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Focal Polyglass 21 V2

8" 4-ohm subwoofer

Item #: 09121V2

This item is no longer available.

Original Price: $349.99

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Focal Polyglass 21 V2

Overview

Our take on the Focal Polyglass 21 V2

Focal's Polyglass subwoofer uses precision craftmanship and advanced materials to create a big bass impression. Focal creates the Polyglass cone by depositing a layer of hollow glass microbeads over a layer of cellulose. This unique material combines the warm sound of cellulose with the incredible strength of glass, for a cone that responds rapidly with low resonance. The exceptionally resilient zinc alloy basket teams up with the Polyglass cone, butyl rubber surround, and an advanced motor structure to deliver uncolored bass that'll please the discerning ear.

Focal's Polyglass subwoofer uses precision craftmanship and advanced materials to create a big bass impression. Focal creates the Polyglass cone by depositing a layer of hollow glass microbeads over a layer of cellulose. This unique material combines the warm sound of cellulose with the incredible strength of glass, for a cone that responds rapidly with low resonance. The exceptionally resilient zinc alloy basket teams up with the Polyglass cone, butyl rubber surround, and an advanced motor structure to deliver uncolored bass that'll please the discerning ear.

The 21 V2 8" subwoofer handles up to 200 watts RMS, and Focal optimizes this sub to work in sealed enclosures for the best sonic results. Complete your system with a compatible amp and wiring to experience Focal's bass finesse.


Priced per speaker

What's in the Box:

  • 8" SVC 4-ohm woofer
  • 6 Hex-head mounting bolts
  • 6 Nuts
  • Self-adhesive foam gasket
  • User Manual (Eng/Fre)
  • Serial number card
  • FOCAL logo sticker
  • "Remove Before Using" note (attached to speaker terminals of woofer)

Product Highlights:

  • 8" 4-ohm subwoofer
  • Polyglass cone with butyl rubber surround
  • zamak (zinc alloy) basket
  • power range: 50-200 watts RMS
  • peak power handling: 500 watts
  • frequency response: 40-500 Hz
  • sensitivity: 81.21 dB
  • top-mount depth: 4-1/2"
  • sealed box volume: 0.35-0.71 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee
Reviews

Focal Polyglass 21 V2 Reviews


Details

Hands-on research

What's in the box?

Download the Focal Polyglass 21 V2 manual

  • 8" SVC 4-ohm woofer
  • 6 Hex-head mounting bolts
  • 6 Nuts
  • Self-adhesive foam gasket
  • User Manual (Eng/Fre)
  • Serial number card
  • FOCAL logo sticker
  • "Remove Before Using" note (attached to speaker terminals of woofer)

Product Research

Features
Enclosure Compatibility

Features

Polyglass Cone: The FOCAL Polyglass 21V2 features an 8" polyglass cone woofer for a wide, dynamic frequency response of 40-500Hz that offers neutral, coloration free 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.

NBR Surround: The FOCAL Polyglass 21V2 features a NBR (Nitrile Butyl Rubber) surround for long excursion, deep bass, and added durability to promote long life.

2" Voice-Coil: The Polyglass 21V2 woofer features a two layer, 2" diameter, single 4-ohm, voice-coil with a large copper wire on an aluminum support for higher power handling capabilities up to 200 watt (RMS) and 400 watt (Peak).

Louvered Cooling System: The Polyglass 21V2's Louvered Cooling System is self-regulated ventilation system which increases air cooling, prevents heat build-up, and provides optimized reliability with performance consistency.

120mm Magnet: The Polyglass 21V2 woofer features a 120mm (4.725") ferrite magnet for higher sensitivity up to 85dB (2.83V/1m).

Die Cast Chassis: The FOCAL Polyglass 21V2 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 8" woofer is equipped with a pair of nickel-plated spring-post speaker terminals for easy connection up to 10AWG wire.

Foam Gasket: The Polyglass 21V2 comes supplied with a self-adhesive foam gasket mounting-ring for better chassis damping and to prevent air leakage.

Enclosure Compatibility

Recommended Sealed Box Volume: The FOCAL Polyglass 21V2 is designed to be installed in a sealed box with a volume between 0.42 cu/ft to 0.71 cu/ft. FOCAL recommends a sealed enclosure made out of 3/4" MDF with an internal volume of 0.53 cu/ft.

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

Internal Volume 0.42cu/ft. 0.53 cu/ft. 0.71 cu/ft.
Dimensions Width: 13.375"
Height: 10.25"
Depth1: 10.25"
Depth2: 7.0625"
Width: 14.1875"
Height: 11.0"
Depth1: 11.0"
Depth2: 7.0625"
Width: 16.125"
Height: 11.75"
Depth1: 16.125"
Depth2: 7.0625"
Bass Type Fast and tight bass Punch and dynamic bass Deep and articulate bass

Our Product Research Team

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