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Re: So what HT gear are you lusting for tonight?
Micah #305854 05/10/10 06:03 PM
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Micah, afraid you still have a bit to learn.

Yes, the speaker is part of the circuit, but it doesn't "draw" anything, it only impedes the flow of current supplied by the amp.

An amp, with both terminals shorted together, i.e. no speaker, just wire, would flow as much current as it could move. Something would fail, probably the output transistors, but it could also over-heat the power supply, or if it was a seriously robust amp, that much flow through the piece of wire could melt it.

What happens when you put a speaker in place, it that its has a really, long, thin piece of wire (to simplify things), that keeps the current flow under control. Speakers of higher impedance slow the flow even more. But if there's enough current, it can still put so much through the speaker that it can cause heat to build up. If you get the wire hot enough you can melt the insulation off of it, and that long, thin piece of wire starts to look more like one big lump of metal, and then other things start to break. There's also the possibility of over-extending the cone and causing physical damage that way. You ears will be telling you to turn it down before you get to that point.

The real problem is under-powered amps. Either having a speaker which can flow current more rapidly than the amp can stably provide (which will cause it to go into protection), or the amp just running out of steam and not being able to provide the highest peaks (clipping).


Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris
Re: So what HT gear are you lusting for tonight?
ClubNeon #305855 05/10/10 06:05 PM
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Right now I'm lusting after:

Blinds, dual cell, black outs. Probably from Bali Blinds.
Two air conditioners, one for my bedroom/computer room, and one for the rest of the apartment.
A Buttkicker.
A trip to Romania (doesn't really help my home theater, but helps my general mood, and thus my enjoyment of the theater).


Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris
Re: So what HT gear are you lusting for tonight?
Micah #305858 05/10/10 06:25 PM
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 Originally Posted By: Micah
Oh my 'lust list' eh? Ok, well I was just fine with my VP150 until Steve came along! (Waves fist in air while closing one eye & squinting with the other one)... So now I want to audition the VP180, expecially if the reports are true that I can get around $350 bucks for my VP150 in the trade-up program! \:D

Besides that I'm looking to get two more QS8's for the back surrounds, and possibly another two for the front height channels... Which brings me to my next lust item, either a new reciever or a pre/pro. I've always loved Denon recievers for their ablity to split up the rear surround channels into 4 separate speakers so that combined with the side surrounds you can have a total of 6 surround speakers. But now I'm also interested in the front height channels, and I would like all of this in a fairly affordable reciever (read - $700 or less) because I'm more interested in the processing capabilities than the built in power amp. I would like to get a second Emotiva XPA-3, and run my QS8's with it and get mono-blocks for my M80's & (probably) VP180.

Which brings me to my next question, I've always had a backwards idea of the way speakers used power. I thought that you sent power to a speaker, and it used whatever power you sent to it. Now, thanks to the great minds on tap here on this site (John, Fred, Chris, Dean... just to name a few), I've come to understand electricity a little better (though I'm certainly no pro just yet). The way I understand it now, the speaker is part of a loop in the circut, and it draws power from the amp as needed. So now what I'm wondering is, how much power will an M80 draw during peaks if driven at pretty much full volume? They are rated at 400 watts, so does that mean they won't ever draw more than 400 watts? Or is that just an average?

The reason I ask is because I was talking with a guy about amps and he told me if I really wanted to run them loud, without fear of clipping EVER, then I should be looking at getting at least 1000 watt mono blocks, for each speaker. And that confused me since the 80's are rated at 400 watts. Does this mean that during peaks they could draw as much as 1000 watts, or at least somewhere close to it? And if so, that much power won't damage them, will they?

With my previous understanding of the way speakers worked I always thought if you sent 500 watts to a speaker that was only rated to handle 300, you would 'blow' that speaker. But now as far as my understanding goes, the speaker will only draw as much as it's designed to draw... am I right about that? Or do I still have some stuff to learn?


I'm pretty sure the 400W rating of the M80's is a sustained rating, so it is entirely possible they can handle greater than 400 for peaks, but the Ti tweeters would likely blow (along with your hearing) if fed 1000W sustained.

Re: So what HT gear are you lusting for tonight?
#305859 05/10/10 06:26 PM
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If you're peaking at 1000 watts, you'd better have a huge room or some very, very serious earplugs.


I am the Doctor, and THIS... is my SPOON!
Re: So what HT gear are you lusting for tonight?
Ken.C #305860 05/10/10 06:27 PM
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 Originally Posted By: kcarlile
If you're peaking at 1000 watts, you'd better have a huge room or some very, very serious earplugs.


Agreed!

Re: So what HT gear are you lusting for tonight?
#305862 05/10/10 06:37 PM
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Was this "guy," a salesman, by chance?


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Re: So what HT gear are you lusting for tonight?
Ken.C #305863 05/10/10 06:43 PM
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The M80s are "rated" at 400 watts, but they are stress tested at much higher levels, somewhere around 700-800 watts if I'm not mistaken.


Half of communication is listening. You can't listen with your mouth.
Re: So what HT gear are you lusting for tonight?
Adrian #305864 05/10/10 06:45 PM
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Oh, higher than that, I think.


I am the Doctor, and THIS... is my SPOON!
Re: So what HT gear are you lusting for tonight?
Ken.C #305865 05/10/10 06:47 PM
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I've started thinking that if I replace my 46" DLP with a 55" or 58" flat screen that I wall-mount, I can use the space on top of the cabinet (where the TV sat) to put a VP-180.

Oh, and I still want 2 or 3 Outlaw monoblocks.... especially if I got a VP180! \:\)




::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
Re: So what HT gear are you lusting for tonight?
Ken.C #305866 05/10/10 06:52 PM
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 Originally Posted By: kcarlile
Oh, higher than that, I think.

When I toured the factory, I thought Tom or Debbie told me something like 1000 watts but I'm not sure, so I didn't want to overstate the power capabilities of the M80s. You know Micah's reading this right now and thinking to himself, "Great!! they torture these speakers at 1000 watts, so I'll go ahead and get me a 1000watt amp!"


Half of communication is listening. You can't listen with your mouth.
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