[Pivanist]

Так цепляете то как? каким коннектором?

Вот цитата из мануала. Все предельно понятно.

The Q-SUB cabinet is fitted with a pair of EP5 connectors. All five pins of
both connectors are wired in parallel. The Q-SUB uses the pin
assignments 3/4 and 5. Pin 5 is used for SenseDrive (only available
when using a D12 amplifier and 5-wire cabling). Pins 1/2 are
designated to Q-Series full range systems. Using the male connector as
the input, the female connector allows for direct connection to
additional loudspeakers.
The Q-SUB can be supplied with NL4 output connectors as an option.
The D12 SenseDrive function is not available when using NL4
connectors. Pin equivalents of EP5 and NL4 connectors are listed in the
table below.