IR-03 (Impulse Responses based on the Palmer PDI-03 Speaker Simulator)

The IR-03 package consists of 9 different sounding Impulse Responses which were captured using my trusty old Palmer PDI-03 Speaker Simulator (*).

The PDI-03 has 2 toggle switches for creating different cabinet tones:

  • DEEP: 2 x 4×12 stack with ā€œVā€ EQ curve
  • NORMAL: 4×12
  • FLAT: open back 2×12
  • BRIGHT: top end enhanced
  • NORMAL: British speaker sound
  • MELLOW: American speaker sound

The impulse responses were captured from these 9 combinations and saved as 24 bit wav files in 44.1, 48, 88.2 and 96 kHz formats, making 36 files in total.

Sound demos

Background information

I bought my Palmer Speaker Simulator PDI-03 in the early 90s. It was a total game changer for me. The dynamic sound it gave me in combination with my Koch, Marshall and Vox tube amps was simply astonishing. With the Palmer I was able to get great tones without the need to use a loud amp in the studio. Since then I also started to used the device for live gigs. It made the engineers very happy since the signal was super reliable and punchy.

The PDI-03 is a passive load box combined with a filter. It works without a power supply. The PDI-03 has a very open and punchy sound. It sounds as direct as a DI and has the same tonal characteristics as a speaker cabinet.

Prices are excluding VAT. Will be charged for European customers only.


The PDI-03 Speaker Simulator trademark is the property of their respective owner (Palmer) which is in no way associated or affiliated with Melodiefabriek. The PDI-03 Speaker Simulator name is referenced solely for the impulse responses which were captured from it. Use of these names does not imply any cooperation or endorsement.