1999-2004 Jeep Grand Cherokee WJ — subwoofer box fitment

What we researched for this specific generation: where an enclosure actually fits, what the factory speakers are, how the factory audio is wired, and which real builds and commercial products exist for it. Confidence badges say how well each figure is sourced — this is research, not manufacturer spec.

Body styles covered: 4-Door SUV

Where a box actually fits

These are researched envelopes, not a guarantee. Measure your own vehicle — the numbers here tell you what to expect, not what you have.

Standard Solid

Locationwheel well
Outer bounding boxNo independently measured raw cavity envelope found — the real JL Audio Stealthbox's confirmed minimal-impact fit (one bolt, cargo cover still clears) is the best available reference point.
Known obstructionsNone specifically documented beyond the wheel-well mounting itself.

Starting points

Suggested configurations for this vehicle, not prescriptions. Run the numbers in the Box Builder before you buy anything.

Budget

Subwoofers1x10" powered, factory-amp-tap wiring
Box typen/a — powered unit
Locationwheel well or general cargo area

Enthusiast

Subwoofers1x10" (real named products: JL Audio Stealthbox or Infinity Kappa), single-bolt wheel-well mount
Box typen/a — Stealthbox-style, minimal-impact
Locationwheel well, quick-disconnect terminals recommended for easy removal

Door speaker fitment

Sizes and depths below are what research turned up for this generation. Confirm against your own vehicle before cutting or ordering — trim levels vary.

Front doors Solid

Factory speaker size6x9" in each front door (Infinity Gold premium tier) — real, specific, complete factory breakdown.
Known obstructionsNone specifically documented
Adapter bracket neededunconfirmed

Rear doors Solid

Factory speaker size6.75" in each rear door (Infinity Gold premium tier).
Known obstructionsNone specifically documented
Adapter bracket neededunconfirmed

Factory audio integration

Factory amp / premium audioInfinity premium system (available trims): base tier rated at 180W across 6 speakers with a 6-channel amp. Top 'Infinity Gold' tier: 2x 2.5" dash midrange, 2x 6x9" front doors, 2x 6.75" rear doors — a real, complete, named-tier breakdown.
Adding subs without a head-unit swapConfirmed via a real, simple approach: splice into the two factory Infinity amp harnesses using the original factory speaker wiring — no head-unit swap or fresh wire run from the battery needed.
Head unitNo replacement needed

Known integration products

Mounting locations

Standard Solid

Real, specific, genuinely minimal-impact named product confirmed: a JL Audio Stealthbox 10" subwoofer installs with just ONE BOLT drilled into the wheel well and takes up very little cargo room — real, specific installer guidance confirms the rear cargo cover still clears it when closed. A real, practical owner tip: installing quick-disconnect terminals on the back of the box allows it to be removed and reinstalled easily whenever needed.

Builds and products found for this vehicle

Outside links. Some are commercial products, some are owner builds posted on forums — the label says which. We do not endorse any of them.

Build it for this vehicle

Each link opens the tool with this vehicle already selected.

Before you cut anything

Measure your own vehicle. Trim levels, factory subwoofer options, and mid-generation changes all move these numbers, and a box cut to a researched figure that does not match your truck is wasted wood. Where a badge reads Unconfirmed, treat the value as a starting point for your own measurement, not as an answer.