“The Core preserves much of what made the original Expander such a useful tool”: Boss WAZA Tube Amp Expander Core review

Boss WAZA Tube Amp Expander Core: the smash-hit load box has been downsized to make it more portable but retains the look – and much of the functionality – of the original, with its black enclosure, off-white dials. Here it is pictured with amps and pedals.

What is it?

When Boss released its Tube Amp Expander under its Waza sub-brand in 2019, there was nothing else quite like it. Far from the crude technology of older load-boxes and amp attenuators, it was a true Swiss army knife, boasting every trick in the book for ‘expanding’ a tube amp.