AQ3500d daily at 19.2v safe?

[shizzzon 10+ year member]

I already talked to AQ and from what i gather, they've never tested it like that.

I'm planning on upgrading to 18v system and mechman suggests to tune the regulator to 19.2v to properly charge all 16v batteries.

I already talked to sundown, they said their amps can handle it fine but i do not own Sundown... I own Audioque.. so it would be beneficial if the 3500ds can handle it.

I have yet to see a single test of an 18v system with the car on... so i am clueless if it's safe.

Click to read more...

 

[Kastlez_ 10+ year member]

you're going to melt it...

//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[adas Pro Seller]

be a pioneer //content.invisioncic.com/y282845/emoticons/thumbsup.gif.3287b36ca96645a13a43aff531f37f02.gif

 

[shizzzon 10+ year member]

well, if i upgrade to 18v system, i do not want to compete with the vehicle off...

I might just have to end up sellin them off and getting another board that can handle the voltage

 

[JL Audio 5,000+ posts]

well, if i upgrade to 18v system, i do not want to compete with the vehicle off...
I might just have to end up sellin them off and getting another board that can handle the voltage

where are you in KY?

 

[sundownz Pro Seller]

It probably will handle it as long as the protect isn't set below that point.

 

[shizzzon 10+ year member]

where are you in KY?

Same area you sold that 15" icon too. So about just over 2hrs away.

 

[shizzzon 10+ year member]

It probably will handle it as long as the protect isn't set below that point.

Well, i have a question to pic at those who compete since that's usually when people run 18v systems.

What is the point of advertising 18v capability if it's "suggested" to only use 16v batts with the vehicle off?

16v batts float just a hair under 18v so the alt must be set just above 19v to properly keep them topped off.

So, is my assumption correct that the people who run 18v setups can only run them with the vehicle off and if that's not true, are they purposely setting their regulator below 19v just to "somewhat" keep the batts charged then have to come home every other night and put them on a real battery charger?

 

[JL Audio 5,000+ posts]

i'm going to come up and see you guys sometime in the future... when I have my system done ^_^...lol

 

[sundownz Pro Seller]

Most SPL leagues limit you to 18.0 maximum -- so many amps are set there for that reason.

 

[18inchjeepin 10+ year member]

Well, i have a question to pic at those who compete since that's usually when people run 18v systems.
What is the point of advertising 18v capability if it's "suggested" to only use 16v batts with the vehicle off?

16v batts float just a hair under 18v so the alt must be set just above 19v to properly keep them topped off.

So, is my assumption correct that the people who run 18v setups can only run them with the vehicle off and if that's not true, are they purposely setting their regulator below 19v just to "somewhat" keep the batts charged then have to come home every other night and put them on a real battery charger?

people set the regulators at 17.9-18, most HO alt are adjustable, so they can turn them up

 

[FatPat*da*Ratt 10+ year member]

it should work fine...I'm in for vids //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[shizzzon 10+ year member]

Most SPL leagues limit you to 18.0 maximum -- so many amps are set there for that reason.

I totally forgot about that.. I'm glad you brought that up.

However, i was just reading the 2009 rulebook for MECA as that will be my competing Sanction for my area in this country.

"4. Upgraded electrical & charging systems allowed. Unlimited batteries, capacitance, alternators, and voltage allowed."

Using 16v batts will force me into ModEX division. That's fine, i don't care.

I run 4 15s in a wall in a scion tC. I've already impressed several people with it... My main downfall is my port area is only large enough for 2 15s instead of 4...

I'm still barely breakin a 153 at the headrest right now but over a 156 in the kick.

I'm still tryin to tweak it.. the increase in voltage will sure help.

 

[dB-r 10+ year member]

In an unregulated power supply amplifier, like you have and like most of them are these days, as your input (battery/charging system) voltage increases so does the working voltage coming from the power supply in the amp feeding power to the output section of the amp. The winding counts on the power supply transformers is what determine what voltage is stepped up to in the output section of the amplifier to be used as working voltage by the output transistors (mosfets).

If the normal working voltage (rail voltage) is 125VDC+ and 125VDC-, which it likely is in that amp, that means you are normally (when the input voltage to your amp from your charging system is 14VDC) at 250VDC (sum of the + and - rails) working voltage. The mosfets used in most of those amps are 400VDC working voltage. So even increasing the input voltage by 50% (from 14 to 21 volts) which would result in a 50% change in rail voltage would only put you at 375VDC (187.50VDC+ and 187.50VDC-) you should be alright and still within the operating limits of the output mosfets.

However there are secondary auxillary taps on those transformers in the amps and they are rectified and tied into voltage regulators and if you exceed the input working voltage for a voltage regulator you might cause it to go bad or shutdown, or overheat and eventually "not regulate, just pass the working voltage" onto the other parts of the amp like the input circuit, output and power supply drive circuits and protection circuits.

So there are many things to consider.... BUT I can tell you that I have seen many of the more common modern amplifiers run at 19-20 volts without problems. SOME go into protect above 17.2 volts or so, but if you turn the amps on/off you may be able to get it to come on and stay on anyway. Just my experience with them. I think you may get some flack from judges and other competitors if they see you are running over 18V's as that is not allow in some classes. But if you are in a MECA class that doesn't care what voltage you run, then YES, you should be alright charging at 19.2 and leaving the car running while burping, bass racing etc...

 

[mrezstreet 10+ year member]

Do it. I wanna see what happens