R-1 power amplifier

Reference one Mono Block Power Amplifier

Retired Product

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

It uses one matched pair of KT120 power tubes and UL working status to provide 86W adequate output for most of the Hi-End Speakers to ideal performance. Moreover, the high quality output transformer combines with high performance full balanced 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 full balanced input stage is 12AT7 direct coupling to 12AU7 full balanced driver stage , The driver stage use high quality capacitors to KT120 power tube , The KT120 work at P-P mode to driver Tango output transformer , The Tango FC-120-5 output transformer has very low Insertion Loss 0.18dB 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.

The use high quality transformers .

The power transformer is special audio R-core transformer , high current , low noise .
Tango LC grade choke.
The output transformer is Tango FC-120-5
wide frequency range , low distortion , low phase shift , good damping factor .

Tango FC-120-5

Specifications

Output : Output :
1W per channel , 1kHz total harmonic distortion typically 0.05% (0.1% at 20Hz , 0.2% at 20KHz)
90W per channel , 1kHz total harmonic distortion typically 1.5%

Input : Balanced ( XLR ) x 1

Input Impedance : 100K ohm

Frequency Response:
1W 20Hz ~ 40KHz ( 20Hz -0.1dB, 40KHZ -3dB)
90W 20Hz ~ 40kHz (20Hz -0.1dB , 40kHz -3dB)

Noise: Less than 0.5mV

Input Sensitivity: 1.2V RMS rated output.

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

Damping factor : approximately 28

Tubes Required for each black: ( 2 ) Matched pair KT120 Power Output , ( 1 ) 12AU7 Driver , ( 1 )12AT7 Input .

Phase Mode : Normal

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

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

with TUNG-SOL KT120 power tubes.

Retired Product

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
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