So I'm getting a set of Sundown SA-8v2 D2's in tomorrow so today I wanted to check what kind of AC voltage the sub channel on my amp would push out to make sure I could get the amount of wattage to the subs that I want.
My amp is an Audison LrX 5.1K and is listed at 1150W @2ohms on the tech sheet. So I used the equation sqrt(watts x ohms) to find that I needed to see 47.95v on the DMM to be aprox. 1150W.
I will explain my current setup a bit to give a little more info on this.
I'm running a Kenwood DDX419 Head unit (4v Preout), but I'm not running my speakers off the amp so I can only turn up the HU to about 15-20/35 to get to my max listening volume so would definitely not be putting out 4v from the preout. I am also running a Cache Line Driver to help boost the voltage a bit but still definitely needs a lot of extra gain to hit the proper voltage. So now when I go on with this story you will know why my gain is going so high haha.
So anyways with no speaker hooked to the sub terminal on the amp I ran a 60hz test tone at volume 17/35 and managed to hit the 47.9v (1150W) at about 3/4 gain. Now onto my final question.
I'm pretty sure this amp is underrated on the sub channel because I was able to get 66.6v(number of the beast haha) before the amp went into protection. Now what I want to know is if it would be safe to go higher than the 47.9v or will that most likely be clipping the amp? Or is there no real way to tell without actually putting a load on the amp and using a scope or something like the SMD Distortion Detector?
And actually with a proper 2ohm load on the amp will it require more gain to hit the RMS voltage or less gain? I'm not sure how the resistance will affect the AC Voltage. How much resistance is going to the amp with no speaker attached? Zero Ohms?