1. Power parameters: One set: DC+- (35V-55V) Recommended+-45V (AC: Transformer 300W dual 32V, rectification board required)
Another group: single AC12V (note: each board is independently powered by a single AC12V power supply, that is, one board is powered by a single AC12V power supply)
2. Power: 300 watts (total harmonic distortion THD+N<0.1%), DC+-45V, 4 ohms
3. Measured under Class A 80W, 4 ohm load
4. Horn impedance: 4-8 ohms.
5. PCB size: 87 * 334MM.
Plate: 110 wide (including aluminum) * 334MM
6. First, adjust the differential input stage current to 2MA: adjust the VR1 (500R) adjustable resistor to make the voltage at C and D points 1.5-2V (i.e. the voltage at both ends of the R9 (1K) resistor); At this point, the input differential current is 1.5-2MA, which is a value of sound quality
7. The static current of the large tube is 100MA: Adjust the adjustable resistor VR2 (1K) to make the voltage between A and B points 22MV. At this time, the static current I=22MV/0.22R, which is 100MA; If the customer's heat sink is large enough, it can increase the static current, usually with a sound effect of 100MA-300MA.
8. Weight: 0.6KG+0.6KG