Schmalle

This is no speculation. The amp models replicate the speaker out signal of an amp. It matters what load / cab is connected when modeling. How much depends on how much current feedback the amp has. The impedance curve is an electrical frequency response of a speaker and it is indeed imprinted in the model. IRs on the other hand only contain an acoustic frequency response.

What's the recipe for a McDonalds burger? Tip no. 1: specify the target tone. Edit: Tip no. 2: for OD1 channel sound the Badonk is closest.

Amp blocks because the Catalyst has a neutral class D power amp. Preamps are more for coloring (tube) power amps. That's just a general rule of thumb though - there are preamps that are designed for flat or flat-ish power amps.

For me a big step was to use the York Audio Marshall V30A Mix1 as a reference point. It is the filter that connects my amp's speaker out or amp sims with a flat speaker (studio monitors) and sounds like the cab I love. It feels like being able to virtually go into the recording room and play through a real cab. Most amps sound great through it. That said I use the Helix cabs quite a lot as a tone shaping tool - really fun stuff. And if you're after some recorded / in the mix tones that's a great way to get there.

As far as real amp vs modeler I A/B'ed my Laney AOR tube amp against the HX's Brit2204 + class D amp into the same cab. I could make them sound and feel almost identical to me in that experiment. I noticed that on several models the default sag is quite low when compared to the real deal or my AxeFxII. This can result in a too stiff or harsh sound. Some models are great on default settings, most can be tweaked to sound and feel right and some just are just bad amps IMHO. The whole FRFR thing has more parameters to it when compared to a powered cab. Basically what you want your FRFR to be is a good representation of the PA. And you want to find a filter (cab sim / IR / eq ) that makes it (and therefore the PA) sound like a cab you like.

Warwick Gnome and TC Electronic BAM200 are popular. class-d bass-head discussion I would not recommend the popular and cheap Harley Benton GTA-100 for bass because it cuts lows with higher volume.

A thing to notice it that there are two Brit P75 + cab blocks - one with a new cab and one with the legacy cab. I like the old one better (the one in the video) in this case. To match the new one with the legacy one I suggest to change the cab settings: 4x12 Blackback30, 57Dyn, 4.0, 2.00", 45°, 80Hz, 5.7kHz I saved this as user default settings for this amp.

In Global settings -> Preferences make sure to use EXP1 and not EXP2.

Linear 10kOhm pot is recommended. Yes. Did you try the L6 Mission on the XL?

A great thing that no one does is to record a sample before changing things - like updates, factory resets, string changes etc. Easy and much more objective than relying on memory - also it can be shown to others.

Correlation is not causation - you're the first person I'm aware of that attributes dull-ness to the 3.5 update. Probable candidate causes that came to in my mind: guitar faulty or tone knob closed longer cable lower input impedance setting global eq

That can't work. The HX send to BSP return connection doesn't do anything in this case. If you plug your instrument in the BSP's Instrument In then you don't need the FX loop functionality of the HX. BSP Send -> HX In, HX Out -> BSP Return

How can you hear your normal tone with the HX bypassed? If the HX is bypassed - so should be the preamp of the D20. Are you inadvertently using the D20's loop set to 'pre'?

I think the idea is: a sensor block as a sender (to define where to measure in the signal chain) and a controller as a receiver (to use it on any parameter).

Harley Benton GPA-100 is cheap, loud and sounds good. 230V required.

Same here.

Headrush to Soundog: No matter how hard I try You keep pushing me aside And I can't break through There's no talking to you

Setting Stomp Select to Off does what it says - it does not however disable touch in general. In Stomp Mode the assign message comes up after 1 sec of touching and goes away after 3 secs - I think one can live with it. You can however change to Preset or Snapshot or Scroll Mode (Press View and then <-Page or Page->) if needed.

Open a support ticket.

Read the schematic just for fun - interesting transistor preamp. Input impedances: 1: 220kOhm 2: 84kOhm Good ears!

What amp are you using? Input 2 of Fender amps and low input on Marshall usually have 136kOhm impedance (hence this value is in the Helix's list). You mentioned earlier that your guitar sounded great with your amp using 4CM - you didn't use a lower input impedance in that scenario, right?

Nice flagship floorboard at a very nice price. If I'd be in the market for a new full-featured device this would be my prime pick between Helix / HR Prime / FM 9 / Kemper Floor / Quad Cortex. It would need to pass my audio comparison against the HX Stomp though.

Global EQ? What are you listening your Helix through - amp, headphones, studio monitors?

Ask for an exchange of the product within warranty. Ask for a carbon free exchange if you want to have some fun.

You have been in Snapshot mode and normally run in Stomp mode. There are four different modes: Stomp, Scroll, Preset and Snapshot. Press View to select Play view and then step through the modes with <-Page or Page->. Read the manual to get the most of your Stomp - but definitely read the Cheap Sheet!