RDL AF-SH1 Headphone Amplifier Wall Mount Stereophonic APPFLEX Series

APPLICATION: The AF-SH1 is used in applications requiring headphones of any impedance to be driven from consumer or professional audio sources. The module mounts conveniently in a precut opening in a wood or metal enclosure or in various RDL mounting accessories. The AF-SH1 is ideally suited to applications as diverse as language translation, museums, interview studios and music stores. 

The AF-SH1 is a dual channel headphone amplifier with balanced/unbalanced left (INPUT L) and right (INPUT R) 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 (L) 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. Audio does not pass through this control, assuring years of noise-free level adjustment. The output amplifiers deliver more than 50 mW into either high or low impedance headphones through a durable, metal ¼” (6.3 mm) standard headphone jack.

Module operation is from a 24 Vdc ground-referenced power supply. It can also operate from a 12 Vdc supply with a 6 dB reduction in headroom and a maximum output power of 10 mW.

The versatile input level range, low distortion, audio clarity and excellent crosstalk performance make this module ideally suited to a wide variety of audio applications. Use this module in conjunction with other RDL modules as part of a high quality, flexible audio/video system.