Overview: The Sennheiser RS 135 RF Wireless
headphone system consists of a pair of wireless headphones (HDR 135) and a radio
frequency (RF) transmitter (TR 135). The system is designed to enhance the sound
of your TV or home audio source, and to give you the freedom to walk around your home
with the headphones on.
Wireless Headphones: The HDR 135's wireless headphones
feature an open, supra-aural (on-ear) design. The soft-padded ear cups
and headband provide hours of listening comfort. The headphones have the power control
left ear cup, and volume and tuning controls on
the right ear cup. Two charging contacts are located on the inside of the headband. With the
batteries installed, the HDR 135 headphones weigh 7.9 ounces.
TR 135 Transmitter: The transmitter connects to your
television's or audio system's audio output via the attached RCA cable (82"
length). The audio is transmitted on the 900 MHz band (926.15 to 927.55 MHz)
with FM stereo modulation. The extended transmission range is approximately
328 feet (100 meters) with reception through walls and ceilings. The transmitter is powered by
a 9-volt DC power supply/AC adapter. The transmitter features a convenient
charging stand for the headphones that extends above the top of the transmitter.
Two keyhole slots are provided on the back to allow you to wall-mount the
transmitter, if desired.
Audio Connections: The transmitter has an attached audio
cable with stereo RCA plugs. Two adapters are included: a female stereo
RCA-to-male 3.5mm (1/8") plug, and a female 3.5mm-to-1/4" (6.3mm) plug.
Rechargeable Batteries: The headphones are powered by
two (included) "AAA" rechargeable NiMH batteries (1.2V, 600mAh). The batteries
fully charge in approximately 18 hours when placed on the charging stand.
Typical battery life is approximately 22 hours of use. Standard,
non-rechargeable "AAA" batteries should not be used in the headphones.
Additional Headsets: The optional Sennheiser
120 wireless headphones, sold separately, can be used as a second set of
headphones for the RS 135-9 system. They operate on the same frequency band with
FM stereo modulation. Multiple pairs of headphones can be used simultaneously with the RS 135-9
- Frequency Response: 22Hz - 19,500Hz
- Maximum Sound Pressure Level: 106dB at 1kHz, 1 Vrms
- Total Harmonic Distortion: <0.7% at 1 kHz, 100dB SPL
- Transmission Range: Up to 330 feet (100 meters)
- Headphones (Earcups): Width 3.163", Height 4.013",
- Transmitter: Width 3.32", Height 5.25" (8.875"
including charging stand), Depth 5.24"
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