Legendary AKG sound. All WMS 40 PRO vocal systems share the same brilliant sound and ease of use.
Unique HDAP (High Definition Audio Performance) technology ensures the best possible, realistic sound at any time.
The rugged handheld transmitter with its soft-touch finish is extremely easy to use and fulfills the highest esthetic requirements.
The transmitters operate for 30 hours off a single AA size battery, saving frequent battery replacements and thus money.
If you need two transmitters, consider the cost-efficient Dual Set system.
SR 40 DUAL
Two receivers in a single case minimize space requirements and cost.
All-metal case
Multichannel capability for simultaneous use of up to seven channels (maximum number of channel depends on local frequency plans).
High Definition Audio Performance technology ensures the legendary, realistic AKG sound and perfect audio transmission.
HT 40 PRO
High Definition Audio Performance technology ensures the legendary, realistic AKG sound and perfect audio transmission.
Transmitter operates for at least 30 hours off a single AA size battery, saving cost, maximizing dependability, and minimizing onstage stress.
Miniature transmitter
Single-battery powering
Multichannel capability for simultaneous use of up to seven channels (maximum number of channel depends on local frequency plans).
Technical Info
Channel Frequencies
Channel 54: 710.400 MHz
Channel 54B: 711.000 MHz
Channel 58: 734.600 MHz
Channel 58B: 736.975 MHz
Channel 60A: 748.875 MHz
Channel KR4: 750.900 MHz
Channel 60B: 751.550 MHz
SR 40 DUAL
Carrier frequency range: 710 to 865 MHz, 2 fixed-frequency receivers in single case
Modulation: FM
Audio bandwidth: 40 Hz to 20 kHz
THD: typical 0.8 % (at 1 kHz)
Signal/noise ratio: typical 110 dB(A)
Power supply: 120/230 V AC
Audio outputs: balanced 1/4 in. jack, output level adjustable, at rated deviation: 500 mV rms.
Dimensions: 200 x 190 x 44 mm (7.8 x 7.4 x 1.7 in.)
Net weight: 647 g (1.4 lbs.)
HT 40 PRO
Carrier frequency range: 710 to 865 MHz, 1 fixed frequency
Modulation: FM
Audio bandwidth: 65 Hz to 20 kHz
THD: typical 0.8 % (at 1 kHz)
Signal/noise ratio: typical 110 dB(A)
Power supply: 1 AA size battery
RF output: typical 10 mW (ERP)
Battery life: typical 30 h (for 2200 mAh)
Dimensions: 229 x 53 dia. mm (9 x 2.1 in.)
Net weight: 195 g (6.95 oz.)
Personal use items that are used at your mouth or in your ear cannot be returned once opened due to health laws. This includes all microphones, guitar talk boxes, ear plugs, and in-ear earphones. 
