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Search: Posts Made By: LTD02
Forum: DIY Speakers and Subs   07-02-2015, 07:01 AM
Replies: 14
Views: 179
Posted By LTD02
nice work.

nice work.
Forum: DIY Speakers and Subs   07-01-2015, 07:45 PM
Replies: 518
Views: 19,168
Posted By LTD02
nice.

nice.
Forum: DIY Speakers and Subs   06-30-2015, 11:30 AM
Replies: 43
Views: 865
Posted By LTD02
"You need to learn how to use the quote feature. ...

"You need to learn how to use the quote feature. Your post is basically unreadable since we can't tell your words from his."


the quote button in the editor does not work for me (running i.e....
Forum: DIY Speakers and Subs   06-30-2015, 07:02 AM
Replies: 4
Views: 127
Posted By LTD02
seems like a three component project: ...

seems like a three component project:

Bluetooth receiver:

...
Forum: DIY Speakers and Subs   06-28-2015, 03:49 PM
Replies: 862
Views: 29,977
Posted By LTD02
i assume 'not is aware of most of this, but it is...

i assume 'not is aware of most of this, but it is a pretty good example, so i figured that i would post it up.


it appears the jargon term for the device used to measure power that is both...
Forum: Speakers   06-28-2015, 01:10 PM
Replies: 1,234
Views: 30,839
Posted By LTD02
that should work pretty well, or if space is...

that should work pretty well, or if space is abundant, a pair of 18tbw100 per cab, two cabs would be another choice for about the same money and perhaps even slightly better performance (3-4db...
Forum: DIY Speakers and Subs   06-27-2015, 06:17 PM
Replies: 862
Views: 29,977
Posted By LTD02
I don't disagree with anything that you wrote. ...

I don't disagree with anything that you wrote. But, extend the example to AC with fluctuating voltage and the whole thing changes.
Pavg (average power) is the area under the V * I curve divided by...
Forum: DIY Speakers and Subs   06-27-2015, 11:37 AM
Replies: 3
Views: 83
Posted By LTD02
which driver do you have d2 or d4?

which driver do you have d2 or d4?
Forum: DIY Speakers and Subs   06-27-2015, 11:34 AM
Replies: 43
Views: 865
Posted By LTD02
"Hello everyone, (argh, forum wont let me post...

"Hello everyone, (argh, forum wont let me post links or pictures yet..:mad:)"


hello.



"I am not an audiophile but I LOVE music"
Forum: DIY Speakers and Subs   06-27-2015, 11:03 AM
Replies: 43
Views: 865
Posted By LTD02
ping

ping
Forum: DIY Speakers and Subs   06-27-2015, 10:56 AM
Replies: 32
Views: 528
Posted By LTD02
one solution is to usb -> uca222 -> rca/trs or...

one solution is to usb -> uca222 -> rca/trs or rca/xlr converter cable -> inuke


http://www.behringer.com/EN/Products/UCA222.aspx


$30


I'm not sure what the frequency response on...
Forum: DIY Speakers and Subs   06-27-2015, 08:36 AM
Replies: 862
Views: 29,977
Posted By LTD02
in this one, the black line is power. sin...

in this one, the black line is power. sin voltage * sin current = power. average power is 0.50.
that is consistent with Vrms * Irms = Pavg = 0.707 * 0.707 = 0.5
next up is orange. sin voltage *...
Forum: DIY Speakers and Subs   06-27-2015, 07:36 AM
Replies: 862
Views: 29,977
Posted By LTD02
"Essentially, the RMS value you have listed on...

"Essentially, the RMS value you have listed on the right is incorrect, as it does not consider the full cycle."


with rms, we are squaring all the distances, then taking the root of the...
Forum: DIY Speakers and Subs   06-26-2015, 05:57 PM
Replies: 70
Views: 1,078
Posted By LTD02
nate's point is this: with a center to center...

nate's point is this:
with a center to center distance on the woofers of about 2.5 feet
and a crossover point at 750hz, which is 18 inches in wavelength, which is 9 inches for a half wavelength....
Forum: DIY Speakers and Subs   06-26-2015, 05:24 PM
Replies: 862
Views: 29,977
Posted By LTD02
it probably doesn't matter. it's just that ohm's...

it probably doesn't matter. it's just that ohm's power equation doesn't hold in this case. multiplying a sine wave of voltage by a sine wave of current (in phase) to get a sine wave of power is...
Forum: DIY Speakers and Subs   06-26-2015, 01:28 PM
Replies: 862
Views: 29,977
Posted By LTD02
I'm assuming the scope is calculating rms current...

I'm assuming the scope is calculating rms current properly. what I am getting at is if the current is non-sinusoidal (big peaks), the calculated rms current is going to be higher for waveforms with...
Forum: DIY Speakers and Subs   06-26-2015, 12:38 PM
Replies: 862
Views: 29,977
Posted By LTD02
is power calculated properly using rms current...

is power calculated properly using rms current with a non-sinusoidal draw (i.e. big peaks)?
Forum: DIY Speakers and Subs   06-26-2015, 12:23 PM
Replies: 70
Views: 1,078
Posted By LTD02
I see we were typing at the same time. deltalite...

I see we were typing at the same time. deltalite ii 2515 has a -3db point in 3 c.f. sealed (per driver) of ~80hz.
Forum: DIY Speakers and Subs   06-26-2015, 12:20 PM
Replies: 70
Views: 1,078
Posted By LTD02
not sure if an mtm is the best approach. tmm...

not sure if an mtm is the best approach. tmm arrangement may work better.


eminence deltalite ii 2515 may be worth taking a look at. it likes the big volume cab (~5 c.f. per driver) similar to...
Forum: DIY Speakers and Subs   06-26-2015, 11:19 AM
Replies: 862
Views: 29,977
Posted By LTD02
how are you calculating efficiency?

how are you calculating efficiency?
Forum: Speakers   06-26-2015, 09:38 AM
Replies: 1,234
Views: 30,839
Posted By LTD02
neat room that you put together there. where did...

neat room that you put together there. where did the marvel 'murals' come from?


also, it probably doesn't matter much in your case, but...


http://www.avsforum.com/attachments/66901

...
Forum: DIY Speakers and Subs   06-25-2015, 05:54 PM
Replies: 4
Views: 176
Posted By LTD02
check out speakerpower amps. dgage and seaton...

check out speakerpower amps. dgage and seaton can hook you up, iirc.


an sp1 4000 should be able to drive all 4 drivers at 2 ohms w/ 4kw power.
Forum: DIY Speakers and Subs   06-25-2015, 03:33 PM
Replies: 15
Views: 145
Posted By LTD02
you've got it.

you've got it.
Forum: DIY Speakers and Subs   06-25-2015, 02:49 PM
Replies: 15
Views: 145
Posted By LTD02
the avr should handle the low pass for the sub. ...

the avr should handle the low pass for the sub. it has a crossover (most likely 4th order LR) built in.


no additional low pass is required and it can muck things up if used because of...
Forum: DIY Speakers and Subs   06-25-2015, 09:52 AM
Replies: 23
Views: 581
Posted By LTD02
np, it is pretty clear in the software. I'm not...

np, it is pretty clear in the software. I'm not sure how buried it may be in the settings/menu on the front of the amp if you are using that method. also, you mentioned low pass filter is set in the...
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