Specifications

9
ESL/WOOFER PHASING
The ESL and woofer leave the factory in-phase with each other when the ESL is driven by a non-inverting amplifier.
Most amplifiers are non-inverting (a positive input signal produces a positive output signal, not a negative one). As
long as you connect the positive (red) terminal of the ESL to the positive (also probably red) terminal on your
amplifier, and the red terminals on the bass amplifier to the red terminals on the woofer, the ESL and woofer will be
in-phase.
If you have an inverting amplifier, the drivers will be out-of-phase when connected as described above.
Out-of-phase drivers have a very subtle, adverse effect on the sound.
Because you probably do not know if your amplifier(s) are inverting or not, it is best to test the system for phasing.
First, listen to the speakers as they are currently wired. Then reverse the leads to either the ESLs or woofers (but
not both), and listen carefully. Probably you will have to reverse the leads several times to hear any difference. If
you do hear a difference, choose the phase that sounds the best to you.