Dread 35 – Acoustic IR Pack


This Acoustic IR pack captures the incredible tone of Brian’s Martin® D-35 acoustic guitar. These IR’s can be used in any hardware or app that accepts .wav IR files. Get the sound of a world class mic’d acoustic guitar direct. Includes multiple acoustic pickup options to accommodate a wide range of acoustic guitars and pickups.

These are meant to make your acoustic guitar sound incredible. They are not designed to make an electric guitar sound like an acoustic.

Categories: , SKU: IR-002



1. INTENDED FOR USE WITH ACOUSTIC GUITARS: Our acoustic IR’s are intended to be used with acoustic guitars. They are not meant to make an electric guitar sound like an acoustic guitar.

2. CROSS PLATFORM: These .WAV impulse responses can be used in any hardware or application that supports IR’s. This includes products by Line 6 (Helix, HX Stomp, HX Effects, etc), Kemper, Axe-FX, etc.

3. EXPERIMENT: We’ve included multiple options in this IR pack (more details below). The best idea is just to start experimenting with your guitar and find the IR or combinations of IR’s that sound the best. Our recommendation is to first find the pickup type that fits your guitar best (see the pickup options section), and then experiment with different mic options for that pickup type.


These IR’s were created using a Martin® D-35 acoustic guitar from 2003. The D-35 is an iconic model, featuring a spruce top with rosewood back and sides. Its unique 3-piece back involves slightly different bracing than a D-28, resulting in what Martin calls it’s loudest guitar. It truly is a canon, and exemplifies everything a truly classic dreadnaught guitar is known for.


To create this IR pack we used a variety of microphones. Using a Slate VMS ML1, we recreated emulations of classic microphones, as well as an ACG C214 and an Earthworks SR25.

In the file names you’ll see microphone codes. Here is what they mean:

  • C12 – AKG C12 (emulated with the Slate ML1)
  • C800 – Sony C800 (emulated with the Slate ML1)
  • M251 – Telefunken M251 (emulated with the Slate ML1)
  • M269 – Neumann M269 (emulated with the Slate ML1)
  • SM7 – Shure SM7 (emulated with the Slate ML1)
  • U47 – Neumann U47 (emulated with the Slate ML1)
  • U67 – Neumann U67 (emulated with the Slate ML1)
  • SR25 – Earthworks SR25
  • C214 – AKG C214

Each of these mics (and mic emulations) will give you a different flavor. Some are extremely accurate (the Earthworks is legendary for their accurate mics, and the SR25 sounds fantastic), some are warm and vintage (try the Neumann and Telefunken options), and others are clear and bright (the C800 and C214). Try different mic options with your guitar to see what sounds best.


There are many different acoustic pickups options out there, and we have given you multiple options to accommodate a wide range of guitars. Here is what you get:

  • Piezo: If your guitar is equipped with an under saddle piezo, try these first (although we have had great luck with the ‘SB’ IR’s using piezo-equipped guitars.
  • SB1: The ‘SB’ options denote pickup microphones that are attached to the bottom of the sound board on an acoustic guitar. These include the mic portion of the LR Baggs Anthem, the K&K Pure Western transducer pickups, etc. For the ‘SB1’ options, we used the full microphone setting of the LR Baggs Anthem pickup installed in Brian’s Martin D-35. These are the darker of the two SB options.
  • SB2: For this setting, we used the full microphone setting of the LR Baggs Anthem pickup installed in the McPherson Camrielle. These are the brighter of the two SB options.
  • SB Blend: These IR’s were made by blending the ‘SB1’ and ‘SB2’ IR’s, achieving a balance between the two – a great starting point for any guitar.


This pack includes 36 IR files (four pickup options from each microphone type), available in four different sample rates: 44.1k, 48k, 88.2k, and 96k (all 36 IR’s come in all sample rates – all at 24 bit).


2020-05-04: Version 2.0

  • All reference recordings were re-done
  • Changed: All IR’s have been updated to the re-recorded reference files.
  • Added: Two new Piezo (Pz) pickup options for each microphone option. There are now six different pickup options to choose from per microphone option.
  • Removed: The C214, M7, and U47 microphone options were removed.
  • Added: 57v, m222, and C414 microphone options were added – these sound better than the ones we removed 🙂

2020-04-20: Initial Release


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