eBay

Custom-Built High-Performance 8" Subwoofer Driver

These subwoofers were designed and commissioned for a premium spatial audio project and represent the best of many samples from different brands tested. Built by a specialist factory and measured by an electroacoustic engineer, these drivers deliver performance to rival leading European brands—at a fraction of the cost.

🧪 Measured Parameters

Fs: 29.1 Hz – low for 8", ideal for deep bass
Qts: 0.23 – ideal for vented box alignments
BL: 15.7 TM – powerful motor
SPL: 86.2 dB (1W/1m)
Vas: 26.9 L
Sd: 24.05 cm²
Re: 3.6 Ω
Cms: 327 um/N
Mms: 91.3 g
Voice Coil Height: 31.8 mm
Dimensions:
Overall Diameter: 210mm
Cutout size: 185mm
Overall Depth: 123mm
Hole Spacing: 197.5mm, Both 4hole and 8 hole mounting is OK.
Min Mounting Depth: 111mm
XMax: 7mm (@ 24V) - maximum excursion

📈 Performance

Frequency response and impedance plots included in images. Suitable for enclosures of ~20–30L with port tuning around 32 Hz.

🛠️ Build Quality

Massive 5.5+ kg magnet structure
Precision-cast alloy basket
Oversized motor and vented pole piece
Stiff aluminium anodised cone with high-roll surround
Voice coil height: 31.8 mm

🎯 Applications

Hi-Fi and home cinema subs
DIY loudspeaker builds
Studio monitor low-end

📨 Shipping

Royal Mail Tracked 48 (singles) - FREE SHIPPING TO UK ONLY
Courier for multi-unit bundles
Packaged packaged in box (pictured) with internal support.

Any questions? Happy to provide enclosure guidance or extra details. Selling purely to recoup some project costs.