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Tang Band W4-2089 4.5" RBM Mini Flat Panel Subwoofer 4 Ohm

Tang BandPart # 264-952
Model: W4-2089
The 4.5" W4-2089 mini subwoofer from Tang Band is built using propietary RBM surround technology for ultra-linear output down to 35 Hz.

Key Features

  • Small design for unique applications such as speaker bars
  • Patented dual cone, dual surround subwoofer
  • Ultra-linear operation for low non-linear distortion
  • Huge 1-1/2" voice coil with 8 mm of Xmax and extensive cooling
  • This item available through special order only. Minimum order quantity is 50 pieces
Your Price: $119.98
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MSRP: $155.99
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Overview

Tang Band W4-2089 4.5" RBM Mini Flat Panel Subwoofer 4 Ohm

This item available through special order only. Minimum order quantity is 50 pieces

Tang Band designed their revolutionary RBM (Real Balanced Mode) flat subwoofers for ultra-linear operation, while remaining as thin as possible. The secret to their low distortion performance is in the patented symmetrical suspension system.

While most subwoofers rely upon a spider/surround combination to keep the cone travel linear, Tang Band has developed a new injection molding process that incorporates front and rear cones, as well as dual opposed surrounds.

Similar to an isobaric subwoofer alignment, the two cones work together to modulate a single column of air, reducing non-linear harmonic distortion. The added mass of the rear cone/surround assembly also reduces free air resonance.

Tang Band's W4-2089 4.5" RBM mini subwoofer features extensive venting on the rear cone, voice coil former, and back plate to keep the large, overhung voice coil cool. A bumped back plate allows for momentary moments of over-excursion without damage. Additionally, it offers low distortion frequency response that reaches down to 35 Hz.

Product Details

BrandTang Band
ModelW4-2089
Part Number264-952
UPC848864015064
Unit of MeasureEach
Weight5.75

Product Specifications

Nominal Diameter4-1/2"
Bolt Circle Diameter6.625
Power Handling (RMS)40 Watts
Power Handling (MAX)80 Watts
Impedance4Ω
Frequency Response35 to 800Hz
Sensitivity80dB 2.83V/1m
Voice Coil Diameter1.5"

Thiele-Small Parameters

Resonant Frequency (Fs)35Hz
DC Resistance (Re)3.6Ω
Voice Coil Inductance (Le)0.19mH
Mechanical Q (Qms)4.64
Electromagnetic Q (Qes)0.36
Total Q (Qts)0.33
Compliance Equivalent Volume (Vas)0.14ft³
BL Product (BL)9.24T·m
Diaphragm Mass Inc. Airload (Mms)34.92g
Maximum Linear Excursion (Xmax)8mm
Surface Area of Cone (Sd)75cm²

Materials of Construction

Cone MaterialPoly Composite
Surround MaterialRubber
Basket / Frame MaterialPolymer
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter5.08" across the flats, 6.88"
Baffle Cutout Diameter4.8"
Depth3.53"
# Mounting Holes4

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.08ft³
Sealed F389.1Hz
Vented Volume0.1ft³
Vented F340.6Hz

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