Hi all - new DIYMA user here. I recently installed a Rockford Fosgate DSR1 and an Alpine XD600/6v2 amp in my 2018 Dodge Challenger. Everything works as expected and I've done some basic "by ear" tuning, but I want to explore some of the more "technical" and "proper" ways to tune.
Since the DSR1 is controlled from a mobile device, I'm trying to stick with the "mobie device" tools in order to get a baseline tune and then adjust for preference from there.
I have the Dayton Audio IMM-6 mic (and calibrated using the calibration file for it's serial number) and purchased the Android AudioTool app. I have my crossovers set (properly or not is up for debate!).
I have a 6-speaker system (do NOT want subs in the trunk, but have an under-the-seat sub on the way to help a little with lower bass):
- (2) 3.5" Infinity Reference speakers in the dash (2-way speakers)
- (2) 6"x9" Infinity Reference speakers in the doors (2-way speakers, but using them for bass only at this point)
- (2) 6.5" Infinity Reference speakers in the rear-deck (2-way speakers)
Currently, I have the crossovers for the door speakers set to a LP of 450hz and the dash speakers set to a HP of 450hz (24db Linkwitz Riley). I've been experimenting with the crossovers for the rear-deck speakers and a bandpass of 60hz->500hz seems to sound the best - but honestly, I'm not sure if I should technically have them play mid/highs as well or not. I've tried 60-5000, 60-7000, etc - but it seems to 'spoil" the front-stange sound when I use it for the higher frequencies. But honestly, I'm not worried about the rear-deck speakers for now - so I don't want to waste too much time on those here. Right now, getting the front stage setup properly is what I want to work on.
I'm trying to unstand the following a little better:
1. How to best set the levels bwtween the door 6"x9" and the dash 3.5" speakers. Not quite sure how to determine the proper level for the the 3.5" speakers. Do I play pink noise on each separately and just match the DB level? Does it matter if I use db, dBa or dBc for this? Obviously, the 3.5" speakers are way too "in your face" at full level. Right now I think I have them at like -8db - but I want to understand how to set that level properly to match the 6x9 level in the doors.
2. How to get the speaker response "flat" before adjusting for preference. Since I'm not using REW or or sort of "target curve", I just want to adjust the EQ so they are truly "flat" - and then adjust for prefernce from there. I know that I would use AudioTool to do this, but not quite sure if I should be using Flat, A-weighted or C-weighted in AudioTool when reviewing the frequency response of each speaker. Do I just play pink noise from each speaker and adjust EQ until it's "flat"? Do I use A- or C- weighted when doing this?
I guess let's just leave it at that for now. The DSR'1 sets time alignment based on distance measurements, so I can get "in the ballpark" with that. I'm just not sure how to accomplish #1 and #2 above. I know that there is a lot more to this - but I want to understand those two items a little better before I go much further.
I know I have a lot to learn - but trying to take it a step at a time. :-)
Thank you in advance.