a little late perhaps to add to this but for those hedging on a speed box like i was here goes.
in my system of a project rpm 9 the speed box simply overhauled the sound. huge and i mean huge difference in every single aspect of the sound. without the speed box the sound was a little jagged. i thought something was missing cos i had heard my table with a blue point evo and now have the blue point no 2 which is one step lower. i also attributed the missing involment to poor set up (this is my first table) and the condition of the lps.
however when i plugged the speed box in, the speed speeded up a little quite visually noticeable. and the sound changed. became rock solid, more assured, the instruments became more proportioned, the music seemed to envelop me now, details were more resolved compared to a fuzzier indistinct sound earlier. the music seems to bounce along at the right tempo. its just an overall feeling that the music has become more alive, more right, more 'here' in the room with you. bass has more heft and weight so do all the instruments and even vocals. more anchored sound with incidental sounds flitting in and out of the soundscape, adding to the main musical event, all in the right proportion. echoes, reverb, decay of notes were all more noticeable and clear in the music.
if you've been wondering just what a speed box does, get it right away. the improvement to my ears beat changing from a temp entry level mm cart to the sumiko blue point no 2 mc cart. at the affordable costs, there are no downsides to this purchase for me, unlike other upgrades, or additions where there are always divided opinions. this one is a no brainer. probably the only no-brainer purchase in audiophile land i've found so far.
regards
