Kenwood KA-5700 specifications

Brand : Kenwood

General

Connections

Technical data

Special features

Original Kenwood description

Special features (from the orig. User Manual)

Tuner,Phono,Aux,Tape

Tape Rec Out, Headphone Output (6.3mm jack plug)

Continuous power (at total harmonic distortion)
- 8 Ohm s: 2x 40 W (20-20,000 Hz)
- 4 Ohm : 2x 55 W (1 kHz)
Dynamic power
- 8 Ohm :
- 4 Ohm : 170 W
Total harmonic distortion: 0.04% (8 ohm), 0.02% (4 ohm ) at rated power
Attenuation factor: 30 (8 ohms)
Power bandwidth: 10 - 40,000 Hz
Signal-to-noise ratio:
- Source: 100 dB
- Phono: 76 dB
Stereo channel separation:
Tone control:
- Bass: ±7,5 dB
- Treble: ±7,5 dB
Loudness: +7dB at 100Hz (at a level of -30dB)
High Filter : no
Low Filter (subsonic): yes (18Hz, 6dB/Oct.)

The powerful power output stage has a huge dynamic range and guarantees distortion-free reproduction of the usable Frequency spectrum up to the modulation limit.
Due to the unusual noise voltage distance of 76 dB, no disturbing noises such as hum or self-noise of the amplifier are perceptible even when fully controlled without an input signal.
Built-in, watt-calibrated power meters enable continuous monitoring of the actual output power and thus also the exact symmetry setting of the two stereo channels.
The protection circuit responds immediately to short circuits and overload and protects the valuable power amplifier transistors as well as the connected speakers from damage.

Power amplifier stage with lowest distortion
The power amplifier is held in direct coupling and consists of a differential amplifier equipped with a current mirror circuit, a Darlington circuit of operating class A and a purely complementary circuit. The current mirror circuit not only leads to high gain, but also guarantees excellent stability in the differential amplifier. In the second stage, the amplifier design of operating class A is provided with a Darlington circuit equipped with PNP transistors, which in turn contributes to high stability of the current mirror circuit used in the first stage. This sophisticated circuit technology records very high sinusoidal continuous tone power with 40 watts per channel at 8 ohms, with a total harmonic distortion of only 0.04% over the entire audible frequency spectrum from 20 to 20000Hz.

Kenwood KA-5700