JL Audio C1-650 Owner's Manual

5

C1 tweeters have been designed for surface 

or flush-mounting. Before choosing a method, 
carefully inspect the desired mounting location 
to determine which method will work best.

Surface-Mount: uses the supplied surface-

mount fixture and requires the drilling of three 
holes (one for the wires and two for the mounting 
screws). This application is useful when mounting 
the tweeters to a panel that has insufficient clearance 
behind it for the tweeter’s magnet structure.

Flush-Mount: yields a custom-installed 

appearance and requires a 1-1/2-inch (38 
mm) diameter hole to be cut in the vehicle 
panel, with at least 0.40-inch (10 mm) of 
clearance behind the mounting surface for 
the tweeter and up to 1.45-inch (37 mm) for 
the stud bolts used to mount each tweeter. 

The C1 crossover networks are equipped with 

an advanced electronic tweeter protection circuit 
designed to minimize the possibility of tweeter 
failure. This electronic device monitors current going 
to the tweeter and will disconnect the tweeter from 
the signal when it senses overload. Should this occur 
while listening to the audio system, simply reduce the 
volume for a few seconds and the protection circuit 
will reset itself automatically.

The crossover networks supplied with your C1 

System should be installed in a dry location inside 
your vehicle. DO NOT INSTALL THEM INSIDE 
OF A DOOR! Doors often get wet on the inside, 
which can damage your crossover networks and 
could potentially damage your entire sound system. 
Use plastic cable ties or a similar fastener to securely 
mount each crossover to avoid coming loose in the 
event of a collision, sudden jolt or repeated vibrations 
during normal use. Make sure that your mounting 
location will not cause damage to wiring or any other 
vital component of your vehicle.

Run the wire leads from the crossovers to  

the tweeter mounting locations and to the speaker/
amplifier outputs. Then connect the harness wire 
leads to the speaker/amplifier outputs and tweeters, 
observing correct polarity. See Diagram C below  
for details.  

From Woofer

or Amplifier

Tweeter Crossover

Tweeter