AKG Acoustics GmbH

HT 4500

  • Up to 50 mW RF output for maximum immunity to interference and dropouts
  • Operates for up to 15 hours on AA size dry batteries, 12 hours on optional BP 4000 battery pack with integrated Smart Battery Management System
  • 30 MHz wide UHF band, up to 1200 selectable frequencies
  • Choice of six interchangeable microphone elements
  • Backlit display and jog switch for ease of use
  • Charging contacts for easy battery charging on optional charger

The HT 4500 is a professional handheld transmitter with a rugged body and connects to a choice of six different microphone elements to cover a wide range of applications.

Microphone elements include dynamic and condenser cardioid and hypercardioid models. The 30 MHz wide UHF band provides up to 1200* selectable frequencies, and several preset frequency banks for various countries help you set up a multichannel system very quickly. A backlit display makes it very easy to tune the HT 4500 to the same frequency as the SR 4500 receiver. A pilot tone system continuously sends transmitter status data including MUTE switch position and remaining battery life to the receiver.

Integrated charging contacts let you charge the optional BP 4000 battery pack without having to remove it from the transmitter. After only one hour, the battery pack will be fully charged and you can use the transmitter for 12 hours continuously.

The HT 4500 is fully compatible to its predecessor HT 4000. It offers two additional frequency bands in the range of 500 to 530 and 570 to 600 MHz, which give you even more flexibility in multichannel applications.

* The number of channels that can be used simultaneously depends on local frequency plans.

 Optional microphones for HT 4500

 System components for multichannel systems

 HiQnet®


Consumer Alert (for US users)
Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: The system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device.
Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888- CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC’s wireless microphone website at www.fcc.gov/cgb/wirelessmicrophones

© 2012 AKG Acoustics GmbH

WMS 4500
The wireless receiver shall operate over a 30 MHz UHF frequency range in one of 8 bands from 500 MHz to 863 MHz, with a wide range of possible frequency settings. 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 30 MHz UHF band and offer up to 1,200 discrete operating frequencies within that band. The receiver shall operate on the true diversity principle, and the switching circuit shall be inaudible. Total harmonic distortion at 1 kHz for rated deviation shall be no greater than 0.3%. The receiver shall provide for a manual squelch adjustment as well as an automatic squelch option (tone code squelch) for optimum system operation. Audio output shall include a balanced XLR connector as well as an unbalanced 6.3 mm / 1/4-inch jack connectors. The output from the 3-pin XLR-type connector shall be adjustable in 3 steps (-30, 0, +6 dB). A data port for connecting a pc-controlled network and logic out connector shall be provided. The receiver shall be controlled by a jog wheel and shall provide a backlit color display as well as a programmable LED ring (red/green) showing the overall system status. The wireless receiver shall be the AKG Acoustics Model SR 4500.


The wireless system shall operate over a 30 MHz UHF frequency range in one of 8 bands from 500 to 863 MHz, with a wide range of possible frequency settings. The wireless microphone system shall incorporate factory-optimized sets of both transmission and receiving frequency modules that are programmed into both transmitters and receivers. Each frequency set shall comprise a 30 MHz UHF band and offer up to 1,200 discrete operating frequencies within that band, with transmitter power not exceeding 50 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 120 dB. The transmitters shall indicate input overload via an LED indicator and on a backlit display battery lifetime shall be displayed in hours as well as the transmitting frequency. Handheld transmitters shall have a maximum diameter of 39 mm and a length, including antenna, no greater that 239 mm. The wireless microphone system shall be the AKG Acoustics Model WMS 4500.

Available Frequency Bands: 500-530, 570-600, 650-680, 680-710, 720-750, 760-790, 790-820 und 835-862 MHz
 


Carrier frequency range500 to 530, 570 to 600, 650 to 680, 680 to 710, 720 to 750, 760 to 790, 790 to 820, 835 to 863 MHz
Audio bandwidth35 to 20,000 Hz
THD<0.3% typical
Signal/noise ratio>120 dB(A) typical
ModulationFM
RF radiationmax. 50 mW (ERP)
Battery life2 AA size dry batteries: 15 hours typ.; BP 4000: 12 hours typ.
Dimensionslength: 247 mm (9.7 in.); diameter: approx. 39 mm (1.5 in.)
Net weight125 g (11.3 oz.)
Patent(s)Remaining battery life (Patent no. AT 408.280, GB 2.349.230, US 6,344,730)