SHIPPING TO USA TEMPORARILY SUSPENDED
SHIPPING TO USA TEMPORARILY SUSPENDED
DRIVE UNITS BY MANUFACTURER:
18W / 4531G00
The Revelator 18W series of drivers continue the enviable trend set by the smaller 15W range. There's a few different versions - they are all excellent.
This drive unit is available in 4 and 8 Ohm impedance.
Popular among high end & esoteric designers - and with very good reason.
Featuring unique sliced / damped cone technology & huge high efficiency ferrite magnets, these no compromise drive units offer superlative sound quality with outstanding midrange resolution and extension.
This woofer is 4 Ohms ; the 8 Ohm version is here : 18W/8531G00
Resonant frequency (fs) | 33 Hz | Nominal impedance (Zn) | 4 Ω |
Mechanical Q factor (Qms) | 5.20 | DC resistance (Re) | 3.4 Ω |
Electrical Q factor (Qes) | 0.38 | RMS power handling | 70 W |
Total Q factor (Qts) | 0.35 | Sensitivity (2.83V/1m) | 90 dB |
Equivalent volume (Vas) | 41.9L | Chassis diameter | 182.2 mm |
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)!