3
4. Clip LED
The red Clip LED indicates that the signal
level is excessive and is causing distortion.
To reduce clipping, turn down the mixer
levels and/or the Master Level controls.
5. Main In / THRU (LINK)
The Main In / Thru (Link) connectors allow
additional powered cabinets to be driven from a
single source. You can Link up to 16 EF-Series
powered cabinets! The Link jacks are also the
correct input to use when driving the EF-Series
powered cabinets with an external mixer.
Tech Note: The Link jacks operate at
line level (+4 dBu) to achieve full power.
When operating from signals that are not
as strong, use the Line inputs of the first
cabinet in the chain. The Link jacks are
high quality balanced inputs with very
good common mode (hum) rejection. To
ensure maximum hum rejection, the proper
balanced cables must be used.
User Tip: Jacks marked Link Output are connected in parallel with the Link Inputs and are
provided for convenience to connect downstream cabinets. Link inputs may also be used as
outputs and Link Outputs may be used as Inputs.
Note: A maximum of 3 EF-Series Control Panel mixers can be used when Linking EF-Series
powered cabinets.
6. Mixer On/Off
This switch turns the internal mixer ‘on’ or ‘off.’ When the Mic or Line inputs are used, this switch
must be set to the ‘on’ position. If these inputs are not being used, the mixer should be turned ‘off,’
this will help prevent the mixer from contributing noise to the system. The internal mixer should not
be used when a source other than another EF-Series powered cabinet (or similar) is connected
to the LINK jacks. Remember, a maximum of 3 mixers, in a chain of cabinets, should be used! A
much larger number of cabinets may be used with the mixers disabled on the additional cabinets.
7. Line Input
Input
The Line inputs allow line level sources such as digital media players (laptops, tablets or smart
phones) and CD players to be connected. A Combi Jack (XLR + 1/4-inch TRS hybrid) and a 1/8-
inch TRS jack help provide great versatility. The 1/8-inch TRS input (RCA on REV1) is set up to
blend stereo sources into mono. The Line input is also balanced to help reject unwanted hum
(when balanced cables are used).
Note: A microphone may be connected to Channel 1’s Combi-Jack but will have lower gain
compared to Channel 2’s Mic input (Phantom power is also NOT available for this input).
Tech Note: Unbalanced operation - When connecting an unbalanced source to the balanced
inputs as on an EF-Series powered cabinet, the best chance for hum rejection is made by
running a balanced cable from the source to the input. The return connection should be
connected to ground at the unbalanced plug. The EF-Series powered cabinet does not connect
AC power ground directly to the input signal ground.
Control
The Line control adjusts the input volume level of devices plugged into the Line input.
Note: You can use the Combi-Jack and 1/8-inch (RCA on REV1) Line level inputs
simultaneously but the relative volumes need to be adjusted at the source.
MIXER
ENABLE
LINE
MI
C
LINE
MI
CM
AIN IN
THRU
MA
STER
LINK
CLIP
LIMIT
Min
Ma
x
Min
Ma
x
Min
Ma
x
MODE
Bluetooth
TM
SUB
100Hz
SMART
CLUB
CONCERT
VOCAL
USER
0
