Got my JBL GTR-1001

[2RZ-FE 10+ year member]

The FREQ dial, the 80hz marking is at this location on my amp. I saw pics online that show the same as mine but others show the 80hz marking being on the left. Going by the 32-320 markings, 144hz should be at 12 o clock so 80hz should be slightly more than half way between 32 and 144 right? Can I just turn it to 320 and use the 90hz low pass on my deck instead? 

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[2RZ-FE 10+ year member]

 

[youdoofus]

The FREQ dial, the 80hz marking is at this location on my amp. I saw pics online that show the same as mine but others show the 80hz marking being on the left. Going by the 32-320 markings, 144hz should be at 12 o clock so 80hz should be slightly more than half way between 32 and 144 right? Can I just turn it to 320 and use the 90hz low pass on my deck instead? 

yes. you should run full range on the amp and use the much more exact filter on the h/u

 

[2RZ-FE 10+ year member]

So all the way clockwise would essentially make it full range similar to if it had a full/lp/hp switch? I heard of doing that but wasn’t sure of the results. My Kenwood goes down to 85hz

 

[THATpurpleKUSH 5,000+ posts]

Keep the filter on the amp all the way open and use the filter on the headunit. Using both yields a steeper slope and it won't blend as well.

 

[youdoofus]

Keep the filter on the amp all the way open and use the filter on the headunit. Using both yields a steeper slope and it won't blend as well.

yep, you dont wanna run the amps xover after the deck already did that work for it

 

[BOOMINGRANDPA 5,000+ posts]

yeah 1/2 way would be like 176hz.. just use deck xover easier anyway

 

[2RZ-FE 10+ year member]

Set the amp freq all the way to 320hz and set the deck to 83hz. The bass seems louder this way rather than setting the deck set to THROUGH and amp set to around 80. Is this normal? 

 

[Mitchc1113]

How do you like this amp? I have it myself and think it's awesome for the price. Did you get it from crutchfield for the discount price? It does more than rated power- just like all the other JBL amps I've run in the past. Back in 2002 I had a JBL BP1200.1, that thing was awesome.

Here's a link to the dyno results for the Infinity Kappa K1000 which is essentially the exact same amp.



Shows what kind value your getting. No SS filter or bass knob, but as long as you know how to set your filters/gain on your amp/hu or dsp properly than theres really no need for either. 

Clean power, more than rated power for great price. That's what I want from my class D amp. Just wish they made a 2000 watt version...

 

[2RZ-FE 10+ year member]

Yeah I got it from Crutchfield for $179. I have it powering a Pioneer 3003 12” in a 1.5cf sealed box at the moment. Have the gain all the way down and it still seems a tad much at times so I have to adjust the sub volume control down on the head unit. Nice to have some headroom. Had a BP600.1 back then somehow it shorted out.

The 80hz marking at 1 o clock is the correct spot. The 11 o clock one is from a prototype amp. This is from JBL. 

 

[Foxxxycoxxxy]

Keep the filter on the amp all the way open and use the filter on the headunit. Using both yields a steeper slope and it won't blend as well.

All the way open means turn it clock wise all the way right ?

 

[2RZ-FE 10+ year member]

setting to 320 may set it to full but dont think it disables the slope curve...