The Input/Output connections in the back of your cabinets are wired in
parallel. If you daisy chain two 8-ohm cabinets, you will have a total
impedance of 4 ohms. If your amp minimum load is 4-ohms, it means that
you can use two 8-ohm cabinets or a single 4-ohm cabinet. In either event,
be sure to wear proper ear protection - the TOUR cabinets and Epifani
amplifiers are very loud, high-fidelity products.
When using multiple cabinets, be sure they are all in “phase”. With a 9V
battery (the same battery used inside most active basses) you can test the
polarity, or phase, of your speakers to make sure all are working and
moving in the right direction: forward! Sometimes, when you daisy chain
two cabinets, you will note a lack of bass response. Typically, this means
that one of the cabinets is out of phase and its speakers are moving
backward when they should be moving forward. If one cabinet or one
speaker is moving backwards when the other moves forward, they will
cancel each other out. You can readily notice this when a single cabinet
has more bass and better response then when two are connected.
Here’s how to verify phase: Take a 1⁄4” cable. Insert one side into a cabinet
and touch the other tip of the 1⁄4” jack to the “+” of a 9 volt battery and the
shaft to the “-” of the battery. The connected speaker should move forward
when this connection is made. If it does, the cabinet is in phase. If it moves
backwards, you have a cabinet that’s wired out of phase. The problem can
be easily corrected by a speaker technician.
Lastly, the positioning of your cabinet in the room makes a significant
difference on the sound you hear. As you move closer to the rear wall or
corners, you will
hear more bass, but you might lose some midrange clarity. Each room is
different
and you may not have the ability to move to the best spot. However, a few
inches in either direction can give you the sound you desire.
