4
IMPROTANT NOTE:
DO NOT
use a light gage
shielded instrument type cable
to
connect your amplifier and speaker together. This will cause very poor performance
and may even cause the amplifier to oscillate and distort. Always use a good quality,
heavy gauge speaker cable 16 gauge min. or preferably 12 - 14 gauge cables for the
best results.
Output connections
:
We use NL-4 type connectors. NL-2 type and NL-4 type
cables are both acceptable. Note that the +1/+2 pins are connected together as are -1/-
2 on both the NL4 connectors in your cabinet. This is to allow you to get the lowest
impedance possible in your cable connection for best bass response and peak power
delivery.
We also provide a ¼” connector for
temporary short term emergency use
only.
The ¼ connector should not be used in place of the NL4 connections for normal
operation.
The ¼” jack cable has a much lower current rating and will not perform as
reliably as the NL4 type connector.
Output power ratings:
The 1350 can put out a full
1350 watts RMS into 4
Ω load
.
It will put out the same amount of total power into a 2
Ω load. Even though it will
operate into that low an impedance load,
we do not recommend
a 2
Ω load for standard
configuration. The 1350 is designed to work most efficiently and effectively into a 4
Ω to
8
Ω load configuration.
Front Panel Controls and Features
Note: Level Controls go from what the incoming signal level is, down to off. Gain
Controls can amplify the incoming signal level to a much higher level.
Lower Control group
Main Signal Input Jack
The Main signal input is located on the left side of the front panel. It is a standard ¼
jack configured for monaural operation. The input impedance is 500K Ohms.
Please
note:
The rear input jack connection switches through the front input jack. They can
each be used separately but not together at the same time.
Mute To Tune
The Mute to Tune switch is green in the normal on or (out) position. When pressed in
(Mute is engaged) the switch will change color to red indicating the mute is engaged,
and the audio signal is no longer going to the output amplifier. The Tuning Jack on the
rear panel retains signal. The DI will not have signal present at its output when the
Mute is engaged.
Gain Control