DRIVE UNITS BY MANUFACTURER:
SP-90
The Monacor SP-90 is an 8 inch bass drive unit featuring a pulp cone, a rigid pressed steel chassis, soft foam suspension and a forward ventilated dust cap. A good budget choice for general replacement duties; can be mounted on the front or rear of the baffle.
Resonant frequency (fs) | 45 Hz | Nominal impedance (Zn) | 8 Ω |
Mechanical Q factor (Qms) | 3.36 |
DC resistance (Re) | 6.5 Ω |
Electrical Q factor (Qes) | 0.68 | Max power handling | 70W |
Total Q factor (Qts) | 0.57 | Sensitivity (2.83V/1m) | 92 dB |
Equivalent volume (Vas) | 42L | Chassis diameter (pincushion style) |
205 mm |
SP-90
I purchased 6 off Manacor SP-90 Bass speakers to replace the speakers in my 30-year-old Wharfedale Valdus 500 tower speakers. The foam suspension had deteriorated into pieces. With a little bit of fettling the SP-90’s fitted and they sound even better than the original speakers. The PDF datasheet on the website was a great help in choosing these speakers. I would highly recommend Willy’s Hi-Fi as the service was first-rate.
Thanks for the review Roy !
Will & Caroline
Got two of these SP 90's to replace some 30 year old, faded and worn out, Technics bass speakers in my 3-way. What a difference, with the right amount of wadding in place, these two little monkeys pack a right punch!....
Thanks for the review Paul!
Will & Caroline
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)!