Helix Models
This is the most comprehensive list of models and blocks that you can find for every amp, cab, distortion, modulation, pitch, and other effects found on the Line 6 Helix, Helix Rack, Helix LT, HX Stomp, HX Stomp XL, HX Effects, and Helix Native.
Cab: Single Legacy
Found 41 single legacy models.

Soup Pro Ellipse
Based on: 1x6x9" Supro® S6616

1x8 Small Tweed
Based on: 1x8" Fender® Champ
1x10 US Princess
Based on: Fender® Princeton Reverb cab
Firmware version: 3.00
1x12 Field Coil
Based on: 1x12" Gibson® EH185
1x12 Fullerton
Based on: Classic 1953 Fender® 5C3 Tweed Deluxe
Firmware version: 2.90
1x12 Grammatico
Based on: Modern 2016 Grammatico LaGrange
Firmware version: 2.90
1x12 US Deluxe
Based on: 1x12" Fender® Deluxe Oxford
1x12 US Princess
Based on: Fender® Princeton Reverb with a 12" Alnico Blue driver
Firmware version: 3.00
1x12 Celest 12H
Based on: 1x12" ÷13 JRT 9/15 G12 H30
1x12 Blue Bell
Based on: 1x12" Vox® AC-15 Blue
1x12 Lead 80
Based on: 1x12" Bogner® Shiva CL80
1x12 Cali IV
Based on: MESA/Boogie® Mk IV 12"
1x12 Cali EXT
Based on: MESA/Boogie® 12" extension (EVM12L speaker)
2x12 Double C12N
Based on: 2x12" Fender® Twin C12N
2x12 Mail C12Q
Based on: 2x12" Silvertone® 1484
2x12 Interstate
Based on: 2x12" Dr Z® Z Best V30
2x12 Jazz Rivet
Based on: 2x12" Roland® JC-120
2x12 Silver Bell
Based on: 2x12" Vox® AC-30TB Silver
2x12 Blue Bell
Based on: 2x12" Vox® AC-30 Fawn Blue
2x12 Match H30
Based on: Matchless® DC-30 (12" G12H30 speaker)
2x12 Match G25
Based on: Matchless® DC-30 (12" Greenback 25 speaker)
4x10 Tweed P10R
Based on: 4x10" Fender® Bassman® P10R
4x12 WhoWatt 100
Based on: 4x12" Hiwatt® AP Fane®
4x12 Mandarin EM
Based on: 4x12" Orange® Eminence
4x12 Greenback 25
Based on: 4x12" Marshall® Basketweave G12 M25
4x12 Greenback 20
Based on: 4x12" Marshall® Basketweave G12 M20
4x12 Blackback 30
Based on: 4x12" Park® 75 G12 H30
4x12 1960 T75
Based on: 4x12" Marshall® 1960 AT75
4x12 Uber V30
Based on: 4x12" Bogner® Uberkab V30
4x12 Uber T75
Based on: 4x12" Bogner® Uberkab T75
4x12 Cali V30
Based on: 4x12" MESA/Boogie® 4FB V30
4x12 XXL V30
Based on: 4x12" ENGL® XXL V30
4x12 SoloLead EM
Based on: 4x12" Soldano
1x12 Del Sol
Based on: Sunn® Coliseum 300 bass cab (12" speaker)
1x15 Ampeg B-15
Based on: 1x15" Ampeg® B-15
1x18 Del Sol
Based on: Sunn® Coliseum 300 bass cab (18" speaker)
1x18 Woody Blue
Based on: Acoustic® 360 18" bass cab
2x15 Brute
Based on: 2x15" MESA/Boogie® 2x15 EV
4x10 Ampeg HLF
Based on: 4x10" Ampeg® SVT® 410HLF
6x10 Cali Power
Based on: 6x10" MESA/Boogie® Power House
8x10 Ampeg SVT E
Based on: 8x10" Ampeg® SVT®