All systems go !
All systems go !
DRIVE UNITS BY MANUFACTURER:
C158-8-085
The Accuton C158-8-085 Bass / Midrange driver is a development of the C158-6-851 with a slightly different design criteria : a revised motor system comprising of a light weight 25mm voice coil and titanium former assembly give improvements to both midrange resolution and extension plus a mild increase in sensitivity.
Designed specifically for small monitors and slim floor standing designs, this esoteric unit has a soft rubber suspension, an ultra hard 120mm ceramic (Sapphire) cone and a large 10mm maximum excursion allowing it to produce impressive volume levels from small footprint enclosures.
The spider, pole and voice coil former are fully ventilated for minimal compression. This 8 ohm unit has a power rating of 100 watts - very respectable for a domestic driver of this size.
Full datasheets can be downloaded from the bottom of this page.
Vented:
Vb: 15L, Port diameter: 50mm, Length: 190mm, Fres: 41Hz, F-3dB: 45Hz, Q: 0.58
Vb: 22L, Port diameter: 50mm, Length: 130mm, Fres: 40Hz, F-3dB: 40Hz, Q: 0.50
Vb: 12L, Port diameter: 50mm, Length: 200mm, Fres: 45Hz, F-3dB: 49Hz, Q: 0.61
Infinite baffle:
Vb: 8.5L, -11dB @ 40Hz, F-3dB: 70Hz, Q: 0.71
Vb: 22L, -8.5dB @ 40Hz, F-3dB: 70Hz, Q: 0.50
Resonant frequency (fs) | 33Hz | DC resistance (Re) | 7.8Ω |
Mechanical Q factor (Qms) | 4.12 | Power handling | 100W |
Electrical Q factor (Qes) | 0.34 | Sensitivity (2.83V/1m) | 89dB |
Total Q factor (Qts) | 0.31 | Chassis diameter | 158mm |
Equivalent volume (Vas) | 35L | Cutout diameter | 137mm |
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I've needed something like this for years, fantastic product and a lovely company to deal with. Won't be my last purchase from them
It was a nice experience to send the old filters to the UK (from the Netherlands) and get them surprisingly fast back (taking the overseas shipment into account). At first I did it wrong since I also replaced the drivers that could also be connected in a 4/6 Ohm (double coil). But after correcting and calibrating my receiver the speakers sounded great.
Thanks!
Used in a DIY LS3/5a project, with Morel CAT 298 tweeters and custom crossovers using ClarityCap CSAs. Super pleased with these woofers! I think they synergize well with the “live” thin-wall LS3/5a cabinets. The sound is neither bloated, nor thin, just revealing, spacious, and with very lifelike tone. I’m so happy with the results of this project and had a great buying experience with Willy’s. Thank you!!
I used this in custom LS3/5a speaker enclosures along with Monacor SPH-135AD woofers and custom crossovers using ClarityCap CSAs. The tweeters have a very pure sound, revealing microdetails and having a naturally smooth, response. The sound is never peaky or rough. I’m very happy with my purchase and with the service from Willys. Would buy from again for a future project!
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.