I looked on the Canary Audio page, and the 300B push/pull amps have an input sensitivity of only 0.72 volts to reach full volume. Looks like the pre-amps have 9dB gain. So...there's the problem. Post your hometown and see if someone has some nice Bottlehead or other diy gear with some good Pi 4's you can listen to... You might make a transition many of us have already made!