiotic HF diaphragm
Mantaray horn
150W pink noise
16" frame
literature has 1984 - 1987 date codes

**Old Guy** · December 19th, 2009, 09:30 AM

Well done on the info...

Would it be worthwhile to add the HPLN is the only one using the multicell?

**whitebroncoii** · December 20th, 2009, 12:28 AM

Originally Posted by Old Guy

Well done on the info...

Would it be worthwhile to add the HPLN is the only one using the multicell?

I did . . .

**RonSSS** · December 26th, 2009, 10:22 PM

Originally Posted by whitebroncoii

And you made an excellent point.
The 604-HPLN and the 904-8A are little known members of the club.
Either one could be rebuilt into a true 604!

Longtime member of this group. I have a pair of modified 904-8A. I changed the symbiotic frams for GPA 34647's. Removed the loading caps and added felt to the covers. I still have the orig frams, 34726 if anyone is interested.

I removed the bug screens, I'm a believer in that.

So what else is required to make this a true 604? I know the LF cone is more HD....but these sound awfull good to me! especially with subwoofers.

Ron