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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





Kenwood KA-550D amplifier

Features

Digital-ready power amplifier with excellent low-impedance drive capability

Dynamic Power Output (EIA) 2 x 90 W into 2 ohms

Ultra-short signal paths and circularised linear circuit layout to produce high-quality, high-definition sound especially for the UK market

Type monitor Source Direct position

Independent L/R channel volume control

Headphone Jack

 


Specifications

Power Output:  35 watts per channel minimum RMS, both channel driven at 8 Ω  from 20 - 20,000 Hz with no more than 0,08% Total Harmonic Distortion.

Maximum Continuous Power Output

DIN, 1 kHz, at 4 Ω  :  52 W + 52 W

DIN, 1 kHz, at 8 Ω  :  41 W + 41 W

IEC/NF, 63 Hz - 12,500 Hz, 0,7% T.H.D. at 8 Ω  :  40 W + 40 W

Total Harmonic Distortion : 

20 Hz - 20,000 Hz, 8 Ω  :  0,08%

1 kHz, 8 Ω  :  0,009%

Intermodulation Distortion:  0,03% at rtaed power (60 Hz : 7 kHz= 4 : 1)

Frequency Response:  10 Hz to 80 kHz +0 dB -3 dB (IHF)

Phono Frequency Response :  RIAA Standard curve ±0,4 dB (30 Hz to 20 kHz)

Damping Factor:  250 (50 Hz input 8 Ω )

Signal-to-Noise Ratio (IHF-A)

Phono (MM) :  76 dB

Tuner, Aux, CD :  82 dB

Tape :  82 dB

Signal-to-Noise Ratio at Unweighted, 50 mW Output (DIN)

Phono (MM) :  57 dB

Tuner, CD, Aux, Tape :  57 dB

Input Sensitivity/Impedance:

Phono (MM) :  2,5 mV / 47 k Ω

Tuner, CD, Aux, Tape :  150 mV / 47 k Ω

Phono Maximum Input Level (MM) :  150 mV, 0,08% T.H.D. at 1 kHz

Output Level Impedance:

Tape Rec :  150 mV / 220 Ω

Rec Out :  150 mV / 220 Ω

Channel Separation (DIN) at 1,000 Hz

Phono (Terminated with 2,2 k Ω ) :  64 dB

Aux (Terminated with 47 k Ω  +  250 pF) :  68 dB

Tone Controls

Treble :  ±10 dB at 10 kHz

Bass :  ±10 dB at 100 Hz

Phono Input Capacity :  320 pF

General

Power Requirements:  110, 120, 220 - 240 V 50/60 Hz

Pc :  150 W

Dimensions (W x H x D):  440 x 102 x 345 mm (17-5/16" x 4-1/16" x 13-9/16")

Weight:  6,8 kg (15,0 lbs)


 

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