What Specs to Look at when Buying an Amplifier?
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- Опубликовано: 28 июл 2024
- This is part 3 of 3 livestream with Anthony Grimani and Don Dunn relating to what specs are most important when purchasing an amplifier. We tie in everything we spoke about in the last two livestreams and give some generalized advice on what type of amplifier work best for your scenario.
Understanding Specs in Amplifiers & Receivers: • Understanding Specs of...
Power Consumption vs Power Output: bit.ly/3wwDvpW
All Channels Driven Amp Test: bit.ly/2QUaAwW
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Had to stay up late to watch the recording of this and I was so interested to hear the absolute phase thing. Never knew that but makes total sense. Great presentation and I can’t wait for the next one!
Very well done! Anthony, you remain a huge credit to the industry!
Thank you so much! So many areas of minutia to think about that some of us beginners (me) wouldn’t know to look for. Can’t wait to see your next video! Best part of my week! Every week.
Kudos, well done & thank you guys for the electronics chats with Mr. Grimani! 👍
A quick story of thanks to Anthony if I may.....
Am spending a July 4th weekend watching / rewatching [clearly by my new comments relative to your publication date(s)] many of your various "series" vids w/ Anthony as I fabricate my custom spkr & line level cables for friends & clients which I still call a hobby but that is also so enjoyable & therapeutic. Started with your 3+ "Amp Chats" early before sunrise and am closing in on the end of the 3rd vid at lunch time; I often rewind & replay MANY segments simply to drive a subject/chapter home. =Nerd Fun while I work!
Having followed AG for decades & attended many seminars over two decades at CEDIA, an AES I believe, and some other events, I've been blessed to make a living in the higher-end custom HT market and corporate boardrooms & facilities WITH a 2ndary focus, always, on aesthetics of the media space / room with my AID interior & architecture friends.
I attribute some of my success & certainly career direction to Anthony going back to the early 2000s unbeknownst to him of course and so I wanted to share my history + send a brief note of thanks to AG and you Gene. 👏 ♥
All the best.
Ah the best part of my week, waking up to a new Audioholics steam! Great content as always guys!
I really like these videos, this channel. I don't care if some videos are 2 hrs long I will always watch them when I have the time!
Cheers you guys 🍻!
Long video but worth every minute of it. Thx guys
Liked the 3 part series. Anthony mentioned certain KEF speakers as having pretty flat impedance over frequency. KEF 107's were measured by DB Keele in the Feb'88 Issue of Audio to have an impedance magnitude between 3.6-4.8ohms from 20Hz-20KHz.
Great video.
Funny enough, when you talked about damping factor (I learned a lot), saying it was a spec not published anymore, I thought about Accuphase, which still publish it, with a lot more.
I think that it is a key take away: do not even consider a brand that does not publish those specs and measurements.
Best video series I have listened to date
Great video. Thanks!
Cudos and thanks to Anthony Grimani. Besides AudioScienceReview, the best info on Audio anywhere. For info on amps, the best, bar none. What I still don't get is when it important to focus on volts when on watts. E.g., why is it S/N at 1W or 2.8 V, but not at 0.35A, which would be equivalent. Why not? And loudness = volts, but there is lots of talk about current (= amps) delivery. Why once focus on V/U, other times on A/I?
Best amp info I’ve heard in 40 years around av and stereo… harkens back to Julian Hirsch topics
Great show guys👍🏻
@30:55 there is test CD signal for polarity checking , it shows very well !!
Looking forward to Paradigm Founder series reviews….specifically 100F. Let’s go!
@21:00 Gene, please correct me if I'm wrong but it's my understanding that the port is at the bottom of the two peaks when measuring a loaded woofer in a ported box. It's not at the highest 1st peak.
I think Anthony is remembering that the unloaded subwoofer resonance is at the peak and there will always be a single peak. But once you take that subwoofer and put it into a box that is tuned to a certain frequency then the impedance of that loaded woofer will be the middle of the two peaks.
A really great way to verify this is to open WinISD, load any subwoofer in any port design and look at the Port tuning frequency and then look at the impedance graph.
Thank you!
What I want is a specification that describes the broadband hum/ hiss amps often pass through to speakers. So in other words, the noise floor of the amplifier as revealed by a standard high sensitivity driver, like 100db sensitivity. This would be functionally similar to the "self noise" rating of an active studio monitor, except using a standard sensitivity driver allows you to estimate how much noise you will hear through your speakers.
Hi from Singapore - the heat and humidity is real! Thank you for running these series, I have learnt a lot from the sessions!
Glad your focus is on home theater, not 2 channel, (AB amp w/MG20.7's)
I was wondering if you could provide information or suggestions on an affordable upgrade to my power problem. I have th Focal 806 with matching center channel speaker and the 605 rear speakers. I am currently driving these speakers with my Onkyo Rz820 AVR so I know that power is not the best. Is adding a 5 Channel amp going to give me the great sound and separation to the channels or is it separates only that will achieve this?
And what affordable options for a 5 Channel amp?
Thanks in advance for your help 👍
Thank you so much for this video, it is really useful.
I have a question regarding the specs of some PA amps which offer a huge amount of power at a low price.
Some of these amps have a good S/N ratio (well over 90) and good damping factor (well over 50), but THD is usually "< 0.5 "
Could it still be used for a home hifi setup?
Great chat. I studied cognitive psychology and psychophysics in the early 80s and the information about the auditory nerves firing on the negative side of the waveform (rarefaction) is new to me. There is some great information here from people who have a profound amount of experience in their fields. I thoroughly enjoyed this. Gene, we love you but ease up on Don a little. Be a little more patient and don't cut off his mic. The dynamic between you three is entertaining. Just my two cents! Keep up the great work! Will you ever have Sean Olive on a chat? He too has vast experience (scientific and empirical), is old school and no nonsense. I'm sure you two would have some very interesting ideas to share. Maybe get Dr Floyd Toole on at the same time (if he's willing) and have a chat about the evolution of audio and how we got to where we are.
Hi Audioholics. Do you have an updated recommendation on an amplifier in 2021 within the $1,000 (or less) range?
Question! Is it possible to series and/or parallel a pair of Klipsch R-14S surround speakers(8 ohm) off of a Yamaha RX-V6a receiver for home theater use?
Great video as always, I will be buying the new Yamaha RX-A8A but when will Yamaha and other companies offer class D receivers?
Pioneer SC-LX904 and SC-LX704 and NAD T778
Never .... Hopefully
Please drop the names of the amps that inverted
Im watching on my MacBook and the mic/amp problem sounds like rolling thunder. Nice! Leave it alone!
Ground lift isn't dangerous regardless how it's accomplished, because neutral is ground in your breaker panel. In other words, your green and white wire all go to the same point source, so when you lift the ground the only thing you are changing is the chassis ground or the input ground from chassis. All inputs should be isolated anymore so this never becomes an issue and on some equipment they are isolated.
Push Pull Pentodes w/tubes or ab amps, switching amps will never ever get there, glad ur focus is on HT
I was wondering in an avr with assignable amps are all the amps equally rated ? I'm asking because I was going to bi amp my front towers .
Depends on the AVR. I have an Arcam AVR300 with a true 7 x 100wpc. It has a built in bi-amp setting for channels 6 & 7 to power the mains with 200wpc. However, many modern AVR’s don’t have equal power on all channels, unless it’s a high end one like Arcam or Anthem.
Ok thank you I have a denon avc a110 anniversary 150wpc. I know im not getting 300 per channel but it sounds great . So guess thats what matters. Thank you again for the response.
@@toddfolmsbee2429 the specs are listed as 150wpc @8 ohms full range into 2 channels only. You will have to check the user manual to check for bi-amping options. Or buy a 2 or 3 channel power amp for the fronts and center.
I should have proof read better i do have it bi amped thats why I said 300wpc .
@@toddfolmsbee2429 given the stated specs, it’s doubtful that the bi amping is giving a full 300wpc.
I will never leave Yamaha Pro-Audio amplifiers. Everything discussed in this 3 part series, Yamaha has complied with. You can't go wrong with Yamaha. Their Pro-Audio division is pristine and proven...
Don debonair Dunn.Just the ultimate in cool.
Yeah! LoL! Legend in my own mind. ;-)
@@DigitalDonAV Don you and gene are legends keep up the good work.
"Don, STFU" LMAO!
Seasoned pros shooting straight.
Aw Don got muted, but why!?! He's a cool dude!
I see Crown amps in the thumbnail. If commercial theaters use Crown amps then why isn't as popular with Home Theater enthusiasts? Wouldn't you want to use what they use? I mean we've all been in these mega huge theaters and their sound is huge and with amazing clarity and crazy dynamic range.
You talk about noise on the crown amps If your listening to music at more 10 watts you will not notice the noise being ground hum or floor noise or fan noise the reason theatres use crown power amps or other pro amps is because like you mentioned power at a reasonable price in the old days I worked at a cinema and in the best theatre we used an old Ashley power amp and it sounded amazing dynamic and all of it’s good for the commercial realm it’s good for your home
Datasat rs20i best for me )
Arcam makes Class G amps. There is very little information out there about Class G. It would be nice if Audioholics could do a segment on Class G.
Hitachi boldly made one of the first Class G amps (Dynaharmony) for mass market back in the late 70s. I think the technology has improved over the years to render the switching distortion virtually inaudible.
Class G and H are trick forms of AB with multiple voltage rails. It’s supposed to be very efficient and very powerful.
@@jstoli996c4s and @Daryl Loth, that’s good to know. Thanks for the info. I’ll have to read up on those topologies one of these days. I’m just now experimenting with transistor-based push-pull amplifier circuits.
lol, i want anthony to take a 190 swapped grom for a spin. i will say put your brown pants on first buddy lol. you havent lived until you went 90+ mph on 12" tires let me tell you haha. another good one would be take a 450 supermoto for a spin. you def better be wearing brown pants for that ride. the supermoto is so nuts its mental. if you think harleys are something ride a 450 sumo. they are a blast but boy are they nuts. i had a honda reflex that said it was goin 75mph which wasnt too bad. on another note though i ran across a crown ce4000 recently for 300 bucks. i want to drive 2 ultimax 18's for home use. 2 questions, is that model crown any good? and is 300 a good deal for it? im new to this whole thing and simply dont know. it says made in usa on the back of it. now im not sure how much was made or if it was simply assembled. either way im a huge fan of us stuff period. great video gentleman btw. i know this vid is old but it seemed like the proper vid to ask the question. thanks in advance as well.
Gene have some chocolate look at Anthony his always smiling and Don shut the f%$##%%$ up lol on the subject of 'GOOD BEHAVIOR' great show guys
Because of the way percussion and string instruments vibrate absolute phase has no meaning. For wind instruments bad singing the leading edge us always a compression wave. Some people can hear a difference and some can't.
Why is Don Dunn is so Anti-Crown? I would like to find anywhere on the web, that can explain to me "Why Crown amps are so bad. Especially the model XLS 2502 Class D amps. I am not a Crown fan boy, but, I never bash a particular brand unless for good reason. I have not heard a comprehensive reason from Don about his stance on Crown amps.
I am not anti crown, I tried a couple of crown amps over the years on many high resolution speakers. I found them to be noisy and harsh sounding, however I used to feel this way about class D and my mind has changed. That being said, Harman is a great company and I am going to try out some of the newer crown amps...I am open minded. I am a "need to hear myself" kind of guy, I have tried many products over the years that people swore by, but found them to be wanting. One benefit of being in the business so long is the ability to actually jam out gear in my own home, take time and dig into them with ours of critical listing. If the new crown's are as good as many people say, I'll eat my words. :-)
@@DigitalDonAV yeah i know what you mean. people said the rsl 12s is amazing and im sorry but its trash. i learned that i too am a i need to hear it myself. the impact of that thing is garbage. it doesnt get very loud neither. i have a bluetooth jbl sub for a soundbar that beats it. never mind the long story about them blaming my reciever. i buy a new one ansd still have trouble. they then try to blame my equipment. i laughed at that point. i said oh your blaming my brand new reciever as the problem. i dont think so
No name dropping???
How can we make an educated purchase decision if we don’t have this info? Seems like he doesn’t want to help the public!
Home Theater Systems is not audiophile and class D is good for it you never hear different, but if you listen to high resolution audiophile music with 24bit -144dB noise floor , I can tell you can NEVER GET IT WITH CLASS D, if you design DC/DC converter ( which is the same PWM controlling ) you will see how bad it with different load , CLASS D AMPLIFIER WILL BE NEVER AUDIOPHILE AMPLIFIER . but on the other hand they are good public amplifier when you need 10000 W for big stadium .
Sounds plausible to the uninitiated but what your stating is actually NOT factual. Many Class D amps today are SOTA and as good or better than the best linear amps.