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
I tried this uprated capacitor through sheer curiosity and am pleasantly surprised with the results. So far, and not too many hours in, it’s giving a slightly smoother edge to the top end and has solved an issue I had regarding some hardness to the sound. I’m impressed enough that I’ll look to replace the mid range caps in the future.
I came across some info that after many years these old B&W P4's tweeters degrade. As I grew older, (with reduced hearing of course), I never noticed this gradually deterioration over the years. So I bought the replacement tweeters from Willy's which was picked up just a few days later in Norway. They were mounted in 30 minutes,.. and what a change! My HiFi sounds as a new set. Thanks!
New Foam covers supplies by WHF have completely changed the appearance- they look brand new! Great quality foam, very reasonably priced and quick delivery. Delighted with they now look and sound - will hang on to them forever now.
Excellent upgrade, works perfectly with the speakers it's just soldier and play, they takeaway the over intensity of the original tweeters.
I've had my Mission 734s for about 30 years and for the last five or so the bass units have been falling to pieces. I was about to take the speakers to the tip, but didn't have the heart knowing how capable these used to be. I did a little internet research and these Monacor replacements appeared to do the job. Next day delivery from Willys was impressive, as was the killer sound once the replacements were fitted (which was a simple job). I'd forgotten how these speakers make the windows rattle. Very happy customer!
