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Woofer Construction: This MB
Quart Premium Series woofer is equipped with a treated paper diaphragm with an inverted
parabolic polypropylene dust cap and a Santoprene synthetic rubber, inverted roll surround.
Basket: The PWE 254's motor
structure is supported by a high-strength, non-resonant cast alloy basket.
Kapton Voice Coil Former:
Kapton is a highly temperature-resistant, completely non-magnetic plastic foil.
Because it has no affect on the magnetic field, the woofer provides more
precise, distortion-free music reproduction.
Speaker Terminals: This
dual-voice-coil subwoofer has a unique speaker terminal which can accept up to
10-gauge wire. The one-piece terminal block holds the speaker wire in place
using set screws (2mm Allen wrench supplied). A plastic cover protects the
terminal strip from unwanted contact.
Wiring: The woofer can be
connected in the following ways:
- Standard: You can connect
the woofer to two separate amplifier channels, and each channel will see a
4-ohm load. Connections are made to the woofer's +1, +2, -1, and -2
- Parallel: You can connect
the woofer to a single amplifier channel which will see a 2-ohm load.
Connections are made to the woofer's +1, and -2 terminals. Two supplied
short terminal jumpers are attached to the terminal block to link together
the two positive terminals and the two negative terminals.
- Series: You can connect
the woofer to a single amplifier channel which will see an 8-ohm load.
Connections are made to the woofer's +1, and -2 terminals. The supplied long
terminal jumper is attached to the terminal block to link together the +2
and -1 terminals.
Logo Badge: The self-adhesive
MB Quart Premium Logo badge can be mounted on the top of the screw cover ring in
Enclosure Recommendation: MB
Quart recommends a sealed enclosure with an internal volume of 0.75 cu.ft. for
Mounting Recommendations: The
PWE 254 can only be top-mounted into the enclosure. The supplied self-adhesive
rubber gasket should be placed on the woofer to ensure a tight seal. No mounting
hardware is included, however, MB Quart recommends M5 hex-head screws and lock
nuts. After installation, the supplied screw cover ring can be fitted to the
woofer's outer ring for a custom look.
- Power Handling: 400 watts
RMS (200 watts per voice coil)
- Mounting Height: 0.298"
without cover ring, 0.597" with ring installed