TRIO KA-1200

Commentary

A pre-main amplifier with enhanced functions and ease of use.

For the circuit configuration, a 2-stage direct-coupled preamplifier with low noise and high stability using a metal cancel transistor is adopted.
Durability has been improved by the adoption of metal canceler transistor and wire wrapping method.

It is equipped with click tone control, high-cut filter and loudness control.

Equipped with ASO detection electronic protection as a protection circuit.

Model Rating

Type	Pre-main amplifier
Main Amplifier Section
Effective power	Both channel operation : 14W + 14W (4 ω, 1 khz) 12W + 12W (8 ohm, 1 khz) Single channel operation : 18W/18W (4 Ω, 1 kHz) 14W/14W (8 Ω, 1 kHz)
Music Power (IHF)	42W (4 Ω) 30W (8 Ω)
Total harmonic distortion factor (8 Ω)	0.8% (at rated output) 0.2% (at rated output -3dB)
Intermodulation distortion factor (8 Ω)	0.8% (at rated output) 0.2% (at rated output -3dB)
Output Bandwidth Characteristics (IHF)	20 Hz to 30 kHz
Residual noise	1 mv (8 Ω)
Damping factor (1 kHz)	30 (8 Ω)
Optimum load impedance	Speaker : 4 Ω ~ 16 Ω Headphones : 4 Ω ~ 16 Ω
Preamplifier Section
Input Sensitivity / Impedance	Phono1, 2 : 2.5mV/50k Ω Tuner, Aux, Tape Play : 150mV/50k Ω
Signal-to-noise ratio	Phono1, 2 : 70 dB Tuner, Aux, Tape Play : 80 dB
Recording Output Level / Impedance	A Tape Play (Pin) : 150mV/110 Ω B Tape Play (Din) : 30mV/80k Ω
Phono maximum allowable input (1 kHz)	280mVp-p
Frequency characteristic	Aux, Tuner, Tape : 20 Hz to 40 kHz ± 2 dB
RIAA deviation	± 1 dB
Tone control	Bass : ± 10 dB (100 Hz) Treble : ± 10 dB (10 kHz)
High-cut filter	7 kHz, 6dB/oct.
Loudness control	100Hz:+8dB 10kHz:+3dB
<General>
Power supply voltage	100 VAC, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law)	39W
Power outlet	Power switch interlock : 1 system, 100W Power switch not linked : 1 system, 200W
External dimensions	Width 365x Height 117x Depth 263 mm
Weight	5.4kg