Martin Audio MH212 driver help |
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MrScy
Registered User Joined: 23 June 2017 Location: South Africa Status: Offline Points: 34 |
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Posted: 08 November 2018 at 3:36pm |
Hi all,
I might get 4 Martin Audio MH212 with burned drivers, I am reluctant to replace the same model RCF woofers as they look under powered according to the spec sheet, 150W continuous , with 2 per box yielding a Max 126dB at 1 M. How good do these cabinets sound and how loud are they? Has anyone upgraded them to newer more powerful/efficient drivers for better sound quality and higher SPL? Any further advices? Regards,
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montek.co.za
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11155 |
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Very old design now (40 years) but still sound good...the problem you may have replacing the drivers is fouling of the phase plug on the cone/dustcap if you use anything other than the originals. These came with either RCF or ATC drivers depending on the year.
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Be seeing you.
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7216 |
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I have 4 of those with the original ATC driver and they are great cabs. The ATC´s are very efficient - around 99dB @ 1W/1m. I´m not sure about the RCF´s, but I imagine that they must be the same. The cabs definitely are loud - and 'project' a long way. You may need to experiment a bit finding a driver these days, but most can be made to fit by cutting out and inverting the dustcap! Just Google "atc driver specs" and you´ll find the pdf with all the old ATC drivers. Mine use the PA75 314 - all the specs are there. You´ll just need to find a match. Also, the secret will be in finding something efficient, don´t worry too much about the power. |
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Earplugs Are For Wimps!
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jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11155 |
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I believe the RCF version was the L12p24,which, like the ATC, had a 3inch coil,and a very shallow dustcap. You wont be able to fit a driver with a 4 inch coil, but as Earplug suggests, try and find one with similar specs to the ATC with a 3 inch coil.
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Be seeing you.
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MrScy
Registered User Joined: 23 June 2017 Location: South Africa Status: Offline Points: 34 |
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Thank you for the responses.
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montek.co.za
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MrScy
Registered User Joined: 23 June 2017 Location: South Africa Status: Offline Points: 34 |
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What size of crowd can you do/have you done with 4 of them outdoor for musical events?
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montek.co.za
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7216 |
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They´ll do 500-1000 people without too much problem. Depends on
genre of muzak - and if live group, or dj. For latter, you may need
more bass bins than mids! I especially like the sound of vocals and drums with them. Very natural. |
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Earplugs Are For Wimps!
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MrScy
Registered User Joined: 23 June 2017 Location: South Africa Status: Offline Points: 34 |
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I am sold, i was reluctant to buy them . Thank you once again for your input.
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montek.co.za
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concept-10
Young Croc Joined: 17 May 2016 Status: Offline Points: 1293 |
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Epic cab even by today's standards, actually designed by David Lythe (Volt loudspeakers) when he worked at Martin, if you can find a suitable driver you can always change the dust cap for a lower profile one from another manufacturer, Volt used to make some aluminium 3" ones for horn loading, some higher power handling drivers would bring these right up to date, good luck
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MrScy
Registered User Joined: 23 June 2017 Location: South Africa Status: Offline Points: 34 |
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Which DIY subs may work well with the MH212 except the Martin 115/215 ?
I prefer 15", Martin suggests running the MH212 from 250hz-1.5KHz so I will need to build something that can play 45/50Hz to 200Hz at least.
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montek.co.za
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Pinyorouk
Young Croc Joined: 31 January 2011 Status: Offline Points: 551 |
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Resurecting this thread. I have some ATC "monster mids in Martin Audio cabinets. Unfortunately someone decided to let off a siren sound at high volume unexpectedly which caused the speaker cone to hit the phase bung. Result was that the wire leading to the voice coil got snapped. I removed the speaker dust cover. Luckily I was able to repair the break. Problem now is with the dust cap. I can't find one as flat as the original one. I have been able to find one where if I invert it... There is clearance between the bung. More than before.
My question is, will fitting an inverted dust cover affect the performance. Also, can I use ordinary contact adhesive to glue the dust cover? Thanks
Edited by Pinyorouk - 22 December 2020 at 11:52pm |
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I-shen Soundboy
Registered User Joined: 21 December 2016 Location: Big Smoke Status: Offline Points: 375 |
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Try a cut down dust cover from a speaker with a larger voice coil.
The larger curvature radius should yield a flatter profile. Cutting it into a clean circle of the right size could be the hardest part.
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