The Rolls HM series Headphone mixing system offers a great-sounding, cost effective and flexible way to provide custom monitor mixes in recording and live sound environments. The combination of unique functions and signal processing add functionality and convenience to any single or multiple-user monitoring application. The system has several options: the HM60 master unit can stand alone or serve as a front end for HM59 and/or HM58 remotes. The remotes come with a 25' DB25 MF cable and can be "daisy chained" around the stage or studio as desired. The DB25 cable is a standard 25 pin computer serial cable and is available in several lengths. The HM60, HM59 and HM58 units are ideal as low distortion headphone drivers for the most critical listening situations. They have mixing capabilities, as well as important signal processing functions to provide a clear and comfortable listening environment. The HM60 and HM59 each have a nine-band graphic equalizer, and the HM58 has Bass, Mid, and Treble controls. Each also features a Rolls 2:1 AGC compressor to comfortably provide even signal dynamics. In addition to providing high current differential buffered signals, the HM60 and HM57 also provide power and ground to the HM58 and HM59 remote mixers. The units clamp to any mic stand. They are housed in rugged painted steel chassis, use only the finest quality components, and come complete with a limited One-Year Warranty.

MPN: HM57
UPC: 675889000573

Input Impedance: 20K ohms
Sensitivity: Variable, -10 to +4 dB for rated output

Power Output:

>500 mW at 32 ohms (>150 mW at 600 ohms) 20 Hz to 20 KHz.

Connectors:
HM60:
Inputs: 1/4" phone, balanced or unbalanced.
Outputs: 1/4" TRS stereo headphone jack, DB25 jack

HM58/59:
Inputs: DB25 Connector.
Output: 1/4" TRS stereo headphone jack.

HM57:
Inputs: 1/4" phone, balanced or unbalanced
Output: DB25 connector

Distortion: 0.008% THD full power @ 1 KHz;
0.05% THD 20Hz to 20 KHz

Dynamic Range: Greater than 96 dB

Freq. Response: 20 Hz to 20 KHz, +0, -1 dB 400 mW output

Power Requirement: HM60; 120 VAC, 60 Hz, 12 watts,
HM57 12VAC power adapter (included)
HM58/HM59; Power provided via DB25 cable

Dimensions: HM60: 1.75" x 19" x 7.25" (HxWxD)
Weight: 6.8 lbs. (3.1 kg)

HM59: 1.25" x 9" x 6.3"
Weight: 4 lbs

HM58: 1.68" x 7.6" x 3.45"
Weight: 2 lbs

HM57 1.325" x 5.5" x 3.3"
Weight: 1 lb