I bought one for my MMF-7 and can recommend it. What it does is correct the sine wave of the AC, in turn allowing the motor to run at a more precise speed. The actual effect, that I noticed, is better PRaT. I now have some 45 RPM LPs and not having to move the belt is great.
pro-ject speed box 2 , all they say it is ?
i recently purchased a new pro-ject perspective 2 carbon. so far im really loving it. ive read a few reviews saying the speed box makes a great improvement to the sound of the pro-ject tables , though on paper i dont see how it would. ive got pretty clean power, i dont own any 45,s and i like a less cluttered system. and that little silver box would stick out like a sore thumb. but if a 120.00 gadget really does improve the sound that much ill do it. anybody thats tried it please advise, thanks