it will not sound right when not it an enclosure. the mounting depth for that sub is 9.5" minimum.and as far as the power wire. the manual says:
"The 1000/1's “+12 VDC” and “Ground”
connections are designed to accept 4 AWG power
wire. 4 AWG is the only recommended
power wire size for this amplifier.
If you are installing the 1000/1 with other
amplifiers and wish to use a single main power wire,
use 2 AWG or 1/0 AWG main power wire
(depending on the overall current demands of all
the amplifiers in the system).This 2 AWG or
1/0 AWG power wire should terminate into a
distribution block mounted as close to the amplifiers
as possible and should connect to the 1000/1 with
4 AWG power wire."
i would use at least 2 gauge wire and use a distribution block to convert to 4 gauge.it also says to use 100 amp fuse:
"FUSE REQUIREMENTS
It is absolutely vital that the main power
lead to the amplifier(s) in the system be fused
within 18 inches (45 cm) of the positive battery
post connection.The fuse value at each power
wire should be high enough for all of the
equipment being run from that power wire.
If only the 1000/1 is being run from that power
wire, we recommend a 100A ANL (large bladetype
fuse pictured below) be used.
No fuse is required directly before the amplifier
power connection. If one is desired at this
location, we recommend the use of a 100A ANL
fuse for each 1000/1." shawn