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HFA-1200 Stereo Power Amplifier

Model code: YB-HFA1200

Dual mono Class AB stereo stage, 120 W per channel, 220 damping factor and a completely passive cooling path.

Dual mono layout with an independent transformer per channel
Fully passive convection cooling, no fan noise
Balanced XLR and single ended RCA inputs with relay switching
Hand matched output devices, channel balance within 0.1 dB

List price€1,290.00

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Technical specifications

Output

Channels: 2
Amplifier class: Class AB
Power per channel at 8 Ohm: 120 W
Power per channel at 4 Ohm: 190 W
Bridged output: 380 W

Measured performance

THD + N: 0.005 %
Signal to noise ratio: 112 dB
Damping factor: 220
Frequency response: 5 Hz - 100 kHz (+0 / -1 dB)

Connectivity

Input sensitivity: 1.0 V for rated output (26 dB gain)
Input impedance: 47 kOhm unbalanced / 94 kOhm balanced
Inputs: 2x RCA, 1x XLR balanced, 1x 12 V trigger in
Outputs: A/B binding posts, 1x pre-out, 1x 12 V trigger out

Mechanical

Cooling: Passive convection, no fan
Protection: DC offset, over-temperature, short circuit, soft start
Rack height: 3 U
Dimensions: 440 x 145 x 380 mm
Net weight: 17.5 kg

Overview

HFA-1200 Stereo Power Amplifier

The HFA-1200 is a dual mono Class AB stereo power amplifier. Each channel has its own 500 VA toroidal transformer, its own rectifier bank and its own heatsink, so the two channels never share a ground return or a supply rail.

The input stage uses a low noise JFET differential pair followed by a relay switched resistor ladder, which keeps the signal path short and the noise floor at -112 dB. A slow start circuit limits inrush current and protects the output relays.

Every unit is burned in for 48 hours and measured before it leaves the factory. The measurement sheet is included in the box.