Audio Systems Find answers to all of your stereo, speaker and other audio technology questions here.
Sponsored by:
Sponsored by:

Amp and speakers on the way - how to connect?

Thread Tools
 
Search this Thread
 
Old Jan 11, 2021 | 07:30 AM
  #1  
Mchad's Avatar
Mchad
Thread Starter
|
Club Member
10 Year Member
Shutterbug
Joined: Dec 2014
Posts: 10,734
Likes: 3,755
From: SWFL
Riders Club Member
Default Amp and speakers on the way - how to connect?

Following advice here, my soundigital amp and Ground Zero speakers are on the way. While I have the fairing off I plan on installing the old style fairing vents (the ones that actually close) and new lower supports so I can use my Lindby Magnumbar crash bar, and the next to useless fairing mount antenna.

Anyway, I have a couple of questions. 1) what is the best way to mount a 400.4 amp? Any bracket suggestions? And 2) I bought a diag4bike and it has several radio eq flashes. If I use the right one (I have to figure out which) can I simply use the high level outs directly into the amp?

Thanks
 
Reply
Old Jan 11, 2021 | 07:56 AM
  #2  
teedoff65's Avatar
teedoff65
Seasoned HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2017
Posts: 5,749
Likes: 1,603
From: High Point, NC.
Default

I just set my amps right under the hu on top of the backside of the headlight bezel. You can use some velcro to secure it down. MY 1200 fits longways and is tight enough that I didn't need velcro.

Cant answer about the diag4bike you bought.
 
Reply
Old Jan 11, 2021 | 11:15 AM
  #3  
Mchad's Avatar
Mchad
Thread Starter
|
Club Member
10 Year Member
Shutterbug
Joined: Dec 2014
Posts: 10,734
Likes: 3,755
From: SWFL
Riders Club Member
Default

Originally Posted by teedoff65
I just set my amps right under the hu on top of the backside of the headlight bezel. You can use some velcro to secure it down. MY 1200 fits longways and is tight enough that I didn't need velcro.

Cant answer about the diag4bike you bought.
Ok, so no bracket. I’m not so good with Velcro holding an amp in place, so I’ll look for a generic amp bracket. Regarding the flash, I’ll check with the manufacturer, but just to confirm, the objective is to remove all equalization and simply output a flat signal, right?

Thanks
 
Reply
Old Jan 11, 2021 | 12:09 PM
  #4  
SBates08's Avatar
SBates08
Seasoned HDF Member
Joined: Jan 2013
Posts: 10,637
Likes: 1,246
From: Lake, Ms
Default

Originally Posted by Mchad
Ok, so no bracket. I’m not so good with Velcro holding an amp in place, so I’ll look for a generic amp bracket. Regarding the flash, I’ll check with the manufacturer, but just to confirm, the objective is to remove all equalization and simply output a flat signal, right?

Thanks
This 3M dual lock Velcro is as good as any amp bracket you'll find.
Amp and speakers on the way - how to connect?-photo907.jpg
 
Reply
Old Jan 11, 2021 | 12:35 PM
  #5  
teedoff65's Avatar
teedoff65
Seasoned HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2017
Posts: 5,749
Likes: 1,603
From: High Point, NC.
Default

Yes I was skeptical at first on the velcro being strong enough. You really have to fight to get that stuff to turn loose. I had it on my stinger amp in my 17, now i have it to secure the RDRS module to the underside of the stock hu bracket and also I have my dsp velcroed in the brake side space next to the speaker pod.. Works great!

You could also get some heavy zip ties and when you take the HU out, zip tie the amp to the underside of the hu bracket. Then bolt your radio back down. I did this with my dayton dsp before the dsp I have now.
 
Reply
Old Jan 11, 2021 | 12:42 PM
  #6  
freakfxr's Avatar
freakfxr
Tourer
Joined: Apr 2020
Posts: 420
Likes: 60
From: USA
Default

I haven't done my 2019 yet, but I think like the original poster. I'd think Velcro could lead to vibration, loose cables, etc. Everyone says I'm wrong. I'll follow this thread and see what happens as a stereo upgrade is in my future. I like to go in the there once and be done, and on the occasion taht I do need to go back in, if it is due to using velcro vs a bracket, I kick myself. I've been told the same, heavy duty velcro. We'll see when I get to my stereo.
 
Reply
Old Jan 11, 2021 | 12:49 PM
  #7  
04FXDI's Avatar
04FXDI
Stellar HDF Member
Photogenic
Photoriffic
Liked
Community Favorite
Joined: Feb 2015
Posts: 3,413
Likes: 1,117
From: USA
Default

Absolutly, the builders use this on our CMM and Robotic machines, some of the CMM's measure 7 days a week without issue, and the Robotic arms are stress testers. These are half million dollar precise measuring machinces. And we use this velcro, lol.

Originally Posted by SBates08
This 3M dual lock Velcro is as good as any amp bracket you'll find.
Attachment 604106
 
Reply
Old Jan 11, 2021 | 02:31 PM
  #8  
CaffeineBuzz's Avatar
CaffeineBuzz
Seasoned HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2019
Posts: 10,035
Likes: 10,766
From: SE Michigan
Default

Originally Posted by SBates08
This 3M dual lock Velcro is as good as any amp bracket you'll find.
Attachment 604106
never knew this, ya learn something every day
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-1

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-4

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-5

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-6

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-7

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-8

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-9

Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

 Verdad Gallardo
Old Jan 11, 2021 | 02:42 PM
  #9  
Mchad's Avatar
Mchad
Thread Starter
|
Club Member
10 Year Member
Shutterbug
Joined: Dec 2014
Posts: 10,734
Likes: 3,755
From: SWFL
Riders Club Member
Default

I get it, but my problem is not the Dual Lock, but the adhesive used to stick it. Here in south Florida it’s hot. Really hot. From June to October this won’t see temps below 90 very often, and over 100 regularly. I’d be worried about it getting soft and coming apart.

I’ll keep looking for a bracket. I’ve seen a couple on Amazon.
 
Reply
Old Jan 11, 2021 | 03:05 PM
  #10  
SBates08's Avatar
SBates08
Seasoned HDF Member
Joined: Jan 2013
Posts: 10,637
Likes: 1,246
From: Lake, Ms
Default

Originally Posted by Mchad
I get it, but my problem is not the Dual Lock, but the adhesive used to stick it. Here in south Florida it’s hot. Really hot. From June to October this won’t see temps below 90 very often, and over 100 regularly. I’d be worried about it getting soft and coming apart.

I’ll keep looking for a bracket. I’ve seen a couple on Amazon.
I understand your concerns. It's just as hot here in Ms and this 3M will not let go. In fact, to separate the two halves once you have them in place you'll need a small flat head screwdriver.
 
Reply



All times are GMT -5. The time now is 08:45 AM.

story-0
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-1
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-2
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-3
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-4
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-5
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-6
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-7
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-8
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE
story-9
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

Slideshow: Graeme Billington's left-hand-drive Shovelhead is as much about problem-solving as it is about classic Harley form.

By Verdad Gallardo | 2025-12-30 11:27:08


VIEW MORE