Radio Design Laboratories RDL-DB-SH1 Stereo Headphone Amplifier- Decora panel with User Level Control

The dB-SH1 is used in applications requiring headphones of any impedance to be driven from consumer or professional audio sources. The dB-SH1 is ideally suited to applications as diverse as language translation, museums, interview studios and music stores. The module mounts conveniently in a precut opening in a wood or metal enclosure or in various RDL mounting accessories. The dB-SH1 is a dual channel headphone amplifier with balanced/unbalanced left and right inputs. Each input accepts operating levels between -20 dBV and +20 dBu. Two recessed slide switches located on the side of the rear enclosure are set prior to mounting the module. One switch is provided for setting the input sensitivity. The mode switch selects between stereo and mono operation. In the mono position, the left input is used to drive both output channels. When the module is used in a monaural system, only the left channel input must be wired. The front panel level control is a long life potentiometer controlling matched VCAs. Features Panel-Mounted Headphone Amplifier Wall-Mounted Headphone Amplifier Integral Long-Life VCA Stereo Level Control Balanced or Unbalanced Inputs Switch-Selectable Input Sensitivity Switch-Selectable Mono ( Left) or Stereo Operation Amplifier To Drive High or Low Impedance Headsets Convenience of Decora Mounting Possibilities Specifications Output Signal ( normal rated): 10 mW into 100 Output Signal ( maximum): 50 mW into 100 Frequency Response: 30 Hz to 20 kHz ( and #177, 2 dB) Gain: User-adjustable on front panel 18.5 dB ( maximum, HighInput sensitivity), Unity ( maximum, LowInput sensitivity) CMRR:> 60 dB ( 50 to 120 Hz) Crosstalk: Below noise floor ( 20 Hz to 20 kHz)Ambient Operating Environment Power Requirement: GROUND-REFERENCED 24 Vdc, 50 mA Weight: 0.48 lbs