6.5 Inch Subwoofer

Choosing the Right 6.5 Inch Subwoofer

A small sub works best when you know exactly what you want from it. Here is what to expect and how to set one up properly.

What a 6.5 Inch Subwoofer Does Well

A 6.5 has roughly two-thirds the cone area of an 8 and about 40% of a 10. It plays upper bass and the punch of kick drums with authority, and it responds fast. What it can't do is reproduce the deepest notes at high volume the way a larger sub can. A 6.5 is a smart choice if:

• You drive a compact car, a coupe, or anything where trunk space is precious.

• You want fuller, tighter bass from a factory or sound-quality system, not a trunk-rattling build.

• You need a sub that fits a door, kick panel, or console location.

6.5 Inch Subwoofer vs a 6.5 Inch Speaker

This is where most confusion starts. A regular 6.5 inch car speaker is designed to play vocals, guitars, and upper bass. A 6.5 inch subwoofer speaker is designed for low frequencies only, with a stiffer cone, a heavier motor, and more cone travel. It needs its own amplifier channel and a low-pass crossover so it only receives bass.

Upgrading the speakers that play everything else? Browse our car speakers.

Enclosure and Mounting Options

A 6.5 inch subwoofer enclosure is small by subwoofer standards, which is the main appeal. A sealed box sized to the driver gives the tightest, most reliable results, and our subwoofer box calculator works out the exact volume.

Door and kick-panel mounting can work, but the space has to be sealed and treated with sound deadening, or the front and rear waves cancel and the bass disappears. If you are hunting for a 6.5 inch shallow subwoofer for a door, check the VFL 6.5's mounting depth against your window track before you buy.

Powering a 6.5 Inch Car Subwoofer

A 6.5 inch car subwoofer rated at 300 watts RMS doesn't need a big amplifier. A compact monoblock, or two bridged channels on a multichannel amp, will drive it properly. The dual 4 ohm coils wire to 2 ohm in parallel or 8 ohm in series, so you can match the load your amp prefers. Our subwoofer wiring diagrams show both layouts, and the sub-amp matching calculator finds compatible amps.

When to Step Up to an 8

If you want more output after living with a 6.5, you have two routes. A second 6.5 gives the pair about a third more cone area than a single 8, which works well when you have two small mounting spots rather than one bigger one. Or step up to an 8, which adds about 50% more cone area over a single 6.5 in a box that is still compact. See our 8 inch subwoofers for options from 300 to 1,200 watts RMS.

Why American Bass

The VFL 6.5 comes from a company that has built car audio subwoofers in Twinsburg, Ohio, for over 35 years. We publish real RMS power and impedance figures, so you know exactly what you are installing. If you are searching for the best 6.5 inch subwoofer for a tight build, start with the specs, then let our installer finder connect you with a shop that can fit it cleanly.