Installation; Connection Input; Jack Inputs (Balanced Signals); Jack Inputs (Unbalanced Signals) - Optimus MT-1500 Installation And Operating Instructions Manual

Use good quality shielded input cables and XLR plugs, along with good soldering technique, to
ensure trouble free reliability.

3.6 Installation

All input sockets and output posts are located at the rear panel. Special attention is needed when
selecting Signal Socket, turn gain control to the minimum.
Qualified service personnel are required for all servicing of internal parts.
Manufacturer is not responsible for any accidents arising from a user misuse.

3.7 Connection input

The balanced phone jack inputs have a nominal impedance of 20 kΩ (10 kΩ unbalanced wiring)
and will accept the line level output of most devices. Three-pin female XLR connectors are also
available. Next figures provide examples of recommended connection techniques for each type of
signal source.
3.7.1

Jack inputs (balanced signals)

Tip - "Hot" (+ signal)
Ring - "Cold" (- signal)
Sleeve - Ground
3.7.2

Jack inputs (unbalanced signals)

Tip - "Hot" (+ signal)
Sleeve - Ground
3.7.3

XLR inputs (balanced signals)

Pin 1 - Ground
Pin 2 - "Hot" (+ signal)
Pin 3 - "Cold" (- signal)

3.8 Connecting outputs

Speakers can be connected using Banana plugs, Speakon plugs, or bare wire to the binding posts
on the rear panel of the amplifier. Consult the wire gauges for different load impedances and cable
lengths.
The red binding posts are considered hot, connecting to the positive poles of speakers, while the
black binding posts are signal ground, connecting to the negative poles of speakers.
Never connect a hot (red) output to ground or to other hot outputs! Always turn off the amplifier
before making connections!
MT-1500 / MT-3500 Version 1.0
MT-1500 / MT-3500
Power Amplifiers
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