Late 1980's Preamp and Power Amp Combo!
In nice condition. Cabinets have a few scratches, but it does not take away from this amazing sounding and rare combo! Original box and packing are not included. Manuals can be found on line.
Delivers 200 watts per channel, uses no overall negative feedback (a Nelson Pass trademark), and boasts the Stasis section, which consists of a low-power voltage amplifier coupled to the current mirror bootstrap output stage to do all the heavy lifting required for high-power output. Back in 1989, when Stereo Review featured the PA-7, writer Julian Hirsch measured the PA-7’s output at 253 watts into an 8-ohm load, 400 watts into a 4-ohm load, and 650 watts into two ohms. A quick look under the hood reveals why. A large 700 VA toroidal transformer and a bank of power supply capacitors totaling 132,000 µf proves the PA-7 means business.
Power output: 200 watts per channel into 8Ω (stereo)
Frequency response: 20Hz to 20kHz
Total harmonic distortion: 0.1%
Damping factor: 60
Input sensitivity: 2V
Signal to noise ratio: 120dB
Semiconductors: 16 x output transistors per channel
Dimensions: 435 x 200 x 421mm
CA-5 Pre amp Specifications:
Frequency response: 1.5Hz to 100kHz
Total harmonic distortion: 0.002%
Input sensitivity: 0.17mV (MC), 2.4mV (MM), 200mV (line)
Signal to noise ratio: 72dB (MC), 81dB (MM), 90dB (line)
Channel separation: 66dB (MM), 62dB (MC), 74dB (line)
Output: 200mV (line), 2V (Pre out), 16V (Pre out Max)
Dimensions: 435 x 63 x 289mm
Full specs from manuals are last two images