Trio (Kenwood) KA-9006 Stereo vahvistin 230V

Hyvässä kunnossa ja täysin ehjä vahvistin. Huollettu joulukuussa 2024. Paras Trion vahvistin 70 luvulla. Erittäin hyvä ääni.

Commentary.

This is a stereo pre-main amplifier which is the highest model and adopts all stages direct connection + pure complimentary service circuit.

The power amplifier consists of an all-stage direct-coupled circuit from the first stage to the last stage without the interstage coupling capacitor, a pure complimentary service circuit using the Darlington method of PNP-NPN for the output stage, and a ± 2 power supply system using the first stage differential-type.

As a result, various characteristics in the low frequency range have been thoroughly improved, and stable output has been obtained over the entire audible frequency range.

A limiter protection circuit is used to protect the transistors, and a relay is used to protect the speakers and prevent shock noise when the power is turned ON/OFF.

When the output terminal is short-circuited, the limiter level is lowered within 100m ・ sec to protect the transistor.

The equalizer uses a two power supply system in addition to the three stage direct connection system of the first stage differential circuit.

The tone control circuit is a two step switching type of the turnover frequency for both bass and treble.

The low filter is equipped with a subsonic filter and a rumble filter.

In addition, it has a high filter.

It has a two-stage switching muting mechanism and loudness control.

The impedance of Phono1 can be switched to two levels.

Equipped with a mode selector.

Since around 1975, carrying handles have been sold as a separately sold option.

Model Rating

Type Solid-state stereo premain amplifier

Power Amplifier Unit

Effective power

20 Hz to 20 kHz, both channel operation : 70W + 70W (8 Ω)

1 kHz Single channel operation : 110W/110W (4 Ω)

85W/85W (8 Ω)

Both channel operation : 95W + 95W (4 Ω)

73W + 73W (8 Ω)

Music Power (IHF) 300W (4 Ω)

200W (8 Ω)

Total harmonic distortion factor (8 Ω) 0.2% (at rated output)

0.05% (Rated Output -3dB)

Cross modulation distortion factor 0.2% (at rated output)

0.05% (Rated Output -3dB)

Output Bandwidth (IHF) 6 Hz to 45 kHz

Residual noise (8 Ω) 0.2mV

Damping factor (8 Ω) 30

Optimum load impedance 4 Ω ~ 16 Ω

Preamplifier Section

Input Sensitivity / Impedance Phono1, 2 : 2.5mV/30k Ω, 50k Ω

Tuner, Aux, Tape playA, B : 150mV/50k Ω

Mic : 2.5mV/50k Ω

4 ch input : 150mV/50k Ω

Signal-to-noise ratio (IHF-A network) Phono1, 2 : 84 dB (input 5 mV)

Tuner, Aux, Tape PlayA, B : 95 dB

4ch input:95dB

Output Level / Impedance Tape rec Pin : 150mV/50 Ω

Tape rec Din : 40mV/70k Ω

4 ch out : 150mV/50 Ω

Maximum Allowable Input (1 kHz, RMS) Phono:250mV

Frequency characteristic Tuner, Aux, Tape play : 10 hz to 20 khz + 0 to 0.5 db

Phono : RIAA deviation ± 0.5 dB

Tone control

Bass Turnover 200 Hz : + / - 10 dB (50 Hz)

Turnover 400 Hz : + / - 10 dB (100 Hz)

Treble Turnover 3 kHz : ± 10 dB (3 kHz)

Turnover 6 kHz : ± 10 dB (10 kHz)

Filter Low : 20, 40 Hz, 12dB/oct.

High : 7 kHz, 12 kHz, 6dB/oct.

Loudness control (Volume-30dB) +8dB(100Hz)

+3dB(10kHz)

AC outlet Power switch interlock : 2 systems

Power switch not linked : 1 system

Power supply voltage 100 VAC, 50Hz/60Hz

Rated power consumption (Electrical Appliance and Material Control Law) 170W

External dimensions Width 435x Height 157x Depth 300 mm

Weight 13.5kg