I did some testing last night on different flashes for the Boom Head Units. Here are some details and a link to the results.

Bike: 2018 Road Glide Ultra
Boom HU touchscreen
Software Version 1.21.2.1
Full Range pink noise through Bluetooth on Iphone 7 with Noise Gen app
Volume 3 bars from top on all tests
Speaker level inputs into AudioControl DM-RTA from Left front speaker for all flashes except with BT355 mentioned below
RCA level input from BT355 to AudioControl DM-RTA for the BT355 with 4/0 flash
Techno Research Centurion Audio Flash tool with dealer license for multiple bikes

In retrospect, there is more testing I could have done such as voltage, and radio resets between flashes, but this time it just didn't happen. I also wasn't super familiar with the software for everything yet. Learning as I went. Some of the curves in the DM-RTA had different scaling, so look at the 60 Db or 70 Db scale above graph. That is something I will edit in the future. Let me know what you guys think and feel free to PM me with any questions.

Google drive link to PDF results here - Link should be open without having to request access

https://drive.google.com/open?id=1fu...-ZPCFuN_NFGIOm

Here are my thoughts. The HD 8/2 flash is the flattest and provides the most full range. 2/0 and 4/0 from HD just plain suck unless you put a BT LL on them. JM, RF, and Kicker all seem good as well and would probably work well with simple systems as they have a bit of boost in the lower midbass area, but not excessive like HD. IN my opinion, if you're going DSP, go 8/2 and run speaker level inputs or a PAC LOC into the DSP. The BT355 on 4/0 is solid and really does a great job of taming the HD curve.

I didn't do every flash available simply because of time. I did the popular choices that seem to get the most questions.

To my knowledge, HD dealers can only do the following without a BOOM system installed
2/0 and 4/0

8/2 and the other flashes have to be done with the Techno Research tool.

Enjoy!!

 

Great info Andy! Thanks for all the testing, really answers a lot of questions.

 

Dude, that’s awesome and what great info for guys. Even though I have old school HU, great info/help for me for when guys ask me to upgrade their factory system.

Thanks Andy!

 

Thank you for the insight and the work you put in on this.

Greatly appreciated!

 

Quick question, BT355 pots in default positions?

T

 

they were not adjusted

 

Very nice work Andy. Thank you for sharing.

 

This is great info. Congrats on the new toys/test equipment.

On the 8/2 flash is it speaker level into the DM RTA?

Is reference 8 missing or just mislabeled? Looks like the 4 in the description should be 2? Maybe I'm missing something.

The branded flashes look really similar. Did you do any subjective listening, or not enough time?

 

Speaker level into every flash with exception of the BT355 4/0 test

 

Bringing this back to the top since it’s good info.