Long shot question but... Anyone here used an attenuator on an older Fender Champ for recording? I've Googled a bit but not found a good referral or test.
Ya wanna have some fun? Build an iso box. Put in a 8 or 10 inch weber. Unplug the internal spkr on the champ, and plug in the iso. Have the chp sitting right next to you, while the box is a distance away. Jam away hearing only what is being recorded via your monitors.
There's plenty of youtube videos on building isolation boxes.