Couple of AMP Install Questions - Road Glide Forums
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post #1 of 20 (permalink) Old 11-10-2015, 09:51 AM Thread Starter
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Couple of AMP Install Questions

My shiny new Cerwin-Vega B2 amp arrived last night and I had time to put it on the bench and test to make sure that everything worked before I start tearing into the bike.

I have a couple questions that I'm hoping someone here can answer.

Bike is 2015 Road Glide with stock 4.3 HK radio

1. What diameter ring terminal is required for power line connection to the battery terminal? Is is 1/4", 3/8", 1/2" or other?

2. Anyone have speaker wire color code for front left and front right?
The only info I've found is from Hawg Wired and they say;

Front Left + / White-Orange
Front Left - / Light Green - White
Front Right + / Gray-Red
Front Right - / Light Green - Black

Are those correct? Any help on the two questions would be greatly appreciated.

Thanks.


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post #2 of 20 (permalink) Old 11-10-2015, 10:01 AM
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wires are gonna be pink in color...the pink with the black stripe is positive.. cant miss them they are going into the speaker boxes on either side inside the fairing
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post #3 of 20 (permalink) Old 11-10-2015, 12:12 PM Thread Starter
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I found an online photo of the service manual for 2014 touring showing the following;

Left Front Negative Pink/Gray
Left Front Positive Pink/Orange

Right Front Negative Pink/????
Right Front Positive - Pink

That look right?


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post #4 of 20 (permalink) Old 11-10-2015, 02:40 PM Thread Starter
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Ok, the battery post bolt is 10MM so now I know what size ring terminal I need. Just an FYI for anyone else needing the same info in the future.


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post #5 of 20 (permalink) Old 11-10-2015, 03:42 PM
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Originally Posted by wevsspot View Post
I found an online photo of the service manual for 2014 touring showing the following;

Left Front Negative Pink/Gray
Left Front Positive Pink/Orange

Right Front Negative Pink/????
Right Front Positive - Pink

That look right?
Yes, and the other side is pink/black I think. I remember they were just slightly different
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post #6 of 20 (permalink) Old 11-11-2015, 08:17 AM Thread Starter
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Thanks for the confirmation Shorty. Much appreciated!

Also, for anyone needing this info in the future.......

The battery post bolt is 10MM and requires a 1/4" ring terminal to connect accessories or AMP.



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post #7 of 20 (permalink) Old 11-16-2015, 11:49 AM Thread Starter
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Over the weekend I finished the installation of my new AMP (Cerwin-Vega B2) to compliment the JBL GTO638 speakers that I installed the first week I bought the bike.

All I can say is Wow. AMP install was ALOT of hard work, especially fitment in the shark nose, but it was well worth it.

AMP gain was set using a digital multimeter and the crossover frequency set by ear. The GTO638 speakers don't really play well with frequencies below 100hz at high power input and high volume. My input voltage to the speakers is approximately 31.62v and crossover is set at 120Hz (best guess).

This allows for almost uncomfortable volume levels when the bike is running.

The GTO638 speakers are rated 50Hz-21,000Hz at 60W RMS and that is probably a pretty fair and accurate rating. Just be advised that if you want high volume when jamming down the highway at 80mph you will probably want to set your crossover frequency somewhere above 80Hz minimum.


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post #8 of 20 (permalink) Old 11-16-2015, 12:19 PM
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Originally Posted by wevsspot View Post
Over the weekend I finished the installation of my new AMP (Cerwin-Vega B2) to compliment the JBL GTO638 speakers that I installed the first week I bought the bike.

All I can say is Wow. AMP install was ALOT of hard work, especially fitment in the shark nose, but it was well worth it.

AMP gain was set using a digital multimeter and the crossover frequency set by ear. The GTO638 speakers don't really play well with frequencies below 100hz at high power input and high volume. My input voltage to the speakers is approximately 31.62v and crossover is set at 120Hz (best guess).

This allows for almost uncomfortable volume levels when the bike is running.

The GTO638 speakers are rated 50Hz-21,000Hz at 60W RMS and that is probably a pretty fair and accurate rating. Just be advised that if you want high volume when jamming down the highway at 80mph you will probably want to set your crossover frequency somewhere above 80Hz minimum.
Just curious why you felt the amp install was "a lot of hard work"? Im cracking mine open shortly, but opted for the biketronics amp so that I could use their mount to make the job easier (at least I hope). I actually wanted the B52 amp.
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post #9 of 20 (permalink) Old 11-16-2015, 12:28 PM
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Originally Posted by wevsspot View Post
Over the weekend I finished the installation of my new AMP (Cerwin-Vega B2) to compliment the JBL GTO638 speakers that I installed the first week I bought the bike.



All I can say is Wow. AMP install was ALOT of hard work, especially fitment in the shark nose, but it was well worth it.



AMP gain was set using a digital multimeter and the crossover frequency set by ear. The GTO638 speakers don't really play well with frequencies below 100hz at high power input and high volume. My input voltage to the speakers is approximately 31.62v and crossover is set at 120Hz (best guess).



This allows for almost uncomfortable volume levels when the bike is running.



The GTO638 speakers are rated 50Hz-21,000Hz at 60W RMS and that is probably a pretty fair and accurate rating. Just be advised that if you want high volume when jamming down the highway at 80mph you will probably want to set your crossover frequency somewhere above 80Hz minimum.

Why would adjusting it to crossover above 80Hz matter? I assume that's the low pass freq which would mean everything above 80Hz would come through anyway. Now if that's the high pass freq, that would be interesting for a set of 6.5 speakers.


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post #10 of 20 (permalink) Old 11-16-2015, 12:45 PM
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Thanks for the info! I'm no stereo savvy tech guy, so this will help me alot. I think...!


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