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Forum: Speakers   03-23-2017, 04:33 PM
Replies: 4,890
Views: 526,559
Posted By DonH50
Yes a number of ESLs dip below 2 ohms at very...

Yes a number of ESLs dip below 2 ohms at very high frequencies, some below 1 ohm. Some big ribbons do as well, probably the best example being the (in)famous original Apogees that were 1 ohm nominal.
Forum: Receivers, Amps, and Processors   03-23-2017, 04:27 PM
Replies: 1
Views: 54
Posted By DonH50
Most people (grossly) over-estimate the average...

Most people (grossly) over-estimate the average power from the amplifiers at normal and even loud listening levels. Humbling at times...

Note that most line power meters have very slow response...
Forum: Receivers, Amps, and Processors   03-21-2017, 08:31 PM
Replies: 9
Views: 131
Posted By DonH50
Please do! I, and many others, always want to...

Please do! I, and many others, always want to know a good (or bad) solution.
Forum: Receivers, Amps, and Processors   03-21-2017, 12:52 PM
Replies: 5,754
Views: 248,893
Posted By DonH50
It depends upon what you are trying to correct...

It depends upon what you are trying to correct and what is causing the frequency changes, of course. Comb filter/SBIR effects, good luck. If it is a smooth rolloff such as I have due to massive...
Forum: Speakers   03-21-2017, 12:46 PM
Replies: 9,566
Views: 633,599
Posted By DonH50
Just looking at resistance: 14 AWG = 2.525...

Just looking at resistance:

14 AWG = 2.525 ohms/foot (so two in parallel -- not biwired -- is 1.2625 ohms)
12 AWG = 1.588 ohms/foot
10 AWG = 0.9989 ohms/foot

Source:...
Forum: Speakers   03-21-2017, 12:34 PM
Replies: 4,890
Views: 526,559
Posted By DonH50
I don't think 1.7's dip below 1 ohm though I...

I don't think 1.7's dip below 1 ohm though I could be wrong. If they do it would be at the very highest frequencies which are lowest in amplitude so most amps should be OK. The ribbon in the larger...
Forum: Receivers, Amps, and Processors   03-21-2017, 12:25 PM
Replies: 1
Views: 40
Posted By DonH50
M Code, a person most likely to know, posted this...

M Code, a person most likely to know, posted this link in another thread for a Pioneer replacement mic: http://www.ebay.com/itm/262880185582?rmvSB=true
Forum: Receivers, Amps, and Processors   03-21-2017, 12:19 PM
Replies: 9
Views: 131
Posted By DonH50
NP, glad it was an easy find (and hopefully an...

NP, glad it was an easy find (and hopefully an easy fix!) - Don
Forum: Receivers, Amps, and Processors   03-21-2017, 12:17 PM
Replies: 5,754
Views: 248,893
Posted By DonH50
http://www.dirac.com/unison/

http://www.dirac.com/unison/
Forum: Receivers, Amps, and Processors   03-20-2017, 12:07 PM
Replies: 9
Views: 131
Posted By DonH50
I can't watch the video right now (work network)....

I can't watch the video right now (work network). Ground loops can create a variety of sounds depending upon the circuit design and how the grounds interact in (among) the components. Sometimes it is...
Forum: Receivers, Amps, and Processors   03-19-2017, 03:59 PM
Replies: 9
Views: 131
Posted By DonH50
Google "ground loop". You can buy a signal...

Google "ground loop". You can buy a signal isolator from Amazon, Parts Express, etc. to isolate the grounds and break the loop, or purchase a Hum X or similar for the power line.
...
Forum: Receivers, Amps, and Processors   03-19-2017, 03:57 PM
Replies: 4
Views: 59
Posted By DonH50
No, across the switch, or perhaps the ballast,...

No, across the switch, or perhaps the ballast, and you may need a more complex filter. Do not try fooling with this if you are not familiar with the technology; it is dangerous, and the wrong parts...
Forum: Receivers, Amps, and Processors   03-19-2017, 09:09 AM
Replies: 4
Views: 59
Posted By DonH50
The light is probably generating a noise spike...

The light is probably generating a noise spike that is on the AC power line or radiated and coupling into the AVR when you turn it off. The spike overloads the AVR or glitches some logic inside and...
Forum: Receivers, Amps, and Processors   03-18-2017, 09:11 AM
Replies: 25
Views: 388
Posted By DonH50
Bridged, or bi-amped? Bridging an amplifier does...

Bridged, or bi-amped? Bridging an amplifier does provide significantly more power, theoretically four times the Watts, though in practice it is usually closer to doubling.
Forum: Receivers, Amps, and Processors   03-18-2017, 09:08 AM
Replies: 2
Views: 49
Posted By DonH50
It depends upon the manufacturer. Thermal...

It depends upon the manufacturer. Thermal (overheating), short circuits, excessive current, clipping/overvoltage, DC on the output, ultrasonic oscillations, etc. can be sensed but what manufacturers...
Forum: Receivers, Amps, and Processors   03-15-2017, 01:07 PM
Replies: 37
Views: 499
Posted By DonH50
Good point. Probably not a problem for an...

Good point. Probably not a problem for an interconnect, but I often look for CCS or CCA (copper-clad aluminum) in the description or stamped on the cable, avoid it, and pay the extra for pure copper....
Forum: Speakers   03-15-2017, 11:15 AM
Replies: 23
Views: 403
Posted By DonH50
Hey, that's my story! :) Originally posted over...

Hey, that's my story! :) Originally posted over on WBF and re-used whenever the situation warrants. Like now.

I don't think all amplifiers sound the same driving all speakers, nor do I think there...
Forum: Receivers, Amps, and Processors   03-15-2017, 10:59 AM
Replies: 37
Views: 499
Posted By DonH50
Still seems to point at a bad amp.

Still seems to point at a bad amp.
Forum: Receivers, Amps, and Processors   03-15-2017, 10:46 AM
Replies: 37
Views: 499
Posted By DonH50
Sounds like a bad amp, unless the speaker is bad...

Sounds like a bad amp, unless the speaker is bad and loading it.
Forum: Receivers, Amps, and Processors   03-15-2017, 10:28 AM
Replies: 37
Views: 499
Posted By DonH50
Did you accidentally set the amp into bridge mode...

Did you accidentally set the amp into bridge mode or otherwise flip a switch that disables the left output? I once accidentally changed the input on one channel from XLR to RCA and that took me a bit...
Forum: Receivers, Amps, and Processors   03-15-2017, 10:06 AM
Replies: 37
Views: 499
Posted By DonH50
^^^ What he said. For audio it does not...

^^^ What he said.

For audio it does not matter if you use the red, white, or yellow cable to carry an audio signal. For that matter, most interconnects use 75-ohm cable because it is widely...
Forum: Subwoofers, Bass, and Transducers   03-13-2017, 03:53 PM
Replies: 275
Views: 31,323
Posted By DonH50
Could be lots of reasons, including room...

Could be lots of reasons, including room nulls/dips and phase cancellation among subs, but also remember C weighting rolls off below 30 Hz so leaves out a lot of subwoofer frequencies. If Audyssey is...
Forum: Subwoofers, Bass, and Transducers   03-13-2017, 03:50 PM
Replies: 28,332
Views: 1,780,469
Posted By DonH50
Note C weighting rolls off below 30 Hz so it may...

Note C weighting rolls off below 30 Hz so it may be good for adjusting levels around the crossover frequency and above but not for really measuring the FR of a subwoofer.
Forum: Subwoofers, Bass, and Transducers   03-13-2017, 11:37 AM
Replies: 28,332
Views: 1,780,469
Posted By DonH50
Easiest thing is to just try it and see. If the...

Easiest thing is to just try it and see. If the levels are widely disparate you might not be able to get them completely gain matched without running out of trim range but try and see. OTOH if they...
Forum: Subwoofers, Bass, and Transducers   03-13-2017, 11:33 AM
Replies: 28,332
Views: 1,780,469
Posted By DonH50
^^^ Ditto for me. Deep and tight... :)

^^^ Ditto for me. Deep and tight... :)
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