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Forum: 2-Channel Audio   03-08-2015, 09:22 AM
Replies: 13
Views: 286
Posted By R Swerdlow
It was an older model, a large 3-way, near or at...

It was an older model, a large 3-way, near or at the top of the line, but I don't remember the model. B&W frequently changes it's line up of speakers, and I don't keep up with that.

Although the...
Forum: 2-Channel Audio   03-01-2015, 09:07 AM
Replies: 13
Views: 286
Posted By R Swerdlow
I don't think it matters whether its a bookshelf...

I don't think it matters whether its a bookshelf or a floor standing speaker. As long as one of those Kevlar 5" or 6" drivers are used while crossed over to the tweeter at 4,000 Hz, it can be a...
Forum: Speakers   02-27-2015, 06:31 AM
Replies: 3
Views: 47
Posted By R Swerdlow
Those are 3-way speakers. Depending on the...

Those are 3-way speakers. Depending on the crossover design, it is not uncommon for drivers to be wired in opposite polarity.

I found this diagram of the crossover. It's too small to clearly see...
Forum: 2-Channel Audio   02-26-2015, 08:07 AM
Replies: 13
Views: 286
Posted By R Swerdlow
To echo what others have already said, your CM7s...

To echo what others have already said, your CM7s are weak on bass. Get a sub woofer.

These speakers are said by B&W to have 8 ohm impedance, but they drop to as low as 3 ohms in the range of 100...
Forum: Audio Theory, Setup, and Chat   02-25-2015, 12:38 PM
Replies: 285
Views: 5,055
Posted By R Swerdlow
Here are comments from a former FTC employee who...

Here are comments from a former FTC employee who was directly involved in the effort to create a more modern standard for power ratings of multi-channel AV receivers. I thought they also belonged on...
Forum: Speakers   02-25-2015, 12:09 PM
Replies: 20
Views: 325
Posted By R Swerdlow
Go for the Affordable Accuracy set. At $500...

Go for the Affordable Accuracy set. At $500 delivered for one center and 4 monitors, you won't beat that. I've heard those monitors, and they're quite good.

I've also heard those NHTs. They're...
Forum: Speakers   02-23-2015, 07:27 AM
Replies: 38
Views: 449
Posted By R Swerdlow
Sony didn't bother to print the power rating as...

Sony didn't bother to print the power rating as the FTC regulations specify. As a result, you cannot directly compare its power to the Onkyo.

I would assume Sony did the measurement and didn't...
Forum: Audio Theory, Setup, and Chat   02-20-2015, 08:05 AM
Replies: 285
Views: 5,055
Posted By R Swerdlow
A friend and neighbor worked for the FTC (not...

A friend and neighbor worked for the FTC (not FCC), and he worked on that ruling about amplifier ratings.

I asked him why the FTC didn't go after the bogus claims of the audio cable makers. He...
Forum: Audio Theory, Setup, and Chat   02-20-2015, 07:58 AM
Replies: 285
Views: 5,055
Posted By R Swerdlow
In addition to misrepresenting UL1711, the OP...

In addition to misrepresenting UL1711, the OP also misrepresented the FTC's rule on Power Output Claims for Amplifiers Utilized in Home Entertainment Products (16 CFR Part 432). What he said was...
Forum: Speakers   02-20-2015, 07:01 AM
Replies: 38
Views: 449
Posted By R Swerdlow
If you want to compare this receiver to others,...

If you want to compare this receiver to others, use this power rating:

65w (20-20kHz, 0.7%, 8ohms, 2ch driven)

The Federal Trade Commission (FTC) requires that all receivers and amps sold in...
Forum: Speakers   02-17-2015, 10:47 AM
Replies: 4,920
Views: 299,725
Posted By R Swerdlow
On Monday, I heard the single prototype of this...

On Monday, I heard the single prototype of this speaker. It sounded great even though I couldn't hear it in stereo. The BMR driver does very well as a mid range. It cannot produce the higher...
Forum: Speakers   02-17-2015, 10:13 AM
Replies: 9,403
Views: 926,427
Posted By R Swerdlow
Don't close off the rear port. You won't damage...

Don't close off the rear port. You won't damage the speakers, but you will loose out on their good low frequency performance.

Is that 18" between the rear of your speakers and the wall, or 18"...
Forum: Audio Theory, Setup, and Chat   01-29-2015, 12:25 PM
Replies: 28
Views: 341
Posted By R Swerdlow
The OP says he is located in NE Arkansas, and is...

The OP says he is located in NE Arkansas, and is looking to receive stations in Jonesboro (15 miles away) and Memphis (60 miles away). A quick look at a map shows this is the Mississipi River...
Forum: Audio Theory, Setup, and Chat   01-29-2015, 08:28 AM
Replies: 28
Views: 341
Posted By R Swerdlow
The metal roof is almost certainly the problem. ...

The metal roof is almost certainly the problem. It shields the antenna from the weak signals. The same can happen with attic insulation that has an aluminum foil coating.

Mount the antenna above...
Forum: Speakers   01-21-2015, 10:54 AM
Replies: 10
Views: 227
Posted By R Swerdlow
I haven't heard the Yamaha NS-8390...

I haven't heard the Yamaha NS-8390 (http://asia.yamaha.com/en/products/audio-visual/speaker-systems/home-speaker-systems/ns-8390_black__r/?mode=model)'s, so I can offer general advice.

Most center...
Forum: Speakers   01-09-2015, 01:41 PM
Replies: 19
Views: 448
Posted By R Swerdlow
I often see questions about bi-amping from people...

I often see questions about bi-amping from people who have a new multi channel AV receiver but who don't use all the speaker channels in their system. They ask if they should convert those unused...
Forum: Audio Theory, Setup, and Chat   06-25-2014, 08:21 AM
Replies: 38
Views: 1,887
Posted By R Swerdlow
Does the floating explanation also apply to...

Does the floating explanation also apply to microphones? Their signal voltages are similar to phono pickups, but in studio use, where much longer cables are common, they usually use balanced...
Forum: Audio Theory, Setup, and Chat   06-25-2014, 07:45 AM
Replies: 38
Views: 1,887
Posted By R Swerdlow
Although I think this subject has been adequately...

Although I think this subject has been adequately covered, and the answer seems to be that balanced audio is not worth it. I thought this brief anecdote might be interesting.

A number of years...
Forum: Audio Theory, Setup, and Chat   06-09-2014, 08:52 AM
Replies: 120
Views: 4,053
Posted By R Swerdlow
Quote:Originally Posted by...

Quote:Originally Posted by Raveman http://www.avsforum.com/img/forum/go_quote.gif (http://www.avsforum.com/t/1533798/double-blind-amplifier-testing#post_24774060)

The goal is to observe...
Forum: Audio Theory, Setup, and Chat   06-03-2014, 12:32 PM
Replies: 120
Views: 4,053
Posted By R Swerdlow
Quote:Originally Posted by...

Quote:Originally Posted by mcnarus http://www.avsforum.com/img/forum/go_quote.gif (http://www.avsforum.com/t/1533798/double-blind-amplifier-testing/60#post_24788639)

The first thing you have to...
Forum: Audio Theory, Setup, and Chat   06-03-2014, 08:48 AM
Replies: 120
Views: 4,053
Posted By R Swerdlow
Quote:Originally Posted by...

Quote:Originally Posted by mcnarus http://www.avsforum.com/img/forum/go_quote.gif (http://www.avsforum.com/t/1533798/double-blind-amplifier-testing/60#post_24787764)

A note on the statistics: If...
Forum: Audio Theory, Setup, and Chat   06-02-2014, 03:39 PM
Replies: 120
Views: 4,053
Posted By R Swerdlow
Quote:Originally Posted by...

Quote:Originally Posted by CharlesJ http://www.avsforum.com/img/forum/go_quote.gif (http://www.avsforum.com/t/1533798/double-blind-amplifier-testing/60#post_24786046)

Yes, but in audio each...
Forum: Audio Theory, Setup, and Chat   06-02-2014, 01:26 PM
Replies: 120
Views: 4,053
Posted By R Swerdlow
Quote:Originally Posted by...

Quote:Originally Posted by Raveman http://www.avsforum.com/img/forum/go_quote.gif (http://www.avsforum.com/t/1533798/double-blind-amplifier-testing/30#post_24783567)

I currently have 10...
Forum: Speakers   05-31-2014, 02:49 PM
Replies: 9,403
Views: 926,427
Posted By R Swerdlow
Quote:Originally Posted by...

Quote:Originally Posted by GBagley http://www.avsforum.com/img/forum/go_quote.gif (http://www.avsforum.com/t/939744/the-official-salk-sound-owners-and-discussion-thread/9150#post_24779345)

Hi...
Forum: Audio Theory, Setup, and Chat   05-30-2014, 03:31 PM
Replies: 120
Views: 4,053
Posted By R Swerdlow
Quote:Originally Posted by...

Quote:Originally Posted by arnyk http://www.avsforum.com/img/forum/go_quote.gif (http://www.avsforum.com/t/1533798/double-blind-amplifier-testing#post_24776423)

Th e comparison where no...
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