The Denon PMA-630 is
a stereo integrated amplifier FTC rated for 8 ohms at 80 watts RMS per channel,
20 to 20,000 Hz at less than 0,01%
T.H.Dbetter than thouch a dual range (20 Hz and 40 Hz) subsonic filter and loudness
compensation are provided, there are no conventional tone controls. Tone
equalization, if desired can be provided through an optional accessory equal
izer, such as a graphic-type equalizer, for which "break in"
preamplifier-poweramplifier connections are provided on the rear. A shorting
bar normally connects the preamp and amplifier. To use an accessory equalizer,
the shorting bars are simply pulled out, thereby "breaking" the
signal path for the equalizer. Other features include automatic dubbing from
and to either of two recorders, a recorder output disconnect (labled Rec out)
which is supposed to avoid some effect of the recorders on sound quality (thogh
we could not measure non hear any
deleterious effect of the recorders on the speaker sound), and an output
hold-off that prevents power supply turn-on transient from being fed to the
speakers. The unit is in a metal cabinet. Three AC convenience outlets are
provided.
Features:
Pre-amplifier
equipped power amplifier that leads the cartridge output to the speaker by way
of a simple signal route
Pure complementary
circuits
Low distortion high
stability DC power amplifier
High output, High
gain equalizer amplifier
Power section that
employs a powerful power transformer and large capacity condensers
Reduction of output
impedance through the adoption of the relay driving system (damping factor: 80
upward)
Rec-out
"Off" function
Specifications:
Main Amplifier
Section
Type: pure complementary push-pull system DC
circuit
Rated Output (both
channels driven)
From 20 Hz to 20 kHz
: 80 W + 80 W RMS at each channel
(T.H.D., 0,008% at 8 Ω)
At 1 kHz : 80 W + 80 W RMS at each channel (T.H.D.,
0,01% AT 4 Ω)
Total Harmonic
Distortion: LES THAN 0,01%
Intermodulation
Distortion: less than 0,005% (at
equivalent rated output)
Less than 0,005% (at
1 watt output)
Power
bandwidth: 5 Hz to 100 kHz (IHF, T.H.D.
0,05%)
Transmission
Characteristic: DC to 100 kHz +0 -1 dB
(at 1 watt output)
Input
Sensitivity/Impedance: 320 mV (RMS)/100
k Ω
Output
Impedance: less than 0,09 Ω
Output Terminals
Speaker:
A & B, 4 to 16 Ω
load
A + B, 8 to 16 Ω
load
Pre-amplifier
Section
Max. Output: 25 V (at 50 k Ω , T.H.D. 0,01%)
Rated Output: 320 mV
Total Harmonic
Distortion: 0,003% (at 10 V output)
Input
Sensitivity/Impedance:
Disc 1 and 2 : 2,5 mV/ 50 k Ω
Tuner ; 320 mV/ 30 k Ω
Aux, Tape : 320 mV/ 30 k Ω
Maximum Allowable
Input
Disc 1 and 2 : 200 mV 1 kHz
RIAA Deviation: less than ±0,2 dB (20 Hz - 20 kHz)
Signal-to-Noise
ratio (IHF, A network)
Disc 1 and 2 ; better than 86 dB (input terminal shorted)
Tuner, Tape, Aux
: better than 112 dB (input terminal
shorted)
Filter
Characteristic:
Subsonic : 20 Hz (6 dB/oct); 40 Hz (6 dB/oct)
Loudness Control
Characteristic
Low Range: 100 Hz +9 dB
High Range: 10 kHz +5 dB
Power Source: AC 120 V at 60 Hz or AC 220 V at 50 Hz
Power Consumption:
215 W ( at Ac 120 V) or 445 W (at AC 220 V)
AC outlet (USA and
Canada)
Unswitched : 250 W max total
Unswitched : 250 W max total
Switched ; 100 W max
Dimensions (W x H x
D): 434 x 145 x 390 mm (17-5/64" x
5-45/64" x 15-23/64")
Weight: 16 kg (35,3 lbs)
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