Kenwood KR-70 receiver

Stereo Receiver, the best in FM reception. The finest in stereo sound

New from Kenwood, stereo receiver designed for the FM buff who demands the finest in broadcast reception and who also enjoys the luxury of a complete stereo system. Two integrated circuits IF stage and 2 FETs in the FM front-end, coupled with a 4-gang tuning condenser, provide better than average sensitivity, superior alternate channel selectivity and freedom from noise and interference. Silent, automatic switching from mono to stereo activates a stereo indicator light. A power output of 75 watts (IHF) at 4 Ω  and 56 watts at 8 Ω , inputs to accommodate phonograph, tape deck, and auxiliary, 2 pairs of stereo speaker terminals, plus center channel output, with output switch to control speakers individually or together, and Kenwood's famous U.S. patented power transistor protection circuit are among the features that account for the high performance characteristics of the KR-70. the best in broadcast reception, the highest standards in stereo componentry - all at the delightfully low price, including cabinet.

 

Special features

2 Integrated Circuits FM IF Stages

2 Field Effect Transistors (FET)

4-gang Tuning Condenser Super-sensitive Front-end

New "Luminous Dial";

Tuning Meter and FM Stereo Indicator

Solid State Time Switching FM Multiplex Demodulator and Automatic Stereo Mode Silent Switching Circuit

Unique keyboard Controls Regulate Loudness Control

Noise Filter

Tape Monitor and Mode

Front Panel Dubbing/Tape Recording Jack and Stereo headphone Jack

Silicon Power Transistor Amplifier (U.S. Pat. 3277385)

Power Transistor Protection Circuit

2 pair of Stereo Speaker Output Terminals for 2 Sets of Stereo Speakers and Front Panel Speaker Selector Switch (A speakers, B speakers, A-B speakers, Headphones)

Center Channel Output

Handsome Simulated Walnut Finish Cabinet Included in the price of Unit

 

Specifications

FM Tuner Section

Sensitivity (IHF):  1,9 µV

Total Harmonic Distortion: less than 0,8% (400 Hz, 100% Mod.)

Signal-to-Noise Ratio: better than 60 dB

Capture Ratio:  2,5 dB

Image Rejection:  better than 70 dB

IF Rejection:  better than 80 dB

Selectivity:  45 dB (alt. Channel)

Stereo Separation:  better than 35 dB at 1,000 Hz

IF Stage:  2 ICs, 2 Transistors

Front-end:  2 FETs, 4-gang tunig condenser

Spurious Radiation:  less than 34 dB (50 µV)

Antenna Impedance:  300 Ω  balanced

Amplifier Section

Total Music Power (IHF):

75 watts at 4 Ω

56 watts at 8 Ω

Continuous Power Each Channel Driven:

33/33 watts at 4 Ω

24/24 watts at 8 Ω

Both Channel Driven:  18/18 watts at 8 Ω 

Total Harmonic Distortion :  less than 0,5% at rated output

Intermodulation Distortion :  less than 0,5% at rated output

Frequency Response

High Level Input:  20 Hz to 30,000 Hz ±1,5 dB

Power Bandwidth (IHF):  20 Hz to 30,000 Hz

Input Sensitivity (for rated output)

Mag :  2,0 mV

Aux :  200 mV

Tape Play (PIN) :  200 mV

Tape Play (DIN) :  200 mV

Recording Output:

PJN :  200 mV

DIN :  35 mV

Dubbing :  200 mV

Max. Input Signal:  180 mV (p-p 1,000 Hz) at mag Input

Hum and Noise (below rated output)

Phono 9Mag) :  60 dB

Aux :  70 dB

Tape Play :  70 dB

Noise at Minimum Volume Control:  less than 1,5 mV at 8 Ω  or 0,26 microwatt

Damping Factor:  23 at 8 Ω

Speaker Impedance:  4, 8, 16 Ω

Bass Control:  ±10 dB at 100 Hz

Treble Control :  ±10 at 10,000 Hz

Noise Filter:  3,000 Hz cut-off

Loudness Control (at -30 dB):  +8 dB at 100 Hz, +3 dB at 10,000 Hz

Power Requirements:  AC 110 - 120 V, 50/60 Hz

Power Consumption:  113 watts at full power (20 watts at no signal)

Dimensions (W x H x D):  16-1/2" x 5-1/2" x 12-1/2"

Weight:  21 lbs