Woofer enclosures are the most misunderstood piece of your audio system.
Most customers and some dealers feel a speaker box is just a box.
Twin City knows the enclosure is as important as the woofer you put in it.
We carry G-Force enclosures exclusively — competition proven and custom built. Tuning only the way G-Force can: Loud & Punchy. 

The difference? They both play bass, that's the only similarity. First, the look and finish is a lot cooler, but G-Force is more than a pretty face. G-Force is a competition proven winner in SLAP-DB DRAGS-USAC. Because of the radically different tuning we can get 3 to 4 db more output than the competition. A larger than normal slot port means more port velocity with little to no port noise. If you have the room we have the boom!

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GF-122DF101
Custom extreme tuning slot port down firing enclosure, illuminated plexi window with custom engraved logo. Designed for dual 12" woofers. Also available in dual 10" and dual 15".

GF-101VYNL
12" High output tuning dual slot port enclosure with vinyl replica insert. Also available in 10" and-15" and dual 10", 12" and 15".

GF-106W7
10" High output tuning slot port enclosure designed for JL 10W7 with brushed aluminum insert. Also available in 13", and dual 10", 12" and 13".

GF-101
12" High output dual slot port enclosure with brushed aluminum trim. Also available in 10" and 15, and dual 10", 12" and 15".

GF-128
Dual 12" sealed enclosure with brushed aluminum insert. Also available in dual 10" and 15".

GF-105
12" High output tuning slot port enclosure with replica fabric insert. Also available in 10" and-15" and dual 10", 12" and 15".

GF-105SU
12" High output tuned enclosure with West Coast red suede insert. Also available in 10" and 15" and dual 10", 12" and 15".

GF-105SU
12" High output tuned enclosure with West Coast gray suede insert. Also available in 10" and-15" and dual 10", 12" and 15".

GF-101
12" High output tuning dual slot port enclosure with gray insert. Also available in 10" and 15" and dual 10", 12" and 15".

GF-139
10" High output tuning slot port enclosure. Designed for a 10" woofer. With brushed aluminum insert. Also available in 12" and-15" and dual 10", 12" and 15".

GF-139
10" High output tuning slot port enclosure. Designed for a 10" woofer. With gray carpet insert. Also available in 12" and 15" and dual 10", 12" and 15".

GF-112
Custom extreme tuning slot port down firing enclosure. Illuminated plexi window with custom engraved logo. Designed for 12" woofer. Also available in 10" and-15" and dual 10", 12" and 15".

GF-173
Sealed enclosure with replica fabric. Bullet trim designed for dual JL 13W1-13W3. Available in 10", 12" and-15" and dual 10", 12" and 15".

GF-139
10" high output tuning slot port enclosure. Designed for a 10" woofer. With brushed aluminum insert. Also available in 12" and-15" and dual 10", 12" and 15".

GF-154
15" High output tuning slot port enclosure. Designed for a 15" woofer with brushed aluminum insert.

GF-129
12" High sealed enclosure with replica fabric. Also available in 12" and-15" and dual 10", 12" and 15".

GF-130
Dual 12" slot port high output tuning enclosure with replica fabric. Also available in 12" and-15" and dual 10", 12" and 15".

GF-116
Dual 12" extreme tuning slot port enclosure. Also available in dual 10" and 15".

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