AKG WMS470 C5 Wireless Set BD8 570 to 600 MHz Complete Channel

AKG WMS470 C5 Set BD8: A Complete Channel at the Top of the Band

The AKG WMS470 Vocal Set C5 is a complete analog UHF wireless microphone channel in the Band 8 configuration, covering 570.1 to 600.5 MHz at 50 mW of effective radiated power, and supplied with an SR470 stationary receiver, an HT470 handheld transmitter carrying the C5 condenser capsule, two BNC UHF antennas, the RMU4000 rack mount kit, a universal power supply with US/UK/EU adapters, a stand adapter and one AA size battery. Band 8 is the upper of the two bands this set is offered in, and it is chosen either because the lower band is already congested in a particular building or because a large rack needs to combine bands to reach a high channel count. Audio runs 35 to 20,000 Hz with a 120 dB-A signal-to-noise ratio. Because the top of this band meets a regulatory boundary, commissioning it carries one extra obligation that the lower band does not.

Verifying the 600 MHz Boundary Before Deploying

Coverage reaching 600.5 MHz means the upper edge of this band meets the 600 MHz line that spectrum authorities in the United States redrew when that part of UHF was reallocated to mobile broadband. Verification therefore belongs in the commissioning process rather than afterwards, and it is a short, concrete task: read the band designation printed on the receiver and on the handheld, establish which frequencies inside the band remain permitted at the location where the system will operate, then record the resulting channel list so a future technician inherits a documented plan instead of a guess. This is a coordination and legality check about spectrum rules, not a comment on the hardware, and it applies to a permanent installation and to a touring rack alike. A university auditing an estate of installed systems and a rental house preparing a rig for a regional tour both need the same short paper trail.

Environment Scan and Rehearsal as Commissioning Tools

Two functions on the SR470 exist specifically to reduce the risk of deploying near a busy or contested part of the spectrum. An environment scan sweeps the whole band and records what is present across it, producing a picture of the local radio landscape rather than a yes-or-no verdict on one channel, while the rehearsal function watches a chosen channel over a period of time and logs the dropouts, mutes and level events it observes, which is how a fault that only appears once a room fills with people gets caught and attributed rather than blamed on the microphone. Channel preview lets an operator listen to a candidate frequency before the system is committed to it, and pre-coordinated television channel presets supply groups already spaced so several systems will not intermodulate. Running a rehearsal pass during sound check means arriving at doors with evidence rather than optimism.

Pilot-Tone Code Squelch and Fourteen Hours of Runtime

Squelch on this platform is pilot-tone coded, which means the handheld sends a continuous inaudible tone alongside the audio and the receiver refuses to unmute unless it hears that specific tone. Level-based squelch only asks whether a signal is strong enough, so a dimmer buzz, a motor or a carrier from an unrelated system can be energetic enough to open the gate and arrive in the loudspeakers as noise; a coded system cannot be fooled by energy alone, and the same tone doubles as a data path carrying transmitter battery status back to the receiver display. Runtime reaches up to 14 hours from a single AA size lithium cell, with NiMH rechargeable cells supported through the optional CU400 charger. A fourteen-hour cell and a battery readout at the rack together mean a long conference day needs no mid-session change.

Combining Bands to Reach Forty-Eight Channels

Capacity on this platform is 16 simultaneous channels inside one frequency band and as many as 48 when several bands are combined, and that arithmetic is the main reason Band 8 hardware appears in racks that already contain the lower band. Combining bands works because intermodulation products from a group of channels fall mostly within and around that group, so spreading a large channel count across two or three widely separated bands leaves each group easier to coordinate than one enormous group in a single band; it also means a building whose lower band is polluted by a local broadcast can put half its channels somewhere quieter. The SR470 is a half-rack unit supplied with the RMU4000 rack mount kit, so two receivers share one rack space and a 48-channel system remains physically manageable. Corporate conference floors and large theatres are where that ceiling is actually reached.

The Full Box, and Who Deploys the Band 8 Set

Everything required to put a channel into service ships together, which is worth restating because a receiver bought alone arrives without a transmitter and a transmitter bought alone arrives without antennas, a rack kit or a supply. Here both halves are already on the same band, the RMU4000 kit racks the receiver into a 19 in (483 mm) frame, two detachable BNC antennas at 50 ohms allow remote or directional antennas to be substituted later, and the universal supply runs the receiver on 12 V DC at 500 mA from mains anywhere. The buyers are specific: venues matching a new channel to a rack whose transmitters already sit in Band 8, venues whose lower band is congested, theatres and concert halls running long BNC antenna runs, auditoriums auditing an installation for spectrum compliance, touring rigs that re-coordinate in every city, and rental inventories supporting installed Band 8 systems. Verify the band, document the plan, and the channel is ready to run.