Pure Power Boots
Listening Pleasure
In the trend towards
higher output powers, the CA-610 is unique. The minimum 40 Watts per channel is
generous. With most home listening done between 1 and 10 Watts it can even be
overwhelming. But the tremendous sense of scale, of unstrained ease in reproduction,
and vast reserves of power, is more than you would expect from 40 Watts (and
certainly more than you would get from most competitive amplifiers in the same
class).
Capable of
recapturing for you the thrill of an orchestral ‘tutt’ or a live rock concert
the sound is never choked in noise or smeared with distortion at low levels.
From a mere 250 mW
up to the full rated output of 40 Watts, and for all frequencies from 20 Hz to
20 kHz, the CA-610 gives no more than 0,05% THD. At 20 Watts output that drops
to 0,01% (0,005% at 1 kHz) And signal-to-noise ratio is 75 dB for a 2.5 mV phono
input. It all adds up to a new experience in impressive, powerful reproduction.
The meters cover outputs from 0,01W to 100 W in one unswitched range a valuable
feature that lets you know how much power your speakers are handling.
Ultra Low Distortion
Tone Control Circuitry.
The CA-610 tone
controls offer the ideal combination of characteristics; simple to operate,
they add virtually no distortion to the final sound. You can boost or cut
treble and bass to suit your mood, your choice of music, or the acoustics of
your room and speakers. And you can do it all without sacrificing quality for
the convenience.
The special Yamaha
negative feedback circuitry, and perfect crystal device trchnology used in the
semiconductors, give smooth and precise control, with perfectly flat ‘0’ (zero)
position. And so that you can compare the effects of your tone control settings,
there are separate ‘defeat’ switches for bass and trebl, instantly bypassing
the boost and cut circuits. Thespecial Yamaha design ensures that distortion is
held to a minimum, typically contributing only 0,008% from 20 Hz to 20 kHz with
90 dB S/N ratio and 0,4 mV residual noise for the Aux terminals.
Music waveforms are
incredibly complex, and the pulse plus sine wave response of the CA-610 shows
how faithful reproduction of such signals is.
Clearly Audible Advance in Quality
The CA-610 is more
than the sum of its parts. More than a combination of superb equalizer
amplifier for record reproduction, sophisticated tone controls, and a powerful
main amplifier. It’s truly integrated. And not only is power high, the
distortion hits new lows at all listening levels form the quietest to the very
loudest.
A Fantastic Range of
Operating
The Ca-610 combines
full tape monitoring and dubbing facilities with a new ability. Now, not only
can you copy direct from one tape deck to another in any direction, and monitor
recordings while they are being made (if you have a three-head tape deck),
You can also listen to any program source while you are recording. This lets
you save time by dubbing at double speed, while relaxing to the sound of your
favorite record. Or your can record an FM program for later audition while
listening to a pre-recorded tape.
More Than an
Amplifier - A Complete Control Center
If you hear the
Ca-610 you can hardly fail to want it. If you select it, you are sure to want
the matching tuner; the CT-610. Together, they stand right at the top of their
class, and from the nucleus of a first quality home stereo system.
The CA-610 has
a precision volume control, perfectly in balance within +_1 dB form 0 to
-70 dB, with an attenuation curve that makes it easy to set the exact level you
want. Then there is the -20 dB muting switch for an instant cut in volume. And
the useful Rec Out Off position, cutting out the effect of tape decks when not
recording. A host of useful features.
Advanced Equalizer
Design
With its four-stage
direct-coupled configuration, the equalizer resembles power amplifier design
more than it does conventional circuitry. All four stages (differential
current-mirror first stage plus emitter/ collector/ emitter-follower) operate
under constant current bias, and give excellent open loop performance. The
result is high stability and ultra-low distortion with moderate NFB for superb
dynamic characteristics.
Sophisticated
Amplifier Design
The combination of
differential current-mirror first stage, and common emitter plus
Darlington-connected fully symmetrical complementary output-capacitorless (OCL)
output stage, with careful choice of high performance, low input capacity
transistors in closely matched pairs, gives power amplifier performance
virtually indistinguishable from Class A operation. Low frequency response is
improved by separate power supplies for differential amp., pre-drive, and power
stages, via two 6,800 uF smoothing capacitors.
Specifications
Continuous
Min. RMS Power (both channels driven at rated distortion, 20Hz-20kHz):
50 +
50 Watts at 4 Ω
40 +
40 Watts at 8 Ω
Total
harmonic Distortion: 0,05% or less
(rated output)
Intermodulation
Distortion: 0,05% or less (rated output)
Power
bandwidth (IHF, both channels driven):
10 -50 ,000 Hz
Damping
factor (8 Ω, 1 kHz): better than 50
Output
Terminals: A, B or A + B (front panel
switch)
Speaker
Impedance:
A or B
: 4 to 16 Ω
A + B
: 8 to 16 Ω
Frequency
response (Aux to Sp. Out): 20 Hz -
20,000 Hz +0,2 -0,3 dB
RIAA
Deviation: 20 Hz - 20,000 Hz ±0,3 dB
Signal-to-noise
Ratio (IHF-A network):
Aux to Sp.
Out : 90 dB
Phono to Sp.
Out : 75 dB
Residual
Noise (Pre + Main Amp , 8 Ω): 0,4 mV
Input
Sensitivity/Impedance:
Phono
: 2,5 mV/50 k Ω
Tuner,
Aux tape PB ( 1,2) : 150 mV/50 k Ω
Phono
Dynamic Margin (1 kHz,0,1% THD) : 150 mV/1 k Ω
Output
Level/Impedance:
Tape
Rec Out (1, 2): 150 mV/1 k Ω
Tone
Controls:
Bass : ± 12
dB boost/ cut at 50 Hz
Treble : ±
10 dB boost/ cut at 10 kHz
Loudness
Control (volume -30 dB): 50 Hz : +9 dB,
10 kHz : +5 dB
Subsonic
Filter: -3 dB at 25 Hz (12 dB/oct)
Audio
Muting: -20 dB
Semiconductors: 4 Ics; 29 Transistors; 13 Diodes plus 3 Zener
Diodes;
Power
Source: 110/130/220/240 V AC switchable, 50/60 Hz
Power
Consumption: 105 Watts
Dimensions (W x H x D): 435 x
150 x 298 mm (17⅛" x 6" x 11¾")
Weight: 8 kg (17,6 lbs)