Recommended amp for 1 or 2 Dayton RSS390's? - AVS Forum
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post #1 of 4 Old 07-19-2012, 12:24 AM - Thread Starter
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In my previous thread, I was looking for filler subs for my IB system, 1-2 subs to cover the 40hz-100hz freq range for the rear of my room. It was recommended that I look at the Dayton RSS390HF drivers but I'm not sure what amp to pick up. I'm also told that when using filler subs, phase control is almost mandatory so an amp with that option would be best.

Also, if I'm not digging much below 40hz, do I need the 15" driver or would the 12" option suffice?

Just one last note, this is also a bit of a trial and error so I do have a light budget. I'm not sure that larger subs will cure my issues at a couple of target frequencies but my 8" folded horn helped a bit and was hoping that 1 or 2 larger subs would be more help.

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post #2 of 4 Old 07-19-2012, 04:10 PM
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There is the iNuke series from Behringer which some models have a DSP. Is it possible to add ported subs with an infinite baffle? or will there be problems? I was going to suggest a ported pro driver which should hit hard from 40-100hz.

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post #3 of 4 Old 07-19-2012, 05:50 PM - Thread Starter
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Idk, I was planning on sealed anyway. I also found out that I can use something like a Element Designs eq.2 for phase control of the filler subs. This will also allow me to run my main IB's and filler subs off of my EP4000. Should work, you think?
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post #4 of 4 Old 07-21-2012, 04:17 AM
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I have never seen comments on the question if the gain of the sub amps needs to be the same as the mains and the relationship to the driver efficiency.
Does this mean the perfect amp is one with the same gain as the main?

Let's pretend the sub and main have the same efficiency. They won't, but let's start there.
Main amp is small, it has a gain of 23, Sub amp is big. It has a gain of 29. Both are typical gains for amps, though around 26 is "normal"
You adjust both inputs so that at 1 volt in, you get the same power measured.
Now put 2 volts in. Because volume controls adjust level, not gain, you get four times the voltage applied to the sub as you do the main.
Throw in driver efficiencies, and it gets ugly.

BTW, I found the cheap O-Audio plates to work quite well compared to others I have used. I have to admit, two of my systems have a Parasound
and a Hafler traditional power amps powering them.
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