Description Lectrosonics DMTH4 DIGITAL TELEPHONE HYBRID The Lectrosonics DMTH4 is a professionally designed 3-input, 24-output matrix mixer, that is capable of allowing for connecting telephone lines, video codecs, that comes along with other audio sources, into the digital bus structure of DM Series processors. The unit comes treating the "non-regular" audio sources as if they were microphone or line inputs, it comes along with DSP available on both input and output, this includes filters and compression. Up to 128 macros can be stored in internal memory. The unit is made suitable for sound reinforcement applications, courtrooms, recording in boardrooms, worship centers, distance learning systems and hotels, and wherever teleconferencing is a part of the system requirements. It is capable of tackling the issue of echo being heard at the originating source (the "far end"), due to the signal from loudspeakers entering microphones at the local room, and being sent back to the "far end" location. Extensive control capability is made available that comes along with an intuitive command structure for allowing the control with USB or RS-232 connections. The included LecNet2 software is a Graphic User Interface (GUI) designed for allowing the easy setup and monitoring of DM components with the use Windows 2000 or XP computer systems. LecNet2 that comes including the necessary Control Panels for configuring and monitoring all the DM series products plus the Venue Modular Receiver system. 3-input/24-output digital matrix processor in a stackable configuration Fully integrates with DM Series processors Telephone, codec and auxiliary inputs and outputs Two acoustic echo cancellers - 126 mSec tail time Line echo canceller - 30 mSec tail time Six filters plus compressor on each input Six filters and compressor/limiter on each output USB and RS-232 interfaces for setup and comprehensive remote control Fully balanced audio signal flow throughout entire system Digital I/O ports for "daisy chaining" and to connect other LecNet 2 devices Proportional gain auto mixing algorithm with AutoSkew Simultaneous LecNet2 software and third-party control Specifications Frequency Response 20Hz to 20kHz Dynamic Range Input: 102dB (unweighted 20Hz to 20kHz)Output: 105dB (unweighted 20Hz to 20kHz) Inputs 5-pin Phoenix Outputs 5-pin Phoenix Other Connectors 6 x RJ-45 Expansion2 x RJ-11 jacks1 x DB-25 Logic I/O1 x USB1 x 1/8" TRS Stereo Mini Serial Input Impedance 10kΩ Output Impedance 450Ω differential @ 0dB attenuation5Ω differential @ -40dB attenuation Maximum Input Level +20dBu Maximum Output Level +20dBu Sample Rate 48Khz Phantom Power No Crosstalk Line Level -103 dBMic Level -101 dB THD + N 0.02%, nominal input level Dimensions (WxDxH) 19 x 7.5 x 1.7" (483 x 191 x 43mm) Weight 3.5 lbs (1.6 kg) Specialties Integrates telephone lines, video codecs and external audio sources into the digital bus structure of DM Series processors
