Originally Posted by mattg43
The thing that would worry me, is how you set the gains.
If you did the traditional method of a test tone, 3/4 volume, and a DMM (which is sounds like), then you set it up to only put out the max power when you meet those conditions - in when listening to music, unless you are rocking a full tilt, you dont get close to that.
The difference in 225w and 350w is not that great - to the point that I dont think its worth spending the cash for, unless you want to.
I would personally grab a pretty dynamic track, crank it to your max listening volume, and adjust the gain by ear.
Another trick, if you have a DMM that remembers max or peak, play that dynamic track and crank it, see what your amp is actually putting out, and adjust from there.
Then, if you think you want a little more, look into new amps.
As usual, we're going further into this then I thought, so I hadn't added huge amounts of detail, but we're here now
Yes, I set the gains to 225W's of voltage via a 50Hz test tone at 3/4 volume with all equalization settings to flat. I then check the sound by ear and by the JL Audio IPad RTA, usually adding a couple of db equalization at the high and low end. When cranking a track, a bit below the volume setting used for the gain max, the RTA starts spitting out "clipping detected". Now, my ear is not tuned well enough to pull the beginnings of clipping from the sound, so I go by the RTA. Might be my first failing....
Given this, I was wanting a bit of headroom to stay away from clipping, not to make it louder, but I do want the 225W's worth of power as that seems to be needed to properly balance the sound, as least for me anyway.
I can make it sufficiently loud with the RF amp, but I want to use the Arc10 to it's fullest without also worrying that my 16 yo son will feel his oats one night and "over-clip" it. My other option for the 16yo problem is to down-gain the sub channels on the RF, but that makes the sound so flat that it's just boring.
Also class D vs. class AB has some benefits.
BTW, I actually had the gains set up higher then the DMM max, and that gives me a good balance between sub and the rest, until I crank it up, then the sound starts to get ugly too early, I assume since I am clipping.
Just haven't been able to find the happy medium between the sub and the Focals without overdriving the sub channel.
One last thing, when I tune the gains by ear for a cranked track, I can get it set well for ear-bleeding territory, but then the sound just goes flat at low volume. Am I asking too much to get a setting that sounds reasonable over high and low volume settings?
Sounds like I'm thread jacking myself......