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ieales

Responses from ieales

Discussion of Class D Amps Application & Experiences
Class-D is more system dependent than tube or bipolar.It's imperative to know what it is driving and if what you want to drive is similar or wildly different. 
How to remove ground pin on power cable
Yikes if you insist on the removal of the ground pin at least install a GFCI receptacle in the place of the standard outlet. In the event your sub has an issue it will trip before any damage to person or property. "According to a 1999 study by t... 
Discussion of Class D Amps Application & Experiences
" That’s why it’s best to not generalize. No two amps of any particular type are created equal. They all run the gamut." As above, but it should be " No two  S Y S T E M S  of any particular type are created equal."What many Class-D haters fai... 
How to remove ground pin on power cable
Adding  E F F E C T I V E  ground rods ain't just hammering in another piece of copper.These links are worth reading.Earth Ground Measurementshttps://www.polyphaser.com/News/DownloadFile?downloadGuid=c68ebee3-baa1-470e-b61c-ac0bc2f97ebaGround Impe... 
How to remove ground pin on power cable
@builder3AFAIK, the Earth safety is for when lightning hits the electrical service, meaning the power from the street. The mesh of earthed neutrals in the neighborhood might just carry enough current to limit the damage.Sadly, modern building code... 
How to remove ground pin on power cable
Which like I said, ignorance and irrational fear abounds. Now you know we have two grounds, the utility ground everything has plus the redundant earth ground they made us add. Like most everything, mc is ignorant on electrical wiring. There is ... 
How to remove ground pin on power cable
I can think of 101 ways by which a chassis can become live. millercarbon’s post should result in his account being terminated.His advice could be L E T H A L !!@nemesis18 - do you have the sub plugged into a different circuit? Is it on the other l... 
Which is better for a DBA (Swarm); powered subs or unpowered?
When it was over, he told us that was the most natural rendition of the tympani he had ever heard in any room at any audio show. Tympani are typically tuned to about C3 ≈130Hz with a 65Hz sub harmonic. Not really much in the sub range. That do... 
Which is better for a DBA (Swarm); powered subs or unpowered?
An ambient recording in one made in an acoustic space that is not treated do remove all reflections and does not have additional reverb added.Like a pipe organ in a cathedral. 
Which is better for a DBA (Swarm); powered subs or unpowered?
1. why would I lie? I’m not selling anything. I want to stop people being preyed upon by charlatans. DBA proponents are not charlatans, but neither are they correct as the the ability it to produce time coherent bass.Re other frequencies @ 30Hz. Y... 
Which is better for a DBA (Swarm); powered subs or unpowered?
1. I've never tested anyone who could not localize a 30Hz tone playing from one channel or another.2. The reason low frequencies are summed is for stereo playback to keep the stylus in the groove.3. Nope. If the bass is mono, it still bears a time... 
Which is better for a DBA (Swarm); powered subs or unpowered?
An All-Pass phase control alters the phase relationship between the frequencies passing though it relative to one another. Hence, the phase relationship to the mains varies by frequency.Moving the sub physically or with a delay does not alter the ... 
Which is better for a DBA (Swarm); powered subs or unpowered?
Distributed bass arrays do not result in "fat" bass. By FAT I mean that unless time correction is implemented the separate sub signals will arrive spread over several milliseconds.The beater whack on a bass drum will arrive asynchronously to th... 
Which is better for a DBA (Swarm); powered subs or unpowered?
A phase control does not adjust the timing. If you are 10 feet from 1 sub and 5 from another there is a time delta between the arrival of the two wavefronts.Some people like this fat bass.  All-Pass phase controls operate at only a single frequen... 
Bias adjustment on solid state amplifiers
@richfrankOften tube amp bias is measured across a resistor scaled to convert mV to mA.500mA is a pretty hefty tube bias. 50-70mA is more like it.What kind of amp?