There was a problem with the Celestion speaker, so the seller sent me an old Eminence that he had around. It's unamed, but has a huge magnet and I found a description that lists it as a 100 watt speaker. The amp is now really loud, so it must have greater sensitivity than the Celestion. It also now feels like it weighs half again as much as it did! It really has a big, open sound - perhaps due in part to the open back in comparison with the Vox? It's a different beast in many ways, but I love the sound and the feel of this amp. I would think that you could easily play a smaller gig with this amp.