12" JBL speaker $29 on black friday at Bestbuy - Page 66 - AVS Forum | Home Theater Discussions And Reviews
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post #1951 of 2311 Old 04-13-2019, 08:49 PM
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I feel like these need to go on sale more often. I need me a whole lot. And ASAP.

Leave it at 8 ohms and call it a day :)
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post #1952 of 2311 Old 04-13-2019, 09:43 PM
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Quote:
Originally Posted by Blue View Post
Do you power off by cutting the juice on a power strip? That’s what I’ve read is the cause.

Pretty much every possible way to cut power to it. Pulling the plug on the outlet, strip, back of iNuke, cutting it remotely with smart plug, etc. No thump. Maybe I’m just lucky? Lol.

Leave it at 8 ohms and call it a day :)
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post #1953 of 2311 Old 04-14-2019, 07:40 AM
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Originally Posted by Stereodude View Post
I marvel at Best Buy. Several of the subs show they're going to be delivered tomorrow (on Saturday) and that the service level is next day air. On a $30 subwoofer... Who's making money on these other than UPS?
Got mine next day, Saturday.
I just punched the info on my shipping label into the FedEx shipping calculator:




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post #1954 of 2311 Old 04-14-2019, 07:46 AM
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I use an NU3000DSP to run 4 X 12's in ported enclosures.
I wired a standard light switch to the outlet so I can turn the INUKE off and on at will.
Nary a thump, ever. The only time is when I pulled the sub output RCA from my receiver with the amp powered up...like an idiot.

Also, thankfully, I have zero ground loop hum or any other anomaly. The subs are dead silent when the amp is on, and even the amp itself is silent from across the room because I changed out the fan.
Oh, and I dismantled the front plate and painted the ugly LED's around the volume knobs black.
Could not be happier...though on rare occasion I think I could use a second 3000 to really push the subs...then I come to my senses...and besides they have changed the style so it wouldn't match and that just won't do.

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post #1955 of 2311 Old 04-14-2019, 08:28 AM
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Quote:
Originally Posted by EndersShadow View Post
The best bet is going for 4 ohms total. That means either running 4 sets of 4 (needing 4 amp channels), or run them all together as a single 4 ohm load in a bridged amp.

That or buy 2 more for 18 and use the perfect square, giving you two pairs of 9, each a 4 ohm load.

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I'm thinking about using two NX3000D amps and running 4 subs off of each channel. Will that be enough power? Is there a pitfall to this approach that I may be overlooking?

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post #1956 of 2311 Old 04-14-2019, 08:31 AM
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Quote:
Originally Posted by DavidK442 View Post
I use an NU3000DSP to run 4 X 12's in ported enclosures.
Could not be happier...though on rare occasion I think I could use a second 3000 to really push the subs...then I come to my senses...and besides they have changed the style so it wouldn't match and that just won't do.

Adorama had a couple of them b-stock a few days ago for about $200. Have at it.
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post #1957 of 2311 Old 04-14-2019, 10:45 AM
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Ok, so I’ve been sucked in. Saw the $30 sale at BB a couple days ago, remembered seeing the title of this thread, started reading a few pages and ordered 9 subs. I was planning to go the Marty flat-pack route but kept hesitating due to the overall cost, and I had enough BB points to cover the cost of these subs. I did pick up a b-stock inuke 6000dsp from Adorama already. I’ve spent the the last couple days reading through the thread but still have a couple questions. I’m completely new to DIY and looking for a simple approach with the boxes but not sure my situation fits what I’ve read others have done up to this point. These will be the only subs in the room (at least to start with ).

I am leaning towards using 2 boxes with 4 subs each, from either CARiD or Walmart. My problem is I’m not a big fan of the gray carpet and I was planning to put them up front next to my mains. This is in my finished basement and the room is over 6000 sf. Any feedback appreciated.

1) Are there other boxes I should consider? I’m willing to spend a little more if necessary.
2) I could put the boxes behind my couch, but it seems like people doing that also have subs up front? Should I put 2 boxes of 2 each up front and 4 behind the couch? Any other configurations I should consider?
3) I assume I need to learn REW and get a UMIK-1? Any deals on the mic out there?

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post #1958 of 2311 Old 04-14-2019, 12:52 PM
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Quote:
Originally Posted by DavidK442 View Post
Oh, and I dismantled the front plate and painted the ugly LED's around the volume knobs black.
These, or something similar, work fine:
https://www.homedepot.com/p/DANCO-17...6734/100261428
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post #1959 of 2311 Old 04-14-2019, 01:50 PM
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Quote:
Originally Posted by stflush View Post
I am leaning towards using 2 boxes with 4 subs each, from either CARiD or Walmart. My problem is I’m not a big fan of the gray carpet and I was planning to put them up front next to my mains. This is in my finished basement and the room is over 6000 sf. Any feedback appreciated.
I ordered these boxes ( http://www.qpowerinc.com/details.aspx?product_id=20116 ), and I'm going to paint them black. See post 1907 on page 64, where @bubbrik linked to a video where someone painted their car's carpet. I ordered flat black Dupli-Color vinyl and fabric paint from Amazon.

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post #1960 of 2311 Old 04-14-2019, 05:36 PM
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Originally Posted by LastButNotLeast View Post
Got mine next day, Saturday.
I just punched the info on my shipping label into the FedEx shipping calculator:

https://i.imgur.com/7oPKkz1.png?1


Michael
The 4 I got that came FedEx came ground (FedEx Home Delivery) which delivers on Saturday, but they arrived "next day" (Saturday) when I ordered on Friday. 8 came on Saturday via UPS Next Day Air from KY. 4 are still pending (awaiting shipment). 2 others shipped FedEx Standard Overnight on Saturday and are supposed to be here Monday. They shipped from a city about 20 miles away (probably a BB store).
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post #1961 of 2311 Old 04-15-2019, 12:27 AM
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Can 6 of these be wired for a 4 ohm load to be run off a bridged Crown 1502? Is it just the Magic Square minus 3 subs?


Thanks
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post #1962 of 2311 Old 04-15-2019, 02:03 AM
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Quote:
Originally Posted by thediorunner View Post
Can 6 of these be wired for a 4 ohm load to be run off a bridged Crown 1502? Is it just the Magic Square minus 3 subs?




source: http://www.colomar.com/Shavano/spkr_wiring.html


The author does say that 6 speaker combinations are bad, but does not specify why that is. You could also do 4 @ 4ohms plus 2 @ 8 (or 2) ohms. Please remember that some sort of DSP is pretty much mandatory with this setup.
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post #1963 of 2311 Old 04-15-2019, 02:33 AM
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Quote:
Originally Posted by Blue View Post
I'm thinking about using two NX3000D amps and running 4 subs off of each channel. Will that be enough power? Is there a pitfall to this approach that I may be overlooking?

8 subs / channel @ 2 ohms bridged, since you have the capability with that amp.


Edit: Oh, I see what you mean. 4 x 4 ohms. Roughly 700 w/ch clean (non-bridged) at 4 ohms divided by 4 is a nice round 175 per driver. As long as your enclosure provides enough backpressure for the driver you should be just fine. Pretty much optimal.

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post #1964 of 2311 Old 04-15-2019, 04:08 AM
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Quote:
Originally Posted by bimmaguy View Post
8 subs / channel @ 2 ohms bridged, since you have the capability with that amp.


Edit: Oh, I see what you mean. 4 x 4 ohms. Roughly 700 w/ch clean (non-bridged) at 4 ohms divided by 4 is a nice round 175 per driver. As long as your enclosure provides enough backpressure for the driver you should be just fine. Pretty much optimal.
Thanks. I could in theory use a pair of 6000D amps to increase the power per channel, but I'm worried about the possibility of them popping when I turn them on using a remote power strip. I may risk the popping if everyone thinks it's worthwhile to have the extra power.

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post #1965 of 2311 Old 04-15-2019, 05:22 AM
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Dumb question but why would you turn them off? Class D is super high efficiency and pulls little power at idle.

I never turn my amps off and I’ve got 4-5 at any given time.

Then who cares if it thumps.....


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Originally Posted by EndersShadow View Post
Dumb question but why would you turn them off? Class D is super high efficiency and pulls little power at idle.

I never turn my amps off and I’ve got 4-5 at any given time.

Then who cares if it thumps.....


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They are a little power hungry to leave running all the time.



"At idle, the amp consumed 147.71W of power. Something that I found surprising was that when the power was off to the unit but it was still plugged in, it consumed 16.17W of power. I thought the power switch broke the main wire coming in but apparently it doesn't. I didn't have the time to track down exactly what was being fed the power but this might have something to do with why some report popping issues with a remote start setup" https://www.avsforum.com/forum/155-d...p-rundown.html

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post #1967 of 2311 Old 04-15-2019, 01:37 PM
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I found these Belva MDFD12 dual enclosures with black carpet. They come out to $42.50 each after coupon code BLVA4U knocks 15% off. I’m going to get 4 of these instead of 2 quad enclosures as that will give me more flexibility with placement.
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post #1968 of 2311 Old 04-15-2019, 03:34 PM
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I found these Belva MDFD12 dual enclosures with black carpet. They come out to $42.50 each after coupon code BLVA4U knocks 15% off. I’m going to get 4 of these instead of 2 quad enclosures as that will give me more flexibility with placement.


Those are the ones I use. I wish I knew about the coupon code but regardless the price was good. They have a bit of a funny smell when they come out of the box but it dissipates after a week or so. I had some trouble with the red binding posts on both of my boxes but the black ones were fine. I am curious to see if you do too. Not a deal breaker but just a little annoying as they didn’t seem threaded right.


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post #1969 of 2311 Old 04-15-2019, 05:56 PM
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Originally Posted by Blue View Post
Thanks. I could in theory use a pair of 6000D amps to increase the power per channel, but I'm worried about the possibility of them popping when I turn them on using a remote power strip. I may risk the popping if everyone thinks it's worthwhile to have the extra power.

For an extra $100/ amp, it's a no-brainer. You can temporarily set a current limiter to make sure you don't overdrive your subs. Later, you'll have extra juice for upgrades (like say, 4 x 9 12" subs on Black Friday) It's cheaper than buying more or bigger amps later.
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post #1970 of 2311 Old 04-15-2019, 06:09 PM
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Originally Posted by bimmaguy View Post
8 subs / channel @ 2 ohms bridged, since you have the capability with that amp.

For anyone considering this...


Running such an array at 8 ohms rather than 2 would yield better bass performance.

Better cone control (damping factor), lower extension, and less heat in the amp, meaning longer life. Amps are happier with high-ohm loads if you can get away with the resulting decrease in peak power.

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post #1971 of 2311 Old 04-15-2019, 06:12 PM
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Those are the ones I use. I wish I knew about the coupon code but regardless the price was good. They have a bit of a funny smell when they come out of the box but it dissipates after a week or so. I had some trouble with the red binding posts on both of my boxes but the black ones were fine. I am curious to see if you do too. Not a deal breaker but just a little annoying as they didn’t seem threaded right.


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I stumbled across the coupon while browsing the site. They are in KY so the coupon covered tax and a little extra. Thanks for the heads up on the smell and the binding posts. I’ll let you know what I find. The drivers arrive tomorrow and the enclosures Wednesday.

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post #1972 of 2311 Old 04-16-2019, 03:50 AM
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I have four powered by one channel on the iNuke 3000 DSP and it is plenty of power for my 150 square foot room. I have the power plugged into a power strip that cuts the power whenever the AVR is turned off and there is a dull thump from the subs but nothing concerning. A fan modded iNuke is a great amp for these things.


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So, I am now on the same boat, because I finished a single V.B.S.S. 18' and I will drive it on a channel of the 3000. On the other channel I will have to put the 2x2 Jbl's, which previously were in parallel 2 for channel. I have now prepared the lines in series/parallel, but I reach the amplifier with four cables which I have to connect in a single Speakon!
What's the best way to do this, when I count soldering and isolated taping outside of the Speakon as the worst choice?
Thanks for your advice(s)
Regards
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post #1973 of 2311 Old 04-16-2019, 05:42 AM
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My Canadian credit card worked fine with a US shipping address in the last sale. We're you trying to ship to Canada, or USA?

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US address - I've always had this problem for some reason. Hopefully I can figure something out for the next sale.
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post #1974 of 2311 Old 04-16-2019, 06:40 AM
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I have now prepared the lines in series/parallel, but I reach the amplifier with four cables which I have to connect in a single Speakon!
Assuming you were wise enough to get a 4-wire cable, one set of speakers goes to 1+ and 1- (left knob, A), the other set goes to 2+ and 2- (right knob, B).
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post #1975 of 2311 Old 04-16-2019, 06:40 AM
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US address - I've always had this problem for some reason. Hopefully I can figure something out for the next sale.
I suggest speaking with your credit card company.
Michael

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post #1976 of 2311 Old 04-16-2019, 07:06 AM
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Assuming you were wise enough to get a 4-wire cable, one set of speakers goes to 1+ and 1- (left knob, A), the other set goes to 2+ and 2- (right knob, B).
Michael
Ehm, I think I need to articulate a bit deeper. Thanks for the suggestion, but I have not understood to what case your rensignement could apply. As first I have all the wire length I could need, but it is two wire cable. Behringer 3000dsp. To follow your scheme:
I need to use Left Knob A to drive 1 V.B.S.S., two wire, 1+ 1-, I believe.
The other channel Right Knob B will have to drive two separate boxes left and right of Mlp, which accomodate 2 JBL 12' each. I have 2 x 4 pin Neutrik connectors, which till this point have driven only these 2 last boxes with Jbl's separately.
Thanks again for Your interest!
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post #1977 of 2311 Old 04-16-2019, 07:12 AM
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So the JBL boxes are each wired in series (8 ohms), then wired together in parallel to the amp (4 ohms), to 2+ and 2-.
As long as the boxes are equidistant from the mlp, you'll be okay.
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post #1978 of 2311 Old 04-16-2019, 07:22 AM
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Put it in a sealed box ~1.5cf with stuffing and boost the heck out of it and it seems to be fine.
The more the merrier.
What exactly is stuffing the heck out of it? 2.5lbs of polyfill in the 1.5ft^3 box?
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It says boost the heck out of it. Just stuff it normally.

All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find that it was vanity: but the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible.
T. E. Lawrence
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post #1980 of 2311 Old 04-16-2019, 09:16 AM
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One Walmart Deep Pockets pillow, about one pound per box.
Michael

Did you really need to quote that entire post in your reply?
Welcome to AVS - Get out while you still can!
Don't guess, measure: https://www.avsforum.com/forum/91-au...l#post22789786
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