Amplifier module of increased power, high level and Premium quality. The amplifier is designed specifically for "sophisticated" lovers of high-quality audio using field-effect transistors also for audio.
Simple circuitry, using the so-called "current mirror" in the preliminary differential stage, allows you to minimize distortion and unconditionally bypass all microcircuit amplifiers in sound quality.
The amplifier is assembled with 2 pairs of output FETs specially designed for audio 2SK1058 and 2SJ162 HITACHI / RENESAS
In the signal circuits of the Premium version, unlike the usual version, the following are used:
- BC546/BC556 Philips Driver Transistors Vintage Silver Face
- WIMA polypropylene film capacitors, MKP series
- Metal Film Resistors Vishay Beyschlag MBB0207
The module does not require any configuration and is ready to work out of the box, since these devices (transistors) are equipped with internal thermal stabilization elements. The quiescent current of the output transistors of this module is set at the optimum level of 120mA. The module requires high precision drilling of holes, since the holes on the radiator must completely match the holes on the printed circuit board of the module, at the same time, this solution significantly saves space in the case and allows you to move the amplifier as far as possible from sources of electronic interference.
When using 8 ohm acoustics, the supply voltage can be raised to 55-60V to obtain the equivalent power at 4 ohms.
For passive cooling at a supply voltage close to the maximum, a radiator of at least 2000 sq. cm is required
Subjectively, the amplifier has a high power and at the same time a very pleasant sound with crystal clear highs and moderately pronounced mids.
The module can be recommended for building a high-quality power amplifier