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Discussion Starter #1
Update: I am buying a Behringer EP4000, along with a minidsp and a behringer ecm8000 mic for tuning to my room. I still need to decide on box size, box type, and drivers. Forsure only one box, 1 or 2 drivers in the box. Approximately 400 dollar budget on drivers.


I am probably going to buy a 1300W RMS amp, the Behringer EP2000. I need a sub for home theatre that will go with this. I want strong low frequencies for nice rumble for explosions etc. I am thinking a 15". What do you guys suggest? Also if there is a better amp for the money let me know
Also one other thing, I can just use the pre-out on my avr and use a RCA to XLR converter for the input into the EP2000 correct? I read a couple people had problems with their impedance on their output from their avr's because the voltage was too low or something and it was too quiet?


Also, any advice on what type of box and box design? I guess this will depend on what driver I pick. The size of the box im thinking of is at max 20" deep doesnt matter how high or wide.
 

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Quote:
Originally Posted by WagBoss  /t/1417983/looking-for-a-sub-to-go-with-a-behringer-ep2000-amp-1300w-rms#post_22176417


I am probably going to buy a 1300W RMS amp, the Behringer EP2000. I need a sub for home theatre that will go with this. I want strong low frequencies for nice rumble for explosions etc. I am thinking a 15". What do you guys suggest? Also if there is a better amp for the money let me know
Also one other thing, I can just use the pre-out on my avr and use a RCA to XLR converter for the input into the EP2000 correct? I read a couple people had problems with their impedance on their output from their avr's because the voltage was too low or something and it was too quiet?
hmmm odd id find the driver first than go find the amp lol. I can't tell from your post but it sounds like your looking for a passive sub? Budget?


I use a rca to xlr with no probs. Got mine at monoprice


Sent from my SCH-I405 using Tapatalk 2
 

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Discussion Starter #3
Budget I'd say is in the 400 ish range willing to go a bit under or above depending. Yes looking for a passive sub
 

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Discussion Starter #4
One other option is I could run it in 2-channel mode, which has a power output of 2x500W RMS, so I could run something like 2 x12" subs or whatever is best at 500W each.
 

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Discussion Starter #6

Quote:
Originally Posted by Jay1  /t/1417983/looking-for-a-sub-to-go-with-a-behringer-ep2000-amp-1300w-rms#post_22177272


You might as well spend the extra $60 on an EP4000. How big is your room?

haha mideswell. its like a split kitchen/living room, so total would be about 30 feet long 10 feet wide and 9 feet high. the living room and kitchen are separated by two pieces of wall that stick out 2 feet and 3 feet so there is a "doorway" that is 9 feet high and about 5 feet wide. the living room area is probably only about 10 feet wide x 14 feet long x 9 feet high though. I am moving in a year or two though. I just want deep bass to shake my house



So with the EP4000 I could put two 4 ohm subwoofers in series and power them with a bridged 1750 watts... wow. so i would be looking for two subs that are 4 ohm and have like 900-1000 watts rms each?
 

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Quote:
So with the EP4000 I could put two 4 ohm subwoofers in series and power them with a bridged 1750 watts
Yes but you won't get that much power. Look back at the amp testing thread. The EP-2500/4000 can only put out about 800w per channel at 2 ohms stereo or 1,600 bridged into 4 ohms.
Quote:
so i would be looking for two subs that are 4 ohm and have like 900-1000 watts rms each?
Depends on the enclosure. You can easily destroy a sub rated at 2,000w with much less power.
 

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Discussion Starter #8

Quote:
Depends on the enclosure. You can easily destroy a sub rated at 2,000w with much less power.

so what type of enclosure would i use if i want say 2 15" subs one facing out front one facing out left? Sealed?
 

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I would have the two drivers facing forward or two separate enclosures. With separate enclosures you can place them in various parts of the room to get the best frequency response. If you have a big room then 2 sealed 15" subs may not be enough. If you can go with a larger enclosure then 2 ported subs will be a lot louder.
 

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Discussion Starter #10

Quote:
Originally Posted by Mrkazador  /t/1417983/looking-for-a-sub-to-go-with-a-behringer-ep2000-amp-1300w-rms#post_22178352


I would have the two drivers facing forward or two separate enclosures. With separate enclosures you can place them in various parts of the room to get the best frequency response. If you have a big room then 2 sealed 15" subs may not be enough. If you can go with a larger enclosure then 2 ported subs will be a lot louder.

Would it be better then 1 driver ? such as a http://www.parts-express.com/pe/showdetl.cfm?Partnumber=293-662
 

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Quote:
Originally Posted by WagBoss  /t/1417983/looking-for-a-sub-to-go-with-a-behringer-ep2000-amp-1300w-rms#post_22177448


haha mideswell. its like a split kitchen/living room, so total would be about 30 feet long 10 feet wide and 9 feet high. the living room and kitchen are separated by two pieces of wall that stick out 2 feet and 3 feet so there is a "doorway" that is 9 feet high and about 5 feet wide. the living room area is probably only about 10 feet wide x 14 feet long x 9 feet high though. I am moving in a year or two though. I just want deep bass to shake my house


So with the EP4000 I could put two 4 ohm subwoofers in series and power them with a bridged 1750 watts... wow. so i would be looking for two subs that are 4 ohm and have like 900-1000 watts rms each?

That's a decent sized room, you will definitely want to start out with a ported sub. That also means you are going to need a HPF in your front end, since the behringer amp only has a selectable 30/50hz option. Going with one really expensive driver like the TC 15" is an option of course, but that doesnt leave your budget room for a MiniDSP , which will give you complete control over a HPF, and allow you to EQ the room response flat. You could build a pair of subs like


Dual opposed Infinity 1260W's in 8ft3 tuned to 20hz, wired for 2ohm. Each dual opposed sub will handle the 800 watts per channel from an EP4000 running 2ohm stereo
http://www.amazon.com/Infinity-Reference-1260w-1200-watt-High-Performance/dp/B0028AVGEO/ref=sr_1_4?s=automotive&ie=UTF8&qid=1341023902&sr=1-4&keywords=infinity+subwoofer


A single DVC385 in the same 8ft3 20hz, powered by 600 watts per channel from the EP4000 running 4ohm stereo
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-190


The performance is extremely close, with the dual 12's having a little more output.
 

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Discussion Starter #12

Quote:
Originally Posted by Jay1  /t/1417983/looking-for-a-sub-to-go-with-a-behringer-ep2000-amp-1300w-rms#post_22179260


That's a decent sized room, you will definitely want to start out with a ported sub. That also means you are going to need a HPF in your front end, since the behringer amp only has a selectable 30/50hz option. Going with one really expensive driver like the TC 15" is an option of course, but that doesnt leave your budget room for a MiniDSP , which will give you complete control over a HPF, and allow you to EQ the room response flat. You could build a pair of subs like

Dual opposed Infinity 1260W's in 8ft3 tuned to 20hz, wired for 2ohm. Each dual opposed sub will handle the 800 watts per channel from an EP4000 running 2ohm stereo
http://www.amazon.com/Infinity-Reference-1260w-1200-watt-High-Performance/dp/B0028AVGEO/ref=sr_1_4?s=automotive&ie=UTF8&qid=1341023902&sr=1-4&keywords=infinity+subwoofer

A single DVC385 in the same 8ft3 20hz, powered by 600 watts per channel from the EP4000 running 4ohm stereo
http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-190

The performance is extremely close, with the dual 12's having a little more output.

Not sure what you mean about a HPF, I am using the LFE from my avr, so it's only sending the low frequncies to the amplifier. And the crossover on my receiver would split the higher frequencies to my fronts. I would not use the 30/50 hz option. Is it really that important to have a DSP?


How exactly would I wire the dual infinity subs? They appear to be 4 ohms, so if I ran them as stereo off the amp then they would only be 4 ohms, for them to be 2 ohms I would have to run them parallel off the bridged output, but the bridged output doesnt do 2 ohm. Did you mean to wire them in series and run them as 8 ohms from the ep4000 bridged at 1750 watts rms? Wouldnt the 1750 watt rms be way too much for the 300 w rms of the infinity sub?
 

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HPF = high pass filter. A ported sub will unload below its tuning point. If you're dumping 100s of watts into a sub playing high level low frequency content (action movies), you can potentially destroy the woofers without a filter to remove the content below tune.


A dual opposed sub means 2 woofers in a single sub, you would build a pair of these subs, 4 woofers total. Wire each set of 4ohm woofers in parallel for a 2ohm load. 4 woofers is $240, the DSP is $125, so $365 for the setup.

 

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Discussion Starter #14

Quote:
Originally Posted by Jay1  /t/1417983/looking-for-a-sub-to-go-with-a-behringer-ep2000-amp-1300w-rms#post_22179332


HPF = high pass filter. A ported sub will unload below its tuning point. If you're dumping 100s of watts into a sub playing high level low frequency content (action movies), you can potentially destroy the woofers without a filter to remove the content below tune.

A dual opposed sub means 2 woofers in a single sub, you would build a pair of these subs, 4 woofers total. Wire each set of 4ohm woofers in parallel for a 2ohm load. 4 woofers is $240, the DSP is $125, so $365 for the setup.

Yes I know HPF is a high pass filter, what I'm saying is the signal I am sending to the amp would be the LFE subwoofer pre-out from my receiver, which would only send 0-120 hz in the first place.


So you are saying that a DSP is a must? Why do pre-built subs from speaker manufacturers not recommend DSPs or anything? What content below tune would I remove on the subwoofer? Like are you saying remove 0-10 hz else it will wreck the sub? The receiver is already removing the high frequencies and only sending the low frequencies to the sub.


Also I drew a picture of my room. It is hard to explain it.

 

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Quote:
Originally Posted by WagBoss  /t/1417983/looking-for-a-sub-to-go-with-a-behringer-ep2000-amp-1300w-rms#post_22179347



Yes I know HPF is a high pass filter, what I'm saying is the signal I am sending to the amp would be the LFE subwoofer pre-out from my receiver, which would only send 0-120 hz in the first place.

So you are saying that a DSP is a must? Why do pre-built subs from speaker manufacturers not recommend DSPs or anything? What content below tune would I remove on the subwoofer? Like are you saying remove 0-10 hz else it will wreck the sub? The receiver is already removing the high frequencies and only sending the low frequencies to the sub.

Yes the reciever is putting a low pass filter on the sub and sending it everything down to 0...




Here you see the sub in question's cone excusion with 800 watts, one line has a 20hz HPF, the other has no filter. As you can see, by 16hz this sub is at 24mm excursion, which is likely over the mechanical limit of the driver. If you do not believe there is heavy content at 16hz and below.... good luck.
 

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Discussion Starter #16

Quote:
Originally Posted by Jay1  /t/1417983/looking-for-a-sub-to-go-with-a-behringer-ep2000-amp-1300w-rms#post_22179369


Yes the reciever is putting a low pass filter on the sub and sending it everything down to 0...


Here you see the sub in question's cone excusion with 800 watts, one line has a 20hz HPF, the other has no filter. As you can see, by 16hz this sub is at 24mm excursion, which is likely over the mechanical limit of the driver. If you do not believe there is heavy content at 16hz and below.... good luck.

edit: nvm I misread your post. Thank you for the graph. What program did you use for the excursion graph?


and is there any difference between the minidps 2x4 and the minidsp 2x4 kit? Other than the fact that the kit does not have a cover? It is 25 dollars cheaper.
 

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Discussion Starter #18
does anybody else recommend any other drivers? I think I want to stick with only 1 box right now I have decided don't have room for 2 really.
 

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Quote:
Originally Posted by Jay1  /t/1417983/looking-for-a-sub-to-go-with-a-behringer-ep2000-amp-1300w-rms#post_22179517


The program is WinISD. You should shoot the minidsp people an email with anything you need to find out as far as specifics like that.

Do you know what "vent length" means in winisd? i am using a circular port so is it just how long the cardboard tube goes into the subwoofer? Also, I will be putting my sub in a corner with 2 subs facing out on the same side, will I port it only once and port it on the front?


One last question, what determines tuning frequency? Is it something I can control or how does that work? Thanks
 

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Yes, vent length is the total length of the port. You can use a single port for dual woofers, it is best to center the port between drivers, but not mandatory. The port diameter and length in a given enclosure volume determine tuning frequency.
 
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