L-acoustics MTD108 LLCa

Kenmerken

Conditie: Zo goed als nieuw

Type: Audio

Beschrijving

L-acoustics MTD108LLCa
The MTD108LLCa line level controller is an analog signal processing unit that optimizes the performance of the MTD108a. The stereo controller accepts two signal inputs and provides two processed outputs for the respective input channels. The main functions of the MTD108LLCa controller are as follows:

- Bandpass filtering and equalization (3 modes, selectable)
- Sense Return processing for thermal protection of speaker components and cone excursion limiting (voltage and frequency dependent)
- Mono input summation for subwoofer or center fill drive
- Crossover filtering, equalization for subwoofer drive
- Three different equalization/bandpass filtering modes tailor the frequency response of the MTD108a for different applications.

In MONITOR mode, high pass filtering is set at 80 Hz with a 12 dB/octave slope in order to provide an equalization contour suitable for speech reinforcement or floor monitor applications.

In FRONT mode, a 50 Hz high pass filter is employed and low frequency shelving equalization provides a contour more suitable for full bandwidth music applications.

In X-OVER mode, a 125 Hz high pass filter is applied and there is no low frequency shelf since the MTD108a is intended to be used with subwoofers.

When the second front panel switch is set to SUB mode, the mono output on the rear of the controller provides a summed output of the two signal inputs with low pass filtering set at 125 Hz and equalization optimized for the SB115 subwoofer (equalization for the SB118 or SB218 are selectable via internal jumpers).

Alternatively, the summed MONO signal output can be used to feed a power amplifier allotted to a central fullrange fill loudspeaker (SUM mode). In terms of connection, two input signals (Ch 1, 2) are applied to the line input XLR connectors on the front panel of the MTD108LLCa. Rear panel XLR line outputs (Ch 1, 2) are connected to the power amplifier inputs with the amplifier outputs then connected to the Controller "Sense Return" input Speakon connector (Ch 1 = 1+/1-, Ch 2 = 2+/2-). Since the amplifier is connected in a loop, LLC sense return protection circuitry can monitor the signal applied to the loudspeakers and provide thermal protection of speaker components plus voltage- and frequency-dependent cone excursion limiting provided that the power amplifier has a gain of 32 dB. The front panel of the MTD108LLCa is then used as a patch panel with Ch 1, 2 loudspeakers connected via the two 4-pin Speakon connectors provided.

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