Lost all treble to front speakers

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Dec 12, 2015 | 11:28 AM

#31

haze324

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Joined: Aug 2008

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From: S. FL

I'm thinking the .bin on/off files and the true connects being line converters and not true line levelers like the magic box or BT ones. Once you turned on the bike and ran it at hwy speeds who knows how much distortion was getting to those speakers that you can't really hear at high speeds. I had a buddy fry the tweeters off a set of HAT Mirus on the highway with that same amp and those things can take some power.

I think it's a combination of all of the above.

Dec 12, 2015 | 01:10 PM

#32

Babyboy

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From: Lockport Illinois

Lost all treble to front speakers

Well testing is complete! !!!!!

Output Voltages on amp were for testing only

Using 1k hz test tone

At 60mph AVC OFF
14.2 volts battery
11 Volts output at amp

AVC 1 BAR
16 volts amp output

AVC 2 BARS
24 volts amp output

AVC 3 BARS
27 volts amp output

AVC 4 BARS
27 volts amp output

So with this said I have came to the conclusion I feel I have found the reason for the blown tweeters.

The AVC DOES INCREASE the output voltage considerably at 16 v ac in my test.

Last edited by Babyboy; Dec 12, 2015 at 01:16 PM.

Dec 12, 2015 | 01:54 PM

#33

Bertk

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Joined: Mar 2008

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From: SW Florida

Very good information here. I was thinking it was a combination of things also, but did not have the knowledge to comment. This combination may not have been as dramatic with lower power amps, but with ~237Watt at 2ohms the results were quick and destructive.

I have seen it posted to be careful using AVC with higher powered amps. This raises a couple of novices questions.

When AVC kicks in I am assuming this increases the voltage which increases the current to the speakers? A little help from google...

If the above is true and assuming we knew what the voltage increase was for each increase in AVC was, would there a way to compensate for the voltage/current increase when setting the gains by DMM?
I suspect this would take some high tech equipment and each combination of speakers/amp would be different.

I am probably over thinking this but would like to know the best advise to give when recommending these high power amps. I think all the info is out there, but it scattered throughout forum. I have come up with a few recommendations/warnings when using HIGH POWER AMPS in particular. Please correct me if I am wrong. And if anything else should added to the list.

Choose your components carefully. Always ask before making a purchase!
When installing an after market amp on a 2014+ bike with the stock HU (head unit/radio) use the Biketronics Line Levelers. There is more info on the LL's here and another here.
Settings gains is crucial. If setting the gains with a DMM (see procedure) then go to this post in that thread before calculating the AC voltage. Better to be safe than sorry!
Make sure the bike is running and increase RPM's to achieve ~14.4 volts. If there is ANY doubt, ask!!!
Once the gains are set correctly, be careful when increasing the AVC (Automatic Volume Control). This will add more power to the speakers the faster the bike is traveling! The best advise is to turn AVC OFF on the HU.

Dec 12, 2015 | 09:26 PM

#34

Ragz Ultra

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Joined: Apr 2015

Posts: 163

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From: TN

Wow! That is significant. I would agree that you have found what blew your tweets. It proves again once your gains are set not to exceed the volume.

Were those truconnex still installed when you did this? It might be worth knowing to the other members if line levelers are part of the equation or not. I'm not sure how or if the gains on them would affect amp output as well.

Wonder if we can get Bill from BT to take a look here?

Dec 12, 2015 | 09:57 PM

#35

Bertk

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From: SW Florida

Quote:

Originally Posted by Ragz Ultra

It would be interesting to see what the voltage out is with the BT Line Levelers installed compared to the line converters.

Dec 13, 2015 | 01:07 AM

#36

Babyboy

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From: Lockport Illinois

If I had the BT LL to test I would do it with the same settings I have ran this test. But at this present time $$$is tight with Christmas coming quick so I can't afford them right now

Dec 13, 2015 | 01:24 AM

#37

Babyboy

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From: Lockport Illinois

Quote:

Originally Posted by Ragz Ultra

The truconnect were still in the equation.
Voltages at the output side of the truconnects was 2.7 volts(at idle) with sled idling and no movement.

The AVC gets a signal from the BCM via the can bus.
I tried the test on the stand in 6th gear and 60 mph on speedo and voltage didn't change on the output of the amp.
I had to get out on the road to get the AVC to activate so it is getting input from the vss and another sensor
(I could not find the other input on the wiring diagram) so I am guessing it it from an ABS sensor on the front wheel.

Dec 13, 2015 | 01:33 AM

#38

Babyboy

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From: Lockport Illinois

I will find this DEMON and kick it's *** to save everyone from the having to go thru this headache one way or another on the 14 and up Rushmore.
The Demon is in me for about $300 so far but I will KICK HIS *** before I am done so for everyone else won't have to go thru this like I am

Rushmore test MONKEY I have become!!!!