Setup - HPA QA4150 Owner's Manual

Setup

Setup
Mode Select
PARALLEL
Stereo Mode
In this mode, each channels operate inde-
pendently (typical quard amplifier). Channel 1
input signal feeds channel 1 power amp, and
channel 2 input signal feeds channel 2 power
amp (channel 3 and 4 are operate same as
channel 1 and 2 ). In this mode, the minimum
speaker impedance per channel is 4 Ω
Parallel Mode
In this mode, channels 1 and 2 are operate
two mono amplifier. In this mode channel 1
input signal feeds channel 1 and channel 2
power amp, the minimum speaker impedance
per channel is 4 Ω. Also, channel 3 and 4 are
operate same as channel 1 and 2.
Bridged Mono Mode
In this mode, channels 1,2 or 3,4 are bridged
together and work as one mono amplifier. In
this mode, the minimum speaker impedance
is 8 Ω (Caution: In this mode, channel 2 and 4
volume is set maximum position (0)).
8
BRIDGED
STEREO
Note : Bridged mono mode is to be used only
when the QA Series is connected to a 8 ohms
speaker load. Use of Bridged mode with
speaker loads of 8 ohms or less can result in
severe damage to the unit due to excessive
heat and current limiting.
Use extreme caution when operating the am-
plifier in Bridged Mono Mode. Never ground
either side of the speaker cable when the am-
plifier is in Bridged Mono Mode ; the speaker
load must " float " away from the amplifier
chassis.
QA4150 / QA4300