Any point to using the HU's Low Pass Filter...?

[Mr. Black 10+ year member]

I have my sub amp (RF T1001BD) crossed over @ ~80HZ. I was just wondering if there is any point to using the HU's crossover or should I simply leave it on the "full range" option? Thanks

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[Raven 10+ year member]

The only thing holding you back is preference. Try the HU's crossover and see if you like it better. Try both together and see if you like that. Experiment and find out what you like best.

 

[bri487 5,000+ posts]

i only run the ones on my amplifier. my decks processing is defeated.

 

[iceteebone 5,000+ posts]

doesn't matter. go with the one with the better slope or the easiest one to use. i personally use the one on my deck vs. the amp

 

[bri487 5,000+ posts]

doesn't matter. go with the one with the better slope or the easiest one to use. i personally use the one on my deck vs. the amp

i just have way more tuning capabilities with my amps, so my deck is defeated.

 

[Raven 10+ year member]

I'm constantly thinking "If I raised/lower the frequency to both the fronts and subs 5hz...". It would make a HU with active crossovers a godsend, but I can't afford that kind of thing.

 

[Justinw303 10+ year member]

Wouldn't, in theory, using both crossovers strengthen/raise the DB slope? I'm not exactly sure how crossovers work COMPLETELY, but say the HU has a 6 db slope and the amp has a 12 db slope, would they combine to create a 18 db slope? Just tryin to learn.

 

[El Ropo 10+ year member]

OK, this is my personal opinion on the issue.

How in the heck can you trust an analog pot to xover your subs at the exact frequency desired?

Answer: You can't.

Real solution, use the LPF on the HU for ACCURATE LPF. This way, you know the exact xover frequency, as opposed to GUESSING with an analog pot on the side of the amp. JMHO, but it's a solid hypothesis lol.

 

[stones 10+ year member]

OK, this is my personal opinion on the issue.
How in the heck can you trust an analog pot to xover your subs at the exact frequency desired?

Answer: You can't.

Real solution, use the LPF on the HU for ACCURATE LPF. This way, you know the exact xover frequency, as opposed to GUESSING with an analog pot on the side of the amp. JMHO, but it's a solid hypothesis lol.

Good point.

Thats always bugged me alittle, I wish amp manufacturers would put good accurate crossover with an adjustable slope from 12 to 24 db, I know a couple companys do on a few models I just wish it was more universal.

 

[VOA_NIGHTMARE 10+ year member]

Good point.Thats always bugged me alittle, I wish amp manufacturers would put good accurate crossover with an adjustable slope from 12 to 24 db, I know a couple companys do on a few models I just wish it was more universal.

I could do it on my kicker sx 1250.1 actualy was able to do way too much stuff.

 

[JimJ 5,000+ posts]

Wouldn't, in theory, using both crossovers strengthen/raise the DB slope? I'm not exactly sure how crossovers work COMPLETELY, but say the HU has a 6 db slope and the amp has a 12 db slope, would they combine to create a 18 db slope? Just tryin to learn.

Yes, that's how it works.

 

[bri487 5,000+ posts]

OK, this is my personal opinion on the issue.
How in the heck can you trust an analog pot to xover your subs at the exact frequency desired?

Answer: You can't.

Real solution, use the LPF on the HU for ACCURATE LPF. This way, you know the exact xover frequency, as opposed to GUESSING with an analog pot on the side of the amp. JMHO, but it's a solid hypothesis lol.

i have digital crossovers.

 

[Mr. Black 10+ year member]

OK, this is my personal opinion on the issue.
How in the heck can you trust an analog pot to xover your subs at the exact frequency desired?

Answer: You can't.

Real solution, use the LPF on the HU for ACCURATE LPF. This way, you know the exact xover frequency, as opposed to GUESSING with an analog pot on the side of the amp. JMHO, but it's a solid hypothesis lol.

Thats what I was thinking as well. My RF T10001BD is a great amp, but the xover is quite difficult to accurately set. I thought I had the amp crossed exactly @ 80, but when I adjusted the HU to 80 as well just for fun, there was indeed more bass (indicating I was somewhat off on my guess). I think I'll set the amp wide open and run the HU's xover.

 

[squeak9798 5,000+ posts]

Wouldn't, in theory, using both crossovers strengthen/raise the DB slope? I'm not exactly sure how crossovers work COMPLETELY, but say the HU has a 6 db slope and the amp has a 12 db slope, would they combine to create a 18 db slope? Just tryin to learn.

Combining a 6db slope and 12db slope wouldn't automatically create an 18db slope (the final slope depends on a lot of different factors).....but yes, they would "combine" and increase the slope of the crossover.

 

[squeak9798 5,000+ posts]

OK, this is my personal opinion on the issue.
How in the heck can you trust an analog pot to xover your subs at the exact frequency desired?

Answer: You can't.

Real solution, use the LPF on the HU for ACCURATE LPF. This way, you know the exact xover frequency, as opposed to GUESSING with an analog pot on the side of the amp. JMHO, but it's a solid hypothesis lol.

To the contrary......the exact frequency you are crossing over at doesn't really matter...at all. What does matter, is how the system sounds with the crossover set to where you have it set. Does it matter if it's 68hz or 82hz or 50hz? No, not at all. And due to most amplifiers having a continuously variable frequency (you can set it anywhere within a range...say 35hz to 200hz), and most HU's have very limited, specific frequencies you can select (most are around 50hz, 63hz and 80hz, and you can ONLY set to those specific frequencies), using the amplifiers crossover gives you far more adjustability in selecting the setting that SOUNDS best without being overly restricted to what frequencies you can select.

My hypothesis is more solid //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif