Ampeg V-4B Bass amp, head only, Great project amp
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This is supposedly the holy grail of bass amps (or at least I have heard and read) The Ampeg V-4B is a two-channel, all-tube, 100-watt beast of an amp head. I weighs a good bit…maybe 70 pounds. Like many electronics of the early and mid 70s, the design of the cabinet and control face is Spartan—black and silver. On the far left are two input jacks. Five knobs in the center of the panel control channel 1 gain, channel 2 gain, treble, mid-range, and bass, respectively. Above the EQ knobs you’ll find three boost switches: High frequency boost; a three-position Mid-range boost that emphasizes 300Hz, 1kHz, and 3kHz; and Bass boost. Finally, on the far right are Standby, Polarity and Power switches, with indicator lights above standby and power. Around back of the Ampeg V-4B First thing you notice from the back is that the amp chassis is upside-down, that is, the tube and transformers ‘hang’ down from the chassis/circuit board. I guess this is a fairly common design strategy that allows for, among other advantages, the positioning of the front panel controls near the top of the unit. The back of the amplifier features two 10k Ohm line outputs, two external speaker outputs and a hum balance potentiometer. Also printed on the rear of the chassis are the tube designations. This Amp is a project amp and does not work. It did work until
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