Expected more from my system - Road Glide Forums
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post #1 of 21 (permalink) Old 11-13-2015, 10:50 AM Thread Starter
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Expected more from my system

Well i have a delimma. I recently installed a new amp and speakers in my glide and tuned them properly using a DMM and i am not as impressed as i thought i would be. here is my equipment:

Stock HK head unit
PAC SNI-35 low level line converter
SounStream Pn4.1000d amp (250w x 4 at 2ohm, 140w x 4 at 4 ohm)
Biketronics 7.1 titan II in fairing (factory location)
Biketronics 6.5 Titan II in lower fairing speaker pods
Speakers are wired in parallel to achieve a 2ohm load per front channel

Formula used to determine proper voltage - V = √PxR
V = Voltage at amp output
√ = Square root
P = RMS output of amp at required ohms
R = ohms the amplifier will see from speaker(s) on that specific channel

I got the formula information from this thread over at HDForums.com. It was later determined in that thread to use the RMS watt rating of a single channel instead of both front channels combined.

Setting Amp Gains by Ear and/or with DMM - Harley Davidson Forums


So based upon my setup i used the following numbers in the formula.......
V =√(250 x 2)
V =√500
V = 22.36

So based upon this info i proceeded to adjust my gains using the method described in the above linked thread. I turned all my settings on the HU to flat and turned off the AVC. Then i inserted my 1000HZ 0db test tone cd that i created. Once that was playing and on repeat i checked the voltage coming out of my low level lin converter and noticed that it is only 3.3 volts with the adjuster turned all the way clockwise and not a true 4 volts. Could this be the reason? Next i connected my amp inputs and adjusted my gains to the proper Voltage. the closes i could get it to 22.36 was 22.2. This left my gains at just shy of the 10:00 position. Trying to adjust it with the bike running made for very unsteady hands....lol

After i made the adjustments i proceeded to play a cd of mp3 that i had and noticed that certain songs were clipping. i did some research and saw some threads on here that recommended i use mp3gain to level out the volume across my songs. So i did that. at first it showed that all of my songs were clipping and set at well over the recommended 89 dbs. I adjusted them to 91db which was the sweet spot where i only had 3 out of 121 songs that were clipping. I burned them to a new cd and proceeded to test out the new adjustments and that is why I am here. They are clear with none to minimal distortion but i feel that the are not much louder then if i had the stock speaker turned all the way up.

I am in need of you guy's expertise!! Please help point me in the right direction. Thanks.


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post #2 of 21 (permalink) Old 11-13-2015, 10:59 AM
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Turn the avc back on and adjust the bass & treble to what your ears like.
I never understood that setting it up Flat, Who the hell listens to music flat?
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post #3 of 21 (permalink) Old 11-13-2015, 11:48 AM
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You did somthing wrong.because I have half of what you got and I can't think if the volume is 1/2 way up.when I was tuning I used tech support provided by the manufacturers of my equipment. They were all willing to help live wile tuning at one point I had JL Audio and hybrid audio on a conference call.good luck
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post #4 of 21 (permalink) Old 11-13-2015, 12:19 PM
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I think you are right Line leveler not needed pre amp volts are too low.
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post #5 of 21 (permalink) Old 11-13-2015, 01:00 PM Thread Starter
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Dozer, Are you saying i should use the high line outs from the stock HU instead of converting it with the low level converter?


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post #6 of 21 (permalink) Old 11-13-2015, 02:13 PM
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Originally Posted by Gixxere View Post
Dozer, Are you saying i should use the high line outs from the stock HU instead of converting it with the low level converter?

Yes, that's what he's saying.

Lose the line converter. At least to see if that's where your problem lies. You will lose just a bit of clarity.

Here's a less technical but tried and true way of setting your gains:

1-Hook everything up correctly with Eq set to your taste
2- turn your gains all the way down
3-turn your volume up to 75% of max
4-turn up gains until you hear distortion or clipping
5-turn your gain down a smidge


Put your fairing back on and ride your bike.


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post #7 of 21 (permalink) Old 11-14-2015, 10:01 AM Thread Starter
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09sharknose, Dozer...... I will give that a shot this morning.


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post #8 of 21 (permalink) Old 11-14-2015, 12:48 PM
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Good luck
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post #9 of 21 (permalink) Old 11-14-2015, 06:14 PM Thread Starter
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Quote:
Originally Posted by 09Sharknose View Post
Yes, that's what he's saying.

Lose the line converter. At least to see if that's where your problem lies. You will lose just a bit of clarity.

Here's a less technical but tried and true way of setting your gains:

1-Hook everything up correctly with Eq set to your taste
2- turn your gains all the way down
3-turn your volume up to 75% of max
4-turn up gains until you hear distortion or clipping
5-turn your gain down a smidge


Put your fairing back on and ride your bike.


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So i followed your method and i am stoked on how well it sounds. I removed the low level converter and used the high outputs and adjusted my gains by hear and it is much louder. Thanks for all the advice.
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post #10 of 21 (permalink) Old 11-18-2015, 03:01 PM
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Originally Posted by Gixxere View Post
So i followed your method and i am stoked on how well it sounds. I removed the low level converter and used the high outputs and adjusted my gains by hear and it is much louder. Thanks for all the advice.


Just for the record

The instructions over "there" were put up at several recommendations and are in fact the way it's been done since dirt. Some agree, some don't but nonetheless that's the way to do it. 99% of the time I don't use the DMM method. I do it by ear and rarely am I far off at all. For those that come over and absolutely must see where their amps are clipping, the scope comes out and I show them.

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