York Audio Kw 412 M25sh Irs
With its professional-grade captures, intuitive organization, and a tonality that users describe as "fat," "clear," and a "different beast," the York Audio KW 412 M25-SH is not just another IR pack. It is a secret weapon for creating authentic, inspiring guitar tones in the digital domain.
| Feature | York Audio KW 412 M25-SH | York Audio MRSH 412 M25 | | :--- | :--- | :--- | | | Klirrton KW 412 (Premium, modern design) | 1976 Marshall "Checkerboard" 4x12 (Vintage) | | Speakers | Celestion 25w G12M Greenback (8-ohm) | Celestion 25w G12M Greenback (16-ohm) | | Sound Profile | Smoother, mellower, more balanced. Fat and clear. | Brighter, tighter, more aggressive. Great for AC/DC-style tones. | | Best For | Classic rock, hard rock, edge-of-breakup tones, and players seeking a polished, modern-yet-vintage voice. | Players wanting a more immediate, "in-your-face" vintage sound with a tighter low end. |
Includes stereo room mixes to provide a more immersive "amp-in-the-room" feel, especially useful for headphone practice. Performance and Compatibility
Accentuates the critical 1kHz–3kHz guitar frequencies for solos that cut through dense mixes. york audio kw 412 m25sh irs
York Audio employs high-fidelity digital capture techniques to create IRs. The process typically involves the following signal chain:
The York Audio KW 412 M25SH is widely regarded as a IR for vintage British rock and high-gain applications. It captures the specific "greenback" character of low-wattage, pre-rola Celestion G12M-25s—known for their woody mids, soft highs, and aggressive but non-brittle attack.
Contains IRs based on Scott's personal mic placements using a Shure SM57, ranging from "57-9" (brightest) to "57-1" (darkest). Fat and clear
Using the pack, you are not just getting "a rock tone." You are getting distinct flavors. Let’s look at the star players in the folder.
The magic of this pack lies in the "Mix" files. Justin York uses a multi-mic array (dynamic like the SM57, ribbon like the Royer 121, and condenser like the MD441) and aligns the phase perfectly by hand by moving the actual microphones millimeters in real life , not digitally aligning them afterward. The result is a —you feel the cabinet thump against your chest, even through studio monitors.
It’s common for guitarists to wonder which Greenback pack to buy. Here is a simple comparison to help understand the differences between the and the MRSH 412 M25 : | | Best For | Classic rock, hard
Studio-ready, pre-blended configurations designed to avoid option paralysis.
The York Audio KW 412 M25-SH is more than just an impulse response library. It is a virtual ticket to the backline of a guitar hero, a meticulously crafted tool that empowers you to achieve world-class recorded guitar tones from the comfort of your home studio. If you seek a smooth, thick, and incredibly musical Greenback sound, this pack is a masterclass in digital tone and an easy recommendation.
If you are interested in exploring more about York Audio IRs, I can: Compare these Greenback tones with their V30 (Mesa) cabs Provide tips on how to blend these IRs for a stereo setup Share public link