Promote Mono Audio Amplifier KRELL KSA50 ClassA High Power 50W Mono Professional Power Amplifiers KSA50 Mono Speaker

Promote Mono Audio Amplifier KRELL KSA50 ClassA High Power 50W Mono Professional Power Amplifiers KSA50 Mono Speaker

Overview:
- This line is the force, KRELL KSA50 handed down generation of machine;Complementary differential input, America's top sound PASS the chief designer of Nelson PASS also say, KSA50 lines than the current 95% of HI - END amplifier well;Transistor 2 sc2240, 2 sa970 BD139, BD140, 2 sc5171 drive pipe, 2 sa1930 are imported, Toshiba, Hitachi, tube;Power amplifier fill tube for classic Toshiba name sc5200 2 + 2 sa1943;Buyers can also choose not to fill, choose other power tube, such as manufacturing, etc.;Different power tube sound power and the effect of different listening this as is known to all, buyers can try...

Technical parameters:
- Output power: 150W / 4ohm load; (Total harmonic distortion THD + N <0.3%), DC +-50V, 4 ohm load measured.
- Speaker Impedance: Available 4-8 ohms.
- PCB size: 138 * 56MM. Very small, suitable for connecting
- Power supply: DC Dual 18-50V transformer 200 watts or more, the need to replace withstand higher voltages higher capacitance.
- Discrete Tube: 2SA1943 2SC5200, classics on the tube(Actual delivery of boards).
This suite of lines from the force KRELL KSA50 handed down generation of machine.Complementary differential input.

Notice:
- A piece of circuit board is only one channel,Stereo need two pieces of current board
- Electricity must be installed before the radiator

Debugging steps:
- After completion of welding with good heat sink (note that the pipe and the heat sink should be insulated handle), adjusting VR2 (5 k precision is adjustable Resistance) makes the static current, about 50 ma VR2 counterclockwise static current, clockwise is reduced.Suggestions on electricity clockwise twist laps before!Safety!Don't put wrong resistor!
- Neutral zero, adjust VR1) (20 k closely adjustable resistance, make the output (OUT) of terminal ends (i.e., the power output)
Close to zero millivolt;
- Remember that the polarity of the dc voltage power supply end don't answer the reverse,the same to Audio input terminals

Product details:
- Resistance are 1% accuracy of metal film resistor (except 1 w as 5% accuracy and 5 w non-inductive resistor), the CBB capacitor used for philips CBB capacitance.
- The electrolytic capacitor kingbox, NOVER, LELON well-known capacitance, etc. Ensure the stability of the circuit, and noise to remove and clean.
- The audio source coupling capacitance choose German imports 1 uf horse capacitance, each channel to ensure that the small signal quality clean and clear.
- Black 3Pin is AC power input terminals: +V GND -V select Dual 18-50V DC voltage.
recommended dual 35V DC.
- PCB size:   56mm*138mm
- Power supply:DC double 18v to 35v,  recommend to use DC double 35V