Shell Manhasset 2020P
High Fidelity Stereophonic Control Center
Model 2020P is a complete high fidelity stereophonic control center consisting of two identical twenty watt amplifiers equipped with fully equalized pre-amplifiers for tape heads and magnetic pickups.
A combined power rating of 40 watts (80 watts peak) provides ample power for full enjoyment of High Fidelity sound.
The 2020P is equipped with a DC filament for the pre-amps and a self contained highly stable power supply, all of which are integrated on a single chassis of advanced design.
All outputs and inputs are of the dual variety, rendering full stereophonic or monaural reproduction.
Either amplifier channel or both channels can be used simultaneously for monaural operation.
Included in it's design is a binaural output jack which can be used to extend the system to a three speaker system by adding a basic power amplifier of any power output.
The binaural output is of the low impedance type and has a voltage output of more than sufficient capability for the high impedance requirements of add-on amplifiers.
The 2020P binaural output jack combines both channels of the amplifier without affecting the performance of either channel.
Of importance is the fact that the signals of both channels are additive, in that the output of channel 1 and 2 add to twice the output.
For better performance and flexibility, the amplifier has the exclusive dynamic input balance controls located conveniently on the front panel.
Both channels may be balanced exactly and visually by means of the Stereophonic Electron Eye.
Power output: 40 watts per channel into 8Ω (stereo)
Frequency response: 30Hz to 20kHz
Total harmonic distortion: 1%
Damping factor: 8
Input sensitivity: 4mV (MM), 300mV (ceramic), 300mV (line)
Signal to noise ratio: 70dB (MM), 80dB (line)
Channel separation: 45dB (line)
Speaker load impedance: 4Ω to 32Ω
Valve complement: 4 x 7189, 2 x 7199, 2 x ECC82/12AU7, 1 x ECC83/12AX7, 1 x GZ34/5AR4, 1 x 1629
Dimensions: 15 x 10-1/2 x 4-5/8 inches
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