September 12th, 2009 · No Comments
I have designed, constructed, and installed a custom bandpass enclosure for an Infinity Perfect 10.1, 10” high-output subwoofer. Reasons for choosing a bandpass enclosure:
1. more efficient compared to a sealed enclosure
2. transient response is second only to a sealed enclosure
3. frequency response is practically flat (± 3dB according to Infinity)
My “pencil” or “birdhouse” design, as seen in Figure 3, took me 9 hours to come up with, and 24 hours to construct excluding any types of breaks, i.e. eating and sleeping. After installing the enclosure and listening to it for a few minutes, it inspired me to do a custom installation in my car and join an IASCA competition.
Kick Panel Enclosures
The custom kick panel enclosures are made out of fiberglass, plywood, and are finished with carpeting. I made the fiberglass mold first, and then attached the plywood speaker baffle with 16 gauge steel wire. These wires were used to adjust the angle of the speakers until the preferred sound was reached, then they were set into place using more fiberglass.
Installation
Head unit
The head unit was installed with a “build-up” kit that was modified drastically to ensure a good fit. Also, the faceplate that came with the head unit left a lot of metal showing, so I made a custom faceplate that looks like vinyl.
Wiring
RCA, power, remote, and speaker wires were installed underneath the carpet. They all run on the driver side of the car, but the power and remote wires run along the far left side; the RCA and speaker wires are run along the right side.
Sound Dampening
Sound dampening mats, like Dynamat, were used throughout the car on the driver-side floorboards, trunk lid, and some of the trunk walls. Expanding foam was also used on the trunk lid to fill some of the large gaps as seen in Figure 4.
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Related Tags: bandpass enclosure, car audio system, carpeting, expanding foam, fiberglass mold, floorboards, frequency response, high output, iasca competition, infinity, kick panel, nissan sentra, panel enclosures, plywood, rommel, sentra, speaker wires, steel wire, transient response, trunk lid