12v pwn motor controller as fan controller?

[fastboy]

so i saw these on ebay,12v 5 amp pwm motor controllers and thought..hmmm..cheap fan controllers,maybe ideal for hooking multi fans upto 1.

what you guys think any good?

http://www.ebay.co.uk/itm/10A-DC-12V-24V-36V-25Khz-DC-Motor-Speed-PWM-Control-Controller-Driver-Adjuster/400759346612?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D29974%26meid%3D079face40e9344c6958ba0c0c89c9598%26pid%3D100005%26rk%3D1%26rkt%3D6%26sd%3D251981962071&rt=nc

http://www.ebay.co.uk/itm/10A-12V-40V-PWM-DC-Motor-Speed-Control-Switch-Controller-Volt-Regulator-Dimmer/121250426718?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D29974%26meid%3D079face40e9344c6958ba0c0c89c9598%26pid%3D100005%26rk%3D3%26rkt%3D6%26mehot%3Dag%26sd%3D251981962071&rt=nc

 

[fastboy]

i was just going to connect 4-5 case fans to one of them so tach isnt really important i guess.