Land Cruiser Subwoofer: Under-Seat Sub With a Plug and Play Amp

A Land Cruiser subwoofer used to mean giving up part of the cargo floor to a box. On this 2024 Toyota Land Cruiser we went a different way: a plug and play amplifier behind the dash and a compact powered sub tucked completely under a seat, with zero factory wires cut and every piece removable if the owner ever wants to go back to stock.

Short answer: the Beat-Sonic ENA-3T3 plug and play amplifier kit with subwoofer output plugs in behind the Land Cruiser's head unit and gives you RCA outputs plus a remote turn-on lead. That is the signal a powered under-seat sub needs. Add a fused power run to the 12V battery and a good chassis ground and you have real bass without losing cargo space.

Why the Land Cruiser Subwoofer Needs an Amp With a Sub Output

The factory Toyota stereo does not hand you a clean subwoofer signal to tap. That is the whole reason most people think a sub means splicing into speaker wires. We explain the background in why Toyota systems have no subwoofer output and the fix.

The ENA-3T3 solves it at the head unit. It plugs into the factory connectors, powers the door speakers, and adds RCA outputs and a remote lead for a sub. The product listing covers the 2024 to 2027 Land Cruiser with or without JBL. If your Land Cruiser has JBL and you want the sub to follow the factory volume, the Encore Boost is the better pick. See the FAQ below. Every vehicle-specific kit we make is in the amplifier collection.

The parts used in this build

• Beat-Sonic ENA-3T3 plug and play amplifier kit
• Kicker HS10 Hideaway 10 inch powered subwoofer (46HS10), a third-party sub
• Power wire with an inline fuse, a ground lead, ring terminals, zip ties and double-sided 3M tape for the bass knob

Step 1: The Amp Behind the Head Unit

The team pulled the radio, connected the ENA-3T3 harness and listened for the click on every connector. Instead of leaving the amp where it first sat, we relocated it lower in the dash where it had room.

Before you plug back in, set the gains. On this Land Cruiser we used:

• Front gain: about the 1 o'clock position
• Rear gain: left at the 12 o'clock factory default

Those are our starting points for this truck, so adjust by ear afterward. If your Land Cruiser has JBL and you want to go deeper on gain balance for the door speakers, our Land Cruiser JBL gain setup covers the reasoning.

Photograph the factory connectors first

This tip came straight from the install. The moment the head unit comes out, take a picture of every connection. Before anything goes back together, check each factory connector is plugged in and clicked. Never skip it. One loose plug is how a quick install turns into a second teardown.

Step 2: Run Remote and RCA to the Sub

From the amp kit, two things go to the sub: the remote wire and the RCA outputs. The remote connects blue to blue. Eric routed the remote lead, the RCAs and the ground together along the passenger side of the truck.

Use the pockets under the trim

A lot of the Land Cruiser's trim covers pop off with tabs, and underneath there are small pockets of open space. Those pockets are the route. Wires go underneath, out of sight. On the passenger side the team removed a small screw inside the kick area, pulled the kick panel off its clips, and pried out the next plastic panel with a trim tool. From there the cables run behind the metal bracket behind the dashboard and over to the amp.

Pull through as one bundle

Zip tie the cables into one clump before you pull them through a tight spot. That way nothing comes off line or gets left behind halfway. There is also an opening near the center of the seat that the team used to get through, coming out where the vent is.

Step 3: Power, Fuse and Ground

The power wire is the long run. The team stripped it, cut it to a clean length, crimped a ring terminal and sleeved it so the finished run looks like factory wiring. It runs along the side of the truck with an inline fuse, then the ring terminal goes straight onto the 12V battery.

The video's rundown points out that on this Land Cruiser the battery is at the back of the vehicle, in the cargo area, not under the hood, and there is a clear channel that leads to it once the seat is folded down. Check where yours is before you plan the run.

The ground got its own ring terminal and went to a clean spot on the chassis near the sub. Once the covers go back on, you cannot see it. A short ground to bare metal is what keeps a powered sub from humming or cutting out.

Prefer not to run a wire to the battery at all? Read our guide to powering a subwoofer without a battery run and see whether it fits your setup.

Step 4: Hide the Sub and Mount the Bass Knob

The Kicker HS10 goes under the seat, so the cargo area stays fully usable. The bass control knob cable runs from the passenger side, underneath the center console, and out to the driver's side. A strip of double-sided 3M tape holds the knob in a spot the driver can reach. That knob lets you turn the sub up or down on its own, separate from the stereo volume.

Last step: tuck every wire, zip tie it clear of moving parts, and reverse everything you took apart on the head unit side.

How It Sounds at the Same Volume

The video opens and closes with a sound check at volume 15, first on the factory audio and then with the amp and sub. Put on headphones and listen to the low end. The sub fills in the bass the factory door speakers cannot reproduce, and nothing in the cabin gives away that anything was added.

Want to see the same idea in a smaller Toyota? Our 2023 Prius under-seat subwoofer wiring guide goes deeper on the power, ground and remote leads, and where to put a subwoofer without losing trunk space compares mounting spots.

Land Cruiser Subwoofer FAQ

Do I have to cut factory wires to add a sub to my Land Cruiser?

No. The ENA-3T3 plugs into the factory connectors and supplies the RCA signal and remote lead for the sub. Only the sub's own power and ground are new wires, and the whole setup can be unplugged to return to stock.

Does the ENA-3T3 fit a Land Cruiser with JBL?

The ENA-3T3 listing covers the 2024 to 2027 Toyota Land Cruiser with or without JBL. Check the fitment notes on the product page for your exact build. On a JBL truck, the ENA-3T3 sub level does not follow the factory volume, so you set it with the bass knob, like in this build. If you want the sub to follow the factory volume, get the Encore Boost ($349, pre-order, ships the first week of December 2026), or the ENA-2T3 plus the ACS-T02 ($458) if you need it now.

Where does the subwoofer go?

In this build the Kicker HS10 Hideaway powered sub sits under a seat, so you keep all of your cargo space.

What gain settings did you use?

Front at about 1 o'clock and rear at the 12 o'clock factory default. Adjust from there by ear.

How do I control the sub level?

The remote bass knob mounts near the driver with double-sided tape and adjusts the sub independently of the stereo volume.

Let Us Wire Your Land Cruiser

Routing power through a Land Cruiser is tight work. If you would rather skip it, bring the truck to our La Mirada, California shop and our techs can install the amp and sub, often in one day. Contact the Beat-Sonic team to set it up, or browse our sound deadening kits to keep that new bass from rattling the doors.