AKG WMS40 Mini2 Dual Vocal Wireless Handheld Set US25 A and C

AKG MINI2VOC-US25A/C: A Matched Pair of Wireless Handhelds

The AKG WMS40 Mini2 Dual Vocal Set is an analog UHF dual-channel wireless system supplying two HT40 Mini handheld transmitters on one SR40 Mini2 receiver, operating on band US25 A at 537.500 MHz and band US25 C at 539.300 MHz. Each handheld carries a dynamic cardioid capsule behind a wire-mesh grille, houses a metal body and runs for more than thirty hours from a single 1.5 V AA size battery. Audio performance is specified at 40 Hz to 20,000 Hz bandwidth, 0.8 percent total harmonic distortion at 1 kHz, a 105 dB-A signal-to-noise ratio and 10 mW maximum RF output. Where two voices need microphones and nobody is going to read a manual, this is the configuration.

Two Handhelds Rather Than a Bodypack

Configuration is what separates the sets in this range, and the vocal version ships two handheld transmitters and no bodypack at all. That matters because a handheld and a bodypack solve different problems: a handheld is passed, shared and pointed, which suits roving microphones, duets and audience questions, while a bodypack frees both hands and suits instruments, headsets and presenters who need to gesture. Ordering the vocal set means committing to the first case, and a venue that later needs a body-worn channel has to add a different set rather than adapt this one. School assemblies, prize-givings, karaoke nights, auctions and worship services with a preacher and a roving reader are all straightforwardly two-handheld situations, and buying the matched pair is simpler and tidier than two single systems.

Dynamic Cardioid Capsules and Why They Suit This Job

Each HT40 Mini carries a dynamic cardioid element, and both halves of that description earn their place. A dynamic capsule generates its signal by moving a coil in a magnetic field with no powered circuitry at the diaphragm, which makes it inherently tolerant of high sound pressure, humidity, handling and being dropped, and those are precisely the conditions a microphone passed around a room encounters. Cardioid pickup then attenuates sound from the sides and rear, so floor monitors and house loudspeakers behind the user are partially rejected by the microphone feeding them, which is what determines how loud the system can be pushed before it rings. A wire-mesh grille in front of the capsule breaks up plosive airflow and keeps fingers and lips off the diaphragm, which is the other thing a shared microphone needs.

The Mute Switch and Passing a Microphone Around

An on, off and mute switch with LED status on each handheld looks like a small detail and turns out to matter enormously in shared-microphone use. Handing a live microphone across a room produces exactly the noises a congregation or an audience does not want to hear, from clothing rustle and handling thumps to the feedback that occurs when the capsule swings past a loudspeaker mid-transfer, and a switch at the microphone lets whoever is holding it mute the channel rather than waiting for an operator to find the right fader. Metal transmitter housings back that up, since a microphone that gets handed around also gets dropped. Auction houses, community meetings and question-and-answer sessions rely on this combination more than any technical specification in the set.

Fixed Carriers and Coordination

Frequencies here are fixed at 537.500 MHz and 539.300 MHz rather than tunable, and the two channels are deliberately spaced so they cannot interfere with each other. Fixed operation removes every configuration step that a non-technical user could get wrong, so there is no scanning, no pairing and no menu to navigate, and a caretaker or a volunteer can set the system up correctly with no training. The consequence is that the frequencies cannot be moved around anything else already using them, so the band letters need checking against existing wireless in the building, and adding further channels to the same room means selecting the other band pairing offered in the range. Beyond four channels in one space, a coordinated frequency-agile system becomes the correct specification.

Receiver, Contents and Suitable Rooms

Reception is handled by a compact tabletop SR40 Mini2 with two fixed external antennas, a non-diversity design giving each channel its own balanced 1/4 in (6.3 mm) TRS jack output and its own volume control. Independent level control at the receiver is useful with two different speakers, because a soft-spoken reader and a projecting presenter can be matched before either signal reaches a mixer channel. In the box are the receiver, both handheld transmitters, two AA batteries and a universal switched-mode power supply, which means the system is complete on arrival. Houses of worship, schools, hotels and conference breakout rooms, community halls and wedding and event hosting are its natural homes, all of them rooms that need reliable wireless without a technician standing behind it.