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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 SA-5500II amplifier

Popular Power Output Rating with Low Distortion Circuitry in Basically Beautiful Stereo Integrated Amplifier

Pioneer stays ahead in the creation of highly musical high fidelity components for all budgets. The SA-5500II is a popularly-priced stereo integrated amplifier which employs many of the same futuristic advances as found in our more expensive models. Its power output is ideal for small to medium-sized listening rooms; it delivers continuous 15 watts per channel, min. At 8 Ω , from 20 to 20,000 Hz, with no more than 0,5% T.H.D. its main volume control has 41 contact point with click-stop so that you can control the power output with precision. The tone control section employs CR elements to avoid noise and equalization error in Bass and Treble ranges. And other features like the tape monitor, two-system speaker selection and more make it truly useful for the stereo music fan.

 


Tone Control Amplifier with CR Elements

Pioneer's SA-5500II takes advantage of the many futuristic electronic developments featured in our larger and more expensive integrated amplifiers. An example is the precision tone control amplifier circuit. It uses high-grade CR type elements to avoid noise and distortion. The bass and Treble controls can be used to help you compensate for irregular acoustic in your listening room

Professional Feel for main Volume Control

The precision operation of the SA-5500II is evident even in the feel of the master volume control. It has 41 click stops, representing 41 contact  points, so that you can re-adjust the output level exactly when required.

Phono Equalizer Provides Less Distortion

Today's records contain a high degree of dynamic range and therefore must be equalized with precision for top musicality. The phono equalizer in the SA-5500II provides a very precise RIAA equalization so that dynamic range is preserved white noise and distortion are lessened.

Power Output Perfect for Musical Sound

Small to medium sized listening rooms don't always require high-powered amplifiers. In fact,, the 15 watts per channel output, of the SA-5500II is ideal for such rooms when you want top musicality . This power output is never affected by excess distortion or noise, thanks to Pioneer's advanced circuitry.

 


Other Features:

Loudness Contour to provide aurally flat-adjusted response at low volume

Tape Monitor for stereo tape deck

Two-System Speaker Selection System A or B or A + B

Three-Position Function Selector : Phono; Tuner; Aux

 


Specifications

Amplifier Section

Circuitry:  2-stage differential amplifier, direct-coupled OCL

Continuous Power Output:  15 watts per channel (min. At 8 Ω  from 20-20,00 Hz with no more than 0,5% T.H.D.)

Total Harmonic Distortion (20 - 20,000 Hz from Aux)

Continuous Rated Power Output :  No More than 0,5%

1 watt/ch. Power 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/ch. Power Output, 8 Ω  :  No more than 0,1%

Output speaker : A, B, A +B

Output Headphones:  Low impedance

Damping Factor:  30 (20 Hz - 20 kHz, 8 Ω )

Input Sensitivity/Impedance

Phono :  2,5 mV/50 K Ω

Tuner :  150 mV/50 K Ω

Aux :  150 mV/50 K Ω

Tape Play :  150 mV/50 K Ω

Phono Overload Level (T.H.D. 0,3%)

Phono :  130 mV (1 kHz)

Output Level/Impedance

Tape Rec :  150 mV

Frequency Response

Phono (RIAA Equalization):  20 to 20,000 Hz ±0,5 dB

Tuner, Aux, Tape Play :  20 to 20,000 Hz ±1 dB

Tone Control

Bass :  ±7 dB at 100 Hz

Treble :  ±7 dB at 10 kHz

Loudness Contour:  +6 dB at 100 Hz (Vol. Control set at -40 dB position)

Hum and Noise (IHF, short-circuited A network)

Phono :  71 dB

Tuner, Aux, Tape Play :  87 dB

Semiconductors:  2 ICs; 7 Transistors; 7 Diodes

General

Power Supply:  120 V, 60 Hz

Pc :  70 watts (UL), 100VA (CSA)

Dimensions (W x H x D):  380 x 124 x 269 mm (14-31/32" x 4-7/8" x 10-19/32")

Weight:  5,2 kg (10 lb 13 oz)


 

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