T1 Audio Custom Subwoofer Boxes and Enclosures

T1 Audio buying guide for 2026

T1 Audio designs and manufactures vehicle specific subwoofer enclosures, custom speaker pods and stealth amp racks in the UK. Every box is CNC cut from premium MDF, lined for acoustic damping and shaped to drop straight into a model specific space such as a VW Golf spare wheel well or a BMW 1 Series boot side. This guide walks you through the T1 Audio range we stock at Bass Junkies so you can pick the right enclosure for your car and your sub.

T1 Audio vehicle specific subwoofer boxes

The flagship T1 product line is vehicle specific subwoofer enclosures. These slot precisely into a factory cavity without losing boot space or modifying trim, and they keep the sub level and sealed for consistent SPL.

• Volkswagen Golf Mk7 Mk8. Spare wheel well sub box, 10 inch sealed, OEM trim friendly.
• Audi A3 8V 8Y. Boot side sub enclosure, 10 inch sealed, retains floor flat.
• BMW 1 Series F20 F40. Boot side panel sub. Fits 10 inch shallow mount drivers.
• Vauxhall Corsa D E F. Boot floor sub box, 10 inch sealed, daily driver friendly.
• Ford Fiesta Mk7 Mk8. Custom spare wheel well replacement housing a 10 inch sub.

Custom speaker pods and amp racks

Beyond subs, T1 Audio also produces door speaker spacer rings, A pillar tweeter pods and boot mounted amp racks. The amp racks turn a tatty boot into a clean show finish without losing usable space.

• Speaker spacer rings. MDF spacers that mount 6.5 inch components in factory door pots.
• A pillar tweeter pods. Custom pillars for raising tweeters to ear level in saloons and hatchbacks.
• Underseat sub baffles. Mounting boards for 8 inch underseat subs in vans and 4x4s.
• Boot amp racks. Carpet or vinyl wrapped racks for one or two amps and DSP.

Recommended subwoofer pairings

T1 Audio enclosures are tuned for sealed alignments, which suits SQ focused subs more than chest punching SPL drivers. The classics pair well across the range.

• JL Audio 10W3v3 or 10W6v3. The benchmark daily driver sub for T1 sealed boxes.
• Pioneer TS A or TS D. Affordable 10 inch sub that runs cleanly in T1 sealed builds.
• Alpine S2 W or R2 W. Strong SPL within a sealed alignment, popular daily upgrade.
• Hertz ES or DS. Italian SQ subs that suit the T1 OEM grade installs perfectly.
• Vibe Pulse or BlackAir. Budget conscious 10 inch sub for first build T1 boxes.

Brand quality at a glance

Bass Junkies stocks T1 Audio alongside the wider custom enclosure brand set so you can compare fitment, finish and pricing in one place.

• T1 Audio. UK designed and built. Strongest vehicle specific OEM grade finish on the market.
• Audiomobile. European prefab enclosures, broader vehicle coverage.
• Q Power. Budget conscious universal MDF enclosures for older cars and vans.
• JL Audio Stealthbox. American premium alternative for select US models.

Compatibility and fitting

A T1 enclosure install needs the right wiring, mounting and protection to keep your boot tidy and your sub safe.

• Power cable kit. OFC cable from battery to amp with in line fuse near the battery.
• Sub wire. Correctly polarised speaker cable from amp to sub terminal cup.
• RCA leads. Twisted pair RCA from head unit or DSP to amplifier.
• Boot carpet. Vinyl wrap or carpet to finish the box edges and protect the trim.
• Mounting hardware. Self tappers or velcro pads to secure the box to the floor.

How to choose your T1 Audio enclosure

Start with the car. Confirm the model and year against the T1 fitment listing before you choose a sub. From there, pick a sub that suits your taste. Sealed T1 boxes reward SQ first drivers and tighten kick drums. If you want SPL above SQ, look at the JL W6 or Hertz ES rather than smaller budget drivers. Match the amp to the sub's RMS rating and you will get a clean install that lasts.

Why buy from Bass Junkies

Bass Junkies has been fitting T1 Audio subwoofer boxes in the UK since the brand launched. Our Wolverhampton workshop holds T1 enclosures for the most popular VW, Audi, BMW, Ford and Vauxhall fitments, and we test fit before we ship so you do not waste time on the driveway. Call 01902 863 005 for advice on the right T1 box and sub combination for your car.