York Audio MRSH 412 MV30-Dual [IRs]

• Product: MRSH 412 MV30-Dual
• Publisher: York Audio
• Format: Impulse Responses (IRs)
• Source: yorkaudio.co/product-page/mrsh-412-mv30-dual

The York Audio MRSH 412 MV30-Dual Cab Pack is a guitar IR library based on a 1999 Marshall 1960bv 4×12 cabinet loaded with Celestion G12 Vintage speakers. It includes 336 high-resolution WAV IRs across single-mic, multi-mic, and blended captures, providing thick low end, forward mids, and smooth highs with tonal versatility across rock and modern styles.

Dual Speaker IR Pack Based On A 1999 4×12 Cabinet

The York Audio MRSH 412 MV30-Dual Cab Pack is an impulse-response library captured from a 1999 Marshall 1960bv 4×12 cabinet equipped with two Celestion G12 Vintage speakers, each with its own sonic character. Instead of picking a single best speaker, the creators recorded both distinct sources — labeled MV30a and MV30b — to preserve the full tonal personality of the cabinet.

The low end is described as thick and chunky, the midrange carries a forward British “snarl,” and the top end remains smooth and airy without the pronounced fizz found in newer cabinets. This unique speaker mix sits somewhere between classic Greenback warmth and contemporary Vintage 30 aggression while maintaining a distinct voice of its own.

Extensive IR Content With Multiple Mic Captures And Blends

The MRSH 412 MV30-Dual pack includes 280 single-mic captures, 56 multi-mic mixes from each speaker, and “BLND” blends that merge the two sources, totaling 336 distinct IR files. A broad microphone palette was used, including dynamic mics like SM57 variants and MD421, ribbon mics like Royer R-121, and large-diaphragm condensers including Telefunken U47 and Neumann KM184. Ambient captures are also included from multiple room positions.

Both Natural Phase and Minimum Phase versions are provided, and files are delivered as high-resolution WAV (24-bit at 96 k, 48 k, and 44.1 k). This ensures compatibility with modelers and IR loaders such as Fractal Audio Systems™, Line 6™ Helix, Strymon™ Iridium, BOSS™ units, Atomic™ Amplifire, and Kemper™ rigs.

Two Speaker Personalities For Tonal Flexibility

Speaker MV30a delivers bigger low end, balanced mids, and airier highs, making it versatile through both vintage and modern amp voices. Speaker MV30b is tighter in the lows, has more pronounced upper mids, and a slightly tapered top end, making it better suited for punchier rhythm tones or boosted midrange character. Both can be used independently or blended for broader tonal coverage.

Because of its dual-speaker capture and mix options, this cab pack can adapt well to different rock and metal tones. Users on guitar forums note that the MRSH 412 Dual offers tone flexibility and solid low-mid response, sometimes compared favorably with other third-party IR packs.

Dual Speaker Character With Broad IR Coverage

York Audio MRSH 412 MV30-Dual delivers a wide set of guitar cabinet impulse responses built from two distinct Celestion G12 Vintage speakers in a classic Marshall 4×12, providing flexibility and depth for DI and modeler workflows.

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