Passive subwoofers are no different than active subwoofers, with the obvious exception being that active woofers have integrated amplifiers built into their enclosures. With the proper tools, you can convert passive subwoofers into active designs. This has advantages in terms of placement flexibility, power optimisation and compactness. The majority of the conversion project's effort involves prep.
- Skill level:
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Things you need
- Plate amplifier
- Measuring tape
- Screwdriver (Philips, Allen)
- Handheld reciprocating saw
- Painter's tape
- 3/16 drill bit
- Philips wood screws
- Philips bit attachment
Measure the cutout needed for the plate amplifier. If dimensions are not provided, use the measuring tape to measure 1/2 inch from the edge of the plate. Mark the corresponding cutout on the back of the sub's enclosure with painter's tape. This helps prevent splintering from enclosures made of particle board, or if the sub is covered with veneer.
Remove the screws holding the driver using the appropriate screwdriver. Remove the driver and any stuffing present inside the cabinet that may impede the saw's blade.
Drill a hole at one corner of the meeting point of two of the pieces of painter's tape. Insert the blade of the reciprocating saw into the hole, and cut out the plate amp's opening.
Insert the plate amp. Secure it in position using the drill, wood screws and Philips bit attachment.
Partially insert the subwoofer driver into its cutout. Slide the female terminals on the wires leading from the plate amp onto the male terminals on the subwoofer driver. Screw the screws holding the driver in to seal it in position.
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