DRIVE UNITS BY MANUFACTURER:
SB12PACR25-00
NEW PRODUCT - UK STOCK ITEM
The SB Acoustics SB12PACR25-00 is a 4 inch adjustable passive radiator featuring an anodised aluminium cone.
Designed to perfectly compliment the SB12PACR25-4 midwoofer.
Resonant frequency (fs) | 33Hz | Nominal impedance (Zn) | - |
Mechanical Q factor (Qms) | - | DC resistance (Re) | - |
Electrical Q factor (Qes) | - | Max power handling | - |
Total Q factor (Qts) | - | Sensitivity (2.83V/1m) |
- |
Equivalent volume (Vas) | 4.3L | Chassis diameter (round) |
122mm |
Friendly technical support
40+ years in the trade
UK family run business
Excellent customer service
Quick dispatch
Been looking for a supplier of replacement drivers for some years.
Willy's HiFi had just the parts at a good price and they arrived in a couple of days.
Excellent service. Even a personal thank you hand written on the invoice.
A quick delivery and the tweeters are perfect on my mission 753 freedom speakers. Easy to fit . Highly recommend.
I’m no expert when it comes to speakers, but after some research (and a strong recommendation from ChatGPT), I went with the SB Acoustics SB65WBAC25-4 as a reference full-range speaker in this size range.
Having now tested them, I can confidently say they’re probably the best speakers I’ve ever owned. The clarity is outstanding—every detail comes through with incredible precision. The bass is surprisingly full and punchy for a speaker this size, and they handle power impressively well. For anyone looking for a high-performance compact full-range driver, these are hard to beat.
Item as described and arrived quickly - and did the job. However, I suggested that anyone replacing speaker foam makes sure they have a very large pair of sharp dressmaking scissors as it was not easy cutting to size without producing a ragged edge (which I managed to hide short of a close inspection)!