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Forum: Speakers   08-20-2014, 07:33 PM
Replies: 3,735
Views: 437,983
Posted By DonH50
I'm not that hard=core, though probably because I...

I'm not that hard=core, though probably because I simply don't have the room. :) Actually, even those big Tymp's don't deliver clean low bass like a good sub, so I'll toddle along with what I have.
...
Forum: Speakers   08-20-2014, 11:46 AM
Replies: 3,735
Views: 437,983
Posted By DonH50
Bunch of tweaks listed on the MUG site: ...

Bunch of tweaks listed on the MUG site: http://www.integracoustics.com/MUG/MUG/tweaks/index.html
Forum: Speakers   08-20-2014, 11:44 AM
Replies: 3,735
Views: 437,983
Posted By DonH50
I was thinking if the crossover were different in...

I was thinking if the crossover were different in the new speakers, which it probably is, then the phase relationship between subs and mains could be different and thus create a null that wasn't...
Forum: Audio theory, Setup and Chat   08-20-2014, 11:14 AM
Replies: 31
Views: 359
Posted By DonH50
That would seem to point to a difference in...

That would seem to point to a difference in amplifiers, which might be due to them having different gains and noise floors, which ripples through the rest of the chain. In any event, still seems like...
Forum: Audio theory, Setup and Chat   08-19-2014, 08:34 PM
Replies: 31
Views: 359
Posted By DonH50
What has changed since it was last used (and was...

What has changed since it was last used (and was quieter)?

Are you closer to the speakers than you were before?
Forum: Audio theory, Setup and Chat   08-18-2014, 06:15 PM
Replies: 31
Views: 359
Posted By DonH50
It just keeps anything, whether leakage from the...

It just keeps anything, whether leakage from the other components or EMI/RFI into an open input, from adding to the noise. I usually just make one by soldering pin to shield or you can buy them....
Forum: Audio theory, Setup and Chat   08-18-2014, 10:51 AM
Replies: 31
Views: 359
Posted By DonH50
I'd just use my ears for this one. There is a...

I'd just use my ears for this one. There is a variety of equipment that would do the job, as RayDunzl said (quite correctly), but I wouldn't bother. Noise floor measurements can be tricky and most...
Forum: Speakers   08-18-2014, 10:36 AM
Replies: 3,735
Views: 437,983
Posted By DonH50
A 63 Hz null may be due to positioning of...

A 63 Hz null may be due to positioning of speakers or listener but may also be influenced by the phase relationship among the mains and the bass panels. If the crossover is different between the two...
Forum: Speakers   08-18-2014, 10:31 AM
Replies: 16
Views: 324
Posted By DonH50
Even if all parameters were exactly the same, the...

Even if all parameters were exactly the same, the area of two 4" circles is about 25"sq and the area of a single 8" circle is about 50"sq.

As others have said there are so many variables that...
Forum: Audio theory, Setup and Chat   08-18-2014, 07:22 AM
Replies: 31
Views: 359
Posted By DonH50
Is the noise broadband (hissing) or hum/buzzing? ...

Is the noise broadband (hissing) or hum/buzzing?

Any component in a signal chain will add its own noise and can amplify the noise of the preceding stage. It may attenuate the input noise, along...
Forum: Receivers, Amps, and Processors   08-17-2014, 09:59 PM
Replies: 3
Views: 102
Posted By DonH50
Possible but more likely the AVR was damaged. Put...

Possible but more likely the AVR was damaged. Put an ohm meter across the speakers terminals and see what they measure. If a few ohms they should be OK. or have a friend or local dealer or repair...
Forum: Speakers   08-17-2014, 01:39 PM
Replies: 3,735
Views: 437,983
Posted By DonH50
Random comments: I have a 7.x Magnepan...

Random comments:

I have a 7.x Magnepan system. I use MG-IIIa's (old, old Maggies) for L/R. they are only about 18" - 24" from the wall behind but that wall (and all others) are heavily treated so...
Forum: Receivers, Amps, and Processors   08-17-2014, 01:14 PM
Replies: 16
Views: 411
Posted By DonH50
I would run two dedicated 20 A outlets plus some...

I would run two dedicated 20 A outlets plus some standard 15 A plugs for everything else. Also think about your lighting; I do not have track lighting and had a couple of duplex outlets wired so the...
Forum: Receivers, Amps, and Processors   08-17-2014, 01:03 PM
Replies: 3
Views: 102
Posted By DonH50
That indicates a problem with the receiver,...

That indicates a problem with the receiver, probably nothing to do with MCACC. Double check the speaker connections in case something got loose. You could just pull all the speaker wires and see if...
Forum: Audio theory, Setup and Chat   08-09-2014, 08:55 AM
Replies: 13
Views: 483
Posted By DonH50
Cryogenic treatment can cause problems with a lot...

Cryogenic treatment can cause problems with a lot of dielectrics. Not sure if that relates to the changes mentioned above, but when looking at superconducting devices getting connections to them in...
Forum: Audio theory, Setup and Chat   08-08-2014, 08:14 PM
Replies: 8
Views: 289
Posted By DonH50
Ideally the phase would be a linear line, which...

Ideally the phase would be a linear line, which in turns leads to constant group delay. That means all frequencies are delayed equally, no time distortion.
Forum: Audio theory, Setup and Chat   08-07-2014, 08:50 PM
Replies: 19
Views: 472
Posted By DonH50
I understand IR drop. I do not understand the...

I understand IR drop. I do not understand the importance of where the MOV is placed in this application. I would normally place any filter as near the component as possible, and that goes for the MOV...
Forum: Receivers, Amps, and Processors   08-07-2014, 08:34 PM
Replies: 2,047
Views: 147,813
Posted By DonH50
IME most people turn things up and start...

IME most people turn things up and start listening more closely when they add a new amp (or anything else). Inevitably they find something new and improved. It was really humbling when I was sure I...
Forum: Audio theory, Setup and Chat   08-07-2014, 04:34 PM
Replies: 19
Views: 472
Posted By DonH50
I do not see how the length affects the MOV. One...

I do not see how the length affects the MOV. One inch or ten feet it still clamps. If there was a long distance from MOV to component then coupled energy could be a problem, but for something like...
Forum: Audio theory, Setup and Chat   08-07-2014, 04:23 PM
Replies: 603
Views: 15,066
Posted By DonH50
Reviewers probably don't want to waste time...

Reviewers probably don't want to waste time reviewing bad-sounding equipment, and magazines probably don't get as much distribution from negative reviews. I suspect a lot of the lack of bad reviews...
Forum: Receivers, Amps, and Processors   08-07-2014, 06:19 AM
Replies: 3
Views: 106
Posted By DonH50
Plug in an antenna wire. You can start with this...

Plug in an antenna wire. You can start with this one: http://www.parts-express.com/fm-dipole-antenna--210-020 Probably similar items available at Wal-Mart, Radio Shack, etc.

It looks like the...
Forum: Audio theory, Setup and Chat   08-06-2014, 08:05 PM
Replies: 603
Views: 15,066
Posted By DonH50
Everest and Toole are decent starts... ...

Everest and Toole are decent starts...

http://www.amazon.com/Master-Handbook-Acoustics-Alton-Everest/dp/0071603328
...
Forum: Receivers, Amps, and Processors   08-06-2014, 08:10 AM
Replies: 21
Views: 483
Posted By DonH50
A regulated supply is a good, albeit sometimes...

A regulated supply is a good, albeit sometimes expensive, solution and many high-end class D amplifier makers suggest that.

NFB may not help PSRR (it depends).

A SMPS can provide much wider...
Forum: Receivers, Amps, and Processors   08-06-2014, 08:06 AM
Replies: 12
Views: 362
Posted By DonH50
Most of us are against spending money on things...

Most of us are against spending money on things that will not cause audible improvement. This is based upon technical knowledge and years (decades in many cases) of experience. And most of us with...
Forum: Audio theory, Setup and Chat   08-06-2014, 07:46 AM
Replies: 603
Views: 15,066
Posted By DonH50
A lot of the basics an EE learns are applicable...

A lot of the basics an EE learns are applicable to the things discussed here. Of course, I am biased... Speaker design parameters, system topology, specific filter/crossover implementations, and...
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