Landscape Speakers: Satellite and Buried Subwoofer Systems

Wall-mounted patio speakers blast sound from one direction, so the people closest to the house get too much and the far end of the yard gets too little. Landscape speakers solve that by tucking small satellite speakers into planting beds all around the space, with a subwoofer buried in the ground to supply bass. The result is even, moderate sound everywhere guests gather, with almost nothing visible.

A typical system uses six to twelve satellites on stakes spaced 10 to 20 feet apart around the perimeter of the listening area, one or two in-ground subwoofers, and one amplifier indoors. The wiring is either standard 8-ohm speaker wire for smaller yards or a 70-volt distributed system for large properties. Every run is direct-burial cable in a shallow trench, which means calling 811 before you dig.

How Landscape Speakers Work

Outdoor landscape speakers are compact satellites, usually with 4 to 6 inch drivers, that handle mid and high frequencies. Small drivers cannot produce deep bass, so the system adds a subwoofer to cover roughly everything below 100 to 150 Hz. Because bass is non-directional, a single well-placed in ground subwoofer can support many satellites.

The design goal is distributed sound. Instead of two speakers turned up loud, many speakers play quietly, each covering a small zone. That keeps volume comfortable near any one speaker, reduces sound spilling into neighbors’ yards, and makes conversation easy while music plays.

Planning Satellite Placement

Sketch the yard and mark the areas people actually use: the patio, the fire pit, the pool deck, the lawn games area. Then place satellites around the edges, aimed inward.

• Spacing: 10 to 20 feet apart. Closer spacing means lower volume per speaker and more even coverage.
• Aim: Point speakers toward the center of the space and away from property lines and neighbors’ windows.
• Height: Most stakes put the speaker 1 to 2 feet above the soil. Keep them above mulch level so the grille stays clear of water.
• Concealment: Tuck them into shrubs and ornamental grasses, but leave a clear path in front of the driver so foliage does not muffle the sound.
• Clearance: Keep them out of mower paths and 2 to 3 feet from sprinkler heads, which can soak the grille and erode soil around the stake.

Plan for stereo by alternating left and right channels around the loop, or run the system in mono so every guest hears the full mix wherever they stand. Mono is common for large yards.

Placing and Burying the Subwoofer

An in-ground subwoofer sits in the soil with only a small port or grille showing above grade. Bury the enclosure according to the maker’s instructions, typically with the body below grade and the port cap 2 to 4 inches above soil so rain and irrigation runoff cannot pour into it. Choose a spot with good drainage; a low area that puddles after storms will shorten the life of the driver.

Put the subwoofer near the main seating area or along a wall or fence that reinforces bass. In a long yard, two subwoofers at opposite ends spread bass more evenly than one turned up loud. Some homeowners choose an outdoor powered subwoofer instead, which has its own amplifier; that model needs a GFCI-protected outdoor outlet with an in-use cover nearby, and a new outlet there is a job for a licensed electrician.

Wiring: 8-Ohm vs 70-Volt Systems

8-ohm (standard) wiring

Smaller systems with four to eight satellites often use ordinary speaker wiring from a stereo amplifier. Each pair of speakers needs a matching impedance load, so careful planning with series-parallel wiring or an impedance-matching volume control keeps the amplifier happy. Long runs need heavier wire: 14 gauge up to about 80 feet, 12 gauge beyond that.

70-volt distributed wiring

Large yards with many speakers use a 70-volt amplifier and speakers with built-in transformers. You simply run one cable loop and tap each speaker at a chosen wattage setting. This makes adding speakers easy and allows long runs with lighter wire. Add up the tap wattages and keep the total below about 80 percent of the amplifier rating for headroom.

Both types of speaker wire carry low-voltage audio signal, not line voltage. Still, use cable labeled direct-burial for anything underground; standard indoor speaker wire will crack and corrode in soil.

Tools and Materials

• Satellite landscape speakers with stakes, plus an in-ground or outdoor subwoofer
• Direct-burial speaker cable, 12 to 16 gauge depending on length and system type
• Gel-filled or waterproof wire connectors rated for burial
• Flat spade or trenching shovel, or a rented trencher for long runs
• PVC conduit for runs under walkways, driveways or patios
• Amplifier sized to the system, installed indoors or in a ventilated weather-protected enclosure
• Wall plate or weatherproof pass-through for where cable enters the house

Step-by-Step Installation

1. Call 811. Contact the national call-before-you-dig line at least a few business days before trenching. Utilities will mark buried gas, electric, water and communication lines for free. Hand-dig near any marks.
2. Lay out speakers and cable paths. Set speakers on the ground in their planned spots and play music through a temporary connection to check coverage before digging.
3. Trench. Cut a slit trench about 4 to 6 inches deep through lawn or beds for direct-burial cable (deeper or in conduit where you will plant or aerate). Run conduit under hardscape.
4. Lay cable and connect. Leave a small service loop at each speaker. Use waterproof connectors on every splice and keep connections above grade where possible.
5. Bury the subwoofer. Dig the hole, add a few inches of gravel at the bottom for drainage, set the enclosure level, and backfill.
6. Enter the house carefully. Drill through the rim joist with a slight downward slope toward the outside, check for pipes and wiring first, and seal the opening.
7. Connect the amplifier and test. Start at low volume, check each zone, then set a comfortable level and walk to the property line to confirm sound is not carrying excessively.

Electrical and Safety Notes

The amplifier and any powered subwoofer run on 120-volt line voltage. Outdoor outlets must be GFCI protected with in-use covers, and you should plug equipment directly into them rather than running indoor extension cords outside. If you need to work on an existing outdoor outlet, turn off the breaker and confirm power is off with a non-contact voltage tester. Do not attempt any testing on a live circuit. New outdoor outlets, buried power lines or new circuits are for a licensed electrician and typically need a permit.

Keep volume reasonable, especially after dark. Distributed systems make this easy because no single speaker needs to be loud.

Troubleshooting

One speaker is silent

Check its connector first; moisture in a non-waterproof splice is the most common culprit. Then look for nicked cable from edging tools or rodents.

Amplifier shuts off

On 8-ohm systems the impedance may be too low. On 70-volt systems the total tap wattage may exceed the amplifier rating. Recalculate and reduce load.

Bass sounds boomy near the sub and thin elsewhere

Lower the subwoofer level and add a second sub on the far side of the yard.

Cost Ranges

Satellite landscape speakers typically run about $100 to $400 each, and in-ground subwoofers often range from roughly $300 to $1,500. A complete eight-satellite system with one sub and an amplifier commonly totals $2,000 to $6,000 in equipment. Professional installation adds labor for trenching and wiring, often several hundred to a few thousand dollars depending on yard size and hardscape crossings.

When to Call a Licensed Professional

Hire a licensed electrician for any new outdoor outlet, a powered subwoofer circuit or underground power wiring. A landscape audio installer is worth the cost for large properties, 70-volt designs, or yards with extensive hardscape where boring under patios is needed. A pro can also tune landscape speakers so coverage stays even and sound stays inside your property line.