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DRIVE UNITS BY MANUFACTURER:
MSH-115
Monacor MSH-115, 4" hifi midrange drive unit.
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Good replacement for ELAC IMF 4/200 found in various IMF models such as TLS50, IMF Compact, Super-Compact & others.
Critically damped pulp cone gives a wide usable bandwidth with a text book response between 400-5000 Hz - excellent linearity, no significant peaks in the response.
The flat profile front chassis allows hassle free flush mounting - no need for a rebate or router.
This versatile driver can replace and upgrade a huge number of midrange units and offers a level of performance that is exceptional at this price.
A full datasheet can be downloaded from this page.
Basic parameters:
Resonant frequency (fs) | 85 Hz | Nominal impedance (Zn) | 8 Ω |
Mechanical Q factor (Qms) | 1.98 | DC resistance (Re) | 6.3 Ω |
Electrical Q factor (Qes) | 0.55 | Max power handling | 120W |
Total Q factor (Qts) | 0.43 | Sensitivity (2.83V/1m) | 89 dB |
Equivalent volume (Vas) | 4 L | Chassis (across flats) | 115 mm |
Here's the full datasheet:
MSH115
I bought a pair to replace aged mids in my IMF Studio Monitors...definitely an upgrade!
Thanks for the review Ross !
Will & Caroline
I replaced my midrange drivers in my IMF Studio TLS 50 Mk1 speakers that are 50 years old at present with these drivers. I am the original owner of these and I have to say after installing these drivers in both of the speakers I just love the results. I couldn’t be happier. They have brought my speakers back to life!
Thanks for the review Frank !
Will & Caroline
Excellent service , product and price A++
Thanks for the review Christiaan !
Will & Caroline
A while ago I revamped a pair of IMF Super Compact 2. The surrounds of the original ELAC mids were cracked and hardened (due to aging of the foam) which is typical for these old mids. I decided to look for a replacement and bought two of these Monacors. In my opinion the Monacor has a more detailled sound but its sensitivity is higher and you here it when it's not compensated for. Simply said; 'the mids are to loud'. It's specified at 89 dB/1W/1m and the average sensitivity of the old ELAC must be about 86 dB/1W/1m. So this issue had to be adressed. Measuring a speaker with the ELAC replaced by the Monacor using a standardized set-up (sw and pro measurement microphone) showed a higher average sensitivity of about 3,5 dB compared to the bass and high frequencies. So an L-pad has been used to attenuate the mids 'loudness'. Now this has been done, the result is great.
Kind regards,
Martin
Thankyou for your review !
Will & Caroline
Monacor 115 out performs anything else on the market at this price buy miles!!!! Super detailed midrange frequencies!! I've installed these into all my IMF TLS 50's and my TLS 50a's wide stereo sound stage!! Highly recommend them! superb! Pete
Thankyou for your review !
Will & Caroline
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Up and running again exactly what I needed. Great job Willys. 10/10👊🏻🫵🏻. From start to finish will be use again in near future for crossover upgrade. 1st time using. 100% will use again
Since 1991, I've had Linn Keilidh speakers, which I upgraded a year later to an active system using the Linn Wakonda and two LK100 power amplifiers. Over the past few years, I’ve considered replacing my audio setup with a more compact active system. However, the downside is that it would require a significant investment to achieve a comparable sound quality.
In the end, I opted for an upgrade of the tweeters and new speaker covers after more than 30 years.
The upgrade itself went smoothly using the supplied solder. I’m very pleased with the end result. The upgrade has had a noticeable impact on the soundstage: the bass, midrange and treble all have more space and clarity within the stereo image. This first became apparent to me when listening to vocals—it’s as if you can perceive the space surrounding the voice. And the longer you listen, the more this spatial detail stands out.
I’ve turned the amplifier up slightly, as creating that sense of space seems to require a bit more power.
It’s an upgrade I can definitely recommend.
Wow, just had my Mission 753 upgrades of crossover and also tweeters. What a difference it’s made! The high frequencies are more refined and OMG, the separation and richness of mud and bass if awesome…..much thanks to Willy’s for giving my 753’s a new life 😀😀
Excellent advice from will as usual and exactly what I wanted. These have improved the sound of my current speakers and taken them to another level. Sounds superb I can hear tonal difference's between things that I never heard before. Superb bass drivers dig so deep.
As usual will has been outstanding.
Brilliant to deal with always helpful and gives great service.
What a brilliant capacitor, from first listen exceptional clarity and depth. Bargain will be buying more.