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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





Accuphase M-60


The Accuphase Monophonic Power Amplifier Model M-60 was completed after extensive engineering efforts in which perfection was sought without compromises. Monophonic design was chosen to completely eliminate any possibility of inter-channel interferences from power supply circuit and wirings, and also to feature a handy weight so that it can be handled even by one person. The M-60 provides 19" rack mounting facilities and a cannon type input terminal for studio monitor or PA system applications.

Features:
Monophonic Design Advantage for No Inter-Channel Interference
Every Stage Push-Pull Driven for Greatly Improved Stability, Linearity and Dynamic Range
Heavy Duty, large Energy Power Supply
Logarithmic Scale Peak level Output Meter
Subsonic Filter to Eliminate Noise below Audible Range
1 dB step Attenuator
Cannon Type Input Connector
Provision for Ventilation Fan Installation

Specifications
Power Output (from 20Hz to 20 kHz, 0,1% THD):
450 watts, min. RMS at 4 ohms,
300 watts,min. RMS at 8 ohms,
150 watts, min.RMS at 16 ohms
THD (from 20 Hz to 20 kHz at any power output from 1/4 watt to rated power):
4 ohms; 0,1% max.
8 ohms; 0,1% max.
16 ohms; 0,1% max.
Intermodulation Distortion: 0,1% at rated power output (for any combination of frequencies between 20 Hz and 20 kHz)
Frequency Response:
20 Hz - 20,000 Hz; +0, -0,2 dB at rated power output
2 Hz - 90,000 Hz; +0, -3 dB at rated power output
Damping Factor: 45 (at 8 ohms load, 20 - 20,000 Hz)
Rise Time: 3 μSec.
Slewing rate: 25 V/μSec.
Input Sensitivity and Impedance: (2,0 Volts, 100 kohms, for rated output at the max. level control)
Hum and Noise: 100 dB below rated output
Output Load Impedance: 4,8 and 16 ohms
Subsonic Filter: cutoff frequency 17 Hz, 18 dB/oct.
Power Level Meter: switchable for Volume Level and Peak level, calibrated to read 0 dB - 300 watts into 8 ohms load and capable of directly reading down to -50 dB (3 mW)
Attenuator: precision, 1 dB stepping type
Power Requirement: 100, 117, 220, 240 V, 50/60 Hz
Power Consumption: 65 watts at zero signal output;
540 watts at rated otput (8 ohms load)
800 watts at rated output (4 ohms load)
Semiconductor Complement: 47 transistors, 51 diodes, 3 IC's
Dimensions (W x H x D): 482 x 170 x 345 mm (19" x 16-11/16" x 13-9/16")
Weight net: 27 kg (59,4 lbs)
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