Reference One power MK3 amplifier

Reference One Power MK3 Mono Block Power Amplifier

Audio Experience Reference One MK3 Mono Block Power Amplifier is a Class AB1 PP design power amplifier. It provides sound deep and wide stage, accompanies with reality sound image and a emotions sound presentation.

It uses two matched pair of Tung-Sol KT150 power tubes and Class AB1 UL PP working status to provide 160W adequate output for most of the Hi-End Speakers to ideal performance. Moreover, the high quality output transformer combines with high performance Class AB UL PP circuit design lead to an extremely low loss, wide sequence sound effect and excellent phases output. This power amplifier case structure and parts arrangement are perfect, the signal path is directly and shortly connected. Great heat dissipation, an anti-shock and anti-RF function to guarantee it works at a very stable status. For sure, this machine is produced by point-to-point methodology.

Features

The new design input stage is 12AU7 direct coupling to 5687WB driver stage to 6H30 cathode follow driver stage , The driver stage uses coupling cap to KT150 power tube , The KT150 work at Class AB1 UL P-P mode to driver Hasimoto output transformer , The Hasimoto special grade CUT CORE orient high B output transformer has very low Insertion Loss 0.15dB 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 power supply with two separately HVB+ power supply for power output stage and input driver stage.

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

The two power transformer is R-Core transformer.
The output transformer is Hasimoto special grade CUT CORE orient high B.wide frequency range , low distortion , low phase shift , good damping factor
The Choke is Poshan (Kong Kong) Z11 EI Choke .
The power supply with two separately HVB+ power supply for power output stage and input driver stage.
The new design input driver stage
The input transformer for balanced (XLR) input is Jensen (made in USA )
All coupling cap use M-CAP® Supreme Silver / Gold & Oil coupling cap
The speaker and RCA connections is Cardas
The inside wire have uses IN-AKUSTIK and Sommer cable

Hasimoto special grade CUT CORE orient high B output transformer.

The power supply with two separately HVB+ power supply for power output stage and input driver stage.

M-CAP® Supreme Silver / Gold & Oil coupling cap

Specifications

Output and T.H.D :
1W , 1kHz total harmonic distortion typically 0.06% (20Hz 0.07%, 20KHz 0.08%)
160W 1kHz total harmonic distortion typically 1.9% (30Hz 3%, 20KHz 2.5%)(rated output)

Max: 230W

Input : RCA and XLR

Input Impedance : 100K ohm is RCA, 10K ohm is XLR .

Frequency Response:
1W 20Hz ~ 100KHz ( 20Hz 0dB, 100KHZ 0dB)
160W 20Hz ~ 100kHz (20Hz -1dB , 100kHz -2.6dB)

Noise: Less than 0.5mV

Input Sensitivity: 1.8V RMS rated output (160W) 27.8dB Gain ( Test at 8 ohm )

Output Taps: 4 ohm , 8 ohm , 16 ohm.

Damping factor : approximately 36

Tubes Required for each black: (4) two matched pair KT150 Power Output , ( 1 ) 6H30 Driver, ( 1 ) 5687WB Driver , ( 1 )12AU7 Input .

Phase Mode : Normal

Dimension: 300mm x 438mm x 233mm (W x D x H) each

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

Actual Price: HK$58,800 one pair.

YS-Audio
Room1308, 13/F,BLK C,.
Kai Tak FTY BLDG.
99-101 King Fuk ST,.
San Po Kong,   KLN,.
Hong Kong
Tel:(852)93440168
E-mail : info@ys-audio.com
WhatsApp: 93440168
facebook : https://www.facebook.com/AudioExperienceYSaudio/