Amp for 4 cuft flat pack with 12" Ultimax sub - AVS Forum
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post #1 of 24 Old 06-24-2013, 06:18 PM - Thread Starter
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Hey guys, i ordered the 4 cuft flat pack from diysoundgroup with the 12" Dayton Ultimax sub. What I'm looking for is some advice on what amp to pair with it. Would the 300 Watt Bash plate amp be sufficient, or would the 500 Watt Bash plate amp be better for this application? I would be open pro style amps, but I doubt that I would be adding an additional amp down the road so I'm not sure if I would gain the benefit of going with a pro style amp. Thanks
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post #2 of 24 Old 06-24-2013, 07:32 PM
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Either model ok...i assume you mean the ported box? depends on what you want it tuned too...i tried 20hz on both with a 18hz hpf. You should get winisd or bassbox and model it and see what you like.
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post #3 of 24 Old 06-24-2013, 07:34 PM
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Go with pro amps. The Crown XLS amps are a lot of bang for the buck.

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post #4 of 24 Old 06-25-2013, 03:48 AM
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A Behringer NU1000DSP would suffice for a single sub and has DSP HPF (down to 20 Hz) and parametric equalization to tame nasty peaks. RMS power is 750 W bridged into 4 ohm load. Cost is pretty low.

Current Gear: PJ – BenQ PE7700; Receiver - Onkyo TX-SR805; Blu Ray - OppoBDP 103; Turntable - Dual CS-515 w/ Ortofon Super OM10; Amplifiers - OdysseyKhartago, Adcom GFA555, QSC RMX 1850HD; PEQ - Behringer FBD2496 [Near FieldSub], miniDSP 2×4 [Flanking Subs], REW; Speakers - 4 Pi (w/B&C DE250/JBL2226H) × 3 [LCR], Yamaha Crap × 2 [surrounds], Exodus Audio Maelstrom-X18" sealed sub [near field sub], LAB-12 based ported sub tuned to 22 Hz x2 [flanking subs, XO set at 40 Hz]
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post #5 of 24 Old 06-25-2013, 09:35 AM
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I'd go with a pro amp

Panny 65st60 / Denon X1000 / EMP e55ti / EMP e56ci / EMP e5bi / (2) e1010i
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post #6 of 24 Old 06-25-2013, 07:30 PM - Thread Starter
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Yes, I'm talking about the ported box. I didn't realize it could be tuned further, I assumed it was tuned to what it was based on the size of the box and the size/number of ports. For the money, the 300 Watt Bash amp at $119 or the 500 Watt Bash amp at $199 are a lot more attractive than the cheapest Crown ($249 for the XLS 1000) or $299 for the NU1000DSP. In my opinion, I would need a compelling reason to fo with either of the pro amps at this point. Thanks
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post #7 of 24 Old 06-25-2013, 10:32 PM
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Quote:
Originally Posted by BigSlade View Post

Yes, I'm talking about the ported box. I didn't realize it could be tuned further, I assumed it was tuned to what it was based on the size of the box and the size/number of ports. For the money, the 300 Watt Bash amp at $119 or the 500 Watt Bash amp at $199 are a lot more attractive than the cheapest Crown ($249 for the XLS 1000) or $299 for the NU1000DSP. In my opinion, I would need a compelling reason to fo with either of the pro amps at this point. Thanks
Isn't the XLS1000 2 channels, or $125/ch as opposed to $199/ch for the Bash 500W? Plus you get the DSP in the XLS.
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post #8 of 24 Old 06-26-2013, 07:46 AM
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Quote:
Originally Posted by darrellh44 View Post

Isn't the XLS1000 2 channels, or $125/ch as opposed to $199/ch for the Bash 500W? Plus you get the DSP in the XLS.

The DSP in the either of the two amps is a great reason consider those. A separate DSP like the MiniDSP will run you at least an extra $100. Additionally, you get two separate channels per amp. You can bridge them for more power or add a second sub to help with your frequency response.
Ultimately it'll be your choice what is going to be best for your situation and a plate amp might be that right now. However, many people who really get into this as a hobby, will outgrow plate amps and move up into pro-amps as they need more power or additional features like DSP. I currently have four plate amps sitting in my garage.

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post #9 of 24 Old 06-26-2013, 11:40 PM
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My only concern about pro amps like the Behringer is that, from what I've read, the fan in them can be noisy. If you have the luxury to put them someplace out of the way then no problem. But in my application, it will be sitting out in the open near the sub. Don't know if there is a good (quite) option with respect to pro amps.
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post #10 of 24 Old 06-27-2013, 02:33 AM
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You can replace the fan with a quieter one or modify the shroud.

 

http://www.hometheatershack.com/forums/subwoofer-amps-high-pass-filters/52124-behringer-inuke-nu1000-amp-amplifier-fan-swap-how-w-pics.html

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post #11 of 24 Old 06-27-2013, 05:01 AM
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Quote:
Originally Posted by BigSlade View Post

Yes, I'm talking about the ported box. I didn't realize it could be tuned further, I assumed it was tuned to what it was based on the size of the box and the size/number of ports. For the money, the 300 Watt Bash amp at $119 or the 500 Watt Bash amp at $199 are a lot more attractive than the cheapest Crown ($249 for the XLS 1000) or $299 for the NU1000DSP. In my opinion, I would need a compelling reason to fo with either of the pro amps at this point. Thanks

+1 to the other posts pointing out the benefits and convenience of amps with full-fledged DSPs.

Frankly, a subwoofer rarely needs a relatively powerful DSP like a MiniDSP. A couple-three parametric sections and a high pass filter go a long way for a subwoofer.

Not all DSPs are the same. Crown XLS series amps seem to have primarily integrated crossovers which most of us already have in our AVRs. Crown Xti series amps get the full boat DSP treatment.
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post #12 of 24 Old 06-27-2013, 04:07 PM - Thread Starter
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So if I'm wanting to go with something with a DSP, I'm looking at probably the cheapest option of the NU1000DSP at $299 at an online retailer, or rolling the dice and buying something off of eBay. While I don't doubt that I could benefit from the DSP, I'm just not sure it's worth the extra cost (I'm already pretty much over budget with the 500 Watt Bash).
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post #13 of 24 Old 06-27-2013, 05:21 PM
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Have you priced the NU1000? I believe its about $100 less than the model with DSP.

Current Gear: PJ – BenQ PE7700; Receiver - Onkyo TX-SR805; Blu Ray - OppoBDP 103; Turntable - Dual CS-515 w/ Ortofon Super OM10; Amplifiers - OdysseyKhartago, Adcom GFA555, QSC RMX 1850HD; PEQ - Behringer FBD2496 [Near FieldSub], miniDSP 2×4 [Flanking Subs], REW; Speakers - 4 Pi (w/B&C DE250/JBL2226H) × 3 [LCR], Yamaha Crap × 2 [surrounds], Exodus Audio Maelstrom-X18" sealed sub [near field sub], LAB-12 based ported sub tuned to 22 Hz x2 [flanking subs, XO set at 40 Hz]
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post #14 of 24 Old 06-27-2013, 05:49 PM - Thread Starter
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It's running the same price of the 500 Watt Bash, but unless i'm just missing something I don't really see much of a benefit of going with that, unless it is just a better amp than the Bash.
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post #15 of 24 Old 06-27-2013, 10:00 PM
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You need some method to apply a HPF or you will destroy your driver at low freq excursion in a ported sub.

The Berlinger amp fan mod really is easy, takes 30 min total, and the quiet fan is $12


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post #16 of 24 Old 06-28-2013, 08:25 PM - Thread Starter
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Ok, so I've been trying to figure out if the NU1000 or the XLS 1000 offers a HPF. I honestly can't make heads or tails of it, so any help would be appreciated. Thanks
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post #17 of 24 Old 06-28-2013, 08:31 PM
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The DSP version of the inuke has a high pass filter but the lowest it can go is 20hz.
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post #18 of 24 Old 06-28-2013, 08:37 PM - Thread Starter
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So realistically, to get a get pass filter i would have to step up another $100 or so. If I'm not running the sub insanely hot, how much do I have to worry about destroying my driver? What about if I'm driving it with less power? Say only using one channel of the NU1000 to drive the sub?
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post #19 of 24 Old 06-28-2013, 08:55 PM
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Running a ported sub without a high pass filter is like driving a car with out brakes. Even at a moderate volume it can bottom out the sub depending on the port tune and the content being played.
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post #20 of 24 Old 06-29-2013, 07:27 AM - Thread Starter
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So, essentially I've cornered myself into either springing for more money to pick up the NU1000DSP, or run the risk of destroying my driver.
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post #21 of 24 Old 06-29-2013, 08:05 AM
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You're over thinking this for a ported 12" subwoofer. wink.gif You'll need one of the 3" Precision Port extension tubes, and 2 extra 3" couplings. Cut the extension tube in half to extend both tubes to around 25".

As for the amp, just get the Bash 300 or 500. They have a built in high pass filter.

If you want a little more control, get the SPA500.
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post #22 of 24 Old 06-29-2013, 01:02 PM - Thread Starter
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Thanks Erich, my head has been spinning for the last couple days trying to figure out what to do next. I think I'm going to either go with the 500 Watt Bash or spring for the SPA500 and call it a day.
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post #23 of 24 Old 06-29-2013, 07:19 PM
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A couple items of note:

The Crown XLS series do not feature full blown DSP. Just X-over settings. 2nd the Crown (I can't speak for the Behringer) has a 12dB / octave slope starting at 20Hz according to Crown tech support.

An audiophile likes to talk about how much they spent and how good it sounds.

A DIY'er likes to talk about how little they spent and how good it sounds.

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post #24 of 24 Old 02-14-2014, 07:43 PM
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BigSlade,

 

Im curious to know what amp option you chose and the end result of your build.  Was it worth the time and money vs buying one manufactured?  My alternative is to buy dual svs pb-1000s.  What do you think?

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