Enzy, why do you have 2 preamp channels but both have the same mono input? Since you have two or more power amplifiers all with the same mono signal then you only need one preamp, not two. One preamp can feed many power amplifiers.
Do you need more than one preamp because each power amp needs its own volume control which has been decided works best at the input of the preamp since the power amp is far away and cable capacitance cuts high frequencies when fed from a volume control at the output of the preamp?
It was recommended by Audioguru since he said the output needs to be 1v RMS to get full power from the amplifier.
this was the specs I gave him
- Power: 300W 8R (+ -75V), 600W 4R (+ -75V), 1000W 2R(+ -75V)
- Power supply voltage: DC+-60V~+-80V, (recommend voltage DC+ -75V)
- Distortion:0.07 % THD+N 600W 2 R
- Voltage gain:33 DB
- Loading resistance: 2Ohm
- Total Idle Power Consumption: 13.2W
- System Efficiency: 80% 600W 2R
- Dynamic Range : 99.4 DB
- Residual Noise: 290 UV
- Damping Factor:>70 (1K HZ ,2R)
- Frequency Response: 20Hz-20kHz + -1DB
Since Im feeding 2 mono amplifiers normally they would need separate controls since they would control 2 sets of speakers, most times one set of speaker isnt close by me so that section is turned up loader than the speakers close by.
Or I might be using one side to play tweeters and one side to play a low frequency mid range and I want to use 2 different controls.
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If I joined the output of one to the input section of the other would that be beneficial or would it work out to being just the same as using a single opamp or a single side of the dual opamp
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Ok I did the dual polarity version also and remove the bias stage.
yes I am guessing no doubt Audioguru is aware of me not understanding creating circuits, as I said I normally make circuits just never created any for myself since I dont have the knowledge.
So giving him my specs he recommended the preamp this would be my second preamp circuit.
SO you recommend a voltage follower and since I lack the knowledge it sounds ok to me but why wouldnt someone else suggest that. I normally state that my signals only come from phones, laptops professional mixers and cd players.
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