Headphone Reviews

Description: Battery or AC-powered portable headphone amplifier available in three versions: Standard, Premium, Supreme. Number of inputs: one pair, on RCA jacks. Number of outputs: one ¼" stereo headphone jack. Controls: On/Off, Volume, Process On/Bypass, Filter On/Bypass (Supreme only). Input impedance: >50k ohms. Rated input: 0dBU (775mV) Standard; 4dBU (1.24V) Premium & Supreme. Rated output: 22mW into 100 ohms, Standard; 60mW into 100 ohms, Premium & Supreme. Maximum output (<0.02% THD at 1kHz): 400mW into 100 ohms (equivalent to 6.32V RMS). THD: <0.01%, 20Hz-20kHz. IMD: <0.01%, SMPTE/DIN 50Hz/8kHz. S/N ratio: >100dB. Headphone impedance range: 30-600 ohms. Headphone sensitivity range: 80-110dB/mW. Power source: 4 AA cells or 5V DC 700mA AC adaptor (supplied). Battery life: >3 hours alkalines, >1.5 hours NiCads, Standard; >2 hours alkalines, >1 hour NiCads, Premium & Supreme.
Dimensions: 5.25" (134mm) W by 6.2" (158mm) D by 1.1" (28mm) H. Weight: 1 lb (1 lb 4oz with batteries).
Accessories available: Case Logic DM-1 ($19.95) and DM-2 ($24.95) carrying cases; external 4D cell battery holder ($24.95), 12-disc CD wallet ($12.95), Standard cable ($9.95), Premium Straight Wire cable ($39.95), desktop enclosure ($35.95).
Finishes available: any the customer desires, as long as it's black-anodized aluminum.
Serial number of samples reviewed: 930710, none found on most recent samples.
Prices: $199, Standard; $299, Premium; $399, Supreme; upgrades are priced at the difference between what you paid for your current unit and what the new unit costs. The HeadRoom module is also available for $59 (Standard) and $89 Premium. Approximate number of dealers: 1 (direct sales via mail-order). HeadRoom also sells by mail-order portable CD players from Denon and headphones from AKG, Grado, Sennheiser, Beyerdynamic, and Etymotic Research.
Manufacturer: HeadRoom Corporation, 611 North Wallace Avenue, Bozeman, MT 59771. Tel: (800) 828-8184. Fax: (406) 587-9484. Web: www.headphone.com