Luv_presea 1st Gear November 16, 2008 Share November 16, 2008 hi guys.. just installed a 4ch amp.. and after driving around, there's suddenly no sound.. HU still on and playing.. just that no sound.. after a while, sound come back again.. about few secs.. den awhile later, no sound again.. issit due to the amp getting too hot? cos when i touch the amp, its so damn hot.. ↡ Advertisement Link to post Share on other sites More sharing options...
Swiftboi Neutral Newbie November 16, 2008 Share November 16, 2008 chk yr amp fuse and other i.c.e wiring could be something loose juz tighten it or fix it bck and see Link to post Share on other sites More sharing options...
Luv_presea 1st Gear November 16, 2008 Author Share November 16, 2008 i dun think there's something loose lei. cos everytime i drive, its ok.. till about more than 30mins, then start to become like that.. Link to post Share on other sites More sharing options...
Kianbeng Clutched November 16, 2008 Share November 16, 2008 (edited) overdriven your amp? Is this a new problem recently? Or this is your newly installed amp? Edit: Oops just noted its a new amp. Probably good idea to go back to your installer. Unless it's yourself. Is it running in bridge mode? Edited November 16, 2008 by Kianbeng Link to post Share on other sites More sharing options...
Sarong1 1st Gear November 16, 2008 Share November 16, 2008 Sounds like your amp has gone into protection mode to prevent the amp from frying. Where do you house your amp? Is it under-power to effectively drive your speakers? You may be straining it. Link to post Share on other sites More sharing options...
Luv_presea 1st Gear November 16, 2008 Author Share November 16, 2008 er.. i'm not sure lei.. whats bridge mode? dun think overdriven ba.. my sub is only 300-400w.. my amp is 850w.. blaupunkt de.. HU is 70w and only got 2 6.5inch speakers and 2 tweeters.. Link to post Share on other sites More sharing options...
Luv_presea 1st Gear November 16, 2008 Author Share November 16, 2008 its right below the passenger's seat.. not sure if its under-powered though.. i know nuts.. just went to shop and they do everything for me.. shop at upp thomson area de.. Link to post Share on other sites More sharing options...
Swiftboi Neutral Newbie November 16, 2008 Share November 16, 2008 juz chk yr powerfuse supply to the amp if can't find any fault then bring bck to yr shop tat do the installation bah. Link to post Share on other sites More sharing options...
Eddy216 Neutral Newbie November 16, 2008 Share November 16, 2008 From the description you gave, the problem may lie with your amplifier trying to drive your sub at a load it is not designed for, e.g: when two channels on your amp are bridged and can only support a 4 ohm load and your sub is wired for 2 ohms, your amp needs to supply more current to pump the sub and will overheat much faster. The auto protect mode will then cut in, which explains why the sound suddenly goes off. It is good to ask your installer if the sub has a single or double voice coil. If the sub has two voice coils, is it wired for 1, 2 or a 4 ohm load? If the sub is wired for 1 or 2 ohms and your amp when bridged can only drive a 4ohm load, please either change sub or get a mono-block amp (and in the process you can screw the installer). All mono-blocks can drive 4, 2 and for some mono-blocks, 1 ohm loads. But if the sub is wired for a 4 ohm load, then either the amp is faulty or the power cable from your battery to the amp needs to be looked at. Hope the problem will be solved soon! Link to post Share on other sites More sharing options...
Kianbeng Clutched November 16, 2008 Share November 16, 2008 then I think you should go back to them..... Link to post Share on other sites More sharing options...
Kianbeng Clutched November 16, 2008 Share November 16, 2008 pls refer to Eddy216's explanation on bridge mode. Since you mentioned it's used to drive subwoofer, there might be a possibility that your installer connected the speakers in a bridge mode. If you use normal mode, the power will be halved. Or should we say, in bridge mode, the power is doubled. If the speakers + amp came from the same shop, they probably should have known this combination setup will cause the amp to operate at threshold or exceed. I suggest you don't bridge it and see if you can accept the sound. It's probably an expectation issue. Link to post Share on other sites More sharing options...
Luv_presea 1st Gear November 16, 2008 Author Share November 16, 2008 ok.. will try checking if anything wrong.. if still cant find, will go back to shop lo.. Link to post Share on other sites More sharing options...
Luv_presea 1st Gear November 16, 2008 Author Share November 16, 2008 oh! thanks for the info bro.. from what i see, i think wad u said might be true.. maybe the 2 or 4 ohm thingy.. i got a clearer picture now.. but i hope thats not the issue cos as u said have to change e sub.. btw i'm currently using bazooka basstube.. any idea its 2 ohm or 4 ohm? Link to post Share on other sites More sharing options...
Luv_presea 1st Gear November 16, 2008 Author Share November 16, 2008 the sub is not from the same shop.. actually i still dun really get the bridge mode thingy.. but from what u say, if i dun bridge it, the speakers will be powered from the hu itself? and only the sub will be drawing power from the amp? Link to post Share on other sites More sharing options...
Sarong1 1st Gear November 16, 2008 Share November 16, 2008 How is your system run in the first place? Is your HU driving your front passive component while the same RCA is being split to hook up to the 4-ch amp to drive your sub? What is the spec of your sub and sub amp? What Eddy said earlier may be very true. Express Motion did your install is it? Link to post Share on other sites More sharing options...
Eddy216 Neutral Newbie November 16, 2008 Share November 16, 2008 basstube? can i have the model number? 'cos need that to do online search to verify the specs. Link to post Share on other sites More sharing options...
Eddy216 Neutral Newbie November 16, 2008 Share November 16, 2008 As what Sarong1 said, we need to be sure of how your system is setup so that we can better isolate where the problem might be. Right now we seem to be getting more questions than answers. Link to post Share on other sites More sharing options...
Sarong1 1st Gear November 16, 2008 Share November 16, 2008 I understand Basstube is active sub...am wondering how he/installer hooked it up man...this is dangerous. ↡ Advertisement Link to post Share on other sites More sharing options...
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