What is the amp power, 150W?I hoped someone would have made it available for free like for other Mazda models but I guess it's too early.
What I am looking for right now is the wiring diagrams to find a suitable power hook up (except directly at the battery) for my Bose active subwoofer project.
From memory from my university days, most sound systems run what is essentially a constant voltage setup at the speaker side of the equation, usually in the order of between 70 to 100 volts. This different to the power feed to the amp which will have a different power rating. Assuming the higher number and using a derivation of the standard power calculation of P=(volts) V x (current) I, the current flow assuming 100 watts output peak means the current would peak at around 1 amp at the speakers. Using the standard cable size versus current table in AS3000 (Australian Electrical Standard) then 0.75mm2 cable would work fine and still meet the voltage drop allowance.100W + 0,5mm2 +3 m cable lengt = smoke.
With 5 % voltage loss 2,5 mm2 is minimum.
You don't gain any profit with bigger amplifier power if big portion of the voltage gets lost in the way.
Atlest I was talking about amplifier power feed wire.. Assuming the higher number and using a derivation of the standard power calculation of P=(volts) V x (current) I, the current flow assuming 100 watts output peak means the current would peak at around 1 amp at the speakers.Happy to be corrected if I am wrong though.
Atleast I was talking about amplifier power feed wire.. Assuming the higher number and using a derivation of the standard power calculation of P=(volts) V x (current) I, the current flow assuming 100 watts output peak means the current would peak at around 1 amp at the speakers.Happy to be corrected if I am wrong though.
Point taken - apologiesAtleast I was talking about amplifier power feed wire.
Current between battery and amplifier is totally different than current between amplifier and speakers.
P = U x I -> I = P / U ->
100 w / 12 V = 8,33 A.
Hi h3rb3rt,100W and I am sure this is peak. The power wire of the active Bose subwoofer harness is 0,5-0,75 mm² at best. I don't see a reason going larger than this. I was thinking about picking up power at the OEM amplifier under the RH seat.