![]() ![]() Hope this helps and it appears I need to update our setup articles on this topic for greater detail. ![]() Sqrt(1^2+1^2) = 1.41 times the original signal orĢ0*log(1.41) = 3dB voltage gain or 1.5dB of power gain based on 10*log. Just buy these excellently-constructed Y-splitters from Monster at 15 a pair. The equivalent output for summing two non correlated audio sources is: When you sum two Non Correlated audio sources (IE. The manual says that i just need to connect a single cable from sub to the left in, but from various forum posts (on avforums & others) iv heard someone people saying they get better bass by using a single RCA -> 2 RCA (Y split) cable. Thus you get 20*log(2) = 6dB gain in voltage for power it would be 10log(2) or 3dB 1 My Sony DG820 has a single sub out, but my Mordaunt Short 9 (the sub) has the option of a left & right in. You get: A1 + A2 (where A1=A2) = 2A1 or twice the signal level When you sum two correlated audio sources: (IE. I am not sure why they don't do that with sub amps? volume controls).Īs a side note, when I used to design audio interfaces, I usually added an attenuator after the mixing stage to eliminate the added gain. In reality, your only upping the input level, while keeping all other things constant (IE. I usually recommend using a ysplitter in the case where your preamp sub out has weak signal levels (really not the case anymore). However, this also brings you 6dB closer to clipping the sub preamp and 3dB closer to reaching the dynamic output limits of the subwoofer. This can yield a 3dB increase in output level, all things being equal. You will actually get up to 6dB of voltage gain depending on how the summing is done (assuming no limiters or active gain control circuits are present). Just to clarify here, what you are actually getting on most subs by using a y-cable to feed the L/R inputs is input signal gain since each input is being summed before going to the power amp. ![]()
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