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Benchmark HPA4 Headphone / Line Amplifier
View All / Benchmark HPA4 Headphone / Line Amplifier

Benchmark HPA4 Headphone / Line Amplifier

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Overview


Featuring the flagship THX-888 amplifier design, the revolutionary HPA4 headphone amplifier incorporates the same THX AAA technology that Benchmark uses in the AHB2 power amplifier. The HPA4 delivers sonic perfection. Hear the music without any contamination from electronic noise or distortion. The HPA4 delivers power, audio fidelity, speed and accuracy over an utterly silent background.

Features


  • THX-888 (AAA™) Headphone Amplifier
  • Benchmark Low-Noise 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
  • 0.01 Hz to 500 kHz
  • SNR > 135 dB
  • THD < 125 dB (0.00006%) under full load
  • Short-Circuit Protection
  • DC Protection
  • Over-Voltage Protection
  • 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

Specifications


(using balanced inputs at +24 dBu)

THX-888™ Headphone Output:
  • THD < -125 dB (0.00006%)
  • SNR > 131 dB, unweighted, 20-20 kHz
  • SNR > 135 dB, A-weighted
  • Frequency Response - 0.003 dB at 10 Hz, -0.001 dB at 20 kHz
  • - 3 dB Bandwidth exceeds 0.1 Hz to 500 kHz
  • Output Impedance, near 0 Ohms
  • Output Noise < 2.45 uV at Unity Gain, 20-20 kHz
  • Maximum Output Power, 6 Watts into 16 Ohms
  • Maximum Output Current, 1.5 A
  • Maximum Output Voltage, 11.5 Vrms into 300 Ohms
  • Crosstalk < -133 dB @ 1 kHz, -115 dB @ 10 kHz (XLR4)
Balanced Line Outputs:
  • THD < -125 dB (0.00006%)
  • SNR > 135 dB, unweighted, 20-20 kHz
  • SNR > 137 dB, A-weighted
  • Frequency Response - 0.003 dB at 10 Hz, -0.001 dB at 20 kHz
  • - 3 dB Bandwidth exceeds 0.1 Hz to 500 kHz
  • Output Impedance 60 Ohms
  • Output Noise < 1.9 uV at Unity Gain, 20-20 kHz
  • Maximum Input and Output Voltage, 20 Vrms (+28 dBu)
  • Crosstalk < -133 dB @ 1 kHz, -116 dB @ 10 kHz

Dimensions:
21.9cm W x 9 .8cm H x 21.1cm D (Including Feet)

21.9cm W x 8.8cm H x 21.1cm D (Excluding Feet)

Weight:
3.6kg

Power:
  • 18W Typical Input Power
  • 35W Maximum Input power
  • 0.33 W Standby Power (when off)
  • Internal Universal Power Supply

Delivery Options

  • S.F. Express - Office / Home Delivery
  • S.F. Express - EF Locker Pickup
  • S.F. - Business Station
  • S.F. Express - Store Pickup
  • S.F. Express (Macau)
  • Self Pick-up (Lai Chi Kok)
  • N/A*

Payment Options

  • AlipayHK
  • FPS QR CODE/ TAP&GO
  • Octopus Card / Octopus Wallet
  • WeChat Pay HK
  • Visa / MasterCard Credit Card
  • UnionPay
  • Apple Pay
  • Payme
  • PayPal & Credit Card
  • Bank Transfer／ATM
  • Combine Multi-payment Method
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