Understanding Power Ratings in AV Receivers

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  • Опубліковано 14 січ 2025

КОМЕНТАРІ • 464

  • @tedmanasa907
    @tedmanasa907 8 років тому +113

    One of the best Audioholics videos ever: no punches pulled, committed to keeping the industry honest and consumers educated. More like this please!

    • @Elricky124
      @Elricky124 5 років тому +2

      Ted Manasa sounds very honest and factual.

    • @jimturpin
      @jimturpin 4 роки тому

      Totally agree with Ted Manasa above. I've been in telecommunications for years, and now engineer (Cellular biz) test systems that test communications hardware, particularly amplifiers across all radio frequency bands. After all these years I decided to get into home theater and was blown away at just how confusing the audio industry is compared to one that relies on strict FCC defined guidelines and specifications that I come from.
      Clearly some of this is marketing. Even "horsepower" was a marketing ploy to give farmers an idea how strong a steam engine would be compared to something the farmers understood better such as a horse.
      But it appears marketing has gotten a little overly creative, I can say the same thing when it comes to figuring horsepower on a lawnmower these days since a number of the manufacturers no longer apply a horsepower rating to their mowers, so I have to resort to watching videos and gather other peoples experiences using a particular mower when the grass is a foot high to determine if it is going to cut my yard.
      I really like that Audioholics tests these units under load and across a wide band of frequencies, even to mention the extended duty cycles imposed on the power supply by lower frequencies. Perhaps what we really need to see is an all channels loaded and driven, and power measured at each output, to 1% THD in the various modes the amplifier operates. I realize that would entail a lot of testing permutations, which could easily be handled by an ATE (Automated Test Environment) system. But probably a simpler method would be to measure the input power to the amplifier while putting it through its paces from a few to all output channels, and note where the input power seems to start clipping to determine the MCP (Maximum Composite Power) of the amplifier(s) (and the power supply limitations as well), and particularly amplifier efficiency.

  • @offtheheezy425
    @offtheheezy425 4 роки тому +4

    Hey Gene I studied Electrical Engineering in College I would have loved to have you as a Filters teacher. You're doing wonders to all A/V enthusiast with no obligations to pander. You're the hero we need!

  • @KnightSayer
    @KnightSayer 3 місяці тому

    That was the best 11mins that I have spent in trying to understand what these ratings mean and how to judge the result. I think I actually get it now. Great video, Gene!

  • @marcusrodriguez9992
    @marcusrodriguez9992 7 років тому +1

    I know you guys get a lot of well deserved praise and thanks but this video really was eye-opening. I have a four month old Yamaha Adventage A2060 running a Dolby Atmos 5.1.4 system. After watching this video I wondered how it would sound with a external amplification powering my two mains and possibly my center channel. Based on your recommendation from another video I went with a Emotiva A500, 5 channel amp and my jaw literally dropped when I turned it on for the first time. As happy as I was without an external power amp , Im amazed by The difference .Unfortunately many of us are accepting these manufactures power ratings without realizing the demands placed on the power supply when running a large multi channel system. Many thanks to you for this eye-opening video. The Emotiva, A relatively inexpensive upgrade, has brought a whole new dimension to my home theater setup.

    • @Audioholics
      @Audioholics  7 років тому +3

      Great feeback, you made a great choice. Thanks Marcus.

  • @henrymartin1691
    @henrymartin1691 4 роки тому +3

    Loved this! This has been my gripe for a decade or more. I just bought a really inexpensive Yamaha 2 channel stereo receiver for my bedroom that is rated 100 watts rms...now get this....frequency response 40hz to 20khz. I’m figuring it’s more like a 50 wpc amp in the real world. No complaints, it’s a nice little rig for a bedroom. But...no match for my Marantz 2270 that has a real rating of 70 wpc. These kinds of misleading specs really yank my chain. I also have a 1984ish Yamaha A700...now that’s a real 100 wpc integrated amp. It even blew one of my JBLs once. But that’s another story. Ok...full disclosure...I blew the speaker ( I ignored the circuit breakers kicking in at an extreme volume for an extended time...don’t judge...I had one too many drinks). Did you know a JBL LF driver puts out the prettiest blue colored flame? Thanks again for a GREAT video. And tell Mr. Spock I saw him smile.....

  • @shensy842
    @shensy842 6 років тому

    This is stuff I had to teach customers like 20 years ago when I was involved with audio. The look on customer's faces when you pulled the veil of marketing BS and explained precisely what was what.... priceless. Guaranteed they returned for advice later down the track.

  • @markstone3224
    @markstone3224 8 років тому +1

    Excellent video Gene - NAD is a great example, as they rate their AVRs with all channels driven simultaneously, at full bandwidth and a rated distortion. They call this Full Disclosure Power. And since real-world program material requires short bursts of very high power rather than the continuous power normally specified, NAD also includes dynamic power ratings at 8 Ohms, 4 Ohms, and even 2 Ohms!
    Thanks!!!

  • @sanchezzz1
    @sanchezzz1 8 років тому +2

    Love that you are keeping the industry honest! I'm no mathematician so I have kept to NAD, McIntosh etc.

  • @martynphillips6646
    @martynphillips6646 7 років тому

    I have learned more here from Gene in a few minutes than scanning the web for months to check out the BS in ratings, superb video. When you have the facts, the knowledge and the skill to communicate them its great, superb job.

  • @berthacdellasala
    @berthacdellasala 8 років тому +10

    Love your commitment and quality work for all #audiophiles. Very proud of you always.

  • @The.Home.Cinema.Engineer
    @The.Home.Cinema.Engineer 8 років тому +46

    Gene I really love your videos !
    I wish more people especially younger people who are into music and hifi would watch your videos !
    Your honest and remain unbiased which is hard for me to do
    Your stuff is based on actual facts, science and math
    as an Audio engineer graduate I can say to EVERYONE WATCHING he knows his stuff
    Side note can we expect a video review of the Anthem mrx 1120- or 720 soon?

    • @Audioholics
      @Audioholics  8 років тому +7

      Very kind. thank you.

    • @abbeyking09
      @abbeyking09 8 років тому

      I just purchased a 720 and they make my speaker loud and clean, first I play some songs without running the ARC. An then i run the ARC and o boy you can tell the difference right away, The only bummer is I cant play my old iPod through USB.which is i missed on my Yamaha receiver

    • @The.Home.Cinema.Engineer
      @The.Home.Cinema.Engineer 8 років тому

      Abbey king
      yea Ive heard great things about There room correction.
      I really want the 720 !

    • @EdwardPCampbell
      @EdwardPCampbell 8 років тому +4

      My rule of thumb is very simple. Divide the power supply wattage (if stated) to 3/4, (typical conventional iron plate transformer efficiency) as power supplied to the processing and amplification circuitry. Reduce the remainder to 3/4, as typical npn/pnp transistor efficiency. Eg: 800 watt power supply = 600 watts output. 600 watts x 3/4 = 450 watts total. In other words, you get slightly more than half the rated power consumption as final total output. The rest is space heating. Therefore, one would expect 90 watts rms per channel continuous, from a 5.1 receiver with an 800 watt power supply. If the device doesn't state power consumption treat all claims with caution. Toroidal transformers (up to 90% efficiency) and Class D output (typically 85% efficiency) might deliver a further 15-20% maximum output, depending on the quality and efficiency of the switching circuitry. No one listens to single channel output, so its claim should be rejected as pointless window dressing. No one would use a 5.1 receiver as a mono amp. That is a PA or bass reinforcement application only, for which one might buy a 1000-2000 watt mono or bridged stereo amp.

  • @chefgreek
    @chefgreek Рік тому

    Gene! Finally something I can understand as a "newer techie" newbie. Keep up the great work.

  • @RBBBBBBBBB533
    @RBBBBBBBBB533 8 років тому +9

    I bought the Marantz 5010 based on your and Hugo's advise for getting older receivers for better price. Got it for $550. Its scheduled to arrive tomorrow. Cant wait.

  • @dvan3630
    @dvan3630 8 років тому +18

    great video on these AV receiver

  • @sklodowska226
    @sklodowska226 8 років тому +17

    top notch info!

  • @dlloyd6300
    @dlloyd6300 8 років тому +4

    LOVED the video! This is the kind of behind the scenes knowledge that I love, and for some reason I cant find elsewhere. Keep up the good work!

  • @Pseudoics
    @Pseudoics 8 років тому +9

    Thank you for keeping the pressure on these manufacturers and this BS.
    Too much of the tech industry as a whole is obsessed with selling you a flashy image and brand, instead of competent products.

  • @thejizzle21
    @thejizzle21 8 років тому +1

    Great review! This is something i needed explained for a long time. Mini stereo shelf systems used to confuse me with their power ratings, but now I know that the 10% THD on these ratings is why a 50w/channel 0.08% THD amp sounds cleaner and louder than a 400 watt 10% THD mini shelf system. Spread the knowledge guys.

  • @robwingerter6488
    @robwingerter6488 Рік тому

    What I love is when they take the distorted rating, multiply it by all channels and put that number on the box. Especially in a HT in a box setup with tiny speakers. Oh, where have the old days gone? Thanks Gene!

  • @jamistevens9049
    @jamistevens9049 Рік тому

    Videos like this really open my eyes thank you

  • @reynaldos1chorizo
    @reynaldos1chorizo 8 років тому +1

    Thanks Gene, So much respect for you and Hugo for giving honest and fair reviews and educatimg the consumer like myself that care about specs and dont want to get ripped off. You guys keep the audio industry in check and its necessary. And even though not all manufacturers are being dishonest, it makes it harder for those honest manufaturers to compete against those competitors that inflate their specs. Thanks again , keep cranking out these vids.

  • @ejcheck
    @ejcheck 8 років тому +1

    Very nice.
    I remember the power rating wars of the 60's-70's, which gave absurd claims.
    They have become more sophisticated since, as you show here.
    This review reminds me of the type of work Julian Hirsch used to do.
    I don't think I can give a bigger compliment than that.

  • @willbrink
    @willbrink 4 роки тому

    Useful, concise, and easy to follow info for those looking to make educated choices.

  • @brentfaas1398
    @brentfaas1398 4 роки тому +1

    Thanks Gene. That was great information. I enjoy your channel so much. Keep up the good work.

  • @ede6539
    @ede6539 3 роки тому

    Have a Pioneer Elite about 5 yrs old great receiver added a Crown Xl duocore 2505 changed everything ! Great video

  • @rolltidedavid
    @rolltidedavid 4 роки тому +1

    Good stuff

  • @dathansmart858
    @dathansmart858 4 роки тому

    Really educational and I loved the use facts and sound logic to cut through the marketing tactics. Showing the numbers on why your making specific call-outs really strengthens your point. Hard to argue against logic. Thanks Again!!

  • @ryanfuller5
    @ryanfuller5 8 років тому +1

    Utterly fantastic video. I love the class and professionalism this site brings. The information is honest and accurate. I eagerly await a Pioneer D3 review... as I have been enjoying the Elite D3 line for years (SC-35, SC-75, and SC-87)... they were all pre-Onkyo. I've been a bit skeptical since and dabbled with a mid-range Denon. The SC-87 holds up well with the B&W 600 series 5.2 I am running. Looking forward to it!

  • @Totalpckge
    @Totalpckge 5 років тому +1

    Best video EVER! Big up yourself Audioholics!!!

  • @peterwilliamson2965
    @peterwilliamson2965 2 роки тому

    Thanks, Gene! Your video is still educational and relevant.

  • @davidkornegay1813
    @davidkornegay1813 3 роки тому

    I always love your insight on power ratings

  • @Emperor36
    @Emperor36 8 років тому +1

    Gene, thank you for the update, my friend is in sales and I disclose a lot of information on him on how to sell receivers and speakers. It's must appreciated, thanks again

  • @marinoint
    @marinoint 8 років тому +6

    Thank you for this important info!
    Really appreciate it!

  • @donalddeorio2237
    @donalddeorio2237 4 роки тому

    Great video, in the 70s companies were playing all kinds of games with power ratings. That's why I went to separates with a Carver av705x 125 watts channel 20- 20k htz all channels driven. Big difference in sound quality

  • @JetSnake128
    @JetSnake128 7 років тому +2

    Great vid Gene, as always I feel you're giving great honest advice, I learn a lot watching your vids!

  • @marcdostie8409
    @marcdostie8409 8 років тому +6

    This is useful to a lot of consumers that just read the front of a box and say "Wow, 1000 watts!" and manufacturers just get into a pissing match over how much bigger their number is. It will continue to get worse as the number of channels increases and chassis size remains the same.

  • @JoeBob79569
    @JoeBob79569 6 років тому +1

    Wow. I just bought an old Onkyo on eBay there today, and was wondering what "that" line on the spec sheet was all about. Really great explanation.. thanks!

  • @rammstein265
    @rammstein265 3 роки тому

    Great explanation and insightful

  • @X2FileWrightonite
    @X2FileWrightonite 8 років тому +8

    Didn't realize that Onkyo bought Pioneer. THX 4 that update.

  • @dylanmcgaw5492
    @dylanmcgaw5492 7 років тому

    love these guys, no nonsense regardless of your price range

  • @davidnguyen5028
    @davidnguyen5028 Рік тому

    Good work Gene.

  • @KymaSynthesis
    @KymaSynthesis 2 роки тому

    This was a really great video. Very informative.

  • @TheHomesteadVision
    @TheHomesteadVision 8 років тому +3

    great video thank you very much

  • @arthurschadeberg8913
    @arthurschadeberg8913 7 років тому

    Gene
    Awesome lectures when you are alone. You have my attention now. Cheers

    • @Audioholics
      @Audioholics  7 років тому

      THX, hope it isn't too dry though.

  • @richardszyniszewski2791
    @richardszyniszewski2791 2 роки тому

    THANK YOU; you are doing great job👍🏻👍🏻👍🏻
    Thank you for finding your channel ❤️

  • @GB-je5tc
    @GB-je5tc 4 роки тому

    Good for you Gene...
    Don't be afraid to eep on calling BS.
    We need informed and enlightened technical folk like yourself to illuminate hypocracy/ dishonesty.

  • @seiferflo24
    @seiferflo24 8 років тому

    Thanks Gene, I could have listened to you for an hour easily. All your feedback is always crystal clear even for a newbie.
    Coming back to the subject, if all manufacturers could provide a standard graph like you did, sweep freq, specs written for 2ch driven, 4 & 8Ohms, with low THD it would be so much easier to compare each amplifiers.

    • @Audioholics
      @Audioholics  8 років тому

      Most manufacturers prefer to show their products in the best possible light either by massaging the specs or not showing the conditions in which the specs were taken (most usual).

  • @kdas4085
    @kdas4085 4 роки тому

    What a crisp review..loved it

  • @fwabble
    @fwabble 3 роки тому

    Amazing video, thanks Gene

  • @michaelwillacy3846
    @michaelwillacy3846 5 років тому

    Can't wait for the pioneer specs, check out the vsx-lx 503, happy new year to audio holics crew, big up from Jamaica.

  • @SaZooCaballero
    @SaZooCaballero 3 роки тому

    This was SUPER helpful. Thx a bunch!

  • @JohnnieJQman
    @JohnnieJQman 8 років тому

    Excellent video. A great explanation that has equipped me, and I'm sure all of the viewers, with a clear perspective of how to make a wise decision when buying new amplification, especially in the AV receiver range. Thank you!

  • @manalishi8341
    @manalishi8341 8 років тому

    Thanks Gene, much appreciated! That was a very important piece of information, and I hope that many consumers will pay attention! I am in business with hi-fi, and we constantly explain to consumers that they should at least compare the power rating of Receiver (maybe 11 x 200 Watt) with power consumption of the device with is usually below 2000 Watts in such case, and search for some magic. What is disappointing, is that today's dealers need such "education" as well.

  • @T0mmyGun654
    @T0mmyGun654 8 років тому

    Good job on the video and article. Very useful at dispelling power rating myths.

  • @workaholic7600
    @workaholic7600 7 років тому

    Thank you! Found your channel by chance, Love your videos I cant stop watching them!

  • @sukhvindertoor5558
    @sukhvindertoor5558 2 роки тому

    Excellent video!

  • @ach442403
    @ach442403 8 років тому

    Keep up the good work...its about time someone calls out the manufacture's and keep em honest...if they want loyal customers they have to provide real world spec's...love the videos have learned alot by watching them...i would request videos of receivers and amps show bench tests of what they do power wise and dynamics, then a overall review....also maybe some of the"best bang for the buck" in differnt price ranges...i think it would better help people get a better understanding of what they are spending hard earned dollars on....keep listening!!!

  • @tross2420
    @tross2420 3 роки тому

    very very informative. Thank you so much!

  • @danielseguin913
    @danielseguin913 4 роки тому

    Wow. Amazing video. Thanks for sharing.

  • @inuyasha561
    @inuyasha561 Рік тому

    Love this, this was awesome. thank you

  • @abbeyking09
    @abbeyking09 8 років тому

    I was looking for a new receiver between Yamaha Rx A1060 and Marantz SR5011. I can't decide which on to get, so i bought an ANTHEM MRX 720. on the AUDIOHOLICS review when you guys first impression "Gotta have it " am like sold, this is the one now my Paradigm Mini Monitor v7, Monitor center 3 V7, and cinema 100 for surround and back surround, they sound so big even though they are small speakers. I never enjoy a two channel until now. thanks boys you guys are honest on how you guys make a review on the product.

  • @milonandez8706
    @milonandez8706 7 років тому

    Yet another really good informative video Gene! But, I don't care what anyone else here says, where's Hugo? That's my guy, so hopefully we'll see him back in future videos. Thanks again!

  • @timdiebert7128
    @timdiebert7128 8 років тому

    Wow what a great & informative video!! Thank you for clarifying power ratings & making it understandable from a layman standpoint. I understand all the jargon & things but you helped make things VERY clear. Well done Gene! Thx

  • @herbertcooper4887
    @herbertcooper4887 2 роки тому

    great job guys

  • @alanwilliams4835
    @alanwilliams4835 4 роки тому

    I just love that straight to the point , at last thanks for exposing the 1K nonsense for manufacturers testing into 6 ohms . We are in the pro audio field supply large format systems to festivals the golden rule we use is if a power amp can’t drive into a 2 ohm load from 20 hz to 20 k then don’t buy it . If a av amp can drive a 4 ohm load a least your half way there .

  • @timesink2660
    @timesink2660 8 років тому

    a really fantastic explanation!

  • @tausha46
    @tausha46 8 років тому

    thank you for being so honest

  • @fedelione
    @fedelione 8 років тому

    Excelente video Gene! Muy informativo. Saludos!

  • @mount999
    @mount999 7 років тому

    Watched many reviews of your channel. good work guys keep it up. Immensely helped me. Thanks

  • @TheKnightOperator
    @TheKnightOperator 5 років тому

    Love what you're saying, couldn't agree more, keep doing what you're doing my friend.

  • @brentg231
    @brentg231 4 роки тому

    Great analysis! This was very informative and helpful.

  • @kevinpeters6672
    @kevinpeters6672 8 років тому

    Hello Gene, Hugo and all your staff: I'm of course a music lover (mostly smooth jazz and modern rockin orchestra such as Yanni and other forms of music depending on the mood !) Believe when I say that I've been a subscriber to your sight a long time. I don't usually converse on your sight unless I'm in need for professional insight. What I do enjoy immensely is reading and watching your unbiased facts on Audio equipment. I enjoy your you tube episodes and your guys jocular banter and think it's funny as hell when you read some of the feed back cry babies that take things so bloody personal. I own a modest set up and upgrade when possible. "Sorry about babbling" Just wanted to thank you guys for having a straight up honest business to give people like me educated advise so I can produce better quality sound and how to go about doing it. "THANKS AGAIN"
    KEVIN !

  • @lionpaw4068
    @lionpaw4068 3 роки тому

    Hey my bro. you're a man with a sharp mind you teaches wisdom when it comes to power and I love listening to you coz you know your stuff you're always putting us on the right road I have an Onkyo RZ- 820 an old boy he's powerful but just as you said with 6 and 4 ohms this shouldn't be but I'm not putting full power out. very nice receiver, thanks again for all the information it keeps me alert. stay safe and be strong.. until
    Lionpaw

  • @NorthonTorga
    @NorthonTorga 5 років тому

    Thanks for sharing this video, this helps a lot to avoid the marketing bs companies tries to push onto us.

  • @seanmcd72
    @seanmcd72 7 років тому

    Great video. Should be required viewing for anyone wanting quality receiver.

  • @wideglide9880
    @wideglide9880 7 років тому

    Awesome video. I suspected this. Now I know. Excellently done.

  • @TomGrooms2802
    @TomGrooms2802 8 років тому

    Gene, I agree wholeheartedly with everything you said. However I feel we need to explain that the difference between a 100 watt per channel AVR and a 120 or 140 watt per channel AVR is basically moot (if not inaudible). Thanks for putting in the time and effort to help educate the masses.

  • @jordanniagara3131
    @jordanniagara3131 3 роки тому

    This guy knows his stuff!

  • @robflynn7905
    @robflynn7905 8 років тому

    Happy with my NAD 150 true watts per channel. Awesome vid guys

  • @gilaxia
    @gilaxia 3 роки тому

    Thank you!

  • @haploideallel
    @haploideallel 8 років тому +2

    Beautiful explanation! Tnx! :D
    Love these '101-tutorials' :D
    Wouldn't mind more of these 'basic knowledge' videos :)

  • @1JUSTGOTLUCKY1
    @1JUSTGOTLUCKY1 8 років тому

    Excellent video!! A lot of great information on interpreting specs. Thank you!!

  • @bill32889
    @bill32889 8 років тому +6

    XPA gen 3 review please. I'm interested in how the switch mode power supply holds up vs a toroidal.

    • @Vylkeer
      @Vylkeer 8 років тому

      Robert Ontiveros Emotiva Amps seem to be the real deal. Their ratings and specs are incredible! They're able to provide real power always all-channels driven and RMS into 8 ohms. While many other AVR manufacturers are just using marketing gimmicks.

    • @bill32889
      @bill32889 8 років тому +1

      yeah emotiva has had a good reputation but this is a new design and they have been out for a while without a single review so I would like to know if there is a downside to the switch mode power supply vs a big heavy toroidal. I need an amp with lots of dynamics and control to make my apogee duetta signatures sing.

    • @Audioholics
      @Audioholics  8 років тому

      Not sure since we haven't reviewed it but their old stuff with linear supplies is pretty solid. I use XPR-1's and love them.

    • @bill32889
      @bill32889 8 років тому +1

      would be cool if you guys could do a review on them. I'm going to CES this year so will stop by their room, but I would like to see a review of how they measure. Its interesting they have been out for awhile but not a single review has been posted.

    • @bill32889
      @bill32889 8 років тому

      Yeah but this is new for emotiva. It would be like if a car maker were to just suddenly change to all electric cars from gas. Both can be used to make great cars but you would want some reviews or a test drive before just jumping in right? FYI I just bought one because its been a while and only one review is out. Im going to test drive it.

  • @clasvirhodes4969
    @clasvirhodes4969 4 роки тому

    Wow ! great video. Thank you.

  • @bruceandt
    @bruceandt 3 місяці тому

    Nice job sir!!!

  • @rennelenriquez3618
    @rennelenriquez3618 8 років тому

    This video is very helpful and informative. Keep it up Gene! 👍🏻

  • @samrotolo7303
    @samrotolo7303 8 років тому

    Thank you...In the market for some home audio and finding these videos informative.

  • @killercommi3371
    @killercommi3371 7 років тому

    Superb! Very informative.

  • @serg472
    @serg472 8 років тому +19

    Please, please continue with this solo format. It's always interesting listening to you and you alone, Hugo never contributes anything to the conversation, just sits there making awkward useless remarks I couldn't stand it.

  • @lawrencev.athill7502
    @lawrencev.athill7502 7 років тому

    I'm going to be O.D.'ing on your channel today. Very helpful information.

  • @kabirshafiul
    @kabirshafiul 8 років тому

    Very nice logical fact based Discussion. Lots of useful information to learn! :)

  • @judmcc
    @judmcc 8 років тому

    Very informative. I seem to remember in the 1970s they were understating the watts to show very low distortions such as 0.001%.

  • @MyStonerMind420
    @MyStonerMind420 8 років тому

    Good info man!

  • @BatSam948
    @BatSam948 7 років тому

    wow. opened my eyes. thank u

  • @sals26
    @sals26 8 років тому

    Great video as usual Gene, I remember your earlier one on power ratings and meant to make this post back then.
    As a very old school audiophile I remember seeing this kind of thing go around before.
    In the 60-70s some amp- receiver builders started using things like peak, instantaneous power figures to quote ratings, any kind of hokey thing they could think of to inflate the numbers. It took a intervention by the FTC to bring any honesty or integrity to the process. I think once again the FTC should step in and put their foot down on a advertised power and bring some sanity back.

  • @adinahirschmann3112
    @adinahirschmann3112 6 років тому

    THANK YOU for your honest, thorough and informational video. It was a good review of what I learned in my college physics class. BTW, nobody listens to just one channel in a home theater setup. BTW, the range of human hearing is 20 to 20, 000 Hertz.

  • @SwirlingDragonMist
    @SwirlingDragonMist 8 років тому

    Keep fighting the good fight brother!

  • @naturebyfrank
    @naturebyfrank Рік тому

    Very informative video👍👍

  • @samo8204
    @samo8204 4 роки тому

    Thank you Gene!

  • @jonsingh90
    @jonsingh90 8 років тому

    Awesome video!