Crossover for sub questions

[DemiSlayer]

Hi.

Im running a denon 4520ci receiver along with a Denon POA-2400 for the mains. I have 3 subs 2 identical. I am only currently only setting up 2 subs. I am thinking about picking up either a qsc-rmx2450 or yamaha p5000s/p7000s. Audyssey sets the LFE crossover to 120hz. should i employ an external crossover such as dcx-2496 or on board crossover of the p5000?

 

[TheWarrior]

Unless you are taking your own acoustic measurements, you are flying totally blind. The room is in control of what bass frequencies you can hear, both when and WHERE with in the room. And with out comprehensive acoustic measurements, you will have no idea how to influence the room modes so that you get all of the bass at all of the seats! Think that sounds complex? You're right!

Easiest thing to do is move those subs around until you feel the bass sounds consistent at each seat. If you can't find a way to do that, plug in the third. Still no? See if you can affordably add a fourth, ideally keeping as many identical subs as possible. Use your smart phone to get an SPL Meter so you can level match the subs using noise generated by the receiver in the speaker set up menu.

 

[lovinthehd]

Are you thinking the LPF of LFE of 120hz is a crossover? It isn't. Leave that alone

Your amp/mains you integrate with either Audyssey or an spl meter....judging by what you've posted I'd stick to Audyssey setup unless Denon sets your mains to large, I'd change them to small and start with a crossover of 80 to start.

 

[pewternhrata]

Unless you are taking your own acoustic measurements, you are flying totally blind. The room is in control of what bass frequencies you can hear, both when and WHERE with in the room. And with out comprehensive acoustic measurements, you will have no idea how to influence the room modes so that you get all of the bass at all of the seats! Think that sounds complex? You're right!

Easiest thing to do is move those subs around until you feel the bass sounds consistent at each seat. If you can't find a way to do that, plug in the third. Still no? See if you can affordably add a fourth, ideally keeping as many identical subs as possible. Use your smart phone to get an SPL Meter so you can level match the subs using noise generated by the receiver in the speaker set up menu.

Have any recommendations for an spl meter on a smartphone? I've tried a few, and each give different results (very similar, just a few dbs off). I know, what do I expect for free. Should note I have a note9 if that makes any difference.

 

[TheWarrior]

H

Have any recommendations for an spl meter on a smartphone? I've tried a few, and each give different results (very similar, just a few dbs off). I know, what do I expect for free. Should note I have a note9 if that makes any difference.

Honestly I haven’t tried any apps in years... just nabbed an analog meter instead!

That’s disappointing if especially for latest gen phones that they wouldn’t be at least somewhat accurate.

 

[pewternhrata]

H

Honestly I haven’t tried any apps in years... just nabbed an analog meter instead!

That’s disappointing if especially for latest gen phones that they wouldn’t be at least somewhat accurate.

I'm gonna guess the mixup is with the low end, considering how small the mics are on phones. They might have some frequency limit as well. What do you recommend for a meter on the cheap? (My phone worked wonders for the ultras, the rsl's not soo much) Overall im happy, but the volume on the subs can be sporadic at times.

 

[William Lemmerhirt]

H

Honestly I haven’t tried any apps in years... just nabbed an analog meter instead!

That’s disappointing if especially for latest gen phones that they wouldn’t be at least somewhat accurate.

Just dropping this in here for a little food for thought. This graph is a little older but illustrates the roll off points of two different phones. Point being, if it’s a free app, they may not have built in any consideration for the mics roll off, or FR deviations. Notice the bump at 6k on the android.
I would never trust an spl app that uses my phones mic.

I'm gonna guess the mixup is with the low end, considering how small the mics are on phones. They might have some frequency limit as well. What do you recommend for a meter on the cheap? (My phone worked wonders for the ultras, the rsl's not soo much) Overall im happy, but the volume on the subs can be sporadic at times.

I still use my trusty old rat shack(radio shack) meter, but Amazon has a few others for less than 30, and eBay probably has more for even less.