Bridging an amp... ?HELP? im retarded

[Forty-Ouncer 10+ year member]

ok my RF 300S amp manual says that the amp puts out the follwing...

75rmsx2 @4ohm

150rmsx2 @2ohm

300rmsx1 @4ohm(mono) bridged

right now i have my 2 10" subs (SVC) wired up to each channel, therefore getting 75rms each. How could i take advantage of the 300rmsx1 @4ohm(mono)?? if i wire them up this way does that then mean that i will get 150rms to each sub? do i have to wire my subs together and then to the amp?

if anyone has any idea whats going on here please fill me in.

Click to read more...

 

[kingpin_jeffie 10+ year member]

I take it the subs arent DVC?

So unless you get new subs your hosed

 

[lynchmob723 10+ year member]

cant you use the two SVC's and make the amp think there One? hook the subs in parallel and "bridge" it at the amp (1 + and 1 - connection at amp)...it makes sense...assuming your SVC is 4ohms..together they will make 2 ohms...and your amp pushes 150watts @ 2ohms. think of a DVC sub as two SVC subs....and 2 DVC subs could be 4 SVC subs.. So yea i think you could get 150watts to each sub with that amp...I dont know maybe im thinking of it all wrong. Correct me if i am wrong please cause id be curious to why this wouldnt work

 

[tommyk90 5,000+ posts]

I take it the subs arent DVC?
So unless you get new subs your hosed

What he said. Since your subs are SVC (4 ohm i presume) you can't bridge the amp because the ohm load will be too low. The only option you have for using the bridge channel is the wire the subs in series which will produce a 8 ohm bridged load, and get the same kind of power you have now. The only way to be able to bridge the amp and have it run at a safe ohm load is to get either: 2 SVC 2 ohm subs or 2 DVC 4 ohm subs.

Actually, now that i think about it, my friend has that amp running his HE2, which is DVC 4 ohm. So he has his running at 2 ohms bridged and hasn't had a problem yet. It's NOT recommended, but i guess you can just hook both subs up to the bridged channel and see what happens. More than likely you could fry the amp, so i wouldn't take the risk.

 

[tommyk90 5,000+ posts]

A lot of n00bs will run one voice coil per voice coil ...

?

10 characters

 

[tommyk90 5,000+ posts]

Hehe, oops ...
I meant to say either one channel per voice coil or one voice coil per channel

Yeah, thats not a smart thing to do either though.

 

[lynchmob723 10+ year member]

why is that not a smart thing to do? seems fine to me. each voice coil will split the watts up evenly, it has to work that way

 

[tommyk90 5,000+ posts]

why is that not a smart thing to do? seems fine to me. each voice coil will split the watts up evenly, it has to work that way

Because it is very difficult to get each channel to put out the same EXACT power to each coil. That is why we don't recommend it.

 

[lynchmob723 10+ year member]

Hmm k i see where your going. But Technically, It should split it evenly since the loads are supposedly identical dont ya think? Because the load is what determines the current drop which then determines all your other factors (watts, etc)

 

[tommyk90 5,000+ posts]

Hmm k i see where your going. But Technically, It should split it evenly since the loads are supposedly identical dont ya think? Because the load is what determines the current drop which then determines all your other factors (watts, etc)

Yeah, technically your right. But what also determines the output is the gains on the amp. If the gains are not EXACTLY the same, the wattage sent to each separate sub will be differenct. Even if there is only one gain for both channels, most likely they are not going to receive the same exact power.

 

[lynchmob723 10+ year member]

ok..so lets say this occurs...what could happen?