My experience with the Speed Box was a little less.... enthusiastic than a few reviews I have read; the improvements I noticed were pretty minimal, if at all. I listen to a lot of punk rock, and have a ever-growing collection of 7" singles, and even a fancy audiophile 45RPM issue or two. I got the Speed Box purely to change speed (and to add another box into my system
), any sound improvement was just a bonus. I also can't say that I really noticed any sonic differences with the TT mat. I did however, hear a significant change/improvement when swapping out cartridges.
FWIW, I have a rather "noisy" listening environment; I'm in a small apartment and am just a short, mostly unobstructed distance from my dishwasher, aquarium, AC unit, and laundry stack. Were I in a dedicated/treated room, I may have had different thoughts on the sonics after adding the mat and other "tweaks" I have added to my system.
I do have one odd gripe with my Speed Box. As mentioned before, I do still have issues with static. My apartment gets rather dry in the winter, and it seems like I can hear pops and shocks just about every time I use my TT. On occasion, when the static hits the table, my Speed Box will change speeds. Also, sometimes if I remove a static-heavy record with the SB off, the current sent through the TT will turn it on. Although this is not a huge deal (really just an annoyance), it is still slightly frustrating that I shelled out $160 for a feature that the majority of TT's have standard. Taking that into account, I feel as though the device should behave perfectly every time without issue, and I can't say that is the case. I haven't heard any chatter on the internet regarding other owners with similar problems, but I also haven't really looked. I guess I'm kind of just ranting here................
If the Speed Box gets updated with the new S series boxes, I may upgrade. I have been eyeing the new Pro-Ject phono pre-amps, and I would love to have my Pro-Ject boxes be from the same series
hopefully the static effects will be corrected if the device gets updated, although I'm not holding my breath.