LUCID

Using the dd1 +. I was able to find out my head unit is clean at max. (ra670), using tracks from website and Spotify, Bluetooth and usb cord. Question 1 From the dd1+ Why did I see a range from 4.4-4.6 vrms when performing hu max distort on my JL 800/8amp and 17 vrms coming from my JL rd-1500 amp? I’m asking because I don’t believe I was able to set my sub amp correctly. I followed the directions. But I wasn’t able to adjust pass +9 overlap because the gain knob was all the way down at that point??? I wanted +7 over lap, either way gain was fully down and the dd1+ read +9db while setting over lap. I noticed once I pressed read and then switched to the 40 overlap track the numbers on the dd1+ would start at +3db and climb to +15db on its own, like it was glitching, it did this a few times. I did not have this problem when setting my full range amplifier..for now I set the gains using the amps distort light and backed off till it disappeared. Yes I had frequencies all the way up, bass boost off, volume bass knob up And from head unit eqs off, tones flat, loud off, Volume limits up, sub level up.

JUST READ ALL NEW COMMENTS NOW Thank you all for replying, I did not get a chance to test stereo in my truck. However after digging through some YouTube videos, I came across other users whose dd1 did not detect usb or bluetooth at HU as well. So today, I downloaded test tracks from Damore engineering website and JL audio as well, I played them from the Apple Music app via bluetooth and also from a usb. I tried different settings today with and without loud feature activated and the HU would not distort using sine waves 40hz 0db and 1khz 0db. MY HU goes up to 24 max clean however I brought it down to 23 to be on the safe side while setting gains on the amps. I chose not to set gains with the dd1. I was provided gain level settings from JL based on their amps and speaker applications, so I set gains with a ac voltmeter. On my 800/8v2 some channels are being used in parallel, bridged and standard, so I wasn't sure if using the dd1 would be the safe option? Please roast me or provided insight on my decision, I'm a newbie, but willing to soak and retain as much information as you guys are willing to share. The JL rd 1500 has clip light feature, so I utilized that plus the level gain settings provided by JL for my 2 12w6's. I have some new questions. Does Spotify change things? as far as finding the HUs max before it clips. Today when finding my Hu's max I had the loud feature activated for all zones, and it did not distort. I set my gains while the loud feature was activated as well, does anyone think that's a problem? The loud featured is auto activated unless I disable it, and I like that I can reach louder volumes at lower levels. Also I noticed in my HU that there's subwoofer filter frequency for each zone, there's no way to turn it off, I thought this would be problem while finding the HU's clipping point but once again the HU is clean at max no matter what frequency was set at. Any one have insight on this. It was long day. smh. But I enjoyed

Hey Joe, does it matter that I’m using Bluetooth to play the test tones? I’ve been researching like crazy to find out what’s happening. Actually Bluetooth is all I’ll be using, that and Spotify. I don’t use anything else. This unit does not have a cd player and I’m definitely not going to use usb to play music either. Could this be the reason why the dd1 is not detecting distortion?

Ok I’ll check the dd1 cables tonight, I saw there’s a video for this on the smd website, this weekend I’ll have time to check the stereo in my truck. In the meantime, does anyone else have any input to add.

I’m using Bluetooth/Spotify as my only way to listen to music on my HU Could be this be the reason why the dd1 is not detecting distortion?? I have a marine head unit, Fusion ra670 along with a JL 800/8v2 amp. I'm using the dd1 and it won't or can't detect any distortion from my unit. Heres what I've tried. New batteries used are Rayovac and then Duracell. I've tried hooking the red probe to positive speaker terminal (positive puts out signal) and black probe to ground. I've tried hooking the red probe to positive speaker terminal along with black probe to negative speaker terminal. I turned the INPUT SENSITIVITY all the way down, filter mode switched off. Even turned frequency levels up on the 3rd try even tho it wasn't necessary. Went through all the settings in my head unit, put everything to flat in each zone, and turned off loud options as well. I used the 0db 1khz and 0db 40hz test tones from the Smd website via bluetooth. The dd1 detects signal at around 15 and 40hz at 16, same for 1khz track. I kept going up on volume and the dd1 could not detect any distortion for both tracks 1 and 2 test tones. My head unit max volume is 24. I also made sure each zone volume limiter was set to 24 as well. I also have a JL Rd 1500 amp with 2 subs, I did not test that yet since I've been trying to figure out what's going on? What am I doing wrong? or could it be my Deck is distortion free, which I doubt.