Henry Engineering THE MATCHBOX HD - IHF-Pro  Stereo Interface Amplifier

Henry Engineering THE MATCHBOX HD - Stereo Level Matching Interface/Amplifier

Henry Engineering THE MATCHBOX HD - Stereo Level Matching Interface/Amplifier

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Henry Engineering MB overview

  • 1Description

The Henry Engineering Matchbox HD is a professional grade analog level and impedance converter, serving as an interface between consumer and professional audio equipment.

The Matchbox HD is a bi-directional unit, employing four independent amplifiers to convert stereo inputs and outputs from unbalanced -10 dBv levels to +4 dBm balanced 600 ohm lines. All four outputs are adjustable, accomodating a wide variety of operating levels.

The Matchbox HD also features a HI GAIN mode to properly match the low-level unbalanced outputs of computer sound cards. The unit's direct-coupled circuitry, and wide dynamic range, provides the sonic transparency, fidelity and level required by the digital editors, DAT's, Hard Disk, Flash Card recorders, and other digital audio sources with which it is meant to interface. The unit has an internal power supply, and 3 units may be rackmounted in a single rack tray, or individually wall and cabinet mounted.

Bi-directional, professional stereo level and impedance matching interface for consumer and professional audio gear
Eliminates hum, buzz, and distortion associated with mismatched levels and impedances
4 independent amplifiers with individual output level trims
Unique HI GAIN mode designed specifically to match low-level, unbalanced outputs from computer sound cards
Extended dynamic range, high operating headroom
Solid, all-metal housing with internal AC power supply
1/3 RU rackmount, wall and cabinet mounting options available
UPC: 837654309070
In the Box
Henry Engineering THE MATCHBOX HD - Stereo Level Matching Interface/Amplifier
  • 1 Year Warranty
  • Table of Contents
    • 1Description

    Henry Engineering MB specs

    Dynamic Range 122 dB(Balanced)
    125 dB(Unbalanced)
    Signal-to-Noise Ratio 100 dB
    Balanced: -100 dB ref. +4 dBu
    Unbalanced: -95 dB ref. -10 dBv
    Maximum Input Level Not Specified by Manufacturer
    Maximum Output Level Balanced In to Unbalanced Out: +20 dBv
    Unbalanced In to Balanced Out: +26 dBu
    Input Connectors 2 x 3-pin XLR Female, L, R
    2 x RCA Phono, L, R
    Output Connectors 2 x 3-pin XLR Male, L, R
    2 x RCA Phono, L, R
    Input Impedance IHF: 10 kOhms, HI GAIN 5 kOhms
    PRO: 20 kOhms
    Output Impedance IHF: 2 kOhms, Unbalanced
    PRO: 600 Ohms, Balanced
    Dimensions 5.7 x 1.65 x 5.6" (144.8 x 41.9 x 142.2mm)
    Weight 2.5 lb. (1.13 kg)
    Packaging Info
    Package Weight 2.2 lb
    Box Dimensions (LxWxH) 8.661 x 6.221 x 2.126"

    Henry Engineering MB reviews

    THE MATCHBOX HD - IHF-Pro Stereo Interface Amplifier is rated 4.5 out of 5 by 11.
    Rated 5 out of 5 by from The proper pro/consumer interface. All to often we resort to using a simple (or not!) adapter cable between consumer and professional audio products. But levels and impedances can be very different, which may well compromise performance significantly. The Henry Eng. MATCHBOX HD is a professional and foolproof way to interconnect studio-level (+4dBm) program lines with consumer CD/MP3 players, disco mixers, etc. with nominal -10dBV ins and outs. It matches levels and impedances so that quality does not suffer from loading effects or headroom considerations. It's easy to install and set up, and is sonically transparent in use.
    Date published: 2011-04-04
    Rated 5 out of 5 by from Does what it says it does, very well Needed something to connect consumer equipment to professional equipment with balanced inputs, this raises the levels and takes care of impedance matching. Very transparent, I don't hear any added noise or distortion. Although there are workarounds for connecting unbalanced to balanced, it is best to use something that matches levels and impedance to maintain system integrity and sound quality. There are less expensive devices with the same functionality but based on the superior specs tried this one and am very pleased with it.
    Date published: 2017-04-28
    Rated 4 out of 5 by from Works great We have used Henrys Matchboxes for over 20 years, and they work great. We probably have about 25 units in use 24/7. The audio is excellent, and Im impressed that the unit has a power supply built in, so theres no wall-wart thing.
    Date published: 2008-03-27
    Rated 5 out of 5 by from great product I don't know how many matchboxes we have, but it's close to 50. Some old style, many the new rack mount kind. Weve used them since 1990 or so, and they sound waay better than the cheapie immitators! A cool product for sure!
    Date published: 2008-03-27
    Rated 1 out of 5 by from Not what one would expect I was surprised at how cheaply made this item was. It'sreally over priced and poorly designed.If you need to do serious work don't bother with this item.I would suggest picking a similar product from a maker thathas a good reputation for quality product (even if it costsmore). Expertise: Audio Engineer Problems Encountered: When you plug in lines, after a while the sockets/jacksdon't work.The sound quality reminds me of cheap stuff for MP3s. Final sound has high noise levels compared to signal.This is basically unusable beyond low quality output.
    Date published: 2007-08-31
    Rated 5 out of 5 by from Matchboxes work great This is a great product! We have about 80 of them in our studios. Never a failure, and excellent audio performance. I really like the steel chassis. You can put them in a rack and not get hum or noise from adjacent equipment. Some of our matchboxes are 15-20 years old and still work perfectly.
    Date published: 2008-05-05
    Rated 5 out of 5 by from Perfect! The Henry Matchbox solved my problems not only wiith impedance matching, but with level-setting as well. I use the Matchbox between a Mackie board and the comsumer-grade audio card in my computer. I can now set precise levels and forget it!
    Date published: 2014-05-30
    Rated 5 out of 5 by from Excellent Product Perfect for converting consumer to pro equipment, use it in our Studio control room. Easy to use just plug and go.
    Date published: 2008-11-17
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