Nakamichi PA-7 CA-5

A very rare chance to own a classic combination

Circuit Overview
The PA-7 delivers 200 watts per channel, uses no overall negative feedback (a 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

Weight: 27kg

Price on application

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

Weight: 3.7kg

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