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Search: Posts Made By: nograveconcern
Forum: DIY Speakers and Subs   05-22-2015, 10:03 AM
Replies: 6
Views: 106
Posted By nograveconcern
In the absence of PL Premium, silicone, wood glue...

In the absence of PL Premium, silicone, wood glue mixed with sawdust, or hot glue will work on the inside. Body filler like bondo works well for the outside.
Forum: DIY Speakers and Subs   05-22-2015, 06:32 AM
Replies: 39
Views: 1,280
Posted By nograveconcern
Well, what a difference a few inches makes....

Well, what a difference a few inches makes. (that's what she said)

I did a hard reset the AVR thinking that might clear up some weirdness. Re-ran Audyssey. No more 30-100hz hole but it set the...
Forum: DIY Speakers and Subs   05-20-2015, 01:11 PM
Replies: 39
Views: 1,280
Posted By nograveconcern
That is what it looks like. IDK why. I broke out...

That is what it looks like. IDK why. I broke out a new Audyssey mic and tried it too. Same.

It's not real consistent on the crossover frequency either. I got 120, 110 and 90. Seems like the more...
Forum: DIY Speakers and Subs   05-20-2015, 10:58 AM
Replies: 51
Views: 864
Posted By nograveconcern
Not only the center, but if you don't use a sub...

Not only the center, but if you don't use a sub you have to mix the LFE back into the L & R.
Forum: DIY Speakers and Subs   05-20-2015, 10:24 AM
Replies: 39
Views: 1,280
Posted By nograveconcern
Made a slight improvement by flipping the phase...

Made a slight improvement by flipping the phase of the subs. Ran Audyssey several times. The best I could get was 90hz for the crossover.

Before sweep vs 3 seat average after messing with...
Forum: DIY Speakers and Subs   05-19-2015, 07:36 AM
Replies: 20
Views: 320
Posted By nograveconcern
Think that's the fsc on the box tab.

Think that's the fsc on the box tab.
Forum: DIY Speakers and Subs   05-19-2015, 07:33 AM
Replies: 20
Views: 320
Posted By nograveconcern
Fb = Enclosure resonance (usually for bass reflex...

Fb = Enclosure resonance (usually for bass reflex systems), in Hz
I think of it as Frequency of box, but I looked it up.
DC = 0hz
Forum: DIY Speakers and Subs   05-19-2015, 06:24 AM
Replies: 20
Views: 320
Posted By nograveconcern
+1 just set your peak voltage limiter to make...

+1 just set your peak voltage limiter to make Xmech impossible.

Then build the box big enough that you can reach x-max with a certain fraction of that which you deem to be likely based on the...
Forum: DIY Speakers and Subs   05-18-2015, 07:45 PM
Replies: 39
Views: 1,280
Posted By nograveconcern
No need for black paint, but high build primer...

No need for black paint, but high build primer does help to hide flaws. You could coat the entire cab in that first to make a really even finish. It's slick though so it's hard to roll a texture...
Forum: DIY Speakers and Subs   05-18-2015, 05:28 PM
Replies: 39
Views: 1,280
Posted By nograveconcern
Yeah I have an hour and a half on them, but I...

Yeah I have an hour and a half on them, but I haven't measured to make sure everything is set up optimal so I hesitate to make any judgments yet. I got them hooked up at 11 PM last night and just...
Forum: DIY Speakers and Subs   05-18-2015, 05:01 PM
Replies: 39
Views: 1,280
Posted By nograveconcern
There's two ways of doing something: right... ...

There's two ways of doing something: right...

...or again.

I've been using a foam roller up until this point in an effort to get a smoother matte finish. However it's just not covering. After 4...
Forum: DIY Speakers and Subs   05-18-2015, 01:21 PM
Replies: 6
Views: 149
Posted By nograveconcern
You are under-ported. With 4 ports they should be...

You are under-ported. With 4 ports they should be about 6.5" dia each. Not sure why you are not seeing much air movement. Either something is wrong or you aren't driving them hard.

Also be aware...
Forum: DIY Speakers and Subs   05-16-2015, 04:22 PM
Replies: 39
Views: 1,280
Posted By nograveconcern
Time to flush trim: ...

Time to flush trim:
http://i151.photobucket.com/albums/s136/majsuckelton/Theater/IMG_1375_zpsufujz1gj.jpg

Trim the backs first, then the ends....
Forum: DIY Speakers and Subs   05-14-2015, 07:15 AM
Replies: 33
Views: 458
Posted By nograveconcern
High-passing and lo-passing will free up headroom...

High-passing and lo-passing will free up headroom so that other frequencies can be played louder before clipping, but 1500w is still 1500w.



1 your choice there

2 Can you return it? Any...
Forum: DIY Speakers and Subs   05-14-2015, 05:56 AM
Replies: 33
Views: 458
Posted By nograveconcern
You are correct if you are listening to a single...

You are correct if you are listening to a single frequency sine wave. The reality is that music is a complex and changing waveform and there is no way to predict what that will look like.



1 I...
Forum: Subwoofers, Bass, and Transducers   05-13-2015, 07:29 PM
Replies: 28
Views: 583
Posted By nograveconcern
Chest thump is generally 80-120hz. Boosting this...

Chest thump is generally 80-120hz. Boosting this area 3-5 db could get you there. Also I see a lot of people turn down the crossover on the LFE channel to 80hz. It should be left at 120 and turning...
Forum: DIY Speakers and Subs   05-13-2015, 02:36 PM
Replies: 33
Views: 458
Posted By nograveconcern
Yes Yes What the graph shows...

Yes



Yes


What the graph shows is power required to reach the SPL in the SPL chart at a given frequency.

None of them. The speaker is rated fro 750w continuous. If you feed it more than...
Forum: DIY Speakers and Subs   05-13-2015, 02:16 PM
Replies: 33
Views: 458
Posted By nograveconcern
Consideration for what?

Consideration for what?
Forum: DIY Speakers and Subs   05-13-2015, 01:29 PM
Replies: 33
Views: 458
Posted By nograveconcern
That depends on the signal you send to the amp,...

That depends on the signal you send to the amp, the eq you use and the gain setting.

AAL is = V^2 / R at a given frequency where V = sqrt(value you input for Signal in W * nominal resistance of...
Forum: DIY Speakers and Subs   05-13-2015, 01:15 PM
Replies: 33
Views: 458
Posted By nograveconcern
because resistance varies with frequency which...

because resistance varies with frequency which causes power to vary for a given voltage. You will notice that amplifier apparent load is inversely proportional to impedance in WinISD. That's because...
Forum: Subwoofers, Bass, and Transducers   05-13-2015, 01:11 PM
Replies: 28
Views: 583
Posted By nograveconcern
My movie curve starts about 3db hot at 120hz and...

My movie curve starts about 3db hot at 120hz and end up around 10db hot at 8hz where it begins to roll off. Music depends. Some sounds good with the movie setting. Some tracks need more and some need...
Forum: DIY Speakers and Subs   05-13-2015, 12:48 PM
Replies: 33
Views: 458
Posted By nograveconcern
You can't limit continuous output. Only peak...

You can't limit continuous output. Only peak voltage. You prevent fried voice coils by being conservative with the stupid knob and watching the signal lights on the amp.
Forum: DIY Speakers and Subs   05-13-2015, 11:45 AM
Replies: 33
Views: 458
Posted By nograveconcern
Exactly. You set the limiter on the amp...

Exactly.


You set the limiter on the amp to keep peak voltage below what would cause you to exceed x-lim/x-mech. This keeps you from physically damaging the driver from bottoming the coil on the...
Forum: DIY Speakers and Subs   05-13-2015, 10:19 AM
Replies: 33
Views: 458
Posted By nograveconcern
To design your enclosure, model the driver + box...

To design your enclosure, model the driver + box taking into account the relationship of amplifier RMS & Peak power to cone excursion. Don't design the enclosure with the L/T.

Any boost you apply...
Forum: DIY Speakers and Subs   05-13-2015, 07:53 AM
Replies: 17
Views: 272
Posted By nograveconcern
You could. If you wire the SI's in series to 8...

You could. If you wire the SI's in series to 8 ohm each and put one on each channel of the 6k (UM on the 3k) you will get a little more power into them then you would if you put them both on one...
Showing results 1 to 25 of 725

 
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