1. LOW DISTORTION POWER AMPLIFIER SECTION
The power amplifier section is composed of a current mirror
load differential amplifier, a class-A amplifier, and an
inverted Darlington type pure complementary circuit.
The first stage is a transistorized differential amplifier
to which a current mirror circuit is loaded. The current
mirror circuit increases the gain at the first stage and
assures low distortion and stability.
The power amplifier stage consists of an inverted Darlington
type pure complementary circuit to improve the power supply
efficiency and to obtain high output power.
If DC voltage exceeding specified limit is developed at the
output terminal, the protective circuit turns off the relay
to prevent the speakers from being damaged. This circuit
also functions as a delay start circuit.
2. SEPARATION OF LEFT AND RIGHT CHANNELS POWER SUPPLY
This power supply system is of DPS (dual power supply) type
with a 2-winding transformer. The power transformer uses a
large sized El core to provide excellent regulation. The
combination of this transformer and a large filter capacitor
forms a dual power supply system to supply power to L and R
This power supply system eliminates dynamic crosstalk as
well as it assures reliable operation of the amplifier. The
power supply unit for the preamplifier is equipped with a
transistorized power voltage regulator to improve the
circuit operation stability and the quality of sound.
3. TONE CONTROL CIRCUIT
The tone control circuit has FET at the first stage; it also
contains dual power supply unit, 2-stage direct-coupled flat
amplifier and bass/treble control circuit. This control
circuit is so called BAX type NF control circuit that
assures high stability and low distortion. The flat
amplifier is of the ICL (input capacitorless) type to adjust
bass and treble tones up to ±7.5 dB at about 1.5 dB steps,
thus enabling fine adjustment of tonal quality.
4. ICL EQUALIZER WITH FET CIRCUIT
This circuit is a simplified ICL circuit consisting of FET
input amplifier, class-A amplifier and pure complementary
The use of newly developed super low noise FET and cleverly
designed circuit reduces the impedance of the entire circuit
to improve S/N ratio to 86 dB (2.5 mV input, IHF A). The
adoption of precision resistors and film capacitors provides
RIAA characteristic with error of ±0.3 dB.
5. SPECIAL TAPE-THROUGH CIRCUITRY
This unit has facilities for simultaneous recording by two
tape decks and for dubbing from deck A to B In addition,
Kenwood’s tape-through circuitry allows you to dub while
listening to a different program source. This may not be a
feature you will use every day, but it is quite practical
and will be appreciated when the occasion arises.
6. LARGE POWER METERS VISUALLY SHOW OUTPUT POWER
With these full-size Power meters you always know what your
amplifier is doing. You can visually check output and
A refinement for audiophiles, these meters are large and
illuminated for easy reading. Notice that sensitivity is
adjustable for operation at both high and low levels to get
maximum range in both cases. High: 0.1W to 80W; low,
0.01W to 3W.
7. TWO SPEAKER SYSTEMS
You can attach two speaker systems and select either or both.
8. LOUDNESS CONTROL
This control ( + 8 dB at 100 Hz) boosts especially the low
frequency range at a low listening level and offers you
splendid stereo reproduction.
9. BALANCE CONTROL
This control performs the volume adjustment of right/left
speakers and headphones.
10. EXCELLENT DESIGN
Kenwood's excellence of design and superior craftsmanship is
evident not only in the electronics of the unit but also in
all the controls.
• 41-click master volume to suit audiophiles' tastes.
• Subsonic filter of 1 8 Hz, 6 dB/oct.