Benchmark HPA4 Reference Headphone/Line Amplifier (Black)

Benchmark HPA4 Reference Headphone/Line Amplifier (Black)

Benchmark HPA4 Reference Headphone/Line Amplifier (Black)

B&H # BEHPA4HLABLK MFR # 500-17200-200
New Item - Special Order

Product Highlights

  • THX-888 Headphone Amplifier
  • High Voltage, Current, and Power
  • Low Distortion, Noise, and Crosstalk
  • 256-Step Balanced Relay Gain Control
  • Balanced and Unbalanced Line I/O
  • DC, Thermal & Short-Circuit Protection
  • Touchscreen Control
  • XLR 4-Pin Balanced Headphone Output
  • 1/4" TRS Unbalanced Headphone Output
  • Designed, Assembled & Tested in the USA
Show moreShow less

Color: Black

Benchmark HPA4 Reference Headphone/Line Amplifier (Black) Benchmark HPA4 Reference Headphone/Line Amplifier (Silver)

Back-Ordered

Configuration: No Remote Control

No Remote Control With Remote Control

New Item - Special Order

This item is noncancelable and nonreturnable.

B&H $500 Gift Card Dash

Share for a chance to win a $500 B&H Gift Card!

Share on Twitter

Share a favorite product for chances to win one of eight $500 B&H Gift Cards!
1 new winner announced every Monday starting Nov 5th!
Limit 1 entry per day: Come back every day to increase your chance of winning.

Be sure to mention #BHWishList when you share!

Congrats to our winners so far:

Next winner: Nov 19th

James Z. (Wk 1)

Ralph H. (Wk 2)

Official Rules

OFFICIAL B&H $500.00 GIFT CARD DASH SWEEPSTAKE RULES

NO PURCHASE IS NECESSARY TO ENTER OR WIN. The B&H $500.00 Gift Card Dash (the "Sweepstakes") is void where prohibited by law and is sponsored by B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 ("Sponsor"). It is not sponsored or endorsed by Facebook or Twitter in any way.

Entry Period/Methods of Entry. The Sweepstakes will run from on or about October 28, 2018 until on or about December 23, 2018 (the "Entry Period"). Entries received outside the Entry Period are void. Enter the Sweepstakes via either one of the following methods. (1) Share any product found on the B&H website (the "Website") on Facebook or Twitter via the dedicated links contained on the website using the hashtag #BHWishlist; or (2) Mail a postcard (postmarked during the Entry Period) containing your name, address, phone number, and email address, and indicate the subject(s), if any, about which you are interested in receiving future emails from B&H (e.g. photo, video, audio, computers, home theater, portable entertainment ) (optional) to: B&H $500.00 Gift Card Dash Sweepstakes, c/o B&H Foto & Electronics Corp., 440 Ninth Avenue, New York, NY 10001 (either option, an "Entry"). Entries must not, in the sole and absolute discretion of the Sponsor, contain obscene, provocative, defamatory, sexually explicit, or otherwise objectionable or inappropriate content. Entries deemed by Sponsor to be inappropriate will be disqualified. Entries owned by a third party, or the use of any trademarks, service marks, logos, brands, or products owned by a third party are not acceptable for entry into the Sweepstakes. Limit 1 entry per person, per day.

Winner Selection/Prizes/Odds. The B&H Social Team will randomly select a winner from among all eligible entries every Monday during the Entry Period, for a total eight (8) winners (each a "Winner"). Each Winner will receive a B&H Gift Card pre-valued in the amount of $500.00. No cash or other substitutions will be offered. Winner selection is in the sole and absolute discretion of the B&H Social Team. Any taxes are the sole responsibility of the winner. Winners will be notified and receive their prize at the email address associated with the account to which their Entry was posted or the email account provided with a mail-in entry. The odds of winning depend on the number of eligible entries received.

Identity of Winners/Eligible Participants. Winners will be identified by the email account associated with the Facebook or Twitter account from which their Entry was submitted or the email account provided with a mail-in entry. An email account holder shall mean the natural person assigned to such email account by the internet access or online service provider or other organization responsible for assigning email addresses for the domain associated with such email account. Any issues regarding the identity of a Winner shall be resolved by Sponsor in its sole discretion. The Sweepstakes is only open to residents of the United States that are at least eighteen (18) years of age on their entry date and is not open to employees of Sponsor, their immediate family, any person domiciled with such employees, or any affiliates or subsidiaries of Sponsor.

Entry Ownership/Entrant Agreements. Entrants retain full ownership and copyrights to their Submission. However, by entering the Sweepstakes entrants grant Sponsor permission to use their Entries for promotional purposes on their respective social media channels with proper credit. Entrants also agree: (a) to be bound by these Official B&H $500.00 Gift Card Dash Sweepstakes Rules; (b) that any claims related to this Sweepstakes shall be resolved individually without resort to any form of class action and that awards, shall be limited to actual out-of-pocket costs incurred in entering the Sweepstakes, and shall not include incidental or consequential damages or attorneys fees; and (c) that any actual or perceived ambiguities in these rules shall be interpreted by Sponsor in their sole discretion.

Limitation of Liability/Sponsor Modification/Cancellation Rights/ Choice of Law/ Venue/ Winners List. Sponsor is not responsible for incomplete entries or for failure to receive entries due to technical failures or human error of any kind. Winners agree that Sponsor will have no responsibility for losses or damage of any kind resulting from the acceptance, possession, or use of the prizes. Except where prohibited, participation in the Sweepstakes constitutes entrant's consent to the publication of his or her name by Sponsor in any media for commercial or promotional purposes without limitation or further compensation subject to Sponsor's respective Privacy Policies. Sponsor may modify or discontinue the Sweepstakes at any time and may disqualify from the Sweepstakes any person it determines, in its sole discretion, to have attempted to or actually tampered with or otherwise abused any aspect of the Sweepstakes. Entrants agree that in the unlikely event a dispute arises in connection with this Sweepstakes, it will be governed by the laws of the State of New York and heard exclusively in a court of applicable jurisdiction in the County and State of New York irrespective of any choice of law provisions to the contrary. To receive names of the winners by U.S. mail, please mail a self-addressed stamped envelope to: B&H Foto & Electronics Corp., Attn: B&H $500.00 Gift Card Dash Sweepstakes, 440 Ninth Avenue, New York, NY 10001. Any Winners List request must be received by B&H within one (1) year of the date the Sweepstakes is conducted.

Let us know how to reach you if you win!

Privacy 100% guaranteed; email address for contact purposes only

Email

Already have a B&H account? Just log in tomorrow to enter again!

New Release!
$0 VA Sales Tax Collected on This Item
$2,995.00
Add to Wish List Item in Wish List

Benchmark HPA4 overview

  • 1Description

The black Benchmark HPA4 is a reference headphone/line amplifier designed to deliver pristine amplification of analog sources for audiophiles, mixing and mastering engineers, and music aficionados in homes, recording studios, and mastering suites. Resulting from Benchmark's collaboration with THX, the HPA4 features a THX-888 headphone amplifier for an output signal with high voltage, current, and power complemented by low distortion, noise, and crosstalk. Designed, assembled, and tested in the USA, it boasts a sturdy brushed aluminum housing with a milled faceplate and milled sides.

The rear-panel I/O includes two balanced stereo XLR inputs, two unbalanced stereo RCA inputs, XLR and RCA stereo outputs, and a mono XLR output. The front-panel offers two headphone outputs, one unbalanced 1/4" TRS jack and one balanced XLR 4-pin jack. Volume adjustments are executed via the 256-step balanced relay gain control, which uses increments of 0.5 dB. The integrated touchscreen and remote control (sold separately) allow convenient access to common functions such as input selection, dim, mute, and more. Built-in protection systems guard against potential damage from DC, short-circuit, over-current, over-voltage, and thermal issues.

THX AAA Technology
The collaboration between Benchmark and THX features THX Achromatic Audio Amplifier (AAA) technology, which reduces harmonic, intermodulation, and crossover distortion by 20 to 40 dB to guarantee a realistic and fatigue-free listening experience. It accomplishes this using a patented feed-forward topology to null conventional distortion and noise mechanisms, resulting in extreme linearity. THX AAA allows the amplifier to reach its maximum output power and sound pressure level without producing the distortion that normally accompanies increased output levels in traditional amplifiers.
Line Amplification
The THX-888 amplifier is driven by a Benchmark line amplifier that features relay gain control, relay input selection, and relay muting. The line amplifier incorporates premium gold-contact relays. The gain control has 256 steps in 0.5 dB increments. It also features a balance control. Relay closures are precisely timed to deliver smooth volume changes. The HPA4 includes four independent 256-step attenuators: two for the headphone outputs and two for the line outputs. To make this all happen, the HPA4 includes a total of 64 precision relays.
100% Analog Signal Path
The HPA4 is 100% analog and should be driven from an external D/A converter or analog source. It eclipses the performance of typical high-end preamplifiers by achieving much lower noise and distortion.
High Voltage, High Current, and High Power
The THX-888 amplifier can cleanly deliver high voltage into low-sensitivity, high-impedance headphones and it can cleanly deliver high power and current into low-impedance headphones. The HPA4 delivers 11.9 Vrms into 300 Ohms and 6W into 16 Ohms. Given these extreme capabilities, Benchmark has incorporated several protection systems to protect expensive headphones and the amplifier itself. These include DC, short-circuit, over-current, over-voltage, and thermal protection.
Speed and Precision
The bandwidth of the HPA4 extends from 0.01 Hz to over 500 kHz with a drop of only 3 dB. The 10 Hz to 20 kHz spectrum boasts a maximum variance of only -0.003 dB. This means that the HPA4 delivers very precise amplitude and phase accuracy over the entire audio bandwidth. Wave shapes are accurately reproduced, and the entire spectrum is delivered with precise timing.
Balanced and Unbalanced I/O
The headphone output of the THX-888 amplifier features a 1/4" TRS and an XLR 4-pin. While both outputs deliver the full performance of the HPA4, the XLR4 is most ideal due to its lower contact resistance. The HPA4 features two balanced stereo inputs via XLR 3-pin jacks and two unbalanced stereo inputs via RCA jacks. The line amplifier provides one balanced stereo output, one balanced mono sum, and one unbalanced stereo output.
Touchscreen
The touchscreen provides easy access to advanced features such as balance control, input level offsets, input names, screen dimming, remote control, and function locking. Help screens explain the special functions.
Rotary Encoder
The volume control knob features a high-quality optical encoder that is rated for heavy use. An acceleration feature makes it easy to move through the 256 volume steps while maintaining 0.5 dB/step resolution. A press of the control knob toggles between headphone volume, line out volume, or both.
Trigger Ports
Two bidirectional 12V trigger ports can be used to link the HPA4 with external D/A converters and power amplifiers. The trigger signal controls the power-up and power-down sequencing of the entire audio system. The trigger ports are compatible with most industry-standard trigger input or output ports, but can communicate bidirectionally with other Benchmark products.
Convenience Features
The HPA4 includes independent on-screen mute buttons for the headphone and line outputs. Both can also be muted with the volume knob or with the remote control (sold separately). An on-screen -20 dB dim button instantly reduces the level by 20 dB, providing a temporary volume reduction and an easy return to the previous listening level. This control makes it easy to transition between a normal listening level and a background level. The dim function is also accessible from the remote control.

Inputs may be renamed and unused inputs may be disabled. Input levels can be trimmed to provide input-to-input level matching. Screen brightness is adjustable and timers can be set to dim or shut off the display. The screen can be locked to prevent access to advanced features.

Sleek and Sturdy Construction
The case features a milled faceplate and milled sides. Top, bottom, and rear panels are made from thick aluminum and feature a brushed texture. The HPA4 was designed, assembled, and tested in the USA.
In the Box
Benchmark HPA4 Reference Headphone/Line Amplifier (Black)
  • Power Cable
  • Trigger Cable
  • Spare Fuses
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Benchmark HPA4 specs

    Number of Channels 2
    Input Connections 2 x XLR 3-pin balanced stereo pairs
    2 x RCA coaxial unbalanced stereo pairs
    Output Connectors 1 x XLR 3-pin balanced stereo pair
    1 x XLR 3-pin balanced mono
    1 x RCA coaxial unbalanced stereo pair
    1 x XLR 4-pin balanced headphone jack
    1 x 1/4" TRS unbalanced headphone jack
    Trigger Connectivity 2 x 12 V bidirectional trigger ports
    Maximum Input Level 20 Vrms / +28 dBu
    Maximum Output Level Line Outputs: 20 Vrms / +28 dBu
    Headphone Output: 11.5 Vrms into 300 Ohms
    Maximum Output Power Headphone Output: 6 W into 16 Ohms
    Output Impedance Line Outputs: 60 Ohms
    Headphone Output: Near 0 Ohms
    Function Controls Volume
    Power
    Frequency Response Exceeds 0.1 Hz to 500 kHz (-3 dB)
    10 Hz (-0.003 dB) to 20 kHz (-0.001 dB)
    THD + N < -125 dB (0.00006%)
    Output Noise Line Outputs: <1.9 ÁV at unity gain, 20 Hz to 20 kHz
    Headphone Output: <2.45 ÁV at unity gain, 20 Hz to 20 kHz
    Signal to Noise Ratio Line Outputs: >135 dB (unweighted, 20 Hz to 20 kHz), >137 dB (A-weighted)
    Headphone Output: >131 dB (unweighted, 20 Hz to 20 kHz), >135 dB (A-weighted)
    Crosstalk Line Outputs: < -133 dB at 1 kHz, -116 dB at 10 kHz
    Headphone Output: < -133 dB at 1 kHz, -115 dB at 10 kHz via XLR 4-pin
    Display Touchscreen
    Power Requirement 100 to 240 VAC, 50/60 Hz
    Input Power 18 W typical
    35 W maximum
    0.33 W in standby mode
    Enclosure Material Aluminum
    Dimensions (W x H x D) 8.7 x 3.9 x 8.3" / 219.7 x 98.6 x 211.6 mm (including feet)
    8.7 x 3.5 x 8.3" / 219.7 x 88.1 x 211.6 mm (excluding feet)
    Weight 8 lb / 3.6 kg
    Country of Manufacture Designed, assembled, and tested in the United States of America

    Benchmark HPA4 reviews

    Be the first to review this item

    Benchmark HPA4 Q&A

    Benchmark HPA4 accessories

    See any errors on this page? Let us know.