I'm always hungry for bass, I intent to add a third sub to my existing HT system to get more for bass.

But I've been told a BEHRINGER Ultragraph Pro FBQ3102 Equalizer can do just what I want to get more bass boom out of my 2 subs SVS PB2-ULTRA (2x 12" drivers) and Velodyne model F-1500BF (15" Driver), both are active subs.

So I end up bought this Behringer FBQ3102.

Now before I hook this up to my 2 Subs, I need some help:

1. Will I get what I want, the "more powerful" bass out of my 2 Subs with this Behringer?

2. How I should hook it up? Through sub out put or using the 2 mono channels equalizer to each of the 2 subs?

3. What is the setting (each frequency equalizer and parameter) to get what I wish for?

4. How I should set the parameters at 2 subs?


THANKS for all inputs and suggestions. :)

You are going to have to define "more" for us. I mean with the three subs you have unless you live in a cathedral you should have more than enough output.

You might try looking in the Behringers thread also. Lots of good info there.

Bill3508

You won't get 'more powerful' bass per se, what you will get is the ability to remove any nasty peaks in your response curve which will make what bass you do have much cleaner and even sounding. I had a giant 40hz peak in my room which once removed via my Velodyne SMS-1 made a huge difference in bass response. I aslo have two subs.

You won't get 'more powerful' bass per se, what you will get is the ability to remove any nasty peaks in your response curve which will make what bass you do have much cleaner and even sounding. I had a giant 40hz peak in my room which once removed via my Velodyne SMS-1 made a huge difference in bass response. I aslo have two subs.Agreed. EQ can make your bass seem more powerful. I am in almost exactly the same boat as deneb, and smoothing out the peak with my SMS-1 gave the lower bass a new vibrancy, bringing the entire system to life.

You are going to have to define "more" for us. I mean with the three subs you have unless you live in a cathedral you should have more than enough output.

John, how should I say, I feel my two subs is not loud enough, when I compare to my (small) HT in a box in my living room or bass boom of audio in some of my friend cars.

No matter how I tweak the cross over and volume at two subs, it sound just not powerful enough to bring out the low bass. Well not to my expectation at least. :confused:

You won't get 'more powerful' bass per se, what you will get is the ability to remove any nasty peaks in your response curve which will make what bass you do have much cleaner and even sounding. I had a giant 40hz peak in my room which once removed via my Velodyne SMS-1 made a huge difference in bass response. I aslo have two subs.

How you hook up the Behringer in your system?
Through 2 channel outputs or one Sub output by using a "T" RCA splitter?
Thanks

You might try looking in the Behringers thread also. Lots of good info there.

Bill3508

Any specific one, Bill? Thanks

John, how should I say, I feel my two subs is not loud enough, when I compare to my (small) HT in a box in my living room

Huh? Must be something wrong with your 2 subs.....

or bass boom of audio in some of my friend cars.


You gotta compare apples to apples......Car subs are often tuned higher and most music doesn't achieve as low as 20-30hz. How many subwoofer watts in your friend's car in such a small area????

Huh? Must be something wrong with your 2 subs.....




You gotta compare apples to apples......Car subs are often tuned higher and most music doesn't achieve as low as 20-30hz. How many subwoofer watts in your friend's car in such a small area????

Have you experienced a car stoping at you side and hear that deep bass migrate or vibrate into your car? That kind of bass (boom). of course I will not turn my HT to travelling subs. I just want a bit more bass out of my existing set up, is this possible by including a Behringer FBQ3102? :D

Have you experienced a car stoping at you side and hear that deep bass migrate or vibrate into your car? That kind of bass (boom). of course I will not turn my HT to travelling subs. I just want a bit more bass out of my existing set up, is this possible by including a Behringer FBQ3102? :D

You're just looking for pure SPLs and low soundquality if you're wanting car sub SPLs in your house. How big is your room? Unless your room is aorund 10,000 cu ft I don't see why those 2 subs should give you a problem with SPLs. Are your subs colocated? Where are they placed?

Ahem...room acoustics people. Get ye some bass traps. Chances are you are running into some serious cancellation and nodal issues at the seats. Seems totally counterintuitive, but by absorbing bass, you can get MORE bass where you sit. There are plenty of good bass trap products out there and DIY'ing them is flat out easy. You can EQ all you want but short of putting gargantuan amounts of horsepower into the room and then using an EQ to cut everything down to the bottom of the lowest response dip, doing some simple bass trapping will be your biggest bang for the buck.

As for the FBQ-3102, it is a decent EQ but it doesn't have the narrow bandwidth or resolution you need to properly EQ an LFE system. The ones you want are the DSP-1124 (aka the infamous BFD), or the later version DEQ-2496 or DCX-2496 (which has the advantage of programmable delays in each channel so you can properly time the arrivals of each sub). All three have a very flexible, very definable multi-band parametric EQ section in them that allows you to pick a very specific frequency and notch it out using a very narrow bandwidth filter. If you don't want to go thru the trouble, get a Velodyne SMS-1. The SMS-1 isn't as flexible, but it is plug and play and can handle multiple subs.

Soundgood give sound advice. I'd say bass traps combined with EQ will likely give you the bass you crave, without the undefined boom of car subwoofer bass.

You're just looking for pure SPLs and low soundquality if you're wanting car sub SPLs in your house. How big is your room? Unless your room is aorund 10,000 cu ft I don't see why those 2 subs should give you a problem with SPLs. Are your subs colocated? Where are they placed?

My room size is about 17' x 27' x 9.5' ceiling = 4,360 cu feets.

I place the SVS sub (down firing) in front center and the Velodyne (front firing) at right rear corner next to the surround speaker.

You've got plenty of sub for your room, it really sounds like you're dealing with placement and room issues. I'd spent some time experimenting with placement, phase, ect. I'd also suggest getting either a Velodyne SMS-1 (so you can see the effects of placement and phase adjustments in real time) or other software to evaluate the response of your room. Time to start researching room treatments as well.

You could even start by only running one sub in a corner, see what kind of output you get, then add the second sub in the same location. From there move one sub to a different location and see how they both sound when in different locations.

John, how should I say, I feel my two subs is not loud enough, when I compare to my (small) HT in a box in my living room or bass boom of audio in some of my friend cars.

No matter how I tweak the cross over and volume at two subs, it sound just not powerful enough to bring out the low bass. Well not to my expectation at least. :confused:

Copy. OK then what you have is, apparently, the upper-mid bass emphasized over the deep bass. First of all, because you are mixing two different brands, make sure they are all in phase. You might find the Velo fighting ths SVS's if they are out of phase. One sure way of checking this would be to disconnect either the two SVS's or the Velo and see what happens.

Beyond that, all I can think of is room placement issues. You certainly have very good and powerful subs.

EQ and bass traps will improve SQ, but if he really wants what he says, "deep bass (like that which) migrate(s) or vibrate(s) (from another vehicle) into your car? That kind of bass (boom)," I'm not sure improved SQ is what he's after.

What he describes would be readily accomplished by accentuating the kind of 40-60Hz nodes others of us strive to eliminate. :eek: He certainly can create that boomy kind of sound easily enough with an EQ. But maybe what he should do is trade his SVS and Velodyne for four cheap (boomy) subs. :rolleyes:

Actually, the two subs may be smoothing out the FR by canceling nodes, as is often the case. Trying just one, as John F. Palacio suggested, may restore some of the boom and provide a sound the OP finds more pleasing. Trying different locations and/or tinkering with the phase controls might result in reinforcement of the desired frequencies as well. A listening position near a wall can also possibly add a boomy sensation, if that alternative is feasible.

You need to change their positions and get some room treatments. An EQ too, if you got the money.

EQ and bass traps will improve SQ, but if he really wants what he says, "deep bass (like that which) migrate(s) or vibrate(s) (from another vehicle) into your car? That kind of bass (boom)," I'm not sure improved SQ is what he's after.

What he describes would be readily accomplished by accentuating the kind of 40-60Hz nodes others of us strive to eliminate. :eek: He certainly can create that boomy kind of sound easily enough with an EQ. But maybe what he should do is trade his SVS and Velodyne for four cheap (boomy) subs. :rolleyes:

Actually, the two subs may be smoothing out the FR by canceling nodes, as is often the case. Trying just one, as John F. Palacio suggested, may restore some of the boom and provide a sound the OP finds more pleasing. Trying different locations and/or tinkering with the phase controls might result in reinforcement of the desired frequencies as well. A listening position near a wall can also possibly add a boomy sensation, if that alternative is feasible.


ditto

Car audio bass is not really held up as the ideal for home theater enthusiasts to achieve with their subwoofers. This is because car audio bass emphasizes pure SPL over quality, and they can get away without worrying about under 20-30hz. For impressive HT bass, you do want to worry about sub-30hz as well as infrasonics, as this is where the truly quality subwoofers prove themselves. Run a frequency sweep for your subwoofer at reference levels and see what sort of SPL readings you get from the primary listening position and get back to us with the numbers.

Then again, if you're striving to achieve car audio-like performance for your home theater, you might just have a "different" taste for bass.

Nah, theres nothing wrong with finding things to be desired from a car audio system. First of all, it is a bunch of crap to think that the bass doesn't sound good in a car, some of my friends have TCSounds drivers in their cars and I absolutely covet the deep bass SQ they get. Sure theres a lot of idiots that just dumped their refund checks at BIG PAPA's car audio and now have a system that rattles more than it booms, but that isn't always the case. Personally I am going for a system in my HT that will make most car guys crap themselves, but that involves 8 18" subs and close to 20KW of amp power. BTW, my room is 3,000^3'.

Some of the others got to it before I did, yes your subs are canceling each other out, you most likely have one of the SVS's firing out of phase (partially or fully) and need to correct that either with polarity, time delay or room placement. Have you tried stacking the subs on top of each other? This is great place to start.

Nah, theres nothing wrong with finding things to be desired from a car audio system. First of all, it is a bunch of crap to think that the bass doesn't sound good in a car, some of my friends have TCSounds drivers in their cars and I absolutely covet the deep bass SQ they get. Sure theres a lot of idiots that just dumped their refund checks at BIG PAPA's car audio and now have a system that rattles more than it booms, but that isn't always the case. Personally I am going for a system in my HT that will make most car guys crap themselves, but that involves 8 18" subs and close to 20KW of amp power. BTW, my room is 3,000^3'.

Some of the others got to it before I did, yes your subs are canceling each other out, you most likely have one of the SVS's firing out of phase (partially or fully) and need to correct that either with polarity, time delay or room placement. Have you tried stacking the subs on top of each other? This is great place to start.

WOOW! 8 x 18" subs, how you do that, in one big giant box, can you share with us?

Thanks to all inputs, I am learning my lesson here.

If you're only concerend about SPL and Boom, then maybe you should just sell your SVS and Velodyne and invest it in a wall of those 18 inch Cerwin Vega Horn bass cabinets and a powerful amp. I believe those things are used at concerts and raves.

If you're only concerend about SPL and Boom, then maybe you should just sell your SVS and Velodyne and invest it in a wall of those 18 inch Cerwin Vega Horn bass cabinets and a powerful amp. I believe those things are used at concerts and raves.

That is a good suggestion. Thanks

I don't know about how the cerwin vega but I have a pair of 18 inch horn subs that sound better than my SVS I used to have and puts out much more spl.

They used to use a system of Cerwin Vega folded horn subwoofers in some movie theaters in the 70's, most notably to showcase the movie "Earthquake" to simulate vibrations from low frequencies. But most units were later dismantled due to structural damage caused by the vibrations.

That's the info I got from wikipedia. I guess thats the reason why you mostly only see them in club/concert settings. Cerwin Vega popularized the use of the horned subwoofer but theres many other brands as well. I guess if you want to totally pressurize your room, displacement, large woofers, and kilowatts are the only way to go, but be sure to reinforce your room! Maybe invest in a few of the Aurelex Grand Gramma's too to tame vibrations unless you like the idea of seeing your couch race against your cofee table!

You can always turn them down, I hit 130 db's and it feels awesome. They are huge, ugly and very fast, They can run 30 mph, just kidding. They do hit fast and hard. I would recommend these to the op and for the money of what he has now he could get 10 of these. He would need alot of space though. Of course he won't need that many. Seriously though he is probably experiencing room cancellation. SVS makes some good subs as well as velodyne.

I don't know about how the cerwin vega but I have a pair of 18 inch horn subs that sound better than my SVS I used to have and puts out much more spl.

Yes, I heard many people have it too.

How it works? Did you build it yourself, and how you drive it? Can you be more specific, technically?

I might build myself one of those too. Must be very exciting and experimental to do that. :rolleyes:

THANKS

WOOW! 8 x 18" subs, how you do that, in one big giant box, can you share with us?

Thanks to all inputs, I am learning my lesson here.


Lol, no they aren't in one giant box, if they were, it would be over 50 cubic feet and weigh about 2,000lbs. What I am planning on doing is 8 x RL-p18's each in their own 7cubic foot enclosure powered with an EP2500.

iwanrs,
They are commercial pro subs from Madison. Very inexpensive, but, very big and carpeted, not for a family room. I use a Samson S-2000, 2 would be better. I paid $1050 for 2 including the used amp which retailed for $1000 by itself.