Benchmark AHB2 High-Resolution Power Amplifier (Black, Rack Mount)

Benchmark AHB2 High-Resolution Power Amplifier (Black, Rack Mount)

Benchmark AHB2 High-Resolution Power Amplifier (Black, Rack Mount)

B&H # BEHRPABRM MFR # 500-18000-400
Benchmark AHB2 High-Resolution Power Amplifier (Black, Rack Mount)

Show MoreLess


Now Viewing:

Special Order
Expected availability: 7-14 business days

Color: Black

Benchmark AHB2 High-Resolution Power Amplifier (Black, Rack Mount) Benchmark AHB2 High-Resolution Power Amplifier (Silver, Rack Mount)

Special Order

Version: Rack-Mount

Non Rack-Mount

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: Dec 17th

James Z. (Wk 1)

Ralph H. (Wk 2)

Arturo M. (Wk 3)

Rich P. (Wk 4)

Valeria A. (Wk 5)

Official 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


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

$0 VA Sales Tax Collected on This Item
Add to Wish List Item in Wish List

Save Up to $15.00

Build Bundle

Benchmark 500-18000-400 overview

  • 1Description

The black, rack mountable AHB2 High-Resolution Power Amplifier from Benchmark is designed to accurately reproduce high resolution audio. The dynamic range approaches 130 dB, and the frequency response extends below 0.1 Hz and beyond 200 kHz. When reproducing high-resolution 24-bit PCM and 1-bit DSD digital audio formats, this amplifier allows you to hear nuances and dynamics which get lost when using amplifiers with lower dynamic ranges.

The AHB2 has bi-polar class-AB output stage that delivers high output current and low noise. The THX patented feed-forward error correction provides accurate cancellation of zero-crossing errors. In addition, the AHB2 uses a resonant switching power supply with a fast control loop so mechanical hum is eliminated while magnetic field strength is reduced.

Dynamic range approaches 130 dB
Bi-Polar class AB output stage provides efficiency and low crossover distortion
SpeakON output connectors
Rack mountable with 2 RU faceplate
In the Box
Benchmark AHB2 High-Resolution Power Amplifier (Black, Rack Mount)
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Benchmark 500-18000-400 specs

    Output Power 1 kHz, < 0.0003% THD+N
    100 W/channel into 8 Ω, both channels driven
    130 W/channel into 6 Ω, both channels driven
    190 W/channel into 4 Ω, both channels driven
    240 W/channel into 3 Ω, both channels driven
    200 W Bridged Mono into 16 Ω
    380 W Bridged Mono into 8 Ω
    480 W Bridged Mono into 6 Ω
    Input Sensitivity Low-Gain: 22 dBu (9.8 Vrms)
    Mid-Gain: 14.2 dBu (4 Vrms)
    High-Gain: 8.2 dBu (2 Vrms)

    Use Mid-Gain or High-Gain settings for unbalanced inputs. Unbalanced inputs require RCA to XLRM adapter cables.

    Input Impedance 50 kΩ, normal mode
    1 MΩ, common mode
    Triggers 12 VDC, 200 mA current-limited output of remote device
    VIL: 1.26 V, VIH: 2.7 V (input responds to 3.3 V logic and higher)
    Input Voltage Range -0.3 to 30 VDC
    Input Impedance 20 kΩ
    Cross Talk Better than -115 dB at 1 kHz
    Better than -92 dB at 20 kHz
    Frequency Response Better than 0.1 Hz to 200 kHz, +0/-3 dB
    -0.01 dB at 20 Hz, -0.17 dB at 20 kHz, 8Ω Load
    -0.23 dB at 20 Hz, -0.32 dB at 20 kHz, 4Ω Load
    Input CMRR 80 dB at 20 Hz, typical
    80 dB at 1 kHz, typical
    65 dB at 20 kHz, typical
    Maximum Output Current 18 A per channel, both channels driven
    18 A protection shut-down threshold
    Signal-to-Noise Ratio 132 dB A-weighted, Stereo Mode
    135 dB A-weighted, Bridged Mono
    130 dB Unweighted, 20 Hz to 20 kHz, Stereo Mode
    133 dB Unweighted, 20 Hz to 20 kHz, Bridged Mono
    THD+N 1 kHz, 80 kHz LPF, at full rated output into any rated load
    Stereo Mode: < -118 dB (< 0.00013%)
    Mono Mode: < -118 dB (< 0.00013%)
    THD 1 kHz, 20 kHz LPF, at full rated output into any rated load
    Stereo Mode: < -119 dB (< 0.00011%)
    Mono Mode: < -120 dB (< 0.00010%)
    Cooling Passive heat sinks
    Power Requirements 100 to 120 VAC ± 10%, 8 A, 50 - 60 Hz
    220 to 240 VAC ± 10%, 8 A, 50 - 60 Hz
    Dimensions (W x H x D) 19.0 x 3.9 x 9.3" (48.3 x 9.9 x 23.7 cm) including feet and binding posts
    Weight 13.5 lb (6.1 kg)

    Benchmark 500-18000-400 reviews

    Be the first to review this item

    Benchmark 500-18000-400 Q&A

    Benchmark 500-18000-400 accessories

    Benchmark 500-18000-400 add-on savings

    The more you Add-On the more you save (when you buy the Benchmark AHB2 High-Resolution Power Amplifier (Black, Rack Mount))
    See any errors on this page? Let us know.