BadKat C40 TM – Line 6 Helix Patch


Line 6 Helix patch featuring our Bad Cat Cub III 40 amplifier. For this patch, we’ve tone matched the Helix to the actual amplifier, resulting in patch that sounds almost exactly like the amp. Includes custom made Impulse responses, options for single coil and humbucker guitars, stomp-box and snapshot layouts, and more.



1. UPDATE YOUR FIRMWARE: Please upgrade the firmware on your Helix and the HX Edit software from Line 6 to the latest before installing this patch. Even if your Helix is up to date, the ‘HX Edit’ app needs to be updated as well. If you get an error importing a patch, the problem is most likely outdated firmware on your Helix/HX Edit.

2. IR’s INCLUDED: This download includes Impulse Responses that are custom made for this preset. The IR’s acts as both the cab/speaker portion of the signal chain, and the tone matching that makes this patch sound just our Bad Cat Cub III 40 amplifier. For this reason, we do not have a ‘stock’ version of this preset, and you must use the IR to get the intended result.

Here are the IR’s included:

  • WT BadKat C40 AX TM HX (top row)
  • WT BadKat C40 EF TM HX (top row)

With Firmware 2.90, Helix should recall the IR based on its name rather than slot number, so it shouldn’t matter which slot you import the IR into. If you do get an error regarding IR locations, simply confirm that the IR’s are loaded into the correct blocks in the Helix and re-save the patch.


This download includes two patches as well as the IR cabs. The patches are:

  • BadKatC40 WT TMs – This patch uses the IR’s and is meant for guitars with single coils or low output humbuckers
  • BadKatC40 WT TMh – This patch uses the IR’s and is meant for guitars with more traditionally voiced humbuckers
  • NOTE: There is no stock cab version of this patch – tonally it is dependent on the included IR cabs.


  1. Connect your Helix to your computer using a USB Cable
  2. Download and instal the ‘HX Edit’ app from Line 6
  3. In the ‘HX Edit’ app, drag and drop the patch into a slot in the ‘PRESETS’ column
  4. To import an IR, switch to the ‘IMPULSES’ column (next to the PRESETS column), and drag & drop the IR into the an open slot.
  5. PLEASE NOTE: If you do not have the IR loaded into the ‘IMPULSES’ column, the patch will not sound correct, even if you have the IR block on – you must drag and drop the IR into the IMPULSES column.


For this preset, we tone-matched the our Bad Cat Cub III 40 amplifier into the Helix. To do this we created a custom impulse response that matches the stock HX amp model(s) to our actual amp. These impulse responses completely transform the HX amp models – they sound exactly like our Bad Cat, and the microphones, preamps, and EQ chain that we use to record it.

This patch includes Tone Matches of both channels of the Bad Cat – the 12ax7 channel and the EF86 channel. The 12ax7 channel has more chime and brilliance – it sounds more like a Top Boost AC30. The EF86 channel has more low-mid response and sounds thicker, but still has a ton of chime and bite.

By default, the patch includes both the 12ax7 channel and EF86 channel in a stereo configuration. Sort of like jumping the amp (which isn’t actually possible with the real amp). If you would like just the 12ax7 channel to be represented in the patch, simply copy and paste the top amp and IR blocks into the bottom amp and IR blocks. If you would like just the EF86 channel to be represented in the patch, simply copy the bottom amp and IR blocks into the top amp and IR blocks. 


  1. Input
  2. Deluxe Comp – not mapped to a switch, always on
  3. Dual Pitch – not mapped
  4. Jumbo Fuzz – dialed in to mimic Brian’s Basic Audio Scarab fuzz – mapped to a button labeled ‘SCARAB’
  5. Heir Apparent (low gain) – mapped to switch labeled ‘KOT’
  6. Scream 808 – mapped to switch labeled ‘808’
  7. Volume (log curve) – mapped to EXP 2
  8. Tremolo – mapped to a switch labeled ‘Tremolo’
  9. Transistor Tape – 1/8 note delay – mapped to switch labeled ‘Soft Delay’
  10. Vintage Digital – 1/8d delay – mapped to switch labeled ‘.8th DLY’
  11. Dual Delay – Dual Delay (1/8d + 1/4) – mapped to switch labeled ‘Dual ST DLY’
  12. Dynamic Hall Verb – ambient reverb – mapped to a switch labeled ‘Dyn Hall Big’
  13. Chorus – mapped to a switch labeled ‘Chorus’
  14. Plate – Mapped to a switch labeled ‘Plate’
  15. Amps – Matchstick Ch 1 (this is the 12ax7 TM amp), Matchstick Ch2 (this is the EF86 TM amp)
  16. IRs – see above for IR info
  17. Cali Q EQ – Always on EQ – Use this EQ to make tonal tweaks for your guitar/setup. These controls will affect your tone differently than the amp controls.
  18. Gain – used for a solo boost in snapshots
  19. Output


This patch is meant to be used in either stompbox or snapshot mode. We recommend setting up your Helix to use all ten stomps (stompbox mode) or all eight snapshots (snapshot mode). The Helix LT does not allow 10-button stomp mode, so you’ll have to re-arrange the button assignments to suite your preferences.


All the wet effects (reverbs and delays) are positioned in front of the amplifiers in this patch. This recreates the experience of using a stereo pedalboard into stereo amps. The character of the reverbs and delays is greatly affected by the amps themselves. This is also why there is no ‘amp gain’ functionality in this patch.


Everything after the EQ block (after the amp) runs in stereo. If you are able to run stereo, the wet effects will sound bigger and better. If you only use the L/Mono output of the Helix, everything will be summed to mono automatically. NOTE: Do not use just the Right output of the helix – some of the delays will not be audible if you do this.


There are eight snapshots included in this patch to get different sounds (all patches feature the same snapshots).

They are:

  • Snapshot 1: CLEAN. This is the base clean tone with delay.
  • Snapshot 2: DRIVE. Light overdrive.
  • Snapshot 3: DRIVE +: Bigger overdrive
  • Snapshot 4: P&W LEAD – Lead tone with lots of reverb and delay
  • Snapshot 5: AMBI CLEAN – Ambient Clean tone
  • Snapshot 6: 80s CLEAN– Clean tone with chorus
  • Snapshot 7: FUZZ – Big gain fuzz tone
  • Snapshot 8: SWELLS – Big ambient swells



All guitars are different, so you may want to make changes to suite your playing style and guitar. We set this up with a variety of guitars, including both single coils and humbuckers (primarily a Telecaster style guitar). If your guitar has humbuckers, please refer to the suggested settings below.

We recommend making a copy of the patch and changing the copy just in case you want to revert back to the original. 

We’ve included both single coil and humbucker voiced patches to serve as starting points for your guitars. To make adjustments, we recommend starting with these parameters:

  • Amp Gain: Adjust the min/max values of the amp gain so that your guitar is slightly breaking up with big chords on the bridge position (without any drive pedals on)
  • Amp EQ controls: Adjust these to suite your individual guitars/taste
  • Cali Q Graphic EQ block: This is a simple way to adjust the overall tonal characteristics of the patch.


If you would like to make this patch louder or quieter without affecting tone, the following adjustments can be made:

“Ch Vol” control on the amp module. This will increase or decrease volume without affecting the tone of the amp. This is the primary level adjustment tool I use for changing patch volumes.

Output block level. Changing the level control on the output block (the very last thing in the signal chain) will increase or decrease overall volume. We typically have this set at zero, but feel free to adjust this as you see fit.


Initial Release (1.0): 2022-05-28


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