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The LH1000 amplifier is constructed using two 500 watt power cores. Depend-
ing in the position of the BRIDGE mode switch, the amplifier can run in Dual
Parallel mode, or Bridge mode. In Dual Parallel (BRIDGE mode switch to the
left), the two amplifier channels are receiving the same input signal from the
pre amp, but are operating separately, so each channel sees its own speaker
load. In BRIDGE mode (Bridge mode switch to the right), the two amplifier
channels work as one and therefore, a single impedance load from the con-
nected speakers is presented to the amplifier.
Always be sure to check the manufacturers recommended power handling of
your speaker cabinets to match the best impedance load and power output
ratings.
If you are using the LH1000 with a single cabinet of 4 ohms or 8 ohms, set the
BRIDGE mode switch to BRIDGE and use a standard Speakon cable to connect
your cabinet.
If you are using the LH1000 with two 8 ohm cabinets you can use the LH Series
in Bridge mono or Dual Parallel.
If you are using two 8 ohm cabinets as a 4-ohm single load, switch the BRIDGE
mode to BRIDGE and use a Speakon cable to connect your first cabinet, then
use the cabinet's extension output to connect the second cabinet.
If you are using two 8 ohm cabinets in Dual Parallel mode, be sure the BRIDGE
mode switch is in the off (left) position and make your connections using both
channel A and B 1/4-inch output jacks.
If you are using two 4 ohm cabinets, you MUST use the LH1000 in Dual Parallel
mode (BRIDGE switch off to the left) and connect one to each channel of the
LH1000 using the 1/4-inch phone jacks.
Using LH1000’s BRIDGE and Dual Parallel Modes
