Bit of an update : Took my Spark Cab to band practice and it sounded great with my AxeFX III . I had tweek the global EQ on the output of the AxeFX to tame down some of the bass. To my ears it sound more like a guitar cabinet then the Yamaha FRFR speaker I usually use. It think it is the difference between a plastic/metal cabinet of the Yamaha and the Wood from the Spark Cab. --- yeah thats it FRFR TONE WOOD !!!!! - Next Level Tone wood debate to follow
For what its worth when you turn up the cab - the white/brown noise gets drowned out .
also I am on a few Spark Facebook groups and about 98% say they hear the white/brown noise and about 20% have other issues with the cab.
There was one or two guys that INSIST that there cab is dead quite - no hiss ... Kinda full to see the others in the group question his hearing and saying he has the "Unicorn" Spark Cab.