Zapco Studio X Series - Manual (Page 15)

Speaker Connections
ST-2X
Standard stereo hook-up connects + and-leads from the correct terminal to
each speaker, taking care that no wire or speaker terminal makes contact
with the metal vehicle body.
4Ω Min Load
2Ω Min Load
A bridged 3 channel “mixed mono” mode can be used to run Mids/Highs in
stereo and a Sub in Mono from the same stereo outputs. To maintain proper
impedance you must use passive crossovers (see below) when in mixed mono
configuration. A simple Cap/Coil crossover will work for this set-up, placing a
coil in the woofer
positive (+) lead and caps in the mid/highs (+)
leads.
See your Zapco authorized dealer for more information on mixed mono set-
ups