Benchmark HPA4 High Resolution Headphone Preamp
Hailed as the world’s Ultimate Line Amplifier, HPA4 is the product of a collaboration between Benchmark Media Systems and THX Ltd.
£3749.00 inc VAT
IN STOCK
IN STOCK
SKU BM-HPA4/B
- THX-888 (AAA™) Headphone Amplifier
- Benchmark Line Amplifier
- 256-Step Fully-Balanced Relay Gain Control, 0.5 dB Steps
- Precision Timed Relay Closures
- Precision Metal Film Resistors
- Gold-Contact Relays
- Balanced and Unbalanced I/O
- 6 Watts into 16 Ohm Headphones
- 11.5 Vrms into 300 Ohm Headphones
- Short-Circuit Protection
- DC Protection
- Over-Voltage and Over-Current Protection
- Thermal Protection
- Touch Screen Control
- IR Remote Control (optional)
- 2 Balanced Stereo Line Inputs
- 2 Unbalanced Stereo Line Inputs
- 1 Balanced Stereo Line Output
- 1 Unbalanced Stereo Line Output
- 1 Balanced Mono Sum Output
- 2 Bidirectional 12V Trigger Ports
It is the first headphone and line amplifier to feature THX’s Achromatic Audio Amplification technology (or AAA) and reduces harmonic/intermodulation/crossover distortion by up to 40dB. The reduction is achieved by utilising a patented feed-forward topology which nullifies conventional distortion and noise mechanisms.
With HPA4, Benchmark and THX have produced a headphone and line amplifier capable of technically reaching maximum output and SPL without the usual side effect of distortion, delivering power, audio fidelity, speed and accuracy onto a silent canvas.
THD
< -125 dB (0.00006%)
SNR
135 dB, unweighted, 20-20 kHz (> 131 dB THX)
SNR (A-Weighted)
137 dB (> 135 dB THX)
Frequency Response
-0.003 dB at 10 Hz, -0.001 dB at 20 kHz
Impedance
60 Ohms (near 0 Ohms THX)
Output Noise
< 1.9 uV at Unity Gain, 20-20 kHz (< 2.45 uV THX)
Max Input
20 Vrms (+28 dBu)
Max Output
20 Vrms (+28 dBu)
Crosstalk
< -133 dB @ 1 kHz, -116 dB @ 10 kHz
Dimensions
220 x 99 x 212mm, 3.62kg