amp and subwoofer affects performance?

[mperez]

Hey all,

After installing a sony amp and a subwoofer, I noticed my saxo performance decreased and after I reach about 60mph whe wheel starts to shake a bit, something that never happend to my car....also it takes longer the accelerate than before...

any ideas?
thanks!

[mperez]

how big and heavy is the sub, i know its obvious lol but the heavier the load...

other than that, could just be coincedence

hey there thx for replying, its a sony 12" and sony amp 554ZR

[GroomGTI]

You minght just need your wheels balancing, may have nothing to do with your sub + amp

[marc_safc]

it shouldnt really make no difference mate as said before its a bit heavier so will be a little bit slower but not noticable.... think it may just be a couincedence that the problem has happend when uve fitted your sub n amp....

[Joesnow]

I’m not a pro on this but I’m pretty sure it won’t be far offI’m 100% sure it will slow your car down though...:geek:.


To power a 1KW sub assuming the alternators 60% efficient, the amps 40% efficient and the sub wiring and amp have a mass of 50kg (just wild guesses at those figures):

The amp will need 2500W electrical. Therefore the alternator will need approx 4170W mechanical from the engine…

4170W = 5.6bhp


Stock VTS – 120bhp, 935kg, 128bhp/tonne:y:

MaxPower VTS with 1000W sub – 114.4bhp, 985kgs, 116bhp/tonne:n:



Have a look on GMCs website they sell a freepower unit that stops your alternator charging on full throttle…

The shaking of the wheel won’t be related to the amp and sub

[Coonper]

Cant see that being true tbh mate
At least not to that extent anyway!

[pjsaunders06]

I’m not a pro on this but I’m pretty sure it won’t be far offI’m 100% sure it will slow your car down though...:geek:.


To power a 1KW sub assuming the alternators 60% efficient, the amps 40% efficient and the sub wiring and amp have a mass of 50kg (just wild guesses at those figures):

The amp will need 2500W electrical. Therefore the alternator will need approx 4170W mechanical from the engine…

4170W = 5.6bhp


Stock VTS – 120bhp, 935kg, 128bhp/tonne:y:

MaxPower VTS with 1000W sub – 114.4bhp, 985kgs, 116bhp/tonne:n:



Have a look on GMCs website they sell a freepower unit that stops your alternator charging on full throttle…

The shaking of the wheel won’t be related to the amp and sub

are they any good mate, all i have in my car is stereo and 4 speakers would it make sense to buy one or not

[Marcos]

I’m not a pro on this but I’m pretty sure it won’t be far offI’m 100% sure it will slow your car down though...:geek:.


To power a 1KW sub assuming the alternators 60% efficient, the amps 40% efficient and the sub wiring and amp have a mass of 50kg (just wild guesses at those figures):

The amp will need 2500W electrical. Therefore the alternator will need approx 4170W mechanical from the engine…

4170W = 5.6bhp


Stock VTS – 120bhp, 935kg, 128bhp/tonne:y:

MaxPower VTS with 1000W sub – 114.4bhp, 985kgs, 116bhp/tonne:n:



Have a look on GMCs website they sell a freepower unit that stops your alternator charging on full throttle…

The shaking of the wheel won’t be related to the amp and sub

sounds abit overrated that for me you would lose a lil bit because of weight of sub but not that much, it dosnt explain the shakin

[Joesnow]

Maybe it’s a bit overrated. I’m not sure on efficiency of the amps… I’ve seen people with 250amp fuses! That would suggest the amps need loads of power – 3000W. I know they give off loads of heat so they won’t be that efficient…

The power doesn’t just come from nowhere! Everything electrical drains power from the engine and increases fuel consumption…