SONY TA-F40

Commentary

This is a pre-main amplifier developed by applying the technology obtained from the development of a high-grade amplifier.

It is said that straight transmission by heat pipe is realized.
A heat pipe with a thermal conductivity several hundred times that of a copper rod is used to dissipate heat. This eliminates the need to use lead wires to connect the transistor to the circuit board and prevents electromagnetic waves from being emitted from the lead wires.

Pulse power supply is used for the power supply part.
The pulse power supply instantly turns 100 VAC into DC, preventing 50Hz/60Hz AC magnetic field, contributing to the non-fluxing of the amplifier. In addition, the voltage fluctuation corresponding to the change of the signal is suppressed, and the signal can flow directly electrically.

The Hi-f power transistor is based on Sony's proprietary semiconductor engineering._TTransistor is used.
Since this transistor has excellent high-speed response characteristics, dynamic distortion such as transient intermodulation distortion can be suppressed with a simple circuit, preventing the adverse effect on sound quality caused by the complication of the circuit.

MC cartridge direct input is possible.

Equipped with self-defeat tone control and a loudness switch.

Uses a gold plated phono terminal.

Model Rating

Type	Stereo pre-main amplifier
Output (20 Hz to 20 kHz, both channels driven)	50W + 50W (8 Ω)
Harmonic distortion factor (at effective output)	0.01% (20 Hz to 20 kHz)
Signal-to-noise ratio	Phono MM:88dB Phono MC:75dB
Damping factor	50
Power consumption	77W
External dimensions	Width 430x Height 80x Depth 335 mm
Weight	4.2kg