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

Amp install

Thread Tools
 
Search this Thread
 
Old Jan 4, 2023 | 12:28 AM
  #1  
2011BlackGlide's Avatar
2011BlackGlide
Thread Starter
|
Intermediate
10 Year Member
Liked
Loved
Joined: Jan 2015
Posts: 29
Likes: 3
From: Lakeland Florida
Default Amp install

Can I split the front left and right speaker outputs coming out of my factory head unit so I have four inputs going into my amp or do I need to use the front and rear left and right outputs to go into my amp giving me four?
 
Reply
Old Jan 4, 2023 | 06:26 AM
  #2  
chopper_man's Avatar
chopper_man
Stellar HDF Member
Veteran: Army
10 Year Member
Liked
Community Favorite
Joined: Apr 2016
Posts: 3,279
Likes: 2,075
From: Masshole
Default

You can split them just fine, lot of folks do. Why not use the front and rears tho so you can have fade ability?
 
Reply
Old Jan 5, 2023 | 03:23 AM
  #3  
travelingypsye's Avatar
travelingypsye
Stellar HDF Member
5 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Dec 2017
Posts: 3,367
Likes: 689
From: indiana
Default

It depends on what amp you are using. For example, if using a stinger spx 700x4 you don't need to since it has a 2-4 channel input switch. If you leave it in 2 channel input, it will deliver the signal to all 4 channels. If using a sound digital amp then you will need 2 splitters to feed all 4 channels.

Depending on what flash you have, you wont have fade control. A 8/2 flash doesnt allow fade control to work.
 

Last edited by travelingypsye; Jan 5, 2023 at 03:24 AM.
Reply
Old Jan 5, 2023 | 06:49 AM
  #4  
2011BlackGlide's Avatar
2011BlackGlide
Thread Starter
|
Intermediate
10 Year Member
Liked
Loved
Joined: Jan 2015
Posts: 29
Likes: 3
From: Lakeland Florida
Default

I am using Kenwood KAC-M3004. I am only using the two fairing speakers so I don’t need fader capabilities. I can’t afford bag speakers or flash so I’ll keep using split front left and rights for now. It seems to be working. Unless I’ll get more power or better sound by a flash and using the rears to get four inputs?
 
Reply
Old Jan 5, 2023 | 07:07 AM
  #5  
travelingypsye's Avatar
travelingypsye
Stellar HDF Member
5 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Dec 2017
Posts: 3,367
Likes: 689
From: indiana
Default

What year bike and head unit do you have?
 
Reply
Old Jan 5, 2023 | 09:22 AM
  #6  
2011BlackGlide's Avatar
2011BlackGlide
Thread Starter
|
Intermediate
10 Year Member
Liked
Loved
Joined: Jan 2015
Posts: 29
Likes: 3
From: Lakeland Florida
Default

2021 Road Glide FLTRX. I believe boom gts
 

Last edited by 2011BlackGlide; Jan 5, 2023 at 09:24 AM.
Reply
Old Jan 5, 2023 | 09:34 AM
  #7  
travelingypsye's Avatar
travelingypsye
Stellar HDF Member
5 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Dec 2017
Posts: 3,367
Likes: 689
From: indiana
Default

Originally Posted by 2011BlackGlide
2021 Road Glide FLTRX. I believe boom gts
You need to flash the head unit. If not you are taking a chance of blowing the amp and/or speakers.
 
Reply
Old Jan 5, 2023 | 11:13 AM
  #8  
cshocker's Avatar
cshocker
Stellar HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2016
Posts: 2,209
Likes: 668
From: Andover, MN
Default

That amp doesn't take speaker level inputs. So you will have to run a line out converter (speaker input to RCA output) and then split those RCA to all 4 RCA inputs on amp. Like Gypsy said, I wouldn't do it without a flash. Find $100 and go get flashed. Don't even worry about lid speakers. You're looking at approx $1500 to add lid speakers to make it worth it while riding down the road. Spend your money on your fairing.

Find the nearest Techo Research dealer near you (not a Harley dealer): https://technoresearch.info/dealer-map/
 

Last edited by cshocker; Jan 5, 2023 at 11:15 AM.
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-1

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

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

 Verdad Gallardo
story-4

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-5

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-6

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-7

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-8

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

 Verdad Gallardo
story-9

The Best and Worst Harley-Davidson Moves of 2025

 Verdad Gallardo
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
rochman
Audio Systems
1
Feb 10, 2019 07:58 AM
Big trucker
Motorcycle Audio-Buy/Sell/Trade
2
Aug 22, 2018 12:06 AM
RickK
Audio Systems
4
May 4, 2018 09:52 AM
Mattydejr
2014-2024 Touring Models
2
Jan 30, 2018 12:41 PM
FLYINGBROKE
Audio Systems
59
Jul 12, 2017 06:15 PM




All times are GMT -5. The time now is 03:20 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
The Best and Worst Harley-Davidson Moves of 2025

Slideshow: A clear-eyed look at what actually worked for Harley this year, and what quietly undermined its progress.

By Verdad Gallardo | 2025-12-29 17:10:48


VIEW MORE