1590 = 200W
1594 = 100W
1593 = 50W
The "A" model was strange in that it used a positive ground power supply.
All of these power amplifiers were patterned after the tube amps with a multiple-tap output transformers. The 1594B offers output taps of 4 ohms, 8 ohms, 16 ohms, 25V and 70V. The input is routed through an octal socket for either a 15335A or 15095A transformer.
15335A = 15k input
15095A = 600 input with 14dB of gain (used for the end of long wire runs)
Experience is Knowledge
As far as age estimate, mid-70's
specs:
New Page 2
If you go here and scroll down the amp section there is a 1594C manual
Altec Lansing Professional Audio - Vintage Speakers
Connections in and out should be the same.
The reason for patterning after the tube amps was to make them direct replacements to a huge installed base, and installers did not have to be re-trained...the service business was a substantial part of Altec's income...
Your neighbors called. They like your music.
I want to add a comment about sound quality;
The 1593B and 1594B sound great!
Experience is Knowledge
I heard something about using 1588 preamp in the socket for the input transformer. Is it possible?
No, the 1594B octal socket is not wired to supply power for the 1588 mic preamps.Originally Posted by laperlestudio
Experience is Knowledge
Are these the amplifiers that can also be powered from a DC power source?
Not all vegetables make good leaders.
Drive in movies used battery backup...AFAIK all of the 70's solid state stuff, with the exception being the stereo amps, could be DC powered.
Honestly, I didn't work much with old tube stuff.
I used a solid state Altec to build a PA on a golf cart once...
Your neighbors called. They like your music.
Yep, 24VDC. The function was also used in emergency warning systems that had to work in an outage.
"[I]We're going all the way, till the wheels fall off and burn[/I]!"
Bob Dylan, from [I]Brownsville Girl[/I]
[I]"Time wounds all heels"[/I]
John Lennon, referring to the Nixon/Hoover deportation fiasco.
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