What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Pioneer SX-1500TD

 A Powerful Receiver of Tremendous power and Fidelity, Beautifully Packaged in the Most Up-to Date Design.
The SX-1500TD features highly advanced circuitry. An FET frong and ensures extremely sensitive FM reception. There are four IC's in the IF section for excellent selectivity, and a monolithic IC in the multiplex section for improved separation. Silicon transistors ensure low-noise music power of a tremendous 180 watts. In addition, a fine dynamic microphone comes with the SX-1500TD for microphone mixing. You can connect up to three different stereo loudspeaker systems. Uniquely attractive, with its silver and black contrast and polished rosewood end-pieces.

 Center Channel Output
The SX-1500TD has a center channel output on the rear panel, providing the composite signal (L+R) for a 3-D (three-dimensional) system, when you connect another amplifier to the center channel output.  In addition, stereo music can be recorded into a monophonic tape recorder with this output which is controlled by the preamplifier section of the SX-1500TD.
 Phono Inputs
The SX-1500TD has two sets of phono inputs, enabling you to compare cartridges. Phono 1 is for magnetic and ceramic cartridges, and Phono 2 is for magnetic cartridges.

AC Outlets
There are three AC outlets for turntables and tape decks used with the receiver, a switched AC outlet for 230 VA and two unswitched AC outlets for 230 VA.
FM Section
Circuity:  Front end using FET and 4-gang variable capacitor, IF amplifier using 4 IC's
Frequency Range:  87,5 to 108 MHz
IHF Usable Sensitivity:  1,7 µV
Capture Ratio:  0,7 dB 9at 98 MHz)
Image Rejection:  72 dB (at 98 MHz)
Selectivity:  40 dB (IHF rating)
Signal-to-Noise Ratio:  60 dB (IHF rating)
Antenna Input:  300 Ω (balanced)
Multiplex Section
Circuitry:  Time-switching type demodulator using IC, FM mono/stereo automatic selection
Channel Separation:  38 dB (at 1 kHz)
AM Section
Circuitry:  Superheterodyne
Frequency Range:  525 to 1605 kHz
IHF Usable Sensitivity:  18 µV
Image Rejection:  77 dB (at 1,000 kHz)
Antenna Input:  Built-in ferrite loopstick antenna
Audio Section
Circuitry:  Single-ended push-pull
Music Power Output:
180 watts total at 4 Ω (IHF rating)
145 watts total at 8 Ω (IHF rating)
Continuous Power Output (each channel driven): 
70 watts / 70 watts at 4 Ω;
58 watts / 58 watts at 8 Ω
Harmonic Distortion:  less than 0,5% 9at 1 kHz rated output)
Damping Factor:  50 at 8 Ω (at 1 kHz)
Frequency Response:  10 to 10,000 Hz ±2 dB
Power Bandwidth:  15 to 40,000 Hz  (Aux/IHF)
Hum and Noise (at rated output):
Mag :  better than 80 dB
Aux :  better than 100 dB
Inputs Sensitivit/Impedance (for rated output):
Magnetic Phono :  3,3 mV/50 k Ω
Ceramic Phono :  24 mV/100 k Ω
Microphone :  3,2 mV/30 k Ω
Tape Monitor :  200 mV/100 k Ω
Aux :  200 mV/100 k Ω
Main In :  480 mV/80 k Ω
Outputs Terminals and Jacks:
Speaker Impedance 4 to 8 Ω
Stereo Headphone jack
Simultaneous tape recording jacks, equipped with Tape Monitor switch
Tape Recording/Playback jack (DIN standard)
Pre-amplifier output jakcs
Center channel output jack
Equalization Curve:  Phono RIAA
Tone Controls (each channel): 
Bass :  boost 11 dB, out 16 dB at 50 Hz
Treble :  boost 10 dB, out 9 dB at 10 kHz
Low :  out 8 dB at 50 Hz
High :  out 6 dB at 10 kHz
Loudness Contour:  Switchable to On-Off, boost 12 dB at 50 Hz, boost 9 dB at 10 kHz, with Volume control set at -40 dB
Power Supply:  110, 117, 130, 220, 240 V (switchable), 50/60 Hz, 250  VA, 230 watts max
Dimensions (W x H x D):  459 x 145 x 369 mm (18-1/16" x 5-11/15" x 14-1/2")

Weight:  11,4 kg (25 lbs 2 oz) net

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