Figaro the speaker in mine is a Jensen P12R and I don't know how much different that speaker is to the Jensen C12K. In the past I have played thru a Top Hat King Royale and a Tone King Imperial a Vox AC30HW2 and a reissue Fender 65 Twin Reverb and a reissue Fender 59 Bassman LTD. This is only my second Amp with a 1x12 the other was the Tone King. All the other Amps have had more power except the Tone King witch was 20 watts. The area I live in is a Low End Market so I would have go go on a road trip to NYC or Boston to play thru High End Amps. It's funny there are a couple of things that I do like about the Amp. The Reverb and tremolo sound great to my ears and I like the color Surf Green. Yet what's under the hood could be better and I don't think they use the same parts that they use on the Hand Wired one. Yet there is a lot of players that like the reissue Deluxe Reverb.