Class AB amplifier board 300W+300W KRELL FKSA50 ON MJ15024 / 15025 Power tube + MJE15033/ 15032 Push tube Pure After level

parameter:

Weight: net weight 1.2KG / pcs

Single chip size: 280MM X 100MM X 42MM high (refer to the picture below)

Output power: 300W+300W 4-8 ohms

Frequency response: 20HZ-20KHZ

Harmonic distortion: 0.01%

Magnification 25 times

Supply voltage: main voltage DC double 25-65V (recommended with double 40-50V or so) to add power rectifier board

  Protection circuit AC single 12-18V (to be independently powered, can not be shared)

Features:

FKS50 reference odd L force circuit redesigned layout, optimized, and its sound color, while making its performance more stable. Suitable for high-fidelity home HIFI class, full of power, clear and powerful sound quality, pure, clear and delicate sound!

Signal amplification with audio tubes A92 A42 and 546 556; push level imported original MJE15033 15032; power amplifier with imported Anson MJ15024 MJ15025 gold sealed tube, three pairs of parallel output per channel, dynamic, fine tone, parallel output, Can make the output current double, the thrust is full, enough

Optimized circuit design, integrated switch output delay protection, midpoint voltage protection, overload protection, high overall noise ratio

Supply voltage range: reliable operation in DC dual 30V-65V

(Recommended working voltage DC is about 45 volts, the transformer's foot power is more than 400W, the left and right are independent, of course, the transformer can be bigger and better.) The transformer power is very important when enjoying large dynamic music. It allows you to truly understand what is shocking and what is the sense of the scene.

The line operates from a voltage range of DC +/- 30 to 65 V and works reliably and reliably. However, the high voltage used in the production of a Class A machine means that the heat will be larger, so the recommended voltage is DC +/- 40- It can be used within 50V. It is recommended that the left and right channels be powered separately. The power of each channel is more than 400W. Of course, the two-channel shared power supply is also possible, but the power of the cow must be greater than 800W to get good results. (Protection of protection circuit Power supply cannot be shared)

Regarding the quiescent current, the quiescent current has a direct relationship with the temperature. The higher the current, the higher the temperature. The current of each quiescent current has been adjusted to about 200MA before shipment, but the temperature rise is different because of the different heat sinks used. Therefore, the quiescent current may be different from the value I adjusted. The quiescent current can be adjusted according to the actual situation. It is better if the surface temperature of the tube does not exceed 60 degrees.

It is recommended to use AC double 30-35V ring cattle transformer (400W or more) for independent power supply, and then use the rectified power board for protection. The protection circuit needs separate power supply (AC 12-18V must use separate winding, can not be shared with others).

The quiescent current is adjusted to about 200MA per piece during shipment.