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Focal Polyglass 33 V1

13" 4-ohm subwoofer

1 Review

Item # 09133V1

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Our take on the Focal Polyglass 33 V1

Focal's Polyglass subs pump out righteous low end that brings out the power in your music. Focal crafts these subs with tremendous care to ensure flawless output and long life.

Focal's Polyglass subs pump out righteous low end that brings out the power in your music. Focal crafts these subs with tremendous care to ensure flawless output and long life.

The 33 V1 13" subwoofer can take up to 400 watts RMS, and it's designed for use in a ported enclosure. Its advanced Polyglass cone bonds a layer of hollow glass microbeads over a layer of cellulose to create an incredibly strong, responsive speaker. The large butyl rubber surround keeps the cone moving smoothly, while the engraved aluminum dust cap provides protection with a classic look.

Focal anchors this sub with a rigid, non-magnetic zinc alloy basket that won't color your bass. Advanced cooling around the voice coil keeps this sub running cool when your music heats up. Focal's pursuit of excellence makes this Polyglass subwoofer a great pick for low-frequency reinforcement in your vehicle.

Priced per speaker

What's in the Box:

  • 13" SVC 4-ohm woofer (rubber magnet boot installed)
  • 8 Hex-head mounting screws
  • Self-adhesive foam gasket
  • User Manual (Eng/Fre)
  • Serial number card
  • FOCAL logo sticker
  • "Remove Before Using" notes (attached to speaker terminals of woofer)

Product Highlights:

  • 13" 4-ohm subwoofer
  • Polyglass cone with butyl rubber surround
  • zamak (zinc alloy) basket
  • power range: 100-400 watts RMS
  • peak power handling: 800 watts
  • frequency response: 30-500 Hz
  • sensitivity: 88 dB
  • top-mount depth: 6-3/16"
  • ported box volume: 1.06-1.77 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee

Focal Polyglass 33 V1 Reviews

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Hands-on research

Product Research

Enclosure Compatibility


Polyglass Cone: The FOCAL Polyglass 33V1 features an 13" polyglass cone woofer for a wide, dynamic frequency response of 30-500Hz that offers great bass and mid-bass sound. The uniform deposit of hollow-glass microballs over the entire cellulose pulp cone greatly increases its rigidity without adding significant weight, so you get a woofer that is durable, yet efficient, and sounds great.

Aluminum Dust-Cap: The Polyglass 33V1 features an aluminum dust-cap with an engraved FOCAL logo for a more esthetic look.

NBR Surround: The FOCAL Polyglass 33V1 features a NBR (Nitrile Butyl Rubber) surround for long excursion, deep bass, and added durability to promote long life.

Aluminum Voice-Coil Former: The Polyglass 33V1 woofer features a 4 layer, 2.5" diameter, 4-ohm, aluminum voice-coil former for higher power handling capabilities up to 400 watt (RMS) and 800 watt (Peak).

Louvered Cooling System: The Polyglass 33V1's Louvered Cooling System is self-regulated ventilation system which increases air cooling, prevents heat build-up, and provides optimized reliability with performance consistency.

Ferrite Magnet: The Polyglass 33V1 woofer features a156mm (6.0"), 25mm (1") thick ferrite magnet for higher sensitivity up to 92dB (2.83V/1m).

Die Cast Chassis: The FOCAL Polyglass 33V1 features a die-cast Zamak chassis which is a rigid, non-magnetic, and non-resonant frame that provides a strong, reliable structure for the woofer.

Spring-Posts: The FOCAL 13" woofer is equipped with a pair of nickel-plated spring-post speaker terminals for easy connection up to 10AWG wire.

Foam Gasket: The Polyglass 33V1 comes supplied with a self-adhesive foam gasket mounting-ring for better chassis damping and to prevent air leakage.

Rubber Magnet Boot: The Polyglass 33V1  features a rubber magnet boot to protect the woofer's magnet from shocks and corrosion. The rubber boot is removable.

Enclosure Compatibility

Recommended Ported Box Volume: The FOCAL Polyglass 33V1 is designed to be installed in a ported box with a volume between 1.41 cu/ft to 1.77 cu/ft. FOCAL recommends a vented enclosure made out of 3/4" MDF with an internal volume of 1.41 cu/ft.

Vented Enclosure Specifications (using 3/4" MDF construction)

Internal Volume 1.06 c/ft. 1.41 cu/ft. 1.77 cu/ft.
Dimensions Width: 14.9375"
Height: 14.5625"
Depth1: 14.5625"
Depth2: 9.3125"
Width: 19.25"
Height: 14.5625"
Depth1: 14.5625"
Depth2: 9.3125"
Width: 17.3125"
Height: 17.3125"
Depth1: 17.6875"
Depth2: 10.25"
Port 2.75" diameter x 9.0625" long 2.75" diameter x 9.0625" long 2.75" diameter x 9.0625" long
Bass Type fast and tight bass Punch and dynamic bass Deep and articulate bass

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