FCO 300B

Dual mono pure class A Single Ended Amplifier

The amplifier FCO-300B is capable of reproducing music with speed, contrast, body and the life-like presentation of instruments. With this model, using the Single Ended configuration in pure class A, we managed to obtain the musicality we were looking for with dynamics, bass control and power output able to drive a broad range of speakers

The high quality of components used gave to the project a better resolution that reveal to the listener hears a life-like presentation of the musical performance.


  • Aluminium Knobs
    60mm CNC machined control knobs with integral soft light and laser etched indication segments.
  • DC Powered tube heater
    All tubes, have DC stabilised heater circuits to reduce hum noise to a near in-audible minimum.
  • Output transformer
    The Output transformer uses a double C-core Hi-Grade Iron-Silicon for superb frequency reproduction and bandwidth. With this newly designed custom output transformer unique to the FCO-300B we are able to achieving highly delicate and precise sound reproduction faithful to the original recording.
  • Mechanical construction of the frame.
    The power supply, choke and output transformers are resin cast in a metal case which provides the unit free from unwanted vibrations which further helps reduce unwanted noise at the tubes.
  • Remote control
    A superb CNC machined aluminium body with soft button design, perfectly matching the aesthetics for the "FCO" series.
  • Bias control
    The factory set fine bias control is microprocessor controlled to maintain the optimum settings. No adj are required when the power tube is changed.
  • Dual mono Circuitry
    A completely dual mono design minimises the crosstalk across channels. Power transformers use hi-grade iron silicon M0 and separate supplies with hi-grade selected capacitors to produce extremely low ripple levels. Independent to the mains transformer, each channel has a separate power supply guaranteeing a large reservoir of energy to meet the demands of the amplifier circuit and to maintain excellent interference immunity between channels.
  • Binding posts
    Gold plated professional binding posts for a continued oxidisation free connection further improve sound refinement.
  • Socket
    Gold plated ceramic sockets for a continued oxidisation free connection further improve sound refinement.
  • Components
    Components for the FCO-300B have been selected with great care throughout. Only the best available components are considered and all must undergo an exhaustive analysis of their sonic influence prior to final selection.
  • Selected tubes
    All tubes used are selected after 2 stage warm up. A fully computer monitored machine controls the process and at the end of this, selects the perfect tubes which are matched for a perfect balance.
  • Possibility to run the FCO-300B as “power amp”


Single Channel

Power stage


Input stage

1x 12AU7 – 1x 12AX7


1x 6CG7

Power supply

1x 5U4G

Power supply filter

CLC configuration

Tube filament

Electronic stabilized

Power transformer

Toroidal transformer Hi-Grade Iron Steel

Output transformer

Double C-Core transformer Hi-Grade Iron Steel

Output tap

4 ohm / 8 ohm 

Power stage configuration

Single Ended class A

Bias setting

Automatic Bias controlled by dedicated circuit

Power output (1KHz)

Distortion 1%: 8W@ 4/8 ohm
Distortion 3%: 10W @ 4/8 ohm

Frequency response

10Hz to 50KHz +- 1dB

Input impedance


Input sensitivity (Integrated)

250mV for rated power

Input sensitivity (Power amp)

250mV for rated power

Signal/Noise ratio

>90dB, A weighted

Inputs (line)

4 Balanced line input (XLR)
4 Unbalanced line input (RCA)
(switchable from front panel and remote control)

Integrated/Power amp

Modality switchable from front panel

Remote control

Volume, Mute, Inputs, Stby.

Finish (front panel)

Anodized Aluminum Silver

Finish (body)

Metal painted dark grey

Dimensions (w,d,h)



45 Kg

Line power

100-120V 60Hz
220-245V 50Hz

Power consumption

300W max

Remote control


Anodized black aluminium

Transmission type





Volume, mute


2 x CR2032



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