The Henry Engineering Matchbox-HD bi-directional stereo level and impedance interface quickly and easily connects consumer gear to professional equipment, eliminating the hum, buzz, and distortion caused by mismatched levels and impedances. It is ideal for devices that play and record, such as DAT recorders and computer sound cards.

The rack-mountable Matchbox HD offers a true 100 dB S/N ratio, with 22 dB of headroom to yield 122 dB of dynamic range. A bi-directional unit, it employs four independent amplifiers to convert stereo inputs and outputs from unbalanced -10 dBv levels to +4 dBm balanced 600 ohm lines. All four outputs can be adjusted to accommodate a wide range of operating levels.

The Matchbox HD also features a special 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 provide complete sonic transparency.

The Matchbox HD has an internal AC power supply. It is 1/3 rack width and can be mounted using the optional rack shelf, or wall mounted with optional wall/cabinet mounting brackets.