mixing d4 and 2 subs?

[MrSwiss 10+ year member]

ok i currently own a rl- 15 d4. im going to buy another rlp15, and was looking at the classifieds in the forums and noticed alot of them are d2.

is it ok to hook these up to the same amp? could someone explain to me how to run them in unison without trouble. thanks

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[Prowler573 5,000+ posts]

ok i currently own a rl- 15 d4. im going to buy another rlp15, and was looking at the classifieds in the forums and noticed alot of them are d2.
is it ok to hook these up to the same amp? could someone explain to me how to run them in unison without trouble. thanks

You can do it if the overall impedence load with them wired together is acceptable to the amp driving them.

Just be aware that the subs will not see the same power level. Whichever has a lower independant resistance than the other will receive more of the amp's output than the other driver will.

 

[trow100 10+ year member]

Dont do it.

 

[squeak9798 5,000+ posts]

Physically it will work....i.e. nothing will catch on fire or be damaged. However, as prowler mentioned, the subwoofers will recieve different power levels, which is not a good thing and will affect performance. So no, it's not a good idea to do it.

 

[MrSwiss 10+ year member]

yah thats what i dont want to do. my rlp is bridged at 4ohms i believe right now, and i could bridge the other to the same power lvl, or that is what would cause problems? =/

 

[Prowler573 5,000+ posts]

If the RL-p you already have is a Dual 4 driver then it physically cannot be wired to a 4 Ohms nominal load by itself. It can be wired to either 2 or 8 Ohms (wired parallel or series, respectively) unless you are driving each coil independently from one another thereby having two separate 4 Ohm loads.

 

[MrSwiss 10+ year member]

well right now it is wired to 8ohms but is bridged wouldnt that equate to 4 ohms

 

[squeak9798 5,000+ posts]

yah thats what i dont want to do. my rlp is bridged at 4ohms i believe right now, and i could bridge the other to the same power lvl, or that is what would cause problems? =/

Not really sure what you mean. If you bought another sub identical to the one you have, the final impedance will be cut in half if you wire them in parallel or double if you wire them in series. I'm guessing you're amp is not 2ohm bridged stable, so you can not buy another sub identical to what you have and wire them in parallel together. And if you wired them in series, the amp would be running at 8ohms, which means the total power output would be 1/2 of what you're currently running....which would mean that each sub would be receiving 1/4 of the power your single sub is presently receiving.

 

[squeak9798 5,000+ posts]

well right now it is wired to 8ohms but is bridged wouldnt that equate to 4 ohms

No. If you wired the subwoofer to 8ohms, then the amplifier is seeing an 8ohm load.

Each individual channel would see half the load since the amp is bridged, hence each channel would "see" a 4ohm load. But that's not really relevant to anything and not something you should really concern yourself with. The amplifier as a whole sees the full 8ohms, and you are running the amplifier at 8ohms bridged

 

[Prowler573 5,000+ posts]

well right now it is wired to 8ohms but is bridged wouldnt that equate to 4 ohms

I don't understand exactly what you are asking here...

You do not bridge a sub...you bridge two channels of an amp into a single, mono channel.

What exactly has been done to the sub to make you call it being bridged?

Edit: If Squeak is right and what has been bridged is the amplifier (as mentioned above about combining two stereo outputs channels into a single mono channel) then Squeak is further correct is stating that the amplifier you are using is seeing an 8 Ohm load (and as a result is only driving the sub with approximately half of its rated 4 Ohm mono bridged output rating.)

 

[squeak9798 5,000+ posts]

I don't understand exactly what you are asking here...You do not bridge a sub...you bridge two channels of an amp into a single, mono channel.

What exactly has been done to the sub to make you call it being bridged?

I think he's confusing the fact that each channel "sees" half the load with the idea that this means his amplifier is running into a 4ohm load. Which obviously is incorrect.

 

[Prowler573 5,000+ posts]

I think he's confusing the fact that each channel "sees" half the load with the idea that this means his amplifier is running into a 4ohm load. Which obviously is incorrect.

I figured that out after reading your post prior to the one I've quoted.

Hence the edit in my post //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[squeak9798 5,000+ posts]

I figured that out after reading your post prior to the one I've quoted.Hence the edit in my post //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

That section of my post was editted in aswell, so I wasn't sure if you had seen it or not //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[MrSwiss 10+ year member]

oh boy @_@ i guess im at 8ohms which is a good thing, meaning i have plenty of juice for another rlp.

 

[Shortbuskid 10+ year member]

I ran two different subs for awhile, each in their own box off the same amp...sounded fine, amp always ran a bit warm, probably because I was running it below 4ohms.

Eh why not just wire the Rlps down to 1ohm, give them some room, and port them. 3 15's is awesomely rediculous though. hell 2 is. BTw what amp are you running