It’s a tall order properly driving stonking great come-and-have-a-go if you think your hard-enough type speakers (B&W 801D). However, the supreme A370 on bass duties (John even biasing sonic delivery to favour lower registers) now weighs a gazillion tonnes and gives truly heroic performance (and I’d imagine is edging into crazy SA470 territory). I dread to think how much current it now chucks out. And the (wholly underrated) P270 (on mid/tweeter) has become barely lift-able, is as smooth as hell, and matches, or betters, the A370 pre-upgrade. The downside is that there’s now a black hole in my listening room with its own gravitational field.
A difficult, complex job, completed with passion and skill – bigger transformers, internals rewired, high-end Mundorf caps throughout, WBT connectors … and I’d imagine a whole heap more too. John also added two sub-woofer outs as part of a heavy MVT pre-amp modification (where I can now take the bass into the stratosphere). Its sounds beautiful and lovely, I grin from ear to ear listening to this rig. I’m getting on a bit but it’s never too late to be astonished and amazed.
And one of the nicest things about JS Audio is the banter you can have with John himself. He knows his onions all right but, more than that, he is a true quintessential gentleman, with your best interests always at heart.
Heartily recommended. Superb and a profound transformation. Thank you, thank you.