KRAMER 903 4×1 Personal Stereo Audio Amplifier & Switcher

INPUTS:    1 unbalanced stereo audio 1Vpp/50kΩ on a 3.5mm mini jack; 3 unbalanced stereo audio 1Vpp/50kΩ on RCA connectors.
OUTPUTS:    Stereo headphone on a 6.5mm connector; loudspeakers on a terminal block connector; automatic switching when a headphone is plugged in.
OUTPUT POWER:    2x10W (4Ω).
OUTPUT MUSIC POWER:    2x40W (4Ω).
BANDWIDTH (-3dB):    20kHz.
S/N RATIO:    77dB @1kHz.
CROSSTALK:    -73dB @1kHz, all hostile.
CONTROLS:    Input selector switches: bass (70Hz), mid (1kHz), treble (15kHz): +/-13dB; volume, balance and loudness controls.
COUPLING:    AC.
AUDIO THD + NOISE:    0.5%.
AUDIO 2nd HARMONIC:    0.3%.
POWER SOURCE:    12V DC, up to 2.5A.
DIMENSIONS:    19cm x 13.5cm x 2.5cm (7.5” x 5.3” x 0.98”) W, D, H.
WEIGHT:    0.6kg (1.32lbs) approx.
ACCESSORIES:    Power supply.
OPTIONS:    RK-T2B 19" rack adapter.

INPUT:    1 unbalanced stereo/balanced mono, 1Vpp/33kΩ on a 3.5mm mini jack.
OUTPUTS:    5 unbalanced stereo/balanced mono, 1Vpp/50Ω on 3.5-mm mini jacks.
MAX. OUTPUT:    5Vpp.
AUDIO BANDWIDTH (-3dB):    20kHz.
S/N RATIO:    80dB unweighted.
CONTROL:    Left and right gain rear trimmers (0 to +3.5dB).
COUPLING:    AC.
THD:    0.03% (2nd harmonic).
POWER SOURCE:    12V DC, 100mA.
DIMENSIONS:    12cm x 7.5cm x 2.5cm (4.7” x 2.95” x 0.98”) W, D, H.
WEIGHT:    0.28kg (0.62lbs) approx.
ACCESSORIES:    Power supply, mounting bracket.
OPTIONS:    RK-3T 19" rack adapter.

INPUTS:    2 balanced stereo audio +4dBu/50kΩ on XLR (F) connectors.
OUTPUTS:    10 balanced stereo audio +4dBu/50Ω on XLR (M) connectors.
MAX. OUTPUT LEVEL:    23.8Vpp.
BANDWIDTH (-3dB):    >100kHz.
S/N RATIO:    89.3dB.
CROSSTALK:    -78dB.
CONTROLS:    Level (x2): -0.7dB to +5.1dB, mode selector switches.
COUPLING:    AC (input); DC (output).
AUDIO THD + NOISE:    0.081%.
AUDIO 2nd HARMONIC:    0.006%.
POWER SOURCE:    230V AC, (115V AC USA), 6VA.
DIMENSIONS:    19" x 7" x 1U W, D, H, rack mountable.
WEIGHT:    2.6kg (5.7lbs) approx.
ACCESSORIES:    Power cord.

Input     Unbalanced Stereo Audio, 1 Vpp @ 20K ohms, on a 3.5mm stereo miniplug
Output     Unbalanced Stereo Audio x2, 1 Vpp @ 150 ohms, on 3.5mm stereo miniplugs
Coupling     AC
Audio Bandwidth     100 kHz
Signal to Noise Ratio     71.6 dB
Audio THD     0.017%
Audio Control     Left and Right Gain Control
Dimensions     2.36 x 2.56 x 1“
6 x 6.5 x 2.5cm
WxDxH
Weight     0.22 lbs
0.1 kg
Power Source     12 VDC on a AC Power Adapter

The TP-105 and TP-105HD are line drivers and distribution amplifiers for twisted pair signals. They take a twisted pair input and distribute it to 2 identical twisted pair outputs.

• Max. Resolution - WUXGA & 1080p (TP-105HD).
• Twisted Pair Output - RJ-45 connectors.
• Level (Gain) and EQ (Peaking) Controls.
• System Range - Up to 100 meters (320ft).
• Power Connect System - Only one unit in a system, the transmitter or the receiver needs to be connected to a power source when the devices are within 50m (150ft) of each other.
• HDTV Compatible (TP-105HD).
• Cable - UTP (unshielded twisted pair) or STP (shielded twisted pair) such as CAT 5.

INPUTS:    4 balanced stereo audio, +4dBu typical, on XLR connectors.
OUTPUT:    1 balanced stereo audio, +4dBu typical, on XLR connectors.
SWITCHING SYSTEM:    Mechanical, break-before-make.
BANDWIDTH (-3dB):    100kHz (audio).
CROSSPOINTS:    4 x 2 for audio stereo.
SIGNAL LEVELS:    Up to +30dBu.
DIMENSIONS:    15.3cm x 6.6cm x 7.6cm (6” x 2.6” x 3”) W, D, H.
WEIGHT:    0.57kg (1.27lbs) approx.
OPTIONS:    RK-4X 19" rack adapter.