highhighs Posted December 31, 2004 Report Share Posted December 31, 2004 if i want to take the all the power of a 4 channel amp to a sub. so suppose i have the amp in 2 channle bridged mode. can i know connect the + of the two channels together and same for the (-) to have same voltage but double the power at 4ohms? using simple theory i canot see why not. i have 2 sources at say 12v each and too loops of current so i have say 8.3(assuming 100w) in each loop flowing in the same direction so i should get double the power in the sub. but does this cause problems to the amp circuitry or maybe heat problems? Link to comment Share on other sites More sharing options...
Veneficus Posted December 31, 2004 Report Share Posted December 31, 2004 I would have to say do not do this. If your amp is not setup to bridge all 4 channels into one do not force it to do so... you'd be much better off getting a 2 channel or mono amp to power your sub with... I know its going to cost you a bit more but whats more important... having two amps or none at all? Link to comment Share on other sites More sharing options...
theunderlord Posted December 31, 2004 Report Share Posted December 31, 2004 if i want to take the all the power of a 4 channel amp to a sub. so suppose i have the amp in 2 channle bridged mode. can i know connect the + of the two channels together and same for the (-) to have same voltage but double the power at 4ohms? using simple theory i canot see why not. i have 2 sources at say 12v each and too loops of current so i have say 8.3(assuming 100w) in each loop flowing in the same direction so i should get double the power in the sub. but does this cause problems to the amp circuitry or maybe heat problems?←I'm with Brian. Get yourself a class D monoblock sub amp. Don't F around with wiring. Link to comment Share on other sites More sharing options...
highhighs Posted December 31, 2004 Author Report Share Posted December 31, 2004 i got this for christmass and dont have the money to buy another but hey its sounds good normally bridges .thank you. Link to comment Share on other sites More sharing options...
bogelo Posted January 1, 2005 Report Share Posted January 1, 2005 if i want to take the all the power of a 4 channel amp to a sub. so suppose i have the amp in 2 channle bridged mode. can i know connect the + of the two channels together and same for the (-) to have same voltage but double the power at 4ohms? using simple theory i canot see why not. i have 2 sources at say 12v each and too loops of current so i have say 8.3(assuming 100w) in each loop flowing in the same direction so i should get double the power in the sub. but does this cause problems to the amp circuitry or maybe heat problems?←Almost all good 4-ch amps class AB circuitry can be bridged into 2-ch, rarely 1-ch (but you have to make sure they are bridgeable). You have to find out yourself by reading your amp' manual. This is not a problem as long as you get a good amp and your sub' RMS wattage match your amp' RMS wattage. Link to comment Share on other sites More sharing options...
Guest Guest Posted January 1, 2005 Report Share Posted January 1, 2005 it is bridgable into 2 channles but not into 1 channel i was thinking i could manually bridge them into 1 but i guess not. (anybody care to explain why? just for the knowledge).thnak you. Link to comment Share on other sites More sharing options...
wattsat Posted January 2, 2005 Report Share Posted January 2, 2005 Why don't you buy a 2ohm Dual Voice Coil Sub?Bridge the 4 Channel amp into two channels.Run a Mono Signal to the amp.That will put the full power of the amp to a single sub.What would be even better would be to buy a 2ohm Single Voice coil sub. Run two channels in bridge mode to the sub and then 2 Channels at 4ohm to a good pair of front speakers. That is a very good setup.I don't think I have every seen a 4 channel amp that would run as a single channel. Not saying it can't be done, I just have never seen it done.Then again, my Xtant 202m says not to run it in Bridged mode @ 2ohms but it has done it flawlessly for 4 years and most of that time had no ventillation. Link to comment Share on other sites More sharing options...
highhighs Posted January 2, 2005 Author Report Share Posted January 2, 2005 i was reading some stuff and i noticed that im not really bridging them since bredging involves inverting one of the channels and adding it to the otehr to have say double the voltage drop. what im doing is not inverting one of the channels im like adding 2 power sources in parallel to the circuit so i have same voltage drop but double the current. but i guess that doubeling the current => qudruple the power at the same load which the amp can't handel so i guess this is the reason why it cant be done.EDIT: i guess it is not done since it is useless after thinking it on paper having two voltage sources in parallel will keep the same current through the load since I=V/R but the current drawen from each source would be half so the power at the load stays the same. got my answer. Link to comment Share on other sites More sharing options...
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