Reference 300B-P3 Mono Block 300B Class A Balanced Push-Pull Power Amplifier

Audio Experience Reference 300B-P3 is mono block Valve Tube Power Amplifier.

It uses one matched pair of Electro-Harmonix 300B power tubes and PP Class A working status to provide RMS 20W adequate output for most of the Hi-End Speakers to ideal performance. Moreover, It use the high quality output transformer ( Hasimoto made in Japan).
Huge dynamic range, both the beautiful tone color and wonderful rhythm , ultra linear circuit of the valve tubs power amplifier designed for the DVD - Audio and SACD source in the New Century. uncanny natural flowing heart-stirring sound that matches any other ultra-Fi products on the market .

Features

It is full balanced design (just balanced input , not RCA input ), the input stage is 12AT7 direct coupling to 12AU7 driver stage , The driver stage use high quality capacitors to 300B power tube , The 300B work at P-P Class A mode to driver Hasimoto HW-40-5 high quality output transformer , The HW-40-5 CUT CORE orient high B output transformer has very low Insertion Loss 0.2dB only. ( Many tube power amplifier in Hi-End audio market , Their have the output transformers is over 1dB Insertion Loss . only about 10% very high price tube amplifier use under 1dB Insertion Loss of output transformer ) . The output transformer has low insertion loss is very important , the best of the best is 0 dB Insertion Loss , The output transformers for High End tube amplifier need under 1dB Insertion Loss . The Insertion Loss over 1.5dB output transformer will lost many low level music.

The components , NFB value , tube type , circuit all select by listen test.

Features

The power transformer is R-Core transformer
The output transformer is Hasimoto HW-40-5 CUT CORE orient high B output transformer , made in Japan
Full balanced design.
All coupling cap use Sonicap
The power caps is Mallory (made in USA )

The info of Hasimoto HW-40-5 CUT CORE orient high B output transformer.

Specifications

Output :
1W per channel , 1kHz total harmonic distortion typically 0.25%(0.3% at 20Hz , 0.3% at 20KHz)
20W per channel , 1kHz total harmonic distortion typically 2%

Input : XLR ( NOT RCA )

Input Impedance : 200K ohm

Frequency Response:

1W 20Hz ~ 70KHz ( 20Hz 0.1dB, 70KHZ -3dB)
20W 20Hz ~ 55kHz (20Hz -0.5dB , 55kHz -3dB)

Input Sensitivity : 0.76V / 20W

Damping factor : approximately over 10

Noise: Less than 1mV

Output impedance : 4 ohm / 8 ohm / 16 ohm

Tubes Required: One Matched pair 300B Power Output , One 12AU7 Driver , One 12AT7 Input

Phase Mode : Normal

Dimension: 320mm x 438mm x 233mm (W x D x H) each

Power Source: 110-117/220-240V, 50/60Hz

Actual Price: HK$26,530.

YS-Audio
Room1308, 13/F,BLK C,.
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99-101 King Fuk ST,.
San Po Kong,   KLN,.
Hong Kong
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