In my living a 1978/79 (in my opinion Denon's heigh days) PMA-501 does a great job. It's a 13 kg heavy and beautifully built power pack, although it has officially just 50W p/c at 8 Ohm, but destroys many amps that boast with a lot more Watts. I love the sound of it. It has a certain amount of tube warmth and also great detailing and space in its sound and controls the speakers with a firm hand.
Superior building quality:
The specs:
Circuit system Differential amplification whole page direct connection
pure complimentary OCL circuit
Dynamic output (IHF) 160W (80W+80W, 8ohms)
Output power
(both channel drive, a sine wave continuation output)
20Hz - 20kHz 65W+65W (4ohms)
50W+50W (8ohms)
THD (Main in->SP out) 0.05% or less (at the time of an Output power)
0.02% or less (at the time of 1W output)
Cross modulation distortion
(60Hz:7kHz=4:1, Main in->SP out) 0.05% or less (at the time of an Output power)
0.02% or less (at the time of 1W output)
Output bandwidth (IHF, both ch(es) drive) 5Hz - 50kHz
Transmission frequency response 5Hz-100kHz+0 Less than [ -1dB ]
Input sensitivity/impedance 1Vrms / 50kohm±10% (20Hz - 20kHz)
Signal to noise ratio (IHF, A network, input short-circuit) 116dB or more
Output load impedance 0.16ohm or less
Output terminal Speaker AorB: 4ohms - 16ohms
Speaker A+B: 8ohm-16ohm
Headphone jack
<Preamplifier part>
Input sensitivity/impedance Phono: 2.5Vrms/50kohm
Tuner, Aux, Tape1, 2:150mVrms/85kohm
Phono maximum permissible input (Phono->Rec out) 230 or more (1kHz) mVrms
THD (1kHz) Phono->Rec out: Less than 0.008% (at the time of 3Vrms output)
0.1% or less (at the time of the maximum except take-off)
Aux->Pre out: Less than 0.008% (at the time of an Output power)
RIAA deflection 20Hz-20kHz±0.2dB
An Output voltage/impedance Pre out(more than load 50kohm): 1Vrms (rating), 10Vrms (maximum)
Rec out: More than 150mVrms/50kohm
Frequency response 5Hz-100kHz+0 -1dB (at the time of Tone defeat)
Tone control Bass: 50Hz±10dB
Treble: 20kHz±10dB
Filter characteristic Low: 20Hz, 6 dB/oct
Muting - 10, -20dB
<PCC section>
Maximum permissible input 14Vrms
After-cancellation phone cross talk Abbreviation-40dB
Transmission frequency response 5Hz-100kHz+0 -1 dB
<Synthesis>
Transmission frequency response (at the time of Tone defeat) Phono->SP out: 20Hz-20kHz±0.3dB
Aux->SP out: 5Hz-100kHz+0 -3dB
Signal to noise ratio (IHF, A network, an input short circuit) Phono: 76dB or more
Tuner, Aux, Tape1, 2:100dB or more
Cross talk (Phono->SP out) - 75dB or less (20Hz - 1kHz)
- 60dB or less (20kHz)
Power receptacle switched: Two lines, a total of 250W
unswitched: One line, 100W
In my study a PMA-560 has done a great job for a long time, but now it has become jobless because I bought one of my all and old time favorites: the Luxman L-505V. The PMA 560 is also a great amp but can't completely match with the pure quality build and specs of the 501.
Features :
• Power rating : 70 Watts at 8 ohms
• MM / MC phono vintage : 1990 model
• Loudness control
Specifications :
-:®:- Power rating : 70 Watts x 2 at 8ohms [ 20 - 20kHz ] at THD 0.015%
-:®:- DIN rating 1kHz at 4ohms : 110W
-:®:- Colour : Black
-:®:- Headphones jack : yes
-:®:- Speakers out : A, B, A+B speakers with front switching
-:®:- Adjustable Loudness
-:®:- Phono capable : front panel switching MM / MC moving magnet / moving coil
-:®:- Signal to noise ratio : 94 / 75dB [MM / MC], 110 dB [CD, tuner, Aux, tape1, tape2]
-:®:- Dimensions [ W x H x D ] : 434 x 140 x 353mm
-:®:- Weight : 7.7kg ~ 10kg packed