Thread: Monitor killing the bass

check your grounding:

make sure all grounds on your car have no potential difference by hooking a multimeter up. Set the multimeter to volts, and put one end of the multimeter on sub amp's ground, for example, and the other end of the multimeter on the ground to the monitor.

You can try it on all the grounds in your car, but if the meter doesn`t say 0v then u have bad ground.

i hope this helps

Thanks for the replies. I tested the grounds and they came out ok. I then grounded the headunit, motherboard, subamp and power supply to the same spot on the car body but the problem remains!

I also tried connecting the monitor to the 12v and ground just before they connect to the power supply but the problem remained and additionally the monitor stayed on no matter whether I had the monitor power switch on or off!! Only by removing the video imput plug would the monitor turn off.

Please, please please... does anyone have any further ideas. I must have overlooked something. This is driving me crazy!

Thanks!

Quick guess, it's a lack of power problem, your car just can cope, your best bet would probably be a capactior or a second battery, have a look at the posting titled "What are capacitors for?" for more info.

If you have a sound system that is around 1000w or above then it is probably a lack of power problem, like rob suggested.

a capacitor might help, but an upreated alternator is the best solution...

if it is (still) a grounding problem, try seeing if there is any voltage between where u grounded your stuff to the cars bodywork and your batteries negative terminal... if there is any voltage difference, then just connect the two together with a thick wire...

i have everything grounded 2 my battery in my car, and never had any grounding probs

ps: one last thing, what voltage does your monitor run off, and how are you powering it?

[ 08-27-2001: Message edited by: Mike Hunt 79 ]

Haha... the subamp is only a tiny 50 watt thing running 1 10 inch speaker

The monitor power imput is DC 9-20 Volts currently running from the lighter socket.

I will try running a lead directly to the battery tomorrow!

Thanks for the help!

AndyM

heh, u dont need a capactor then

if the keypower can do the amps, try connecting the 12v out from the keypower the the monitor... good luck!

Yes!

I hooked the monitor to the keypower power supply and it works perfectly!

The only outstanding issue is that with this configuration the on/off switch has no effect. The monitor is always on when the computer is on. I can live with this... or maybe I will put a switch on the 12v line but I am curious as to why this is happening!

Many thanks Mike Hunt for your help. You are da man!

Hehe... I'm off now to play with this thing!

Thanks again

AndyM

No problem... it`s good to be of some use.

It`s also powering my monitor in the same way, but my monitor asks for strictly 12v in.

I wouldn`t worry too much about the on/off issue, you can simply use a relay to switch the monitor on and off, and they are really cheap to buy. Just do a search on google for more info, they aren`t too complicated