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Post by opr on Mar 6, 2023 17:57:34 GMT -6
O.P.R PLAN 251 ULTRALUX visit for details and pre sales special offer. The OPR-PLAN 251 ULTRALUX!
The 251 is considered one of the finest microphones ever made and has featured on countless classic recordings the world over. Original vintage units now fetch around 30k+US! which is well beyond the reach of most and a price point that places them in the hands of collectors rather than artists.
ENTER THE OPR PLAN 251 ULTRALUX!
Features a true to the original hand wired circuit constructed on acrylic, just like the original. Premium components are used throughout for maximum sonic quality. The tube is a hand selected 6072a and our OPR-T/14 transformer shares the sonics of original. Last but not least our brass CK12 capsule replica is true to the original multi-chambered design precision machined and tuned to exacting standards here' at O.P.R lab in Melbourne Australia.
Think Airy highs and robust warm lows with a presence and brilliance that no other mic can deliver.
The sound heard on a million classic recordings the world over!  ![]()
 OPRCK12 Australian made by O.P.R Microphones
accurate Brass Ck12 replica
Two new PLAN 251 PCB versions available with either our OPRCk12 capsule or the budget PLAN 12 Capsule edge terminated capsule.  
New addition!
All pre orders now come with free with a STOCK MOD SWITCH.
The Stock mod switch gives the option of switching between two different output capacitor types for different Frequency, transient and harmonic behavior.
The Standard (STD) position runs the signal through an electrolytic capacitor which is what you'd find in an original 251 and the (MOD) position runs the signal through a modern film type capacitor which many 251 mics in professional use today have been modified with.
The two capacitor types offer different sonics .ie The electrolytic output capacitor sounds a little more colorful and the film is more neutral.
Normally $199.00
(currently free for pre sales special customers)
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kcatthedog
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Post by kcatthedog on Mar 6, 2023 19:30:03 GMT -6
Welcome, send one to Johnkenn to demo !  |
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Post by plinker on Mar 6, 2023 20:25:45 GMT -6
The circuit is well known. I'm REALLY curious about that capsule!
Can you tell us more?
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Post by aremos on Mar 6, 2023 20:29:47 GMT -6
OPR used to use CT-12's (Tim Campbell) or you could choose it. Don't know if they still do but maybe they can tell us more here &/or if there's an option for other capsule, etc.
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Post by hadaja on Mar 6, 2023 20:38:12 GMT -6
Mark has been perfecting and making his own ck12 capsule for some time now. Although i am yet to personally experience it, i know of at least 1 x usa mic manufacturer who uses it over others.
It is on my list of to try out 251’s.
it would be good to know the special price of this mic for RGO members.
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Post by Johnkenn on Mar 6, 2023 21:01:44 GMT -6
Welcome, send one to Johnkenn to demo !  |
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Post by opr on Mar 6, 2023 21:06:08 GMT -6
Thanks for the replies. Yes I've been making Ck12 for around a decade it's accurate to the original threaded asymmetric secondary back-plates diaphragms gaps setup between 78 and 85 pf are tuned to original spec and operate optimally at around 60v. Here's a sample of it being used in an 87 type mic so it's a little different circuit wise but I'll try and get some vocal demos for the 251 soon! The prices are in Aussie dollars so US customers will get a significantly lower price!
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kcatthedog
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Post by kcatthedog on Mar 7, 2023 2:35:50 GMT -6
$2500 aud plus shipping , taxes , duties, etc..
$1700 usd, $2300 cdn
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Post by mcirish on Mar 7, 2023 9:19:07 GMT -6
I've wanted a 251 since we had one in the studio for a few weeks. I must resist.....
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kcatthedog
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Post by kcatthedog on Mar 7, 2023 9:42:24 GMT -6
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Post by Deleted on Mar 7, 2023 16:15:26 GMT -6
well this is my next, next mic i get
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Post by opr on Mar 7, 2023 20:06:20 GMT -6
Hey all, I''ve made a couple of quick samples just to give you an idea of the sonics. The male vocal and acoustic guitar was done by me totally improvised  (I'm not really a singer!  guitar is my main instrument. I also made a quick mono drum overhead(I'm no drummer either lol!) but just to give you the idea. I'll try to get some vocals going from a real singer soon.
Please excuse the performances I did say quick! oh yeah the acoustic guitar used is in need of a string change too!...
Also as the Ck12 can be tuned in a plethora of ways I'm happy to custom tune to your liking should you be shooting for something brighter or darker than my standard tuning which is in the middle of the spectrum.
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Post by opr on Mar 7, 2023 20:18:32 GMT -6
Also I'll get one to Johnkenn at some point I have limited parts at the moment.
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Post by Deleted on Mar 11, 2023 4:02:25 GMT -6
This piece of audio gear is still living rent free in my mind.
Lets just get to the brass (CK12 capsule) tacks here,
will there be a giveaway? ahaa
On a serious note why do i have the impression more tube mics are yet to be revealed
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Post by opr on Mar 22, 2023 0:44:22 GMT -6
Hey all! Just letting you know that I'm offering two new O.P.R PLAN 251 versions versions which are available with either our accurate OPRCk12 capsule or the budget PLAN 12 Capsule edge terminated ck12 style capsule. All the details can be found HERE
CAPSULE OPTION A
CAPSULE OPTION B
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kcatthedog
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Post by kcatthedog on Mar 22, 2023 3:59:35 GMT -6
Will you be posting a sound clip comparison: pictures only sound so revealing ? |
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Post by Deleted on Mar 23, 2023 14:02:26 GMT -6
What he said ^ Except the grain on that capsule is giving me some sound right now
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Post by opr on Mar 26, 2023 16:55:22 GMT -6
The singer is Maddy Herbert a very talented singer from Melbourne Australia the her band is Velvet Bloom.
I should have the a male vocal up shortly. |
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Post by opr on Mar 27, 2023 1:57:37 GMT -6
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Post by opr on Mar 29, 2023 3:11:09 GMT -6
Here's a video sample of the OPR PLAN 251 ULTRALUX for your convenience.
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Post by drumsound on Mar 29, 2023 15:57:48 GMT -6
I'm curious about the differences between the two 251s you offer. Can you give a description and details about them?
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Post by Deleted on Mar 29, 2023 23:18:31 GMT -6
I'm curious about the differences between the two 251s you offer. Can you give a description and details about them? The PCB with ck12 mod will have the same components. The version with the imported capsule will have some different components to compliment the other capsule. |
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Post by hadaja on Apr 3, 2023 16:24:34 GMT -6
Well i am not sure why seeing how i love my Upton, but i am going to take the plunge and support a fellow Aussie and buy the 251. I do love a good 251. Mark was kind enough to do a payment plan system. So i decided lets jump in line for the ride. Will be a while before i can report back. But thanks Mark OPR
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Post by Deleted on Apr 4, 2023 21:28:25 GMT -6
I just got him to do my transformer swap and I plan on getting one from him soon,
A payment plan system you say?
Mark I too might require this the payment plan he speaks of
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Post by opr on Jun 6, 2023 2:40:00 GMT -6
Hey all just a quick update to let you know that the pre order offer closes on the 20th of June and I've added a new, free addition for all Pre Sales customers.
The stock Mod Switch!
The Stock mod switch gives the option of switching between two different output capacitor types for different Frequency, transient and harmonic behaviors
The Standard (STD) position runs the signal through a selected electrolytic capacitor which is what you'd find in an original unmodified 251 and the (MOD) position runs the signal through a modern film type capacitor which many 251 mics in professional use today have been modified with.
The two capacitor types offer different sonics .ie The electrolytic output capacitor sounds a little more colorful and the film is more neutral.
Normal price for the switch option A$199.000 free for pre sales special customers until the 20th of June. 
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(I'm not really a singer! 
guitar is my main instrument. 