JL Slampak Questions

[Drift Away]

Thank you so much! I will change it next time I go out. Just so I’m clear, the gains screw should be at 3:00-9:00?

Turn it all the way counter clock wise then over to make it about flat. Might need to back it down a little if it sounds a little to hot.

 

[Drift Away]

My set up was pretty much just like yours.here is what it sounded like

 

[Julian]

Do you turn on any filters for the 6.5s? Are you saying set low pass on to 120hz?

 

[Drift Away]

Do you turn on any filters for the 6.5s? Are you saying set low pass on to 120hz?

Ill have to take a look at mine. I cant remember for the hi low pass. But i am pretty sure they are set at 120 hertz

 

[dnicholas47]

Not like you couldn’t already tell, but when it comes to this type of stuff I’m about at a Forrest Gump starting out on the shrimp boat level dumb. Any idea out of that mess of wires which one the sub would be vs the 6.5’s? I’ve been staring at that picture like a monkey doing a math problem.

 

[Drift Away]

Thats your sub

 

[dnicholas47]

I could lie and say that’s what I thought, but we’d both know that was BS. Last dumb question of the night I promise, should I do anything different to the tower amp, or just set them the same as the other speakers?

 

[Drift Away]

I could lie and say that’s what I thought, but we’d both know that was BS. Last dumb question of the night I promise, should I do anything different to the tower amp, or just set them the same as the other speakers?

Dont matter if they are they 6.5 towers or 7.7s 120 is about where they need to be for the JL stuff. Send me a DM if you have anyother question ill give you phone number over the weekend if you need anything else.

 

[adrianp89]

I can’t see much on my phone but I am going to have to respectfully disagree with drift away. At 80hz and 120hz you are leaving your self with 40hz gap at -12dB at best (maybe 24 on the JL)... that is a good chunk of music to be missing. I also think 3/4 gain is too high but if the voltage input is super low then it may be ok.

I would set for 80hz for best sound and 100hz if speakers start to struggle, but either way hpf and lpf should be set at same fq.

If you have a DMM I would just set the volume to 90% or volume 38 and follow this guide from JL to set the gains: https://jlaudio.zendesk.com/hc/en-us/articles/204374120-Amplifier-Level-Setting-Guide?mobile_site=true

That guide has test tones you could download to your phone and use as source. It also includes voltage targets for their amps and a YouTube video to follow.

 

[adrianp89]

Hard to tell but make sure all filters but subwoofer are on HIgh pass and sub is low pass.

Here is a good source on crossover basics and gives you an idea how the cut off works.

https://jlaudio.zendesk.com/hc/en-us/articles/226655828-Setting-Crossovers-?mobile_site=true