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Focal Polyglass 21 V2

8" Single 4 Ohm Polyglass Series Car Subwoofer

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8" Polyglass Subwoofer • Single 4 Ohm • 400 Watts • 200 Watts • Polyglass Cone • Butyl Surround • Aluminum Dust-Cap • Zamak Basket

Learn more about the 21v2

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This item has been discontinued

Product Highlights


8" Polyglass Subwoofer • Single 4 Ohm • 400 Watts • 200 Watts • Polyglass Cone • Butyl Surround • Aluminum Dust-Cap • Zamak Basket

Description


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Focal Polyglass Bliss

Since its very beginning, Polyglass has symbolized the very heart of the entire Focal Car line-up. The main characteristics of this line combines advanced technologies, total manufacturing control and unique know-how. This process has been continuously developed for more than twenty-five years, which still continues today, to reach a sound quality that is universally recognized as excellent while still remaining affordable. To arrive at this subtle balance, extreme care is taken over multiple production stages, which is why all of the key elements found in the Polyglass line are entirely manufactured by Focal in-house. The Polyglass cone, fully exploits the remarkable properties of glass, an even covering of micro glass spheres over the entire cellulose pulp paper cone greatly increases its rigidity without adding significant weight. The overall finesse of the Polyglass range comes from a combination of the tweeter and woofer, creating a neutral sound with excellent detail at recreating the emotion of music.

Product Features:

  • 8" Single 4 Ohm Polyglass Series Subwoofer
  • Power Handling:
    • Peak: 400 watts
    • RMS: 200 watts
  • Impedance: 4 ohm
  • Polyglass cellulose pulp paper cone
  • Butyl surround
  • Aluminum dust-cap
  • 4-3/4" Ferrite motor unit
  • NRB suspension for long excursion
  • 2" voice coil former
  • Louvered system for increased cooling
  • Zamak basket
  • Large nickel-plated spring terminals able to accept high power grade cable (up to 10 gauge)
  • Sensitivity: 85 dB
  • Frequency Response: 40-500 Hz
  • Mounting Depth: 4-1/2"
  • 1-year SonicElectronix.com warranty

Subwoofer Wiring Guide


Wiring Guide to Wire 1 Focal Polyglass 21 V2 Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Focal Polyglass 21 V2 Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Focal Polyglass 21 V2 Subwoofers

4 Channel Amp

Wiring Guide to Wire 4 Focal Polyglass 21 V2 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Specifications & Details


Subwoofer Specifications
Series
Polyglass Series
Subwoofer Size
8"
Peak Power Handling
400 watts
RMS Power Handling
200 watts
Voice Coil(s)
Single
Impedance (Per Voice Coil)
4 ohms
Voice Coil Diameter
2"
Frequency Response
40 - 500 Hz
Sensitivity
85 dB
Xmax (millimeters)
9 mm
Subwoofer Design
Round / Circle
Main Cone Color
Black
Dark Gray
Woofer Composition
Polyglass
Woofer Surround
Butyl Rubber
Magnet Structure
Single Stacked
Subwoofer Grille
No
Re-Cone Kit Available
No
Recommended Enclosure Specifications
Recommended Enclosure Type
Sealed
Minimum Sealed Box Volume
0.35 cubic feet
Optimum Sealed Box Volume
.53 cubic feet
Maximum Sealed Box Volume
0.71 cubic feet
Top-Mount Depth (Mounting Depth)
4-1/2"
Cutout Diameter
7-7/8"
Shallow Mount Installation
No
Electromechanical Parameters
Free-Air Resonance (Fs)
36.5 Hz
Equivalent Compliance (Vas)
15.27 liters
Total Speaker Q Value (Qts)
0.68
Electrical Q Value (Qes)
0.86
Electrical Resistance of Voice Coil (Re)
3.5 ohms
Mechanical Q Value (Qms)
3.28
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Item Details


Manufacturer:

Model Number:

21 V2

Weight:

8.00lbs

Internal SKU:

21v2

Internal Product ID:

21527

Product and How-to Videos


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