SONY TA-1120A

Commentary

A pre-main amplifier with improved performance based on the TA 1120.

Silicon transistors that are resistant to temperature and have good high-frequency characteristics are used in all stages.
At that time, Sony's catalog called for a permanent warranty for this transistor.

A quasi complimentary service SEPPP OTL circuit is used for the power amplifier circuit.

It features a lever-operated quick-access switch that allows you to choose between your regular Tuner and Phono1 at the touch of a button.
If you preset the other inputs with the selector, you can select three inputs with the lever.

Equipped with low filter and high filter.

Equipped with 2-dB step tone control.
The tone control circuit has a tone cancel switch that allows the knob to be flat in any position.

The preamp section and main amplifier section can be used independently.

As an option to be sold separately, there were a wood case with Eurasian cheek finish and a mount metal case.

Model Rating

Type	All-silicon transistor stereo premain amplifier
Circuit system	Quasi complimentary service SEPPP OTL circuit
Power Amplifier Unit
Output	Non-clip music Power : 160W (8 Ω, both channel operation) Music Power (IHF) : 60W + 60W (8 Ω, both channel operation) Rated output : 60W + 60W ± 0.5 db (4 Ω) 50W + 50W ± 0.5 db (8 Ω) 35W + 35W ± 0.5 db (16 Ω)
Harmonic distortion factor	1kHz: 0.05% or Less (at Rated Output) 0.01% or Less (at 10W Output) 20 Hz to 15 kHz : 0.1% or Less (at Rated Output) 0.06% or Less (at 25W output) 0.03% or less (at 500 mW output)
Cross modulation distortion factor (SMPTE standard 60Hz:7kHz=4:1)	0.2% or Less (Rated Output) 0.05% or Less (at 25W Output) 0.02% or Less (at 10W Output)
Frequency characteristic	7 Hz ~ 180 kHz + 0 -1dB (at Rated Output)
S/N ratio (IHF standard Closed circuit)	110 dB or more * Measured by Waiting Network A of IFF-a- 201 (1966)
Input impedance	100k Ω or more
Damping factor (1 kHz)	180 or More (8 Ω) 360 or More (16 Ω)
Sensitivity	1 V (at 50W output)
Residual noise	0.1 μ W or Less (8 Ω)
Preamplifier Section
Output	Pre-out : 2V/10k Ω Headphone : 6V/10k Ω Rec out:150mV
Harmonic distortion factor (at rated output)	Tuner, Aux, Tape : 0.03% or less Mic : ≤ 0.05% Tape head : 0.05% or less Phono1/2 : 0.05% or less * Mic, Tape head and Phono1/2 are measured at input terminals 38 db higher than the maximum sensitivity.
Cross modulation distortion factor (60Hz:7kHz=4:1)	Tuner, Aux, Tape : 0.1% or less Mic : ≤ 0.1% Tape head : 0.1% or less Phono1/2 : 0.1% or less * Mic, Tape head and Phono1/2 are measured at input terminals 38 db higher than the maximum sensitivity.
Frequency characteristic	Tuner, Aux, Tape : 10 Hz to 100 kHz + 0 -2dB Phono1/2 : deviation from RIAA curve within 0.5 dB Tape head : Deviation from NAB curve within 0.5 dB * Adjustable by + 4-1dB at 10 kHz Mic : 10 Hz to 30 kHz + 0 -2dB
Sensitivity	Tuner, Aux : 150mV/100k Ω (adjustable with semi-fixed resistance) Tape : 150mV/100k Ω Phono1/2 : 1.2mV/47k Ω Tape Head : 1.2mV/500k Ω Mic : 1.2mV/500k Ω
Maximum Undistorted Allowable Input (1 kHz)	Phono1/2:100mV Tape head:100mV Mic:100mV
Signal-to-noise ratio	Aux, Tuner : 90 dB or more Phono1/2 : 70 dB or more Tape head : 70 dB or more Mic : 65 dB or more * Measured by Waiting Network A of IFF-a- 201 (1966)
Bottom adjusting part	Tape head equalizer adjustment screw (semi-fixed type)
Recording and reconnector	Rec/PB : input sensitivity 0.5 V, output level 25 mV
Tone control	Bass : 100 Hz ± 10 dB Treble : 10 kHz ± 10 dB (2 dB Step 11-Stage Switching)
Filter	Low Filter : 50 Hz or less, 12dB/oct. High Filter : 9 kHz or higher, 12dB/oct.
<General>
Semiconductor used	Transistor (46 pcs) 2SC401 : 25 2SC293 : 8 2SA527 : 2 2SC318 : 3 2SD45 : 8 Diode (23 pcs) DS2M : 4 pcs 1T22 : 2 SV-03 : 2 SV-05 : 4 SV-31 : 10 1S332 : 1
Pwer	100 VAC (Switchable to 117 V, 220 V, 240 V) ± 10%, 50Hz/60Hz
Power outlet	Power switch interlock : 2 systems Power switch not linked : 1 system
Power consumption	No signal : about 40W Rated output : approximately 260W
External dimensions	Width 400x Height 145x Depth 310 mm
Weight	Approximately 11 kg
Attachment	Short plug Pin plug Connection code Silicon cloth 5A fuse
Sold Separately	Eurasian Cheek Finish Wood Case TAC-1 (¥ 4,600) Mounting Bracket MB-5 (¥ 2,800)