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6-1/2" Poly Cone Midbass Woofer 4 Ohm

Factory BuyoutsPart # 299-609

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This buyout 6-1/2" woofer is the perfect replacement for worn, tired sealed bookshelf speakers. The extended frequency response allows it to mate well with tweeters without a low pass filter. Save nearly 60% off the original retail price through this Parts Express exclusive buyout.

Key Features

  • Smooth, natural response doesn't require a low-pass filter
  • Decent Xmax for good bass response
  • Designed for use in sealed cabinets
  • Save nearly 60% off the original retail price!
Your Price: $9.98
MSRP: $30.99
Save $21.01 (68%)
Bulk Pricing
Quantity:Qty: 1-24 $9.98/ea
Quantity:Qty: 25-79 $9.35/ea
Quantity:Qty: 80-199 $7.98/ea
Quantity:Qty: 200+ $7.95/ea
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Estimated back in stock 8/29/2025
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Overview

6-1/2" Poly Cone Midbass Woofer 4 Ohm

This durable 6-1/2" poly cone woofer with rubber surround is designed to work best in small, sealed bookshelf-style cabinets. The damped poly cone creates smooth sound from 45 Hz all the way up to 3,000 Hz and is easy to integrate with many different tweeters, and the 4 ohm impedance extracts more current from an amplifier for twice the output (3 dB increase), when compared to a similar 8 ohm speaker.

A 1" voice coil is combined with an aluminum former for a power handling rating of 30 watts RMS and 60 watts max, and the "Q" of the motor is such that solid bass performance can be achieved in cabinets as small as 0.25 cubic feet, with an f3 of 63 Hz (with a 1/4 pound of acoustic fill).

Save over 50% off the original price through this exclusive factory buyout. 

Product Details

BrandFactory Buyouts
Part Number299-609
UPC848864006864
Unit of MeasureEach
Weight1.8

Product Specifications

Nominal Diameter6-1/2"
Bolt Circle Diameter6.125
Power Handling (RMS)30 Watts
Power Handling (MAX)60 Watts
Impedance4Ω
Frequency Response50 to 6,000Hz
Sensitivity88.3dB 2.83V/1m
Voice Coil Diameter1"

Thiele-Small Parameters

Resonant Frequency (Fs)52Hz
DC Resistance (Re)3.37Ω
Voice Coil Inductance (Le)0.48mH
Mechanical Q (Qms)2.99
Electromagnetic Q (Qes)1.4
Total Q (Qts)0.95
Compliance Equivalent Volume (Vas)0.65ft³
Maximum Linear Excursion (Xmax)3.5mm

Materials of Construction

Cone MaterialPoly
Surround MaterialRubber
Voice Coil Wire MaterialCopper
Voice Coil FormerAluminum
Basket / Frame MaterialSteel
Magnet MaterialFerrite

Mounting Information

Overall Outside Diameter6.5"
Baffle Cutout Diameter5.625"
Depth2.875"
# Mounting Holes4

Parts Express Staff Recommended Enclosure Volume

Sealed Volume0.4ft³
Sealed F361.4Hz
Vented Volume0.63ft³
Vented F347.2Hz

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