KENWOOD KA-9100 DC AMPLIFIER
Independent, dual power supplies on the power amp with seperate pre-amplifier per channel.
95 watts rms per channel into 8-Ohms
110 watts rms per channel into 4-Ohms
This is Kenwood’s Top Of The Line integrated Stereo Amplifier built back in the late 70’s. It’s an awesome piece of Hi-Fi audio gear.
I connect all my HF transceivers to this amplifier and use it as my "Audio Switching Center". This unit drives the two Infinity monitor speaker system. The sound is sweet and beautiful especially when YOUR transceiver can deliver the high-fidelity sound.
Features -
DC POWER AMPLIFIER - Although an "ordinary" amplifier is generally provided with input or inter-stage capacitors, the KA-9100 power-amplifier section does not have any input or inter-stage capacitors. In addition the NF loop circuit does not have any capacitor that may be accompanied with a time constant. Therefore there is no phase difference throughout the frequency range including the super low frequency zone. Since the DC power amplifier is almost free from distortion, excessive distortion, rising time etc, it offers extensively improved sharpness and depth of sound as well as gorgeous dimensional feeling. Resolution is very good even at a high sound level. This amplifier assures highly qualified reproduction.
TWO INDEPENDENT POWER SUPPLIES - The KA-9100 uses the equivalent of two monophonic amplifiers, each with its own power supply. This arrangement completely eliminates the occurrence of dynamic crosstalk which is considered to influence the quality of sound rigorously. In particular, the power supply for the preamplifier section employs exclusively designed transistorized regulators to improve a mutual interference between former and latter stages of the amplifier.
ICL EQUALIZER USING A CONSTANT CURRENT LOAD - Use of an ICL has greatly improved the phase and transience characteristics. And the use of a constant current load has provided low distortion over a wide range.
LOW DISTORTION,HIGH S/N RATIO TONE CONTROL CIRCUIT - A tone control circuit is necessary to correct the frequency response in accordance with influence of the room, the speaker characteristics etc, but this section can be harmful due to the generation of distortion and noise. Kenwood however has prevented it by using a FET differential amplifier circuit in the first stage of the amp and a BAX type tone amp.
REFINED LOUDNESS CONTROL - Essential for high-fidelity listening at low levels, this control has been designed in accordance with the latest research in the differential response in human hearing. There is a choice of two curves and turnover frequencies. (great especially for those late night mellow listening sessions)
Other facilities/functions -
Master volume control with click detents. Tone-defeat. Two pair of speakers - A,B,A+B. Pre-amp out/Power-amp in sockets. Two Tape monitors (also caters for CDR, Minidisc etc). Two Phono inputs. Tuner & amp inputs: Aux/CD inputs also. AC-outlets. Meter range switching. Mono/Stereo/Reverse facility. Three-stage gain control. Subsonic & amp: High filters. Retro & amp: Pretty VU meters (the sound doesn't pass through these, so no degradation of sound occurs)
110/120 volt & 220/240 volt operation.