We recently built a pair of Dumble ODS amps, and quickly realized that we were going to need a decent effects loop buffer if we wanted to add some reverb. The Kleinulator is a perfect tool for this. If you have an amp with preamp out/power amp in jacks, and no effects loop, this loop buffer can help you insert your effects into the amp's signal path, and allow you to precisely blend them in to your amps tone. Especially cool if your amp has no reverb, you can now add the reverb of your choice. Just a handy amp tool.