Why is it not common to see high power amplifier with single ended power supply? I have a big transformer (around 7A) with 14Vac or about 20Vdc that I want to use for as highest wattage amplifier as possible. The front end can be driven with higher rail voltage if necessary. Is there such amplifier design somewhere?
Thanks
Thanks
+/- Rails...
An amplifier running from a single-ended supply must use an output coupling capacitor because the output must be at 1/2 Vcc for the amp to operate in a linear fashion. Dual amps get to run the output at 0 V and, naturally, have no need for an output coupling capacitor. Capacitors can limit low frequency response and electrolytic capacitors can cause distortion by non-symmetry leakage/impedance issues.
An amplifier running from a single-ended supply must use an output coupling capacitor because the output must be at 1/2 Vcc for the amp to operate in a linear fashion. Dual amps get to run the output at 0 V and, naturally, have no need for an output coupling capacitor. Capacitors can limit low frequency response and electrolytic capacitors can cause distortion by non-symmetry leakage/impedance issues.
Multiplier! That's a good idea, thanks. I will use the 20V-0-20V for Quasi NBIP using 4x or 6x 2N3773 per channel. I don't know how much wattage it would be...
Yup, right here: Zeus Amp
That'll get around the need for a dual, +/- supply.
It's not a multiplier. It's two back-to-back half wave rectifiers running off the same xfmr. You're looking at a whole essssssss-load of problems: DC core magnetization, and making the filtering job twice as hard as it would be with full wave rectification.
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