Been wanting to try this for some time now. A PreBS 15+ with 15″ speaker. Turned out better than I imagined! The oversized Mercury Magnetics transformers combined with the larger cabinet and 15″ speaker is a perfect combination! More volume, more headroom, and more harmonic overtones when pushed, especially with the feedback knob cranked. It’s just hard to imagine a senario where this amp wouldn’t excell. Use 6V6(18W) or 6L6(36W) power tubes to dial it in for your particular volume and tone preferences. Right at home with blues, country, surf, jazz, rock, and ? Portable powerful perfect tone!