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Rick @ Musicraft
Musicraft (Derby), Specialist Hi-Fi/AV & Multimedia Dealer
good accurate audio monitoring and good sound reproduction to all
I've done it for you, with a little help from Dynaudio.
If 100dBs @ 10m is proportional to 117dBs @ 1m, then the BM5Aa can manage that at peak. As I have said, the ADMs provide more headroom than the BM5As, (which I also had) and are louder, but quite how much would need to be tested. Loud enough in most cases though for sure.
Back to back, the ADM9s were obviously louder than the BM5As and stayed composed at those levels as well.
let me help you with your calculations further OD.
if what Dynaudio claims is true, i.e. 117dB peak @ 1m
and if your statement is also close to being accurate, ie 100dB @ 10m equating to 117dB @1m, then there is every likelyhood that that the ADM9s match or exceed this figure. In fact, having heard both back to back in the same room, I know that the ADM9s surpass the Dynaudios in the volume stakes by some margin, calculator not required (hearing protection mandatory though).
When you listen to the pair you will be able to take your own measurements, until then, you will have to rely upon your theoretical knowledge.
Perhaps you might like to ask Dynaudio how they came by their measurements, they might be able to help you better understand.
Looking at the Dynaudio website, it's highly likely that Dynaudio are exagerating their maximum sound pressure levels too.
2 wrongs don't make a right.
Overdose, when you did your ADM 9.1 vs BM5A loudness test, did you take any measurements with a sound pressure meter?
I will nominate an amp and speaker combination that can play in excess of 117dbs at 1 metre and therefore in excess of 100dbs at 10 metres. They will play these volumes continuously - 24 hours per day 365 days per year without clipping and without damaging the speakers. An examination of the technical specs of this amp and speaker combination will explain why they can do that. An examination of the engineering behind the amp and speaker combination will explain how they can do this. Independent laboratory tests will back up my statement that they can do this.
The amp is a Urei 6290. The speakers are EV Patrician 800's. Now Overdose, I challenge you, or anyone else to get your AVI ADM 9.1 speakers together with any amp and speaker combination that can genuinely and believeably do 117 dbs continuous without clipping and to do an extreme loudness listening test. There's a very high chance that the AVI's will be clipping at volumes well below 117 dbs and that this will be all too apparent in such a comparative demo.
Can you or anyone else explain how the AVI speakers that are about 85dbs/2.83v/1 metre efficient, that have built in amp packs that can deliver only about 80 to 100 watts continuous into 8 ohms before clipping can produce clean peak levels of 117dbs at 1 metre? The speaker efficiency isn't there. They are small conventional cones and domes. The speaker power handling isn't there - they are only small speakers with a single mid-bass cone and a single tweeter. The amplifier power transformer size isn't there. The amplifier power supply capacitance isn't there. The cooling for the class AB amplification isn't there. They have relatively small cooling fins and no cooling fan. The engineering simply isn't there for them to deliver 117 dbs.
They go louder if u turn up the volume or turn up the hearing aid volume. Deaf people will find them less loud. I am really interested in the scientific analysis of loudness as I am with hottness. Never thought my microwave heated my ready meal enough but turning up the volume helped. Doh!
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I think you misunderstand my replies as actually caring about the figures.
Whilst yourself and Oldric seem to have a handle on some facts and figures, it appears to me to come from an enthusiasts perspective, much the same way as a train spotter might relay various minutae regarding technical data and serial numbers about a train, compared with say an actual train engineer/technician who would really know how it worked. You won't find your answers on the interweb, you need to do the actual work.
Apologies if you are, or have been electrical or electronic engineers yourselves, but you just don't come across as anything other than from an amateur DIY level.
If you want to test or verify the speakers, simply buy a second hand pair, test them and move them on. Job done.
The rationale that you pair can't understand how various figures are arrived at, therefore the data is flawed, could easily be seen as a lack of understanding and knowledge yourselves, ie 'if I can't do it, then it must be impossible'.
Once again, I point you to the manufacturers respective technical departments for precise info, but given the way you ask questions, I'd imagine that you'd be given short shrift.
Once again, I've had/have, both the BM5As and the ADM9s and am speaking from direct experience of listening to the two and it is this experience that I am giving to the OP.
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I'm interested in Charlize Theron, but that's a different type of hotness and much more interesting.
You know that's Scarlett Johansson right?
It could, except in cases where clear mathematical reasoning has been given as to why it's not possible for the AVI speakers to perform as claimed, as has been given quite clearly at least twice in this thread.
The fact that YOU don't understand that is a lot more revealing to be honest.
Does that mean the AVIs don't sound good? No. It does mean the manufacturer is exaggerating somewhat though. There really doesn't appear to be any possible argument against that point.
Gosh! Have you just come back from patronising school or something??
Seriously, these are fair questions. They may be of no interest to you, but they are for others. I'm pretty sure with those figures you'd overload the drivers quick smart and be faced with expensive repairs.
More concerning is the effect on the OP listening at high volume. You can replace drivers easily, but your ears are something else!
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AVI sell these speakers on the back of these claims of power and that they can play at 100 db at 10 metres so its reasonable for potential customers to ask for proof of their claims.
AVI site take plenty of digs at rivals products with comments like ok if you like the sound of clipping ect so cant complain when facts and figures are asked for their product.
Would of been a worthy part of the review if WHF had set them up at 10 metres and measured how loud they can go when they reviewed them.
I think I might have worked out who is and/or who are the biggest.
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Yeah, her as well. Still hot.
I've got identical twins so are there any points available for having one with a high efficiency-rating?
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That really depends on the accuracy of the mathematical reasoning.
To be sure, someone could measure them for good old school objective info. Shouldn't be too difficult to achieve surely?
A member on the AVI site measured the power of the ADM and if i remeber right they were true power about 85 watts.
You can use numbers to make all kinds of claims but unless you know how they were measured they are meaningless really but a clam of constant 100db at 10 metres could of been a easy check for WHF when they reviewed them.
My Cyrus amps are 150 watts into 8 ohm and i think 250 into 4 but a peak of 1500 and if they were made by AVI they would be 1500 watts amps.
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