WMS 300
Microphone System
Description
The WMS 300 wireless microphone comprises a
transmitter bodypack, four transmitter handheld microphone
models, and a receiver. The bodypack and handheld
transmitters have the same transmission characteristics, with
a maximum radiated power of 10 milliwatts. Through signal
companding (compression and expansion), a dynamic range
greater than 100 dB is attained at the receiver’s output. Audio
bandwidth of the system is uniform over a wide range in
typical performance spaces, extending up to distances of
330 feet (100 meters). Individual handheld microphone and
bodypack transmitters are factory matched to a given
receiver. Each set provides a 20 MHz-wide UHF send-receive
channel, each with 16 sets of sub-channels for microphone
use. In the U. S., a total of eight sets of 20 MHz channels
may be chosen from. Because of some channel overlap, and
the recommendation that adjacent sub-channels not be used
in a given installation, the user may expect 16 usable
channels in a given installation. The Model PT 300 bodypack
is powered by 3 AA batteries, and normal battery life of 10 to
12 hours can be expected from standard 1.5 volt cells.
The PT 300 accepts both microphone and line level input
signals, and four values of input sensitivity can be selected
for optimum transmission. The antenna is a quarterwavelength wire, affording easy concealment and
comfortable wearing. Four of AKG’s most popular handheld
"vocal" microphone head units are incorporated into the
handheld transmitting models. The microphones are the
models D 3700, D 3800, C 5900, and C 535 EB. The
handheld transmitters have the following controls: power
on/off, microphone mute, and input sensitivity control. In
addition, a DIP switch provides for simple setting of the
desired transmitting frequency, and LEDs indicate low battery
and signal overload. Powering of the handheld transmitters is
the same as for the bodypack.
The SR 300 receiving unit is one standard rack unit high
and one-half rack unit wide. Thus, two receiving units can be
placed side by side. Each SR 300 comes from the factory
with a 20 MHz-wide UHF channel containing a set of 16
preset operating frequencies.
The SR 300 operates as a true diversity receiver, in which
two completely separate receiver-demodulator sections are
operating at all times. The output of the system is the receiver
that has the widest dynamic range, and the switching from
one receiver to the other is absolutely noiseless.
Controls on the SR 300 include: squelch threshold adjust,
carrier frequency selection, and output level control.
Indicators on the unit include: mute, audio overload, RF, and
diversity LEDs, Each SR300 can accommodate a pair of
diversity antennas: however, when a number of receivers are
used in a single installation, a master antenna pair (with
booster) can be used and fed to all receivers.
A wide range of accessories is provided for operational
flexibility and ease of installation.
Features
• Factory matched and optimized
transmitter/receiver frequency
group
• True diversity reception
• Dynamic range > 100 dB
• Simple, foolproof setup procedure
• Both bodypack and handheld
microphone transmitters available
• 32 channels available
for U. S. usage
Specifications
PT 300 Bodypack
Audio Bandwidth: 70–20,000 Hz
Carrier Frequency Range: 766 MHz to 785.65 MHz
785.35 MHz to 805 MHz
Modulation Method: FM
Rated Deviation: ±50 kHz at 1 kHz (sinewave)
S/N Ratio (A-weighted): > 100 dB
Audio Input:
Minijack Lemo/Fischer socket optional
Current Consumption: < 150 mA
Power Requirement: 3 AA 1.5-V batteries
Battery Life: Dry batteries, 10 to 12 hours
700-mAh NiCd (rechargeable),
> 4.5 h, 1100-mAh NiMH
(rechargeable) , <7.5 h
Size: 2.7 x 0.7 x 3.7 in.
(70 x 18 x 94 mm)
Net Weight: 8.1 oz. (230 g) without batteries
Specifications
SR 300 Receiver
Carrier Frequency Range: 766 MHz to 785.65 MHz
785.35 MHz to 805 MHz
Carrier Frequencies: 16
Modulation Method: FM
Rated Deviation: ±50 kHz at 1 kHz (sinewave)
Squelch Threshold: Adjustable between -95 and -80 dBm
Audio Bandwidth: 70–20,000 Hz
THD at 1 kHz: > 0.8% at rated deviation
Signal-to-noise at ±50 kHz
Dynamic Range: 110 dB typical
Audio Output:
Balanced XLR-M, adjustable from -30
to
+6 dBm; unbalanced 6.5 mm(0.25 in.)
jack, adjustable from -36 to 0 dBm
Current Consumption: 150 mA typical
Power Requirement: 11 to 15 V dc or ac from
external power supply
Size:
8.3 x 1.8 x 7 in. (210 x 45 x 180 mm)
Net Weight: 23 oz. (650 g) without batteries
Specifications
WT 300 Handheld
D 3700 WL D 3800 WL C 5900 WL
Transducer Principle: dynamic dynamic condenser
Frequency Range: 70–18,000 Hz 70–20,000 Hz 70–20,000 Hz
Polar Pattern: hypercardioid hypercardioid hypercardioid
Sound Pressure Level for 1%/3% THD: 147/156 dB 147/> 150 dB 147/> 150 dB
S/N Ratio (A-weighted): > 100 dB-A
Carrier Frequency Range: 766 MHz to 785.65 MHz
785.35 MHz to 805 MHz
Channel Bandwidth: up to 20 MHz
Carrier Frequencies: 16
Modulation Method: FM
Radiated RF Power: 10 mW (50 ohms)
Antenna: flexible, quarter-wave wire
Rated Deviation: ± 50 kHz at 1 kHz (sinewave)
Compander System: 2-to-1, rms; 50 µsec pre-emphasis >100 dB-A
Input Level: four settings (110/120/130/140 dB-SPL)
Current Consumption: <150 mA
Power Requirement: 3AA 1.5-V batteries
Battery Life: dry batteries, 10 to 12 hours < 4.5 h (NiCd): > 7.5 h (NiMH)
Size: dia. 2.1 in. (53 mm), length 9.6 in. (245 mm)
Net Weight: 10.76 oz. (305 g) without batteries
Microphones · Headphones · Wireless Microphones · Wireless Headphones · Headsets · Electroacoustical Components
Limited Warranty
Valid only in the United States. AKG Acoustics warrants AKG products against defects in material
or workmanship for a period of two years from the date of original purchase for use, and agrees to
repair or, at our option, replace any defective unit without charge for either parts or labor. Important:
This warranty does not cover damage resulting from accident, misuse or abuse, lack of reasonable
care, the affixing of any attachment not provided with the product, loss of parts or connecting the
product to any but the specified receptacles. This warranty is void unless service or repairs are
performed by an authorized service center. No responsibility is assumed for any special, incidental
or consequential damages. However, the limitation of any right or remedy shall not be effective
where such is prohibited or restricted by law. Simply take or ship your AKG product prepaid to our
service department. Be sure to include your sales slip as proof of purchase date. (We will not repair
transit damage under the no-charge terms of this warranty.) Note: No other warranty, written or oral
is authorized by AKG Acoustics, Inc. This warranty gives you specific legal rights, and you may also
have other rights which vary from state to state. Some states do not allow the exclusion or
limitation of incidental or consequential damages or limitation on how long an implied warranty
lasts, so the above exclusions and limitation may not apply to you.
Specifications subject to change without notice.
AKG Acoustics GmbH
Lemböckgasse 21–25, P.O.B. 158, A-1230
Vienna/AUSTRIA
Tel: (43 1) 86 654-0*, Fax: (43 1) 86 654-516
Internet: http://www.akg.com
AKG Acoustics; A Division of Harman Pro Germany
Bodenseestraße 228, D-81243 München/GERMANY
Tel: (089) 87 16-0, Fax: (089) 87 16-200
Arbiter Pro Audio
Wilberforce Road, London NW9 6AX/ENGLAND
Tel: (0181) 202 1199, Fax: (0181) 202 7076
AKG ACOUSTICS, U.S.
914 Airpark Center Drive
Nashville, TN 37217, U.S.A.
Tel: (615) 620-3800, Fax: (615) 620-3875
Studer Japan Ltd.
2-43-7, Uehara, Shibuya-ku, Tokyo 151-0064/JAPAN
Tel: (813) 3465-2211, Fax: (813) 3465-2214
Erikson Pro Audio
620 McCaffrey, St-Laurent, Quebec, H4T 1N1, CANADA
Tel: (514) 738-3000, Fax: (514) 737-5069
Internet: www.jam-ind.com/eriksonpro
AKG is constantly improving and modifying its products, therefore, specifications are subject to change without notice.
The wireless microphone system shall operate over the UHF
frequency range from 766 to 805 MHz range, with transmitter
power not exceeding 10 milliwatts. Both handheld and
bodypack type transmitters shall be provided. The bodypack
transmitter shall accommodate both microphone and line level
inputs. The transmitters shall operate with a companding system
that is complemented by the receiver, providing an A-weighted
system dynamic range in excess of 100 dB. The transmitters
shall indicate input overload and low battery power. Handheld
transmitters shall have a maximum diameter of 2.125 in. (53 mm)
and a length, including antenna, no greater that 11.125 in. (282
mm). The receiver shall operate on the true diversity principle,
and that action shall be inaudible as such. Adjacent channel
isolation shall be at least 60 dB, and total harmonic distortion at
1 kHz for rated deviation shall be no greater than 0.8%. The
receiver shall provide for a manual squelch adjustment for
optimum system operation. An output level adjustment shall be
provided, and there shall be both balanced XLR-M output and
unbalanced 0.25 in. (6.5 mm) jack.
The wireless microphone system shall incorporate factory optimized
sets of both sending and receiving frequency modules that are built into
both transmitters and receivers. Each frequency set shall comprise a 20
MHz UHF band and offer at least 16 discrete operating frequencies within
that band. The wireless microphone system shall be the AKG Acoustics
Model WMS 300.
Graphical Data
Architects and Engineers Specifications
DS-WMS 300
Accessories: RMU2A 2-Unit rack mount mainframe with passive splitter
RMU2 1-Unit rack mount mainframe
P300 System antenna splitter
RA300B Remote antenna for antenna splitter
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