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AKG Acoustics, U.S. • 1449 Donelson Pike • Nashville • TN 37217 • Tel: (615) 360-0499 • Fax: (615) 360-0275
Visit our Web Site at www.akgusa.com
Specifications
PT81 bodypack transmitter:
Audio bandwidth: 50 Hz to 20 kHz
Modulation method: FM
Radiated RF power: 10 mW
Frequency stability: ±10 ppm
Antenna: Flexible, quarter-wave wire
Rated deviation: ±30 kHz
Signal-to-noise ratio: Typical 50 dB (A weighted)
Input impedance: 220 kohms, 600 pF
Audio input: Mini 3-pin XLR; 1400 mV for
rated deviation at 1 kHz
Phantom powering: Pin 3: 6 V/6k8 ohms
Current consumption: 170 mA/2.4 V
Power requirement: 2 AA 1.5V batteries
Battery life: >8 hours
Dimensions: 3.62 x 2.56 x 0.79 in.
(92 x 65 x 20 mm)
Net weight: 3.04 oz. (76 g) without batteries
HT81 handheld transmitter:
Type, bandwidth and polar pattern:
See individual microphone
specification sheets
Modulation type: FM
RF radiated power: 10 mW
Rated deviation: ±30 kHz
Signal-to-noise ratio: Typical 50 dB (A-weighted)
Current consumption: <150 mA/2.4 V
Power requirement: 2 AA size 1.5V batteries
Battery life: >10 hours
Dimensions: 1.4 x 9.4 in dia. (36 mm x 240 mm)
Net weight: 9.8 oz. (245 g)
SR81 receiver:
Receiver type: Diversity
Antenna inputs: 2 x 50-ohm BNC sockets
Modulation type: FM
Input sensitivity: Typical -95 dBm
Squelch threshold: Automatic, using pilot tone (32.678 kHz)
Audio bandwidth: 50 to 20 kHz
THD at 1 kHz: <0.4% at rated deviation
Signal-to-noise Typical 100 dB (A-weighted)
Audio output: Balanced XLR-M, mic/line level
switchable, typical 30 dB unbalanced:
1.4” jack: 0 dBm XLR: 6 dBm
Current consumption: 220 mA typical
Power requirement: 11 to 15 V dc or ac from
external power supply
Dimensions: 8.27 x 6.7 x 1.65 in.
(210 x 170 x 42 mm)
Net weight: 18.8 oz. (470 g)
Accessories:
PS81: Active, wideband antenna splitter for
connecting up to 4 SR81 units or 3
SR81 units and one additional PS.
RA81B: External receiver antenna with
integrated booster, powered via cable
from the PS61 antenna splitter.
PSU01: Central power supply unit for PS61 and
PS81 splitters.
SRA-1: External directional antenna
CCS-1: Color code indicators for easy channel
recognition.
Hard Case CH60: For carrying a single complete system
UAM1: Universal antenna mount for moving
the antennas for 1 receiver to the front
of the rack.