DRIVE UNITS BY MANUFACTURER:
C90-6-724
The C90-6-724 is a 5 inch chassis (124mm) Midrange / Bass drive unit with an ultra hard ceramic (Sapphire) diaphragm in the form of a large inverted dome.
The voice coil former is the same diameter as the dome and is bonded to its outer periphery - the entire rear radiating surface is completely unobstructed and free from the effects of reflection or unwanted stored energy.
This unit features a low loss rubber surround and a strong but delicate fabric spider giving an impressive maximum linear excursion of 8mm.
A very discrete and secure clamping technique provides easy mounting and adaptation to individual baffles.
We recommend an application from 60 Hz – 6000 Hz.
Full datasheets can be downloaded from below.
Resonant frequency (fs) | 65Hz | DC resistance (Re) | 5.9Ω |
Mechanical Q factor (Qms) | 0.9 | Power handling | 100W |
Electrical Q factor (Qes) | 5.47 | Sensitivity (2.83V/1m) | 89dB |
Total Q factor (Qts) | 0.52 | Chassis diameter/square | 124mm |
Equivalent volume (Vas) | 5.1L | Cutout diameter/square | 124.5mm |
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Built to order - contact us for a lead time.
Friendly technical support
40+ years in the trade
UK family run business
Excellent customer service
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I always knew that Linn should never have stopped using Hiquphon tweeters. What I don't know is why it's taken me thirty years to fit a pair in my old Kabers. It's often hard to describe sonic character ....but to pinch Linn's old line from back in the day ...they're Simply Better.(even straight out the box with soldering iron still warm)
As my Kabers are passive,I had been a little concerned that the the 8 ohm nominal impedence of the OW1 would mess with the crossover slope. I needn't have worried....if its shifted the crossover point its much for the better.
Warm thanks also to Will and Caroline for a service in keeping with the outstanding quality of the Hiquphon product.
Alan
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.