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By Chad G. Peterson
Concept image for planning speaker locations.
A system plan answers two questions before you shop for equipment: How many speakers will your chosen pods hold, and how many powered channels will those speakers need? Start with the sound you want, count every speaker position, then draw the groups you want to control. The example below uses a 2000–2006 Chevrolet Silverado extended cab with manual windows; use the same steps for any vehicle.
Decide whether you want a focused front stage, balanced daily sound, or strong output. This tells you which locations matter most. Front door pods can build a stronger foundation, A-pillar pods can bring vocals and detail higher, and rear door pods can add output for passengers and the whole cabin.
Start at Select Your Vehicle, then check the exact cab, window controls, trim, and pod gallery. Each opening is a place you must account for in the plan. The Silverado example uses these three pod pairs:
| Pod pair | Openings per side | Speakers to plan |
|---|---|---|
| Dual 6.5-inch front door pods | 2 | 4 total |
| Dual 6.5-inch rear door pods | 2 | 4 total |
| Single 3.5-inch A-pillar pods | 1 | 2 total |
The subwoofer sits in its own enclosure, so add it to your system count even though it does not use one of these pods. Different pod choices change the number of openings; count what you actually plan to install.
For this example, the pod plan calls for eight 6.5-inch door speakers and two 3.5-inch pillar speakers. Add one subwoofer for bass: 11 speakers total.
The door speaker guide and A-pillar speaker guide help you choose the exact type and size after the plan is set.
A channel is one separately powered speaker output. Count the left and right sides separately. In this example, the two speakers in each door can share one channel if the chosen speakers and amplifier support the resulting load. Each pillar speaker gets its own channel, and the subwoofer gets one bass channel.
| Speaker group | Speakers | Planned channels |
|---|---|---|
| Front left and front right doors | 4 | 2 |
| Rear left and rear right doors | 4 | 2 |
| Left and right A-pillars | 2 | 2 |
| Subwoofer | 1 | 1 |
| Total | 11 | 7 |
That channel count could be supplied by a four-channel door amp, two-channel pillar amp, and mono sub amp. A different combination of amplifiers can provide the same seven outputs. The amplifier selection guide covers the actual power and impedance match.
Write the source at the top of your sketch, then each amplifier and its channels, then the pod or subwoofer each channel feeds. Label front left, front right, rear left, rear right, pillar left, pillar right, and sub. This gives you a shopping checklist and makes a missing channel easy to spot. The example layout below turns the 11-speaker count into seven separate outputs.
With the locations, speaker count, and channel count in hand, choose the speakers in the door and A-pillar guides, then select an amplifier.