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OwnHammer

412 MRBW GNR M25 MMMC

412 MRBW GNR M25 MMMC

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The 412 MRBW GNR M25 Massively Multi-Mic Collection (MMMC) impulse response library captures and is seeking to recreate the sound of a 1971 MarshallĀ® 1960B 4x12 closed back cabinet with basketweave salt-and-pepper grillcloth loaded with pre-Rola CelestionĀ® 75-Hz G12MĀ speakers.

Originally released in 2018,Ā this library's sound and feature set has been remadeĀ in 2025 to be easier to navigate and use with today's tools, workflows, and upcoming OwnHammer software.

Impulse response files are provided in Wave Audio Format (.wav), and have been minimum phase transformed using a proprietary algorithm.

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Not only is this type of vintage cabinet and speaker of the most legendary and sought after configurations in Rock and Roll history since its introduction in the 1960's, used by some of the most iconic players to pick up the instrument of electric guitar, but this EXACT specimen was used for the primary guitar parts on the album "Chinese Democracy" by Guns N' Roses, making it a specific part of Rock and Roll history which has now been immortalized for personal use through this impulse response library product.




VOICINGS


The speaker was shot in such ways as to result in three distinct voicings:
GNR = Greatly Neutral Response
MED = "Median"; between GNR and RAW
RAW = wild, hairy, and untamed



GNR

MED

RAW




MICROPHONES


Condensers

C12
C30
C32
C67S
C67T
C70
C84
C87S
C87T
C88
C200
C414
C2011
CIWI
Dynamics

D5
D6
D7B
D20
D30
D57B
D57M
D57V
D58
D88
D201
D409
D421M
D421V
D441
D545M
D545V
D549
D906
Multi-Element

M2500
Ribbons

R92
R121
R160
R313
RFAT




CUSTOM MIXES:

Three different multi-mic mix groups are provided, each with their unique sounds and inherent options:

Custom Mixes
a large assortment of mix types that were created after the initial release

Legacy Mixes
the mix types from the original release

Mic Pair Mixes
all dual mic combination permutations






FILE FORMAT:

All impulse responses in this library are provided in wave audio (.wav) file format, which is compatible with most hardware and software loaders. All files are mono channel count, 24-bit, have been minimum phase transformed using a proprietary algorithm, and provisioned in 44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz sample rates.


COPYRIGHT NOTICE

OwnHammer products are licensed, not sold. Purchasing content from OwnHammer grants you temporary license to use the products, but does not grant ownership or rights to redistribute or create derivative works, all of which still belong solely to OwnHammer, LLC. For more information, please see the TOS and EULA.





Frequently Asked Questions




Yes, if the platform in question accepts wave audio format (.wav) files in 24-bit resolution, mono channel count, and at 44.1, 48, 88.2, or 96 kHz sample rate.

If verification is necessary prior to making a commercial purchase, this can be accomplished via the IR Freebie.




This question is best asked to the loading platform provider, as they will have official knowledge of their platform's operations and requirements. OwnHammer wave audio format IR's are provided in 24-bit resolution, mono channel count, and at 44.1, 48, 88.2, and 96 kHz sample rates, should you need to confirm those specifics against 3rd party documentation or with 3rd party platform support.

In DAW environments, it is always best to use IR files that are the same sample rate of the project/session, as you cannot be certain that the IR loader you import the IR into has sample rate conversion correction capabilities.

Additionally, in the event that the platform in question finds itself in the below list, some information on known/submitted platforms and their native operating formats and requirements can be found at:

Tutorials :: File Formats




OwnHammer is not officially qualified to answer on the behalf of any 3rd party entities regarding their products' functionality, and this question is best answered by the 3rd party platform provider via their documentation or customer support.

While not a substitute for official 3rd party documentation or media, the following tutorial pages contain information and media that may be helpful :

Tutorials :: Fractal Audio
Tutorials :: Kemper Profiler
Tutorials :: Line 6 Helix