Benchmark HPA4 Headphone/Line Amplifier

The Benchmark HPA4 is the ultimate expression of the THX-888 amplifier design in a headphone and line amplifier, 256-step relay gain control in 0.5dB increments, 64 precision relays, SNR above 131dB, and THD below 0.00006%. Designed, assembled, and tested in the USA.

Type and Technology

Desktop headphone amplifier and line preamplifier, fully balanced, 100% analog signal path. THX-888 with AAA feed-forward error correction. 256-step relay gain control (0.5dB steps). Balanced XLR and unbalanced RCA inputs and outputs. Balanced 4-pin XLR and 6.35mm headphone outputs. Touch screen. IR remote compatible with Benchmark DAC3, single remote operates both. 12V trigger I/O.

System Context

The HPA4 bridges the Benchmark DAC3 B (or DAC3 L) to headphones and loudspeakers simultaneously. Its line outputs can feed the Benchmark AHB2 power amplifier for a complete headphone and speaker system from a single preamp. One remote controls the whole stack.

Best For

Serious audiophiles who want the finest headphone amplifier and line preamp available, the ideal bridge between the Benchmark DAC3 and AHB2.

What's in the Box

• Benchmark HPA4
• Power cable
• Documentation

Specifications