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#402573 - 04/07/14 05:29 PM Understanding Tech Specs on A/V Equipment
AlaskanAVGuy Offline
old hand

Registered: 04/01/14
Posts: 72
A lot of people are looking for the latest and greatest Home Theater addition and are always comparing different Speakers, Receivers etc... to other brands but are often mislead by the Tech Specs and other claims made by them.

I would like to discuss any questions people may have regarding the understanding of those Tech-specs and how to compare them to other various brands. To make the most informed decision possible before purchasing A/V Equipment. And getting the most bang for your buck as we all strive for the Ultimate Home Theater that we can afford.

Including:
S/N & SPL Ratio's
Power Output RMS WATTS
Freq-Response
THD (Total Harmonic Distortion)
Design
ETC....


Edited by AlaskanAVGuy (04/07/14 05:31 PM)
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The Teacher is in: Trust but Verify

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#402581 - 04/07/14 05:57 PM Re: Understanding Tech Specs on A/V Equipment [Re: AlaskanAVGuy]
AlaskanAVGuy Offline
old hand

Registered: 04/01/14
Posts: 72
For example: Onkyo TX-NR828 Receiver

This receiver claims that it produces 160Watts @ 0.7Thd
however upon closer review we see that this is with only
2-Channels driven Simultaneously. So exactly how much power
are you getting when driving All-Channels Simultaneously?

In this case Sound & Vision Magazine did a Test Bench and
shows you just how much power your really getting to those speakers.

5 Channels Continuously Driven, 8 ohm loads (.1 THD) 109.9 watts
7 Channels Continuously Driven, 8 ohm loads (.1 THD) 78.5 watts


That's a loss of over 80 Watts per channel.
This is why it's so important to understanding Tech-Specs

Look for companies that test ALL-CHANNELS DRIVEN such as Emotiva & Axiom
which make some of the finest Power-Amps anywhere for amazing prices.

Sources:
http://www.onkyousa.com/Products/model.php?m=TX-NR828&class=Receiver&source=prodClass

http://www.soundandvision.com/content/onkyo-tx-nr828-av-receiver-test-bench

[img:center]http://www.soundandvision.com/images/styles/600_wide/public/913onkrec.prmo__0.jpg?itok=IEBRcf8l[/img]


Edited by AlaskanAVGuy (04/07/14 06:41 PM)
_________________________
The Teacher is in: Trust but Verify

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#402583 - 04/07/14 06:01 PM Re: Understanding Tech Specs on A/V Equipment [Re: AlaskanAVGuy]
chesseroo Offline
connoisseur

Registered: 05/13/02
Posts: 4832
Loc: western canada
Hey Alaskan,

There's been many discussions of many technical subjects over the years on these forums.
Some are much like beating dead horses 15 lives over.

Aside from that, Axiom puts out a newsletter every so often and includes technical articles on, well, all of these things and has also done so for many years now.

People can (and have for some time), accessed this info at the Axiom pages dedicated to it.
You might want to have a look. Many folks on the forums are not new to these subjects.
http://www.axiomaudio.com/guides
_________________________
"Those who preach the myths of audio are ignorant of truth."

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#402587 - 04/07/14 06:08 PM Re: Understanding Tech Specs on A/V Equipment [Re: chesseroo]
AlaskanAVGuy Offline
old hand

Registered: 04/01/14
Posts: 72
Apparently not many have read them, so I created a discussion forum to discuss the Fundamentals and Industry Standards. As I found out on other Forums that not everyone is aware of as I do not see these Topics being discussed on a regular basis. And their points are contrary to these very Fundamentals.

So please if you have anything to add to the Forum Topic at hand please do so. It doesn't matter how much you know i'm an Audio & Videophile but we should still practice our Fundamentals because those that forget history are doomed to repeat it.

This is for Audiophiles & Newbs alike to help eachother out.



Edited by AlaskanAVGuy (04/07/14 06:25 PM)
_________________________
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#402593 - 04/07/14 06:26 PM Re: Understanding Tech Specs on A/V Equipment [Re: AlaskanAVGuy]
Murph Offline
axiomite

Registered: 10/05/06
Posts: 6863
Loc: PEI, Canada
I know who you are !!!

You need only change your sig to
"REFLECT but verify"
_________________________
With great power comes Awesome irresponsibility.

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#402601 - 04/07/14 06:48 PM Re: Understanding Tech Specs on A/V Equipment [Re: Murph]
Ken.C Online   content
shareholder in the making

Registered: 05/03/03
Posts: 17789
Loc: NoVA
Originally Posted By: Murph
I know who you are !!!

You need only change your sig to
"REFLECT but verify"


YOU HAVE NO HONOR.
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I am the Doctor, and THIS... is my SPOON!

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#402605 - 04/07/14 07:03 PM Re: Understanding Tech Specs on A/V Equipment [Re: AlaskanAVGuy]
AlaskanAVGuy Offline
old hand

Registered: 04/01/14
Posts: 72
Settle down now Children were discussing: Understanding Tech Specs on A/V Equipment here only. Stick to the Topic.


Edited by AlaskanAVGuy (04/07/14 07:19 PM)
_________________________
The Teacher is in: Trust but Verify

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#402614 - 04/07/14 07:39 PM Re: Understanding Tech Specs on A/V Equipment [Re: AlaskanAVGuy]
chesseroo Offline
connoisseur

Registered: 05/13/02
Posts: 4832
Loc: western canada
Originally Posted By: AlaskanAVGuy
were discussing: Understanding Tech Specs on A/V Equipment here only. Stick to the Topic.

I would give this about 1 more hour before the thread is horribly hijacked by beer speak and what the wife did to the kids today.

Just a heads up.
_________________________
"Those who preach the myths of audio are ignorant of truth."

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#402615 - 04/07/14 07:42 PM Re: Understanding Tech Specs on A/V Equipment [Re: AlaskanAVGuy]
MarkSJohnson Online   happy
shareholder in the making

Registered: 09/27/04
Posts: 10939
Loc: Central NH
The wife gave the kids beer today!
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::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::

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#402617 - 04/07/14 07:46 PM Re: Understanding Tech Specs on A/V Equipment [Re: MarkSJohnson]
chesseroo Offline
connoisseur

Registered: 05/13/02
Posts: 4832
Loc: western canada
Originally Posted By: MarkSJohnson
The wife gave the kids beer today!

I give Tom about 3 minutes to respond with the most likely following question:

Which beer was it?
_________________________
"Those who preach the myths of audio are ignorant of truth."

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