Good evening hywelg, Mitch,
To tell the truth I never tried any Klein/dumbleator to compare to my other loop processors. One thing I know for sure if one uses proper bypass switch (because “bypass” on the rack devices IS NOT A REAL bypass, signal still goes through the digital chain) like this
This is a simple, double pole switch which disconnects FX’s IN and OUT contacts and reconnects amps SEND – RETURN poles. So you can hear unaffected signal from the amp.
With this you can fine tune and match amps real volume, tone without and with FX unit. I use short (40 cm) RF leads (one’s ground wire is disconnected from the jack’s ground pole to avoid ground loop hum) and use G majors EQ for frequency compensation if I need to or shape the tone for each patch differently.
I will soon try my friend’s dumbleator made by Brandon Montgomery (Bludotone amps) to compare if it works better in the loop.
Mitch sorry I did not reply on your old post in Russian. Being GEORGIAN I try not to show my knowledge of “enemy” language, especially now
Cheers