amp guts

[taj]

Fascinating. That Acoustic blue is certainly familiar (I'm showing my age here). As I recall, Acoustic amps were typically MI (musical instrument) amps, bass in particular. This one looks like it was made to be versatile with the input jacks on the front and the back. Use it for bass, keyboards, PA, whatever.

Sakis is right. 2-ohm ratings were unheard-of back then, but 4-ohm amps were not uncommon for PA since they were typically expected to drive parallel 8-ohm speaker cabinets. But if it's spec'ed for handling 2-ohm loads, so be it. Maybe it was just ahead of its time.

If the amp turns out to be ugly sounding, which I would certainly expect, that heatsink tunnel is certainly recyclable! Chassis too I suppose if it's refurbed a bit.

..Todd

[d0n]

Originally posted by Steve Dunlap



The collector seems to be right. That amp was rated at 275W@4 ohms and 375W@2. That was at 5% distortion. This was a PA amp that listed for $899 in 1977.

5% distortion!

Thanks for the info.

[wg_ski]

Originally posted by taj
Sakis is right. 2-ohm ratings were unheard-of back then, but 4-ohm amps were not uncommon for PA since they were typically expected to drive parallel 8-ohm speaker cabinets. But if it's spec'ed for handling 2-ohm loads, so be it. Maybe it was just ahead of its time.
..Todd

Back then, and amp wouldn't have been given a 2-ohm rating unless it could run at 1/3 of its 2-ohm sine wave power indefinitley. Go buy any pro amp nowadays and they can't do that at 4 ohms, let alone 2.

[sakis]

how many people bother to answer this ....

we know exactly how much power this amp makes ....only the OP has no means to find this out .... but any way ...i go from this now

thank u

[d0n]

Originally posted by sakis
how many people bother to answer this ....

we know exactly how much power this amp makes ....only the OP has no means to find this out .... but any way ...i go from this now

thank u

thank you for your wonderful and well though out post. It was a big help!