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RU-SH1 Stereo Headphone Amplifier - RACK-UP Series

  • Rack-Mounted Headphone Amplifier
  • RACK-UP® Series 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
  • RU-SH1
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

The RU-SH1 is used in applications requiring headphones of any impedance to be driven from consumer or professional audio sources. The module mounts in RACK-UP series rack mounts or in various RDL® mounting accessories. The RU-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 top 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. 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 1/4" (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.

Inputs (2):
10 kΩ balanced or unbalanced bridging
Input Level:
+4 dBu nominal (Low input sensitivity)
-15 dBV nominal (High input sensitivity)
Maximum Input Level:
+21 dBu (Low input sensitivity);
+3 dBu (High input sensitivity)
Output Signal (normal rated):
10 mW into 100 Ω
Output Signal (maximum):
50 mW into 100 Ω
THD+N:
< 0.5% @ 1 kHz
Frequency Response:
30 Hz to 20 kHz (± 2 dB)
Noise:
< -70 dB below normal operating level
Gain:
User-adjustable on front panel; 18.5 dB (maximum, High input sensitivity); Unity (maximum, Low input sensitivity)
CMRR:
> 60 dB (50 to 120 Hz)
Crosstalk:
Below noise floor (20 Hz to 20 kHz)
Ambient Operating Environment:
0° C to 55° C
Power Requirement:
GROUND-REFERENCED, 24 Vdc @ 50 mA
Package Type:
Cardboard Box
Package Dimensions:
6.75 x 2.25 x 2 in.
Shipping Weight:
0.555 lbs.
WEEE weight:
0.43 lbs.
Tariff code:
8543.70.9860

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RACK-UP SERIES

RACK-UPs are the original 1/3 rack width 1RU rack-mountable modules for the A/V, recording and broadcast industries. Module functions include mixing, switching, pre-amplification, power amplification, distribution, gain control, equalization and more. Some RACK-UP modules are constructed in solid encapsulated durable industrial black plastic enclosures; MAX RACK-UPs are assembled using heavy duty extruded aluminum and steel panels. The rear panels feature clear bold white lettering for the terminal blocks and connectors. Reverse-printed front-panel polycarbonate laminates provide an attractive, durable finished appearance for rack-mounted or free-standing use.

Since RDL first originated 1/3 rack width modules, RACK-UPs have led the industry in economical, high-performance and cost-effective long life solutions in system designs. Multiple RACK-UP modules may be interconnected, or may be connected with other RDL modules to form all or part of an A/V system. Certain RACK-UP modules are often used free standing; all RACK-UPs may be rack mounted. A complete range of mounting options is available for systems comprised of multiple modules.

RACK-UP modules provide input, output and control connections through terminal blocks and connector (or both) according to common usage in professional installations. Front panels are equipped with connectors, user controls and LED metering, as appropriate.

Functions and features provided by RACK-UPs, since their introduction, are still available today. This continuity in product offering and support makes RACK-UP modules a preferred long-term resource for system design solutions. RACK-UP SERIES modules are designed and manufactured in the U.S.A.

RU-SH1 RU-SH1