TRIO KA-3006

Commentary

Stereo pre-main amplifier with high power design.

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.

TRIO's unique ASO detection type limiter protection is adopted.

DLOA (dual low-noise operational amplifier) is used for the equalizer stage and tone control circuit.
The DLOA consists of a first stage differential amplifier, a buffer, a third stage Class A drive and a pure complimentary service. This realizes a high dynamic range, high input impedance, high power utilization factor, low impedance and low distortion factor.
Shock noise is also suppressed because the DC current at the output terminal is 0 V.

Equipped with a low filter, high filter and -20dB muting circuit.

Equipped with a mode selector that allows you to choose between stereo and mono.

Equipped with 4 ch input / output terminal.

Model Rating

Type	Solid-state stereo premain amplifier
Power Amplifier Unit
Effective power	20 Hz to 20 kHz, both channel operation : 21W + 21W (8 Ω) 1 kHz Single channel operation : 37W/37W (4 Ω) 26W/26W (8 Ω) Both channel operation : 28W + 28W (4 Ω) 23W + 23W (8 Ω)
Music Power (IHF)	102W (4 Ω) 68W (8 Ω)
Total harmonic distortion factor (8 Ω)	0.5% (at rated output) 0.05% (Rated Output -3dB)
Cross modulation distortion factor	0.5% (at rated output) 0.08% (Rated Output -3dB)
Output Bandwidth (IHF)	10 Hz to 40 kHz
Residual noise (8 Ω)	0.5mV
Damping factor (8 Ω)	32
Optimum load impedance	4 Ω ~ 16 Ω
Preamplifier Section
Input Sensitivity / Impedance	Phono1, 2 : 2.5mV/50k Ω Tuner, Aux, Tape playA, B : 150mV/50k Ω 4 ch input : 150mV/50k Ω
Signal-to-noise ratio (IHF-A network)	Phono1, 2 : 82 dB (input 5 mV) Tuner, Aux, Tape PlayA, B : 90 dB 4ch input:90dB
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:140mV
Frequency characteristic	Tuner, Aux, and Tape play : 8 hz to 45 khz + 0 to 1.5 db Phono : RIAA deviation ± 0.5 dB
Tone control	Bass : ± 10 dB (100 Hz) Treble : ± 10 dB (10 kHz)
Filter	Low : 80 Hz, 6dB/oct. High : 7 kHz, 6dB/oct.
Loudness control (Volume-30dB)	+8dB(100Hz) +3dB(10kHz)
<General>
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)	55W
External dimensions	Width 435x Height 157x Depth 300 mm
Weight	10.5kg