High-Performance
Phono Equalizer: RIAA Equalization ±0,3 dB
When you
play improved phonograph records your amplifier must be able to handle a high
input level or suffer a degree of unpleasant distortion. The SA-6500 II employs
a high input voltage-resistant IC in the phono equalizer section in order to
avoid distortion. Its split power supply system (plus 21V, minus 19 V) steps up
the very large margin of Phono input level to 200 mV (1khz, T.H.D. 0,1%) at
input sensitivity of 2,5 mV. The result of this solid-stste sophistication is
unquestionably dependable performance. You hear all the dynamics and nuances of
the most highly engineered records with the least possible distortion.
Deviation from the RIAA equalization curve is only ±0,3 dB
Low-Distortion
Power Amplifier - Bass Fequencies Sweet and Clean
The many
refinements in the SA-6500 II include a constant-current load construction in
the pre-driver stage of the power amplifier. This helps eliminate a time
constant at low frequency so that sound quality remains unmuddied and sweet
over the whole audible spectrum. The constant-current load, by activating
negative feedback, assures that distortion is held to a minimum. The power
transistors thus operate well within their linear limitations for richer sound.
Power output is continuous 30 watts per channel, min. RMS at 8 ohms from 20 Hz
to 20,000 Hz , with no more than 0,1% total harmonic distortion. Further, this
practical power output is protected with a power supply using a large
transformer and a pair of 6,800 µF electrolytic capacitors for excellent
voltage regulation so that low-range dynamics never suffer power drain.
Power Protection Circuit - No On/Off Noise
Pioneer uses
both an electronic circuit with TRIAC (a bi-dirctional triode thyristor) and a
fuse circuit in the protection section of the
SA-6500 II. Thus the all-stage direct-coupled power circuit is never
endangered by irregularities, and the connected speakers never face the threat
of shorts. The protection circuitry also employs three transistors to eliminate
the unpleasant power on/off noise.
Tape
Monitor/Dubbing for Two Stereo Decks - two tape monitor switches on the front
panel give you easy control of two stereo tape decks for recording,
monitoring and dubbing from deck 1 to
deck 2.
Tone Control
Uses CR Circuitry; Low-Noise
Low-Distortion
The
two-transistor (PNP-NPN) tone control sectionof the pioneer SA-6500 II uses
select low-noise, low-distortion CR elements to expand dynamic range.
The CR
elements permit versatile tonal adjustments so that you can more precisely
match the acoustical properties of your listening room, and to allow you to get
the most out of your phono cartridge. The bass and Treble controls each have 11
click-stops for convenience. There is a Tone defeat switch which permits you to
cancel the tone controls at a touch (to "flat") without changing
their settings.
Loudness
Contour and Speaker Selector - a loudness contour is provided to compensate for low-level listening
drop-out in human hearing at lower and higher frequencies. The speaker selector
switch has Off for headphone listening. A or B or A+B two-pair stereo speaker
system selection.'
Specifications:
Amplifier
section
Circuitry; 1st stage differential amplifier
direct-coupled OCL
Continuous
Power Output:
30 watts per
channel, min. RMS at 8 Ω;
30 watts per
channel at 4 Ω from 20 - 20,000 Hz with no more than 0,15 T.H.D.
Total
Harmonic Distortion (20 -20,000 Hz feom Aux):
Continuous
rated power Output : no more than 0,1%
1 watt per
channel power output, 8 Ω : no more than
0,05%
15 watts per
channel power output 8 Ω : no more than
0,05%
Intermodulation
Distortion (50 Hz : 7,000 Hz = 4 : 1, from Aux):
Continuous
rated power Output : no more than 0,1%
1 watt per
channel power output, 8 Ω : no more than
0,05%
15 watts per
channel power output 8 Ω : no more than
0,05%
Output:
Speaker
: A, B, A + B
Headphones
: low impedance
Damping
Factor: 30 ( 20 - 20,000 Hz 8 Ω)
Input
Sensitivity/Impedance
Phono : 2,5 mV/50 k Ω
Tuner, Aux
: 150 mV/50 k Ω
Tape Play 1
and 2 : 150 mV/50 k Ω
Tape Play 2
(DIN) : 150 mV/50 k Ω
Phono
Overload level (T.H.D. 0,1%)
Phono : 200 mV 91 kHz)
Output
Level/ Impedance
Tape Rec 1
and 2 : 150 mV
Tape Rec 2
(DIN) : 30 mV/80 k Ω
Frequency
response
Phono (RIAA
equalization) : 20 to 20,000 Hz ±0,3 dB
Tuner, Aux,
Tape Play : 10 to 40,000 +0 dB -1 dB
Tone Control
Bass : +9 dB, -8 dB at 100 Hz
Treble
: +8 dB, -6 dB at 10 kHz
Loudness
Contour : +8 dB (100 Hz); +5 dB (10 kHz)
Hum and
Noise (IHF, short-circuited A network):
Phono : 72 dB
Tuner, Aux,
Tape Play : 93 dB
Semiconductors: 25 Transistors; 16 Diodes; 2 ICs
Power
Requirement: 110, 120, 220, 240 50/60 Hz
Power
Consumption; 300 watts (max.)
Dimensions
(W x H x D): 380 x 139 x 308 mm
(14-31/32" x 5-15/32" x 12-1/8")
Weight
(net): 7,6 kg (16 lb 12 oz)a