TRIO TW-61

Commentary

Solid state pre-main amplifier with rich functions.

The complimentary service circuit eliminates the transformer, which eliminates problems associated with transformer coupling such as low-range clipping distortion and high-range distortion.
In addition, the power transistor is protected by a protection circuit with repeated operation to check the safety of the circuit during operation.

Even when the selector switch is switched, a harsh click sound is not generated.

It is equipped with circuits such as low / high filter, mono output terminal, headphone terminal and loudness.

Model Rating

Type	Solid state stereo pre-main amplifier
Effective power	20W/20W (8 Ω, Strain 0.8%)
Music Power (Distortion 0.8%)	50W(25W+25W)
Frequency Response (AUX → Output Terminal, 1W)	20 Hz to 50 kHz ± 1 dB
Output band characteristics (distortion 1%, effective output)	18 Hz to 60 kHz -3dB
Distortion Factor (1 kHz)	0.8% or Less (Output 20W/20W) 0.5% or Less (Output 18W/18W) 0.15% or Less (Output 14W/14W) 0.15% or Less (Output 0.7W/0.7W)
Gain	MAG1, 2 : 2.0 mV Tape HD:2.5mV Tuner, AUX, Tape Play : 140 mv
Tone control	50 Hz : + / - 11 dB 10 kHz : ± 11 dB
Loudness control	+ 10 dB (100 Hz), + 5 dB (10 kHz)
Equalizer	MAG:RIAA Tape HD:NAB
Filter	Low Filter : 50 Hz, -5dB High Filter : 10 kHz, -6dB
SN ratio (volume maximum, tone control flat)	MAT, Tape HD : -65dB or more AUX, Tuner, Tape Play : -75dB or higher
Residual noise (minimum volume)	1.5 mV or less
Damping factor	23 (8 Ω) 46 (16 Ω)
Accessory circuit	Protection circuit Loudness control Headphone jack Mono output terminal Output Selector Tape monitor switch DIN standard recording and re-connector High filter Low filter Front panel recording / reswitch
Semiconductor used	Transistor : 19 Diode : 7 pcs
Power supply voltage	100 VAC / 117 V, 50Hz/60Hz
Power consumption	No signal : 20W Effective output : 90W
External dimensions	Width 330x Height 105x Depth 237 mm
Weight	5.9kg