protech have engage the  car accessories many years, we design and manufacture the accessories like audio products, car ware products, for near year we must follow the trend developed and manufactured the video products.

Okay, for the speaker and stereo ,cd player... audio products,  protech have the good design and pay the most impotant attention and energy in good sound,  it is must be a good sound speaker ,subwoofer,and player could care the customer needs.

for  we are supply to the wholesalers for foriegn countries, and retailers .   all the client is need to
care their customer in qulity , not a trader just earn money.

we have brand in china, so must a  good service in oversea market.

Normally, It is have three size , we have example of three tyle of car speaker system for your reference:
driver size  12" 10" 8"
voice coil diameter 50mm 40mm 35mm
freqence     30hz-250hz   35hz-250hz   45hz-25hz
rateion power 200w-240w  150w-300w   100w-200w
music power  1600w 1200w 800w
power source  11v-16v  11v-16v 11v-16v
ground negative negative negative
power consumption 13A 13A 13A
autofuse  13A 20A*1 20A*1
packaging detail fue 1pc fue 1pc fue 1pc
             iron bar 2pc iron bar 2pc 
                           used manual used manual