Setting up my system and I’d just like some feedback if I’m doing it right:

RG GTS HU with RF flash
GZ YB neo up front
Diamond Audio 2 channel HXM amp

I set amp to full pass, HU 3 notches from full volume and all eq flat, 1000khz -5db test tone, Oscope to 28 volts bike running. Then I switched to HP and started around 130hz and started working my way down tuning it. Left it at around 120hz because I wanted to be safe. Went for a ride and felt like I could go lower with my eq. In the garage with the bike running I lowered the eq and started getting low frequency distortion around 100hz with volume down 3 clicks from full. I raised the eq a bit till there was no distortion on that track.

Am I doing this right? Should I leave the gain and eq where’s its at now or lower the gain so I can lower the eq?

 

I'm not 100% on the HU clipping level (from what I have read over the years it's 3 bars below fill volume) but I will tell you the GZ's can easily take the 28v (198w) you are feeding them at 80hz.

 

yes and I confirmed it by pulling up the bin, it was 08_off.bin.

 

Here is the manual for the hxm800.2. Here’s where maybe I messed up. I found the median between 40 and 400 hz and that’s 220. I assume that would be at the 12 o’clock position. The median between 40 and 220 is 130hz, which I assume is at the about 9:30 position. The median between 40 and 130hz is 85, the 8:30 position. I was shooting it be closer to the 8:30 position but ended up closer to the 9:30 position.

are my calculations correct?

 

Yea seems accurate to me...but even at 85hz, with 28v, they should not be distorting.

What if you play them at 4 notches down from full at 85hz? Does it sound fine? And if so, when you click that one extra notch up, does it distort? If so, I would try resetting gains @ 4 notches down from full and see if issue returns.

 

that’s a good idea, I’ll try it. I’ve run ferrite gz’s before and the neos are supposed to be drop ins but I put some sound deadening mat in the pod and I wonder if what I was hearing was vibration in the pod due the the speaker touching the pod.

 

Hmmm, didn't know GZ had come out with some neo magnet yellow baskets. I don't know if the power handling is similar to the originals or not, but I've always run 150 watts to mine and have the Rockford flash on my GTS head unit and have not experienced any distortion at all.

 

My opinion is you did everything right. And I would probably keep the HP at 120 if you're pushing 200 Watts. Don't forget those pots can't be that accurate at 8:30 or 9:30 or 10:30. If you hear Distortion that's what you go by. What might be 100hz at 9:00 on one amp could be 120hz at 9:00 on the same model but different app. Sometimes you just have to use your ears

 

Unless you have a way to correctly set the crossovers on the amp like a CC-1 you are just guessing at the frequency you are setting the crossovers at.

The pots they use on the amps vary from piece to piece within X % of tolerance. So setting them the way you described, maybe at 50hz or 120hz in one position or another.

 

Used to be cheaper.