my friend got one of these used for $10 (sells at rhe source for $60) and i decided to try it and it said my car (2010 elantra wagon) does a 125.3 off music, now i dont know how accurate this thing is or im just expecting too much from my little system (10" clarion ssw1000 running off a jbl gto7001 amp, sub is at 2 ohms box is 1.14 cf tuned to 35hz)

 

they are not accurate at all. if you are willing to drive to etobicoke, i have a termlab if you would like to meter your ride

 

You get what you pay for man.

 

im in bathurst and Lawrence if u wanna get metered