Technics presents an
amp which, while not the absolute highest in power, has plenty of punch
especislly for the majority of people who listen to music at less than full
power from their amps anyway. And we haven't neglected waveform fidelity, which
means that this amp will amplify the input signal while adding or subtracting
little or nothing from the waveforms of the original music. So you'll get
distortion-free amplificationover a wide and flat frequency range. Plus these
great operating conveniences; FL meters to replace conventional output meters,
a versatile recording selector, a stable, rugged power supply and advanced
NF-type tone controls. The list of features and specs will give you the facts
and figures. But the real test of this amp is in the listening.
DC Power Amplifier
Helps Preserve Waveform Fidelity
Waveformfidelity has
been greatly enhanced in Technics SU-8044K by the elimination of coupling
capacitors not only in the signal path but also in the NFB loop.
The lack of
something is offen a defect. But here the absence of capacitors means gain all
the way down to 0hz and phase linearity in the bass frequencies. The result, in
this DC power amplifier, is waveform fidelity - the accurate reproduction of
musical waveforms.
Advanced Power
Dynamic Sound
The SU-8044K offers
plenty of power for dynamic sound, and superior waveform fidelity. Here are
some of the circuit features that make it possible; a single-packaged,
low-noise dual transistor is used in the differential amplifier first stage for
low noise and precise thermal tracking. Current-mirror loading provides high
open loop gain, without increasing the level of noise. This output assisted by
the emiter follower, drives the voltage amplifiaction stage (Class A) with
minimal distortion especially in the high frequency range. A 2-stage Darlington
connection is used in the power stage, all adding up to plenty of power and
insignificant distortion.
Super Quiet Phono
Equalizer
The SU-8044K has an
unbelievably high Signal-to-Noise ratio of 80 dB (at 2,5 mV sens. IHF A) when
using an MM type cartridge, a spec rarely found in this amp's price class. It
means that noise won't interfere with your enjoyment of records, evn during very
soft passages. There is a 3-stage direct coupling MM phono equalizer section
with direct coupling of the PNP-NPN transistors, plus a PNP transistor in the
emitter-follower. A few of the reasons for low distortion and high gain are the
separation of DC and AC in the negative feedback loop of the equalizer, 100% DC
feedback and the use of narrow tolerance components for negative feedback.
Treble and bass
Controls
An advanced
operational IC is used for the negative feedback-type tone controls. Bass and
treble can be easily boosted or attenuated to suit individual tastes without
introducing distortion.
Accurate peak-Power
Indication
The easy-to-read FL
(fluorescent) meters are an improvement over conventional peak power indicators
because of their near-instantaneous response and superior accuracy. They can be
switched between two ranges: 0,1W - 100W, a range that is useful when metering
for full peak power: 0,01 W - 10 W, the range at which most listening is
usually done.
Versatile Recording Selector
The SU-8044K has two
tape positions on the input selector as well as on the recording selector in a
logical and practical layout. With this complete separation, you can do such
things as dub from tape to tape while listening to your favorite disc. Or tape
from your tuner while listening to music on another tape.
Rugged Stable power
Supply
The power supply is
designed to handle the sudden current demands of high energy musical transients
without losing sound clarity or introducing transient crosstalk. This is done
by using two large capacity 8,200 µF electrolytic capacitors in the bridged,
full-wave rectifier circuit and by employing a recently-developed transformer.
It also supplies regulated voltage to the phono equalizer circuit. The
transformer coils are floated in a special resin to absorb unwanted vibrations.
Even at low volume levels you can enjoy your favorite music without being
bothered by a noisy transformer.
Other Features
Muting circuit
eliminates shock noise when the power is turned on and off, providing added
speaker protection.
High filter to cut
out high frequency noise such as record scratches and tape hiss.
Loudness switch for
use when lisstening at low volume levels. Lows and highs are boosted to make up
for "deficiencies" in the way the human ear responds at low volume
levels.
Front-panel speaker
selector lets you select either of two speaker systems (A or B) boith or at
onec (A + B)
Specifications
Amplifier Section
(IHF)
Continuous Power
both Channel Driven
From 20 Hz - 20 kHz
2 x 40 W at 4 Ω
2 x 38 W at 8 Ω
From 40 Hz - 16 kHz
2 x 40 W at 4 Ω
2 x 38 W at 8 Ω
At 1 kHz
2 x 46 W at 4 Ω
2 x 40 W at 8 Ω
Total Harmonic
Distortion:
Rated Power (20 Hz
to 20 kHz)
0,03% at 4 Ω
0,02% at 8 Ω
Rated Power (40 Hz -
16 kHz)
0,03% at 4 Ω
0,02% at 8 Ω
Rated Power (1 kHz)
0,03% at 4 Ω
0,02% at 8 Ω
Half Power (1 kHz)
: 0,015% (8 Ω)
Half Power (20 Hz -
20 kHz) : 0,08% (8 Ω)
-26 dB Power (1 kHz)
: 0,15% (4 Ω)
50 mW Power (1 kHz)
: 0,2% (4 Ω)
Intermodulation
Distortion:
Rated Power (250 Hz
: 8 kHz = 4 : 1 ) : 0,03%
Rated Power (60
Hz : 7 kHz = 4 : 1 SMPTE 8 Ω) : 0,02%
Power Bandwidth(
both channel driven -3 dB):
At 4 Ω : 5 Hz - 30 kHz
At 8 Ω : 5 Hz - 50 kHz
Residual Hum and
Noise: 0,8 mV (0,6 mV, IHF A)
Damping Factor: 16 (4 Ω);
32 (8 Ω)
Headphones Output
Level/Impedance: 400 mV/330 Ω
Load Impedance
Main or Remote: 4 Ω - 16 Ω
Main and
Remote: 8 Ω - 16 Ω
Input
Sensitivity/Impedance
Phono : 2,5 mV/47 k Ω
Tuner, Aux : 150 mV/47 k Ω
Tape 1, Rec/Play
: 180 mV/33 k Ω
Tape 2 : 150 mV/33 k Ω
Phono Max.input
Voltage (1 kHz RMS): 150 mV
Signal-to-Noise
Ratio
Rated Power (4 Ω)
Phono : 73 dB (80 dB IHF A)
Tuner, Aux, Tape
: 86 dB (97 dB, IHF A)
-26 dB Power (4 Ω)
Phono : 62 dB
Tuner, Aux, Tape
: 63 dB
50 mW Power (4 Ω)
Phono : 58 dB
Tuner. Aux, tape
: 60 dB
Frequency Response;
Phono : 30 Hz - 15 kHz (RIAA standard curve ±0,8 dB)
Tuner, Aux, Tape
: 10 Hz - 50 kHz (-1 dB) ±0,5 dB (20 Hz
- 20 kHz)
Tone Controls
Bass : 50 Hz +10 dB /-10 dB
Treble ; 20 kHz +10 dB / -10 dB
High Filter: 7 kHz, -6 dB/oct
Loudness Control
(Volume at -30 dB): 50 Hz , +9 dB
Output
Voltage/Impedance
Rec Out : 150 mV
Rec /Play : 30 mV/82 k Ω
Channel Balance
Aux (250 Hz - 6300
Hz) ±1 dB
Channel Separation
Aux (1 kHz) 58 dB
General
Power Consumption:
400 W
Power Supply: AC 110/120/220/240 V 50/60 Hz
Dimensions (W x H x
D): 430 x 142 x 255 mm 916-15/16" x
5-19/32" x 10-1/32")
Weight: 6,7 kg (14,8 lb)
