101
Application 3: Bi-Amplified Mains + Aux-Fed Subs
This application is suited for use with a system consisting of bi-ampable 2-way main speakers and aux-fed subs. If you’re not
familiar with the term “aux-fed subs”, here’s a brief explanation. The idea is to use an available post-fade/post-EQ aux send
from the mixing console to feed only the channels which contain low-frequency information (e.g., bass guitar, kick drum, floor
tom, etc.) to the subs. This is accomplished by simply raising the aux send for each mixer channel you wish to send to the subs,
just as you would with stage monitors. Some of the benefits provided by an aux-fed sub configured system are: (a) ultra-clean
and tight bass reproduction, beyond what can be accomplished using the mixer’s channel high-pass filters alone, (b) significant
reduction of low-frequency “stage rumble” and “mud” caused by microphone leakage, and (c) plosive consonants from vocals
are no longer reproduced by the subs.
Keep in mind that using an aux-fed sub configuration can complicate other aspects of using the system. For example, the
master faders will no longer control the subwoofer levels, so when altering master system level, both the master fader and
aux-sub aux send master control will have to be altered equally to maintain the relative levels between the main and sub
speakers. Note that care should be taken to prevent such alteration of the relative levels between the subwoofer and main
speaker, as this can alter the frequency and phase response of the system.
Application Notes:
• Make sure your mixer and amplifiers (or powered speakers) are turned off before making connections.
• Make connections as described in
‘Making Connections’ on page 4
then apply power to the system according
to the instructions described in
• Press the
WIZARD
button then run the Setup Wizard and follow the on-screen instructions. Or, if you know your
speakers and amps aren’t listed in the Setup Wizard, you can simply load preset 85 and start from there.
1
2
1
2
High Amp
1
2
1
2
Low Amp
1
2
1
2
Sub Amp
or
or
R L
A1
Wireless Router
Windows
®
or Mac
®
Computer
iOS
®
or Android™
Tablet
or
or
Left Sub Speaker
Right Sub Speaker
Left Bi-Amped
Main Speaker
Right Bi-Amped
Main Speaker
High
Low
High
Low
LEGEND
Left Channel
L
R
Right Channel
Center Channel
C
Aux Channel
A
Channel 1
1
2
Channel 2
Ethernet Connection
Wi-Fi Signal
Analog Audio Connection
Optional
Mixer
