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Originally Posted by amit1101 hello navin and all bhp brothers
i m making my own car amp. will 70rms into 2 do 4 coax
140rms bridge for sub |
coax speakers tend to be more sensitive than components becuase their crossover is so simple the insertion loss (due to a more complex crossover) is not there.
1. in a car 40W rms/ch is more than enough for most front and rear speakers
2. for a sub you need to swing more volts and depending on the sub's T/S specs you may need even 500W
I built a car amp about 20 years ago that puts out about 35W rms x 4 at < 0.1% distortion, a bit more than 40W at clipping.
when testing your car amp i'd suggest using the following test load - 1mh 12SWG inductor in series with a 4 ohm/25W resistor. If you cant find a 4ohm/25W resistor use 2 x 10W/10ohms in parallel, 3 or 4 10W resistors if you want to stress test the amp.