Medium-Power
Stereo receiver with FET FM Front End, PLL MPX, Precision Equalizer and High
S/N Differential OCL Power Amplifier.
Can your
musical needs truly be met by a stereo receiver with as little RMS power output
as 15 watts per channel? They can if you put your trust in the Pioneer SX-450.
if your listening room is of average size, if your budget is modest, and if
clean, low-distortion musical reproduction is your goal, the SX-450 is the
medum-powered stereo receiver for you. Its solid stereo FM/AM section includes
a PLL multiplex IC for wide and stable stereo FM separation. There's a
low-noise FET coupled with a frequency-linear 3-gang variable capacitor to
increase FM sensitivity, a 5-stage limiter to eliminate AM noise, and a special
integrated circuit to improve AM tonal Quality. The phono equalizer features a
big low 0,1% distortion, and the tone control section is of the CR type to
permit super-quiet handling of all tonal adjustments.
Continuous
power output of 15 watts min. RMS, at 8 ohms, 20 to 20,000 Hz with no more than 0,5% total harmonic
distortion. All things considered, this is an unusually good buy in stereo -
the SX-450 from Pioneer.
Specifications
Power
Amplifier Section
Continuous
Power Output (both channel driven, 20-20,000Hz): 15 watts per channel at 8 Ω
Total
Harmonic Distortion (20 Hz to 20 kHz, from Aux)
Continuous
Rated Power Output: no more than 0,5%
1 watt
per channel output, 8 Ω: no more than 0,1%
Intermodulation
Distortion (50 Hz : 7 kHz = 4:1 from Aux)
Continuous
Rated Power Output: no more than 0,5%
1 watt
per channel output, 8 Ω: no more than 0,1%
Damping
Factor (20 Hz-20 kHz): 25
Input
Sensitivity/Impedance
Phono
: 2,5 mV/50 k Ω
Mic :
7,5 mV/50 k Ω
Aux :
150 mV/50 k Ω
Tape
Play : 150 mV/50 k Ω
Tape
Play (DIN) : 150 mV/50 k Ω
Phono
Overload level (THD 0,1%): 150 mV (1
kHz)
Output
Level/Impedance
Tape Rec :
150 mV
Tape
Rec (DIN) : 30 mV/80 k Ω
Speaker : A,
B, A+B
Headphone :
Low Impedance
Frequency
Response:
Phone (RIAA
equalization) : 30 Hz to 15,000 Hz +0,5 -1 dB
Aux, Tape
Play : 20 Hz to 60,000 Hz ±1 dB
Tone Control
Bass : +10
dB, -9 dB (at 100 Hz)
Treble : +9
dB, -10 dB (at 10 kHz)
Loudness
Contur (Volume Control at -40 dB): +6 dB
(100 Hz); +3 dB (10 kHz)
Hum and
Noise (IHF, short-circuited, A network, rated power)
Phono : 70
dB
Aux, Tape
Play : 90 dB
FM Section
Usable
Sensitivity [Mono/Stereo]: 11,2 dBf (2,0
µV) / 20,0 dBf (5,5 µV)
50 dB
Quieting Sensitivity [Mono/Stereo]: 18,3
dBf/(4,5 µV) / 39,2 dBf (50 µV)
Signal-to-Noise
Ratio at 65 dBf [Mono/Stereo]: 70 dB/ 65
dB
Distortion
at 65 dBf
100 Hz
[Mono/Stereo] : 0,15% / 0,3%
1 kHz
[Mono/Stereo] : 0,15% / 0,3%
6 kHz
[Mono/Stereo] : 0,4% / 0,4%
Frequency
Response: 30 Hz to 15,000 Hz +0,2 -2,0 dB
Capture
Ratio: 1,0 dB
Alternate
Channel Selectivity: 60 dB
Spurious
response Ratio: 75 dB
Image
response Ratio: 65 dB
IF Response
ratio: 85 dB
AM
Suppression ratio: 50 dB
Muting
Threshold: 14 dBf (2,8 µV)
Stereo
Separation: 40 dB (1 kHz), 30 dB (30 Hz
- 15 kHz)
Subcarrier
Product ratio: 40 dB
SCA
Rejection Ratio: 40 dB
Antenna
Input: 300 ohms balanced / 75 ohms
unbalanced
AM Section
Sensitivity
IHF [ferrite /external antenna]: 300
µV/m / 15 µV
Selectivity: 35 dB
Signal-to-Noise
Ratio: 50 dB
Image
Rejection: 40 dB
IF
rejection: 65 dB
Antenna: Built-in Ferite Loopstick Antenna
Miscellaneous
Semiconductors: 1 FET; 3 ICs; 28 Transistors; 15 Diodes
Power
Requirements: 110 -120 V, 220-240
V, 50/60 Hz
Power
Consumption: UL; 70 W, 130 W (max); CSA;
120 VA
Dimensions
(W x H x D): 448 x 141 x 307 mm (17-4/8
x 5-9/16 x 12-1/16 inches)
Weight: 8,6 kg (19 lb) net