Stereo Receiver 7150

A hi-fi stereo receiver with a 2 x 50 watt amplifier and an AM/FM tuner, with a digital display. With a high-voltage, high-current output stage enabling it to deliver well above its rated power to handle musical transients, and a 'soft clipping' circuit which gently limits the waveform voltage when the amplifier is driven beyond its rated power.

On the rear, connections for AM and FM antennae, adjustable AM aerial, input sockets for phono (MM or MC), Aux, input/output sockets for two Tapes, sockets for Pre-out and Main-in connected with removable U shaped metal jumpers, connectors for two pairs of loudspeakers, switches for MM or MC, Soft Clipping (On/Off), Bridging (On/Off), Speaker capacitance (100pF/200pF/320pF) and a Speakers Impedance switch (Normal/Hi (≥ 8Ω)), the Hi setting can be used where one pair of speakers are connected and their impedance is at least 8Ω, this re-optimizes the amplifier for maximum power. Some models have two AC outlets and some a voltage selector.

On the front, rotary controls for Bass, Treble, Volume/Balance, rotary switches for Speakers (A+B, A, B, Off), Record Selector (Tape 2, Tape 1, Off, Phono, Tuner, Aux), Listen Selector (Tape 2, Tape 1, Phono, Tuner, Aux), press buttons for Power, six station Presets, Enter, AM/FM, Tuning Up/Down, Search Up/Down, Speaker EQ, Infrasonic Filter, Mono, FM Mute, Low Level and Loudness  LEDs for Soft Clipping and FM Stereo and jack for headphones.

Specification
Speakers Impedance Switch Set:            Normal      Hi (≥ 8Ω)
Continuous Average Power Output at
 8 ohm 20-20K Hz both Channels Driven :  50 W        60 W
Rated Distortion  20Hz-20kHz ...............:  <0.03%   <0.03%
Clipping Headroom at 8 ohm .................:  +0.5 dB   +0.5 dB
Clipping Power at 8 ohm .......................:  57 W        68 W
                       at 4 ohm ......................:  80 W        
                       at 2 ohm ......................:  90 W        
Dynamic Headroom at 8 ohm ...............:   +1.8 dB    +1.6 dB
Dynamic Power at 8 ohm .....................:  90 W        100 W
                        at 4 ohm ....................:  150 W        
                        at 2 ohm ....................:  180 W        
Damping Factor at 50 Hz (Ref. 8 ohm) ..:  >100
THD 20Hz-20kHz from 250 mW to 60 W.:  <0.03%
Frequency Response, 20Hz-20kHz .......:  ±0.5 dB
Frequency Response Range -3 dB ........: 10Hz-35kHz
Phono Input Impedance MM & MC ........:  47kΩ
Phono Input Capacitance MM & MC .....:  100pF/200pF/320pF Selectable
Phono Input Sensitivity for 50W out ......:  2.5mV (MM), 0.25mW (MC)
Line Input Impedance/Capacitance .......:  150kΩ/220pF
Line Input Sensitivity for 50W out .........:  145mV

Versions/Power Requirements
110 or 120 V AC 60Hz
220 or 240 V AC 50Hz
110/120/220/240 50/60Hz with voltage selector (not on US/Canada/UK models)

Made in Taiwan

Here you find 120 models, 118 with images and 26 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from NAD, New Acoustic Dimension; Ontario