DRIVE UNITS BY MANUFACTURER:
SPH-8M
UK STOCK ITEM
Excellent value replacement for a huge number of 8" woofers including: Mission, Castle, Acoustic Research, Mordaunt Short, Spendor, Wharfedale, B&W and many others.
Dampened low-resonance polypropylene cone.
Robust smooth cast alloy chassis with 6 mounting holes.
Drilled pole core and large high efficiency magnet.
Very Linear frequency response.
Suitable for both reflex & infinite baffle designs.
We also stock a 5 inch version of this driver (SPH-5M) and a 6 inch version (SPH-6M).
Resonant frequency (fs) | 35 Hz | Nominal impedance (Zn) | 8 Ω |
Mechanical Q factor (Qms) | 2.26 | DC resistance (Re) | 6.5 Ω |
Electrical Q factor (Qes) | 0.50 | Max power handling | 150W |
Total Q factor (Qts) | 0.41 | Sensitivity (2.83V/1m) | 89 dB |
Equivalent volume (Vas) | 44L | Chassis diameter | 222 mm |
SPH8M
I bought a pair of Acoustic Research AR28LS speakers back in 1985 for £129 ! After about 15 years the foam suspension had started to perish and completely failed in 2006 following a rather loud teenage party. I was never happy with the Eminence Beta-8A replacements bought from a local shop at the time, as the bass resonance was far too high. Finally decided to replace them with Monacor SPH-8M and the speakers now sound as good as new. Arrived quickly and no problems fitting. Many thanks.
Thanks for the review Pete. I remember selling the AR28LS when working for 'Hifi Markets' many moons ago - like the smaller AR18S but with some bass !
Will
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)!