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Search: Keyword(s): ; Posts Made By: DonH50
Forum: Subwoofers, Bass, and Transducers   08-24-2016, 05:54 AM
Replies: 13
Views: 191
Posted By DonH50
Yes, good point, and I have plenty of those. For...

Yes, good point, and I have plenty of those. For that matter most PCs and monitors have circuits that stay on constantly. At my place power is a bit flaky at times so all the expensive electronics...
Forum: Audio Theory, Setup, and Chat   08-24-2016, 05:48 AM
Replies: 60
Views: 1,335
Posted By DonH50
I don't disagree at all, good point. A passive...

I don't disagree at all, good point. A passive filter's frequency response is a function of the source and load impedances. But, the goal is the output response, yes? You (maybe just I) play with the...
Forum: Subwoofers, Bass, and Transducers   08-23-2016, 07:52 PM
Replies: 13
Views: 191
Posted By DonH50
I leave the switch "ON" on the sub and switch...

I leave the switch "ON" on the sub and switch them off using the trigger output from my prepro to drive a trigger-controlled outlet. I don't like leaving stuff on at home for various reasons.
Forum: Audio Theory, Setup, and Chat   08-23-2016, 07:46 PM
Replies: 60
Views: 1,335
Posted By DonH50
Time domain response due to the added inductor's...

Time domain response due to the added inductor's series impedance. Not related to the filter. I said the driving point impedance, i.e. as seen by the speaker, would be increased, and that will change...
Forum: Subwoofers, Bass, and Transducers   08-23-2016, 12:51 PM
Replies: 25,597
Views: 1,663,958
Posted By DonH50
Bass management is applicable to any source. ...

Bass management is applicable to any source.

LFE is only encoded on movie tracks.
Forum: Subwoofers, Bass, and Transducers   08-23-2016, 10:52 AM
Replies: 25,597
Views: 1,663,958
Posted By DonH50
There are diagrams on the Dolby site showing...

There are diagrams on the Dolby site showing various configurations. I'll try in text format:

Remember LFE is not part of the "main signal".

main signal above crossover -> main speakers
main...
Forum: Subwoofers, Bass, and Transducers   08-23-2016, 06:54 AM
Replies: 25,597
Views: 1,663,958
Posted By DonH50
LFE is not sampled the same as the rest of the...

LFE is not sampled the same as the rest of the signals and has an upper limit of <120 Hz. See e.g. http://www.dolby.com/uploadedFiles/Assets/US/Doc/Professional/38_LFE.pdf or dig into the site for...
Forum: Subwoofers, Bass, and Transducers   08-22-2016, 07:47 PM
Replies: 25,597
Views: 1,663,958
Posted By DonH50
A lot of folk do not realize that the lowest...

A lot of folk do not realize that the lowest fundamental on a grand piano (normal, not one of the extended-range Bosendorfers) is 27 Hz and percussives occur at frequencies well below that. I love a...
Forum: Subwoofers, Bass, and Transducers   08-22-2016, 12:15 PM
Replies: 19
Views: 298
Posted By DonH50
Hmmm... I am not a speaker designer. If the...

Hmmm... I am not a speaker designer. If the drivers are working together in push-pull then presumably the drivers move the air inside the cabinet together instead of compressing and expanding the...
Forum: Subwoofers, Bass, and Transducers   08-22-2016, 11:37 AM
Replies: 13
Views: 191
Posted By DonH50
Most inputs are 10k ohms to 100k ohms or higher....

Most inputs are 10k ohms to 100k ohms or higher. Most preamp outputs are around 100 ohms. The loss with one input is about 20log(10,000/10,100) ~ 0.1 dB. If you put two inputs in parallel the...
Forum: Subwoofers, Bass, and Transducers   08-22-2016, 11:30 AM
Replies: 17
Views: 229
Posted By DonH50
A Rythmik L12 would fit but is there going to be...

A Rythmik L12 would fit but is there going to be adequate airflow for cooling? In addition to all the usual red flags...
Forum: Subwoofers, Bass, and Transducers   08-22-2016, 11:27 AM
Replies: 19
Views: 298
Posted By DonH50
The Rythmik F15HP with either the H600XLR2 or...

The Rythmik F15HP with either the H600XLR2 or H600XLR3 amplifier would work but is not push-pull. Is there a reason you need that? If so DIY is probably your best (cheapest) option.
Forum: Audio Theory, Setup, and Chat   08-21-2016, 08:06 PM
Replies: 60
Views: 1,335
Posted By DonH50
The filter described in your quote is to...

The filter described in your quote is to compensate the roll-off added by the inductors, a Hilbert transform, not a typical active crossover filter. It would be interesting to see the time-domain...
Forum: Subwoofers, Bass, and Transducers   08-21-2016, 07:47 PM
Replies: 66
Views: 1,425
Posted By DonH50
Of course, the situation gets reversed as you...

Of course, the situation gets reversed as you drop below the port frequency, and some sealed subs include techniques to minimize the distortion (servo circuits, multiple voice coils and appropriate...
Forum: Subwoofers, Bass, and Transducers   08-21-2016, 02:57 PM
Replies: 66
Views: 1,425
Posted By DonH50
Note my opinion means doodly-squat; choose what...

Note my opinion means doodly-squat; choose what sounds best to you. That said, whilst I would personally choose the sealed curve for its flatter response and lower frequency extension, if movies are...
Forum: Receivers, Amps, and Processors   08-21-2016, 10:09 AM
Replies: 9
Views: 148
Posted By DonH50
It does not. See jdsmoothie's post as well.

It does not. See jdsmoothie's post as well.
Forum: Subwoofers, Bass, and Transducers   08-21-2016, 09:20 AM
Replies: 66
Views: 1,425
Posted By DonH50
I didn't read the whole thread, just a couple of...

I didn't read the whole thread, just a couple of comments on your last post or two:

Nulls are tricky things, often caused by room modes or boundary reflections and sometimes phase alignment at the...
Forum: Subwoofers, Bass, and Transducers   08-20-2016, 10:01 PM
Replies: 25,597
Views: 1,663,958
Posted By DonH50
The Hulk is a big guy, no surprise he reaches...

The Hulk is a big guy, no surprise he reaches deep... :) You are likely to have a lot of pleasant surprises as you spend more time with your new sub.
Forum: Receivers, Amps, and Processors   08-20-2016, 09:59 PM
Replies: 649
Views: 31,135
Posted By DonH50
I would ping Emotiva. It sounds like the muting...

I would ping Emotiva. It sounds like the muting circuit is disengaging before the output supply capacitors fully bleed down.
Forum: Receivers, Amps, and Processors   08-20-2016, 04:28 PM
Replies: 7
Views: 142
Posted By DonH50
Do you want a tuner or just an integrated...

Do you want a tuner or just an integrated amplifier?
New or used?
Forum: Receivers, Amps, and Processors   08-20-2016, 10:35 AM
Replies: 9
Views: 148
Posted By DonH50
There is no phono input on that AVR. You'll need...

There is no phono input on that AVR. You'll need to buy an aftermarket preamp and plug it into one of the audio line-level inputs. Emotiva, Cambridge, and others make decent phono preamps for aroun...
Forum: Audio Theory, Setup, and Chat   08-20-2016, 10:23 AM
Replies: 19
Views: 214
Posted By DonH50
I use the velcro ties and an inexpensive label...

I use the velcro ties and an inexpensive label maker (Brother battery powered in my case) to make labels for both ends of each cable. A PITA the first time, but a huge time saver down the road when...
Forum: Subwoofers, Bass, and Transducers   08-19-2016, 03:11 PM
Replies: 25,597
Views: 1,663,958
Posted By DonH50
Overheating may not cause problems until...

Overheating may not cause problems until something dies, but as has been pointed out by others, the lifetime of electronic components is drastically reduced if they are run too hot. Much better to...
Forum: Audio Theory, Setup, and Chat   08-19-2016, 03:01 PM
Replies: 43
Views: 577
Posted By DonH50
Ooo, vintage quantum-aligned metaphysically...

Ooo, vintage quantum-aligned metaphysically correct antennae, perfect! :)
Forum: Subwoofers, Bass, and Transducers   08-19-2016, 02:50 PM
Replies: 25,597
Views: 1,663,958
Posted By DonH50
The fans are too closely spaced to get even...

The fans are too closely spaced to get even "push-pull" airflow in this situation. PC's typically pull from the front of the case, on the assumption that is more in the open and has lower ambient air...
Showing results 1 to 25 of 999

 
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