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DRIVE UNITS BY MANUFACTURER:
OW1-92
Categories: 0.75 - 2" (19-50mm) Dome Tweeters Hiquphon Tweeters
IN UK STOCK NOW.
Close matched pairs ± 0.5dB.
Excellent upgrade for Linn D20-LP-1 and Scanspeak D2008/8512 series.
This tweeter works very well in these passive Linn models:
KAN, SARA, ISOBARIK , KELTIK, KATAN, NEXUS, NINKA, TUKAN, INDEX, KEILIDH, KABER, ESPEK, AV5120 & AV5140.
Upgrades the Scanspeak D2008/8512 as found in models such as Rega Ela, Proac Tablette EBT, Studio EBS, Spendor SP2 and many others.
If you have any questions about compatibility please contact us.
The OW1-92 is a 20mm (3/4") soft dome tweeter offering a superb flat frequency response with great analytic and revealing capabilities.
Beautifully neutral, relaxing and non-fatiguing sound.. this is a very musical dome tweeter. Displaying an extremely broad banded response, the OW1 has been used in a great number of high-end 2-way loudspeaker designs. The OW1 is also a perfect choice for 3-way (or more) custom built designs of the highest quality. Although primarily designed for top end domestic loudspeakers, the OW1 has gained the reputation of being a benchmark product for studio monitors and bespoke car audio.This beautiful, fastidiously produced unit displays a very neutral and low distortion response curve with superb frequency linearity - VERY flat from 2 – 20 kHz +/- 1 dB (+/- 0.5 dB typical) - an exceptional result.
Phase linearity is also excellent and the rolloff towards the upper design limit is very smooth. Multiple rear chambers yield a low and well damped resonant frequency of just 850 Hz. The frequency response climbs softly to 2 kHz then is linear to 20 kHz.Very broad-banded (1.0 kHz to 25 kHz nominal –3 dB or better).
Unique heavy duty 2.5mm solder bucket connectors - a soldering guide can be found here: Hiquphon connection guide
Supplied as matched pairs to within an incredible 0.5 dB (individual graphs included), each pair is thoroughly tested before being signed off by Oskar Wrønding, the founder of Hiquphon.
Full set of datasheets can be downloaded from the bottom of this page.
Sole Authorised UK distributor.
| Resonant frequency (fs) | 850 Hz | Nominal impedance (Zn) | 8 Ω |
| Effective diaphragm diameter | 20mm | DC resistance (Re) | 5.8 Ω |
| Ferrofluid ? Y/N | No | RMS power handling | 100 W |
| Recommended crossover min. | 2kHz/18dB | Faceplate diameter | 92 mm |
| Sensitivity (2.83V/1m) | 87 dB | Cutout hole diameter | 70 mm |
Phone helpline: 01702 523999 or contact us
Have installed these tweeters in Keltik speakers driven by Klimax DSM Katalyst ExaKtbox both with utopik power supplies and six Dynamik 500 solo's. Immediate improvement over linn alternatives.
Chose the OM-1 version as the room is acoustically " bright ". Currently using standard linn Keltik software for 15/3 tweeters. Tune dem positioning of speakers no space optimisation applied
Really appreciate the level of service received and the advice given by Willys hi fi.
Have another pair of these tweeters in Ketiks built up from bare cabinets but with old Kef b139 sp1044
constructors drive units units obtained from eBay ..Naim front end . Linn active tune box, Linn lk280"s
all transformer powered. - also sounds good
Thanks for the review Keith ! The Hiquphon tweeters really start to sing after approx. 100 hrs use.
Will & Caroline
What a business, such a personal service , superb communication , and speed of delivery.
Bought a matched pair of Hiquphon OW1-92 Tweeters for my ancient Linn Kan’s Mk11.
WOW back to life , if not better , the main difference I hear , is more life, output, depth from the tweeter without taking away what I love about the Kans.
Will order a second set very soon for my other pair.
Thanks Will , and Happy Birthday.
Anthony
Loved the extra touch , gaskets, solder and screws.
Thanks for the review Anthony !
Will & Caroline
I originally bought a pair of OW2 in error.
I did however find them very articulate and detailed but could be a bit shrill on occasions so I ordered the OW1 as a replacement. They are smoother but I now wonder if I miss the detail of the OW2s.
Only time will tell. As ever very fast efficient service from Willys
Thanks for the review Kevin !
Will & Caroline
Had one of the original 038/2 tweeters go on me, so decided to get some of these, as a number of people on chat forums say that they are a good replacement (even though the Linn dealer told me not to).
They are in my opinion, quite a significant upgrade from the 038/2. Brighter (which I like), but also more detail and a bigger soundstage. Easy to install (with the solder buckets), but could do with having a thicker gasket as the front plate is thinner (I guess I'll have to make some one rainy day).
I run my Ninkas Aktiv, but I suspect that you will get an even bigger difference if running passive. Highly recommend these. Probably the best value upgrade I've ever had.
Thanks for the review Bob !
Will & Caroline
I bought these to upgrade Keilidh tweeters, was hoping it wasn't a waste as they're, er, not cheap. I've waited a couple of weeks before posting this review, to properly listen. Well... I can't believe the difference, it's all so much more clearer, the previous harsh, tiring tone all gone. What a joy. And did I mention the clarity? Wow!
Thanks for the review Tim !
Will & Caroline
Friendly technical support
40+ years in the trade
UK family run business
Excellent customer service
Quick dispatch
In addition to my post from 17/11/2025, here is some information on the final status of the project: Saving the Mission 752 loudspeakers.
Once it was certain that it would be possible to revise the loudspeakers (thanks to Willy), the desire to also replace the low-midrange drivers and convert the crossover to a high-quality version quickly arose. I was fortunate enough to be able to purchase two Burmester 949 MKII midrange drivers from Audax to replace the existing low-midrange drivers (52LFHDA – still available and can be sold). They are practically identical in design, but significantly more refined and powerful. Revising the crossover proved somewhat more difficult because the values of the coils were not printed on them. However, they can be determined by measuring the originals. Mundorf resistors, coils and capacitors of the two highest quality grades were installed. These are not exactly cheap, but once the speaker is finished, the difference is clearly audible. The crossover was also modified slightly. A shunt was integrated into the high-frequency branch. Following a tip in a forum, the crossovers were also moved to the outside. They are currently still on the speaker without a housing. The metal housing provides perfect shielding. As the Willys tweeters are very efficient, they were ‘damped’ slightly. The final cost of the conversion was approximately £600. In return, the speakers now perform at a level that far exceeds their original condition. An exciting project that was only made possible by Willys – thanks to Caroline & Will ❣️
Id had these speakers for a couple of years. I got the S/H and already the tweeters weren't working when purchased. Played them for and while but parked them up hoping one day to organise tweeters. Well that day finally came and i am blown away. Easily better than my Jamo 507A's and TDL RTL 3's. I drive them with an adcom 5300 and nad as pre amp. I am in New Zealand. The turn around time was within 2 weeks. Saving up for the crossover upgrade.
This made a massive difference to my 30 year old Linn Keilidh speakers, giving them a new lease of life.
Willy's is an awesome serivce. I needed a 4" midrange replacement that is a drop in exact fit for the IMF TLS50. If you are ordering from the USA, the Monacor MSH-115, 4" is your best option. I live in Pennsylvania and it only took 5 days from the time I ordered to be delivered from the UK. Royal Mail provides tracking. I dropped in cab and was fired up shortly on the same day. Sounds great. Totally worth buying these instead of rebuilding old speakers.
Willys saved my Mission 752 speakers. The tweeters were defective. The original tweeters are no longer available, and it would have been a shame to throw away these really good speakers. I came across Willys by chance in a chat room. Even there, the company and especially the tweeters were highly praised. I contacted Willys and received a very friendly response. Ordering the speakers went smoothly. However, shipping to and from the UK is a real adventure due to ****. It is expensive, cumbersome and no fun for either side. The tweeters arrived two weeks later and were of course installed immediately. The result is truly impressive. Airy, clear highs (previously a weakness of the 752, which tended to ‘hiss’) and a sound image that really thrills me. The ‘old’ Mission 752s seem to me as if they have been swimming in a fountain of youth. Thank you for the good service and the high-quality tweeters. ❣️❣️❣️
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