DRIVE UNITS BY MANUFACTURER:
MW19TX-4
The Satori MW19TX-4 by SB Acoustics is a high performance 7.5 inch 4 ohm midwoofer featuring a state of the art TeXtreme® biaxially oriented thin ply carbon fibre cone; this new ultra lightweight but highly rigid material offers new levels of transparency and detail. Very high efficiency.
Also available in 8 ohms: MW19TX-8.
Resonant frequency (fs) | 32 Hz | Nominal impedance (Zn) | 4 Ω |
Mechanical Q factor (Qms) | 5.43 |
DC resistance (Re) | 3.4 Ω |
Electrical Q factor (Qes) | 0.28 |
Max power handling | 70 W |
Total Q factor (Qts) | 0.27 |
Sensitivity (2.83V/1m) |
93dB |
Equivalent volume (Vas) | 53.2L | Chassis diameter |
187mm |
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)!