If you dislike the hassle and complexity of the 4CM, as well as the potential additional failure points using multiple cables, and I feel the same way, you may want to go with an FRFR solution, which is what I use. The downside is you do still have to carry a monitor with you to gigs but there are some fairly light ones available now. The virtue of using an FRFR is that what you hear on stage tends to be very close to what the audience is hearing making it a great platform to dial in tones that work for you and the FOH. You also get to enjoy the varied selection of amps, cabs, and captures available on the QC, uncolored by your âinsert brand name hereâ amp/cab. Using an FRFR, when dialed in correctly, can get you closest to an authentic rendition of all the amp, cab, and capture variations available on a modeler.
One caveat with using an FRFR is there is more of a learning curve and you may find that dialing the EQ in on the QC a little tricky at first as the FRFR will not have the same inherent limitations that a, for example, Celestion speaker would have in terms of frequency response (dramatic drop-off for example around 5khz) as well as a narrower frequency range (not the 20hz - 20khz range you commonly see on an FRFR).
Some players prefer using a traditional guitar amp and cab with their modeler as it can be easier to dial in the tones they are used to hearing and has a âfeelâ they are accustomed to. The drawback is if you are playing for example through something like a Marshall amp/cab, you will probably tend towards one of three choices.
With the Marshall, the first option would be going directly into the guitar input of the Marshall and using the QC for effects only. The second option would be 4CM which you already stated you donât like. The third option would be going in through the return loop of the Marshall (directly into the power amp section bypassing the preamp) which means you probably wonât be using the QCâs cabs or cab captures. If you do, your Marshall will color them and they will probably sound farther from an authentic model of a Vox, Boogie, etc⌠Not to speak of the fact that you would be putting a virtual cab through a real cab. Usually not recommended but still an option. Your stage sound will also likely be further from what the FOH is hearing. Still, many love this approach and the sound of their favorite traditional amp/cab leveraging the modelers amps and effects.
Putting the QC through a clean platform like an SD Powerstage offers a sort of compromise between an FRFR and a traditional guitar amp/cab approach.
Lastly, per the options @tomfs listed, you could use a monitor from the PA or IEMs. This approach requires the absolute minimum of equipment be hauled to the gig. The drawback is that it puts a certain measure of the control over your sound in the sound engineerâs hands. You are also at the mercy of whatever PA monitors are on stage and things can sound different each time you set up. Also, if you sing, you may not like the sound of your guitar and vocals coming out of the same monitor as well as likely coming from in front of you instead of behind.
Anyway, any of these approaches is legitimate and ultimately a matter of personal preference. Good luck in discovering what works best for you.