Lectrosonics DMTH4 Digital Telephone Hybrid

Lectrosonics DMTH4 - Digital Telephone Hybrid

Lectrosonics DMTH4 - Digital Telephone Hybrid

B&H # LEDMTH4 MFR # DMTH4
Lectrosonics DMTH4 Digital Telephone Hybrid

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  • 1Description

The DMTH4 from Lectrosonics is an 3-input, 24-output matrix mixer, that allows for connecting telephone lines, video codecs, along with other audio sources, into the digital bus structure of DM Series processors. The unit treats the "non-regular" audio sources as if they were microphone or line inputs, with DSP available on both input and output, including filters and compression. Up to 128 macros can be stored in internal memory.

The unit is suitable for sound reinforcement applications, recording in boardrooms, courtrooms, worship centers, distance learning systems and hotels, and wherever teleconferencing is part of the system requirements. It tackles 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 available with an intuitive command structure to allow control with USB or RS-232 connections. The included LecNet2 software is a Graphic User Interface (GUI) designed to allow easy setup and monitoring of DM components using Windows 2000 or XP computer systems. LecNet2 includes the necessary Control Panels to configure and monitor 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
In the Box
Lectrosonics DMTH4 - Digital Telephone Hybrid
  • AC Power Cable
  • 2 x 12" CAT-5e Cables with RJ45 Connectors
  • 2 x DB9 to TRS (Stereo Mini) Cable
  • USB Cable
  • 5-Pin De-Pluggable Connectors
  • Software CD-ROM
  • One (1) Year Warranty
  • Table of Contents
    • 1Description
    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 Expansion
    2 x RJ-11 jacks
    1 x DB-25 Logic I/O
    1 x USB
    1 x 1/8" TRS Stereo Mini Serial
    Input Impedance 10kΩ
    Output Impedance 450Ω differential @ 0dB attenuation
    5Ω differential @ -40dB attenuation
    Maximum Input Level +20dBu
    Maximum Output Level +20dBu
    Sample Rate 48Khz
    Phantom Power No
    Crosstalk Line Level -103 dB
    Mic 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
    Packaging Info
    Package Weight 9.25 lb
    Box Dimensions (LxWxH) 24.2 x 14.4 x 6.4"

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