X-post from DIYMA
Thank you in advance for any help here!
Set up will be:
2021 GMC Sierra Sierra AT4
Helix P6 Amp for GB60/15 Active (Front), GS62 (Rear)
JL HD750.1 for 2 x JL 12TW3 (Stealthbox)
UMIK-1 Mic (Also have a IMM-6)
Started to prep for my upcoming build and first time tuning. I had some questions specific to setting up channel gain and output levels before I use the both the Helix RTA/Auto EQ (after reading on CAJ) and/or REW. Iin preparation of the tuning process, I have been playing with the PC Tool in demo mode for a week or so and absorbing what I can from Youtube tutorials for Helix and REW.
I plan to use the AF House Curve and will set my sub amp gain with an O Scope at 40hz (then double check with a multimeter vs JL's recommended voltage, they have usually been damn close in the past) before I tune.
Question #1 - Left / Right Gain Balance
Can/Should I do this quick and dirty using an IMM-6 (or REW w/ UMIK-1) to get SPL within a couple db of each other? Or set them to equal gain/output and let the tuning process (whether AutoEQ or REW) vette this out?
Question #2 - Subwoofer vs Door Speakers/Tweeter Gain
I generally see that most house curves have sub 100 Hz +10db (and tapering off) for the most part and wondering how folks adjust this before tuning? Or if they adjust this at all?
In my brain I am thinking that my door speakers and tweeters should all be set -10db (or close) in the Helix software before I tune but looking for advice. Is this pointless before tuning?
Question #3 - Tuning Order
I have seen a few different strategies using the HelixRTA / AutoEQ feature. My strategy right now is:
- Right Front (GB60 & GB15), No Sub
- Right Rear (GS62), No Sub
- Right Front and Rear, No Sub
- Left Front (GB60 & GB15), No Sub
- Left Rear (GS62), No Sub
- Left Front and Rear, No Sub
- Sub Only
- All Channels
How does this look? Any advantages to tuning the left side vs right side first? I know most folks tune each driver individually but I have been reading very promising things about the AutoEQ in the Helix RTA and most people tend to group drivers there. I am planning to tweak specifically in REW after the fact but I know I will be pressed for time when I first get my rig set up and won't have the hours to spare to tune fully in REW as a noob.
Hopefully @SkizeR takes a look at this Seems to the local Helix guru here on DIYMA and CAJ.
Thanks to anyone that can help!