Fidelity-Research FRT-4 Specifications Fidelity Research

Fidelity-Research FRT-4
¥ 33,500 (Released in November 1973)
¥ 54,000 (around 1978)

Commentary

Step-up transformer for MC using toroidal transformer.

It incorporates a total of four toroidal cores to match the impedance of all commercially available MC-type cartridges.

3-point selection of input is possible.

Model Rating

Type

Booster transformer

Core format

Toroidal core

Input impedance

3 Ω, 10 Ω, 30 Ω, 100 Ω, PASS (Switching)

Load impedance

47k Ω ~ 57k Ω

Boost ratio

3 ohms :
10 ohms :
30 ohm :
100 ohms :

31.1 dB (35.84 times)
26.3 dB (20.68 times)
25.2 dB (18.27 times)
20.0 dB (10.55 times)

Frequency characteristic

20 Hz to 30 kHz

Distortion factor

Within measurement error range up to output voltage 2 Vrms

External dimensions

Width 170x Height 60x Depth 180 mm