AKG WMS40 Mini Instrumental Wireless system US25C: 539.300MHz

AKG WMS40 Mini Instrumental US25C: Plug-and-Play Wireless for Guitar and Bass

This model delivers reliable, license-free wireless performance for guitarists and bassists ready to leave the cable behind. Plug-and-play architecture locks the bodypack and SR40 receiver onto 539.300 MHz the moment power is applied. Inside the box sit the PT40 Mini pocket transmitter, MKG L instrument cable and BC400 belt clip, all built around HDAP circuitry. The kit suits worship teams, rehearsal rooms, club stages and touring bassists wanting a stripped-back, dependable rig.

Standout Design Details

The PT40 Mini uses a professional 3-pin mini-XLR input that accepts guitar and bass levels directly, removing the need for impedance adapter boxes. Also, a switched-mode PSU with interchangeable US/UK/EU plug tops removes voltage worries when playing international gigs. A single AA battery delivers up to 30 hours of performance, confirmed by manufacturer documentation and long-form buyer reports. Players notice LED status indicators on the bodypack and receiver, an on/off/mute switch and an onboard low-battery warning handle stage-side control effectively.

Technical Parameters at a Glance

• Transmitter: PT40 Mini bodypack — 3-pin mini-XLR input for guitar and bass levels
• Receiver: SR40 single channel; 0.5 kg; 133 mm × 44 mm × 132 mm — balanced 6.3 mm jack output, three status LEDs
• Frequency Band: UHF 539.300 MHz (US25C variant, fixed channel) — license-free across Europe
• Battery Life: 30 hours on one AA cell — low-battery indicator included on the transmitter
• It supports HDAP audio processing throughout the signal path, providing clear sound across the 20 Hz to 20 kHz range with 10 mW transmission power.

Who the WMS40 Mini Is Built For

Guitarists and bassists performing on small-to-medium stages looking for wireless mobility in a gig-bag format find this model well-suited. Solo performers, duos, church bands and worship teams gain an easy setup with stable signal at roughly 15-20 metres inside clubs and small halls. Beginners have a forgiving entry into wireless performance without on-stage frequency juggling. Bands running multiple wireless channels should note the rig uses a single fixed frequency, so coexistence with other RF gear or 4G/LTE devices may require pre-gig testing.

AKG's Multi-Decade Audio Heritage

For more than 65 years the brand has engineered microphones and wireless systems used worldwide on stages and in studios. The WMS40 Mini family channels that heritage into a streamlined budget-format bodypack with HDAP processing aimed at everyday performance use, balancing portability with reliable analogue UHF transmission.