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 KT-405 (1979)

Great black-on-silver styling that matches the Kenwood KT-413 Auto Search-and-Scan AM/FM Tuner. Advanced circuitry and professional controls complete this powerful amplifier.


HI-SPEED™ amplifier for faster transient response for unprecedented musical clarity and crispness.

55 watts per channel, min. RMS both channels driven at 8 ohms, 20Hz -20kHz, with less than 0,05% THD

Wide band frequency response down to 2Hz for full bass without phase distortion

Professional fast-acting peak power meters

Noise-free phono section: 83dB signal-to-noise ratio (5mV input)

Power Amp Direct switch for cleaner signal travel from pre-amp direct to power amp.

Two tape deck capability with tape copy either way.

MIC mixing with any source.

Connections for two pairs of speakers.


Power output: 55 + 55 watts into 8 ohms

Total harmonic distortion: 0.05%

Rise time: 1.4 μS

Slew rate: ±70 V/μS

Intermodulation distortion: 0,009% (at rated power)

Damping factor: 45 (20Hz-20kHz)

Frequency response: 2 Hz to 250 kHz

Speaker impedance: 4 to 16 ohms

Input sensitivity:

Phono MM: 5.0mV(Max. input 210mV)

Tuner, Aux, Tape: 150mV

Signal to noise ratio:

Phono MM: 83 dB

Tuner, Aux,Tape: 105 dB

Phono Frequency Response: ±0,4 dB (RIAA curve)

Dimensions (WxHxD): 400 x 139 x 296 mm (15¾ x 5¹⁵⁄₃₂ x 11²¹⁄₃₂ in)

Weight: 7.6kg (16,8 lbs)

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