Wohler HRS-1S Installation and operation manual

HALF-RACK STEREO AUDIO MONITOR
HRS-1S
Order Part Number
HRS-1: 8100-0310
Description
The HRS-1S provides self-powered, full-fidelity audio
monitoring of 2 analog channels in the smallest space
possible (half-width 1 RU). This unit contains two high
performance transducers driven by two power
amplifiers: one amplifier/driver combination handles
midrange and high frequency information, while the
second handles summed low frequency information
below the 500 Hz crossover point.
The unique design allows this unit to fit almost
anywhere, and provides optimally focused sound for
operators in an ultra near field (1 to 3 ft.) working
environment. This provides for a higher SPL for the
operator while reducing overall ambient sound and
adjacent bay crosstalk.
Extended HF response reveals potential problems
with audio whine or hiss. Electronic rather than
acoustic cancellation of bass frequencies provides
positive audible detection of out-of-phase (reversed
polarity) audio feeds. A headphone jack is provided on
the front panel, usage automatically mutes the
speakers. Output limiter circuits are incorporated to
protect the speakers, and extensive magnetic
shielding allows placement immediately adjacent to
video monitors with no color impurities.
Features
Premium quality subwoofer and midrange speaker
High quality AMP Series internal amplifier
2 balanced analog Inputs with loop-through (1 stereo)
95dB SPL at 2 feet (0.6m)
Premium quality drivers and power amplifiers
Headphone jack mutes speakers

HALF-RACK STEREO AUDIO MONITOR
HRS-1S
Benefits
Thorough magnetic shielding for placement next to
sensitive equipment.
Extended frequency response and low distortion
Electronic cancellation of bass frequencies provides
audible indication of phase/polarity problems.
Incredibly compact, fits almost anywhere, 1/2 rack
wide (8.5”), 1RU high.
Quick and simple installation
Focused sound reduces adjacent bay crosstalk.
Rear Panel
Physical Specifications
Technical Specifications
Dimensions (H x W x D) 1.75” x 8.5” x 7.5” (44.5 mm x 483 mm x 190 mm)
Shipping weight 7 lbs (3.17 kg)
Space requirements half-width of 1RU in a standard 19” rack
Supplied accessories AC external power unit/cord
Power requirements Power to the unit is 24V DC, 3.0 A. The external power supply then connects to
mains power (100 to 240 VAC ± 10%, 50/60Hz.
Power consumption 35 W
Inputs 1 pair analog (3-in XLR-F) (left and right)
Outputs 1 pair analog (3-in XLR-M) (left and right)
Input impedance (balanced)
Input level for maximum output
(volume full on) 0 dBv balanced; +10 dB unbalanced
Input overload +26 dBv balanced; +14 dBv unbalanced
Peak acoustic output (at 2 ft.) 95 dB SPL

HALF-RACK STEREO AUDIO MONITOR
HRS-1S
3-Pin XLR Pin-Outs
Response, 6th octave 80 Hz - 16 kHz ± 7 dB (-10 dB @ 50 Hz, 22 kHZ)
Power output
RMS mid-Range
RMS bass
10 W transient / 5 W continuous
20 W transient / 10 W continuous
Distortion, electrical < 0.15% at any level below limit threshold
Distortion, acoustic 8% or less at worst case frequencies above 180 Hz including cabinet resonance;
typically less than 2%
Hum and noise better than -68 dB below full output
Magnetic shielding < 1 Gauss any adjacent surface
Female
Male
Technical Specifications (Continued)

HALF-RACK STEREO AUDIO MONITOR
HRS-1S
Contact
Wohler Technologies, Inc. Wohler Europe Wohler Asia
31055 Huntwood Avenue [phone] Lucky Commercial Center
Hayward, CA 94544 USA [phone] (fax) 103 Des Voeux Road West
+1 888 5 WOHLER (Toll Free) [e-mail] Sheung Wan, Hong Kong
[phone] www.wohler.com [phone]
[phone] (fax) [phone] (fax)
Part Number 830029, Revision C
Block Diagram
Woofer
Speaker
Mid-Range
Speaker
Analog
Amplier
Volume
Headphone
B
A
Loop Output B
Loop Output A
Analog Input
Stereo/
Mono
Switch