Kenwood KA-7100 Vintage DC Stereo Integrated Amplifier w/Rack Handles - Serviced

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Great looking integrated from Kenwood and a super platform to build a vintage system.

Capable of connecting your turntable (MM, Moving-Magnet), as well as multiple other sources.

Plus it features very capable tone controls for getting the most out of your vintage speakers.

In overall very good cosmetic condition and lightly serviced for reliable operation.

Cosmetic Notes:
• Front faceplate is clean and free of significant blemishes.
• Top edge of face has some light dings.
• Cover shows some light scratching on the top and sides.
• Power plug was replaced at some point in the past. Tested and verified safe/correct replacement performed.

Service Notes:
• All controls cleaned & lubricated and tested.
• Known troublemaker relay drive transistor replaced.
• Electrolytic capacitors checked for acceptable value and ESR.
• All functions tested for proper operation - PASS.

Click below to add our recommended matching cables from Kimber Kable, all brand new as SkyFi is an official Kimber dealer.

Kimber Kable - RCA Interconnects

Kimber Kable - Phono Interconnects

Kimber Kable - Speaker Cables

More from Kenwood:
The development of the DC power amplifier can be counted as one of our most significant engineering successes, because it provides an almost perfect linear frequency response that starts virtually from 0 Hz.

What this means is that the signal amplified has effectively the same waveform as that at the input terminals. The amplifier maintains extremely low distortion right down to the ultra-low frequency range. With excellent phase and transient characteristics - the response in actual conditions of musical reproduction - the sound that you hear is perfectly natural.

The direct-coupled amplifier consists of a three-stage differential circuit (with a dual-gate FET in the first stage) and our power amplifier circuitry, assuring ample, highly stable, effective power output.

To safeguard all circuits, and your precious speakers, there's a built-in limiter protection circuit and protection relays.

With phase and transient distortion both at negligible levels, the Kenwood KA-7100 provides a refreshing clarity and roundness of sound even at high volume levels.

Specifications
Power:
60 watts per channel into 8Ω (stereo)

Frequency Response:
0 Hz to 100 kHz

THD:
0.02%

Damping Factor:
50

Input Sensitivity:
2.5 mV (MM Phono)
150 mV (line)

Signal to Noise Ratio:
80 dB (MM Phono)
110 dB (line)

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

Speaker Load Impedance:
4Ω to 16Ω

Dimensions:
16.93" x 5.87" x 17.92"
(430 x 149 x 379mm)

Weight:
25.35 lbs.
(11.5kg)

Production Years:
1977 - 1979

The SkyFi Testing Process for Solid State Integrated Amplifiers:
We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage.

We then power up the unit carefully and run a simple 1k sine wave while monitoring the output on an oscilloscope for signs of distortion or noise. Finally, we run the amplifier to its full rated power into the appropriate resistive load provided by our Sencore amplifier tester. If there is an issue, it will usually be noticeable at this point. If everything reads clean, we will often test for THD (Total Harmonic Distortion) measured by our Keithley distortion meter, and compare it against the original manufacturers specifications. The amplifier then remains powered on to "burn in" on our test bench for a few hours to make sure there are no heat related issues. If there are balanced inputs available they will be also be tested.

Final testing involves pushing actual music thorough the amplifier. We've learned over time that some issues are only noticeable to a trained ear while listening to familiar source material. Our test bench has reference vintage KEF speakers that we're very familiar with which quickly reveal any discrepancies. Some amplifiers will then move into our listening room where they are tested with our in-house reference speakers of choice.