Adding an Aftermarket Amp(s)

[Sting_NC_USA]

Just wanted to know what amp bracket did you use and where did you get it from?

I'm pretty sure he used the JL Audio amp rack designed for the JL. It's a great option.

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[NathanSMSU]

FYI, you really need to move that strap to a different location. The sub will hit it, which can seriously distort the bass and potentially damage the woofer.

You could add some hardware to the sides of the box that your strap would connect to.

You can't see it from the pictures, but I have two rubber "stand offs" that are sitting on both edges of the sub where the strap passes over. I had the same setup in the Tahoe for 5 years and it worked fine. There is about 1/4inch clearance

But.....I had never thought about attaching some sort of "metal loop" hardware to both sides and using two straps....I like the idea! Thanks!

 

[DocG1914]

I'm pretty sure he used the JL Audio amp rack designed for the JL. It's a great option.

Yea that’s what I thought. Thinking about just making a rack because $200 is a lot for that but a lot of stuff is overpriced for the JLs so no surprise.

 

[timannnn6]

Just wanted to know what amp bracket did you use and where did you get it from?

That's the amp rack that comes with MBQuart system. Comes pre-drilled for their amps.

 

[Du0377]

Looking for some input from others who have also installed the JL audio stealthbox. I have had mine for abput 6 months and am completely underwhelmed by it. I never feel like there is enough bass, and I’m not a basshead. I do generally drive with the top off and when the top is on its a soft top. I see tons of reviews saying the bass is incredible, so I am wondering am I the only one who thinks it really isn’t that good, or is it a problem with my setup? I am running it with the jl audio marine m700 and 4 c650 jl audio speakers for sound bar and knee panels, and jl audio tweeters on the dash. Any input is appreciated.

 

[lashlee]

Without getting into the entire install, I would try to swap the sub speaker wires (positive and negative) to verify that you don't have some interference.

 

[Sting_NC_USA]

Looking for some input from others who have also installed the JL audio stealthbox. I have had mine for abput 6 months and am completely underwhelmed by it. I never feel like there is enough bass, and I’m not a basshead. I do generally drive with the top off and when the top is on its a soft top. I see tons of reviews saying the bass is incredible, so I am wondering am I the only one who thinks it really isn’t that good, or is it a problem with my setup? I am running it with the jl audio marine m700 and 4 c650 jl audio speakers for sound bar and knee panels, and jl audio tweeters on the dash. Any input is appreciated.

Hard to say, but make sure the signal going to your sub is crossed over to pass through only the sub frequencies. Occasionally folks accidentally send a full spectrum signal to the sub, which can cause it to choke.

 

[Du0377]

Hard to say, but make sure the signal going to your sub is crossed over to pass through only the sub frequencies. Occasionally folks accidentally send a full spectrum signal to the sub, which can cause it to choke.

so ended up going back to the shop that installed it because I kept having rattling in my sound bar, well turns out they had too much signal going to the mids in the sound bar and not enough to the sub. The”rattling”was the mids just getting too much juice and the lack of bass was my sub not getting enough. Sounds much better now but I am almost thinking it may need even more adjusting.

 

[Du0377]

Hard to say, but make sure the signal going to your sub is crossed over to pass through only the sub frequencies. Occasionally folks accidentally send a full spectrum signal to the sub, which can cause it to choke.

Also how would I adjust this myself? Is this something I would do with my amplifier? I’m not super educated with car audio, actually I don’t know much at all but I kind of want to play with it because I still feel like my highs are way too high and my lows dont hit as hard as they should be. Like if I turn my system all the way up its crystal clear but I want to hear more bass and from other reviews on the jl stealthbox it seems like it should be capable.

 

[Sting_NC_USA]

Also how would I adjust this myself? Is this something I would do with my amplifier? I’m not super educated with car audio, actually I don’t know much at all but I kind of want to play with it because I still feel like my highs are way too high and my lows dont hit as hard as they should be. Like if I turn my system all the way up its crystal clear but I want to hear more bass and from other reviews on the jl stealthbox it seems like it should be capable.

Bobby, here's the manual for your amp:

https://pdf.crutchfieldonline.com/ImageBank/v20200325141200/Manuals/136/136M7005_DL.PDF​

Check page 19 first, then 6-9, then 14-15. 19 displays the crossover and filter options available for the Front/Rear/Sub channels. Pages 6-9 reviews what those controls do, and Pages 14-15 contain charts displaying the voltages needed to match the gain/output needed for your sub and a chart with frequency ranges.

Typically you match the amp settings to the optimal ranges of your speakers. Best guess is that they missed the calibration phase of your install, but it's great to hear it's sounding better.

Before you adjust anything, you might want to take a picture of where the settings are now. Then, try to adjust one or two options at a time until you're happy with the sound.

Have fun with it!

 

[Du0377]

Bobby, here's the manual for your amp:

https://pdf.crutchfieldonline.com/ImageBank/v20200325141200/Manuals/136/136M7005_DL.PDF​

Check page 19 first, then 6-9, then 14-15. 19 displays the crossover and filter options available for the Front/Rear/Sub channels. Pages 6-9 reviews what those controls do, and Pages 14-15 contain charts displaying the voltages needed to match the gain/output needed for your sub and a chart with frequency ranges.

Typically you match the amp settings to the optimal ranges of your speakers. Best guess is that they missed the calibration phase of your install, but it's great to hear it's sounding better.

Before you adjust anything, you might want to take a picture of where the settings are now. Then, try to adjust one or two options at a time until you're happy with the sound.

Have fun with it!

Thanks! I’m going to give it a try next weekend for sure, I guess worst case scenario I can just set it back to what it was before I messed with it. Appreciate your help!

 

[VertigoTX]

I've read this entire thread over the last few days. Tons of great info here, thanks everyone.

My question I don't recall if it was answered in the last 77 pages...

If one had the Alpine premium system, can they use the PAC harness to run amplified front components and an additional sub, while leaving the sound bar speakers and the factory sub live as well?

Phrased another way... use the RCA outputs for front and sub channel from the PAC harness, while leaving the sound bar and factory sub alone and active too?

 

[Krondor]

I've read this entire thread over the last few days. Tons of great info here, thanks everyone.

My question I don't recall if it was answered in the last 77 pages...

If one had the Alpine premium system, can they use the PAC harness to run amplified front components and an additional sub, while leaving the sound bar speakers and the factory sub live as well?

Phrased another way... use the RCA outputs for front and sub channel from the PAC harness, while leaving the sound bar and factory sub alone and active too?

Yes.

 

[VertigoTX]

Yes.

Thanks for the confirmation

 

[Jkjones1]

This really is a great thread. I have the alpine 8.4” upgraded system. If i used the AMPRO AP4 interface, could I just add an amplifier to the existing speakers? If so, any thoughts on the benefits that would have on the sound Relative to the existing Alpine amp? I find the alpine system to be decent, but was thinking a different, more powerful amp, could bring the existing speakers to life a bit more and save me the hassle of disassembling the entire dash to replace the speakers, etc.

Sorry if this has already been asked- i couldn’t find thoughts on this specifically via the search, which could be due to it being a terrible idea!

Thanks in advance

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