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Kenwood KR-4070

AM/FM Stereo Receiver (1977-80)

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Kenwood KR-4070


Tuning range: FM, MW

Power output: 40 watts per channel into 8Ω (stereo)

Frequency response: 15Hz to 70kHz

Total harmonic distortion: 0.1%

Damping factor: 40

Input sensitivity: 2.5mV (MM), 150mV (DIN), 150mV (line)

Signal to noise ratio: 73dB (MM), 95dB (DIN), 95dB (line)

Output: 150mV (line), 30mV (DIN)

Speaker load impedance: 4Ω to 16Ω

Dimensions: 468 x 149 x 360mm

Weight: 9.4kg


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Hi-Fi Stereo

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Reviewed Oct 09th, 2018 by martinyu

Very good sound on high frequency as violin ,but only 40 W output ..can buy it on Ebay,about $100.00 dollars .

Reviewed Aug 23rd, 2017 by hughray

I had one of these for years (1978 - 1990) and regret having sold it. So, I bought one used for $100 with the B-7 side wood panels. I took the front face apart and cleaned it thoroughly. All the lamps work perfectly and it sounds as good as I remember. Matched up with a Sansui SR-212 TT and some classic Ohm Model E speakers and it sounds so nice. The loudness button and tuner section are highlights on this underrated unit.

Reviewed Mar 16th, 2017 by xonkism

Impressive little no frills budget amp. Picked one up cheap, ran it thru with deoxit, changed a 8 volt lamp, cleaned it up, sounds like new! sharply dressed as well. good beginner, for sure!

Reviewed Sep 30th, 2014 by Sealtest

Great sounding and performing receiver. Bad Power switches plague the kr-4070's so beware of that. This would make a great first budget receiver for just about anyone.



Rotary switch

My dad bought this new way back and I've had it since 1989. I had it unplugged for a few years and now I've noticed a glitch on the power knob. The sound will switch between left, right and both speakers and is affected by touching the power knob. I don't have to turn it - just trying to tilt it is enough and left alone it will switch too. I guess the rotary switch (SW1) or one of the parts connected to the shaft that causes these problems. Does anyone know what could be causing this? This amplifier means a lot to me.

re: Rotary switch

Hi Eboot,

I have the same amplifier and the same problem. With me it worked to remove the switch, inject WD-40 and then put on the switch and rotate it a lot to get the stuff inside. Once in a few months the problem may come back, but swift rotating helps then.

Good luck,

No Sound but powers up

I just bought a Kenwood KR-4070 Stereo Receiver. I have had it hooked up for days it was perfect. All of a sudden I played my CD Player for a while today then switched it over to the radio & it totally quit producing any sound still powers up all lights work properly. What should I do?

Service Manual for KR-4070

Does anyone have a PDF copy of the service manual for a Kenwood KR-4070 receiver? I downloaded the instruction manual already.

Bad intermittent /arcing int. speaker sel.on/off switch

I realize this is a common problem with these type switches on Kenwoods of this era. any known fixes? It seems I arced the entire FM dial out , while the signal strength and center tuning still work fine...in addition to the stereo light ....any suggestions are welcome!

re: Bad intermittent /arcing int. speaker sel.on/off switch

These units use silver plated wafer switches. What does silver do over time? It oxidizes... You need to run the Green label De-Oxit spray on these switches, and CAREFULLY run a wooden stick Q-tip cotton applicator over the connecting wafer , on both sides, while switching positions. This will effectively clean the switch, and renew it;. BTW silver oxide is better known as :"Tarnish". Happens over time. The Green Label De-oXit is also recommended for older potentiometers, the RED label, Not so much... Both Signal & speaker selector switches will require this treatment & is recommended for any Vintage receiver when you acquire it.

This website is not affiliated with or sponsored by Kenwood. To purchase KR-4070/KR-4070L spares or accessories, please contact the company via their website or visit an authorised retailer.