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Re: Here's some interesting stuff. . .
St_PatGuy #148517 09/30/06 05:02 PM
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Holy jeebus! That is... yes, indeed, a price. Yow.


*also missed it first time through.


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Re: Here's some interesting stuff. . .
Ken.C #148518 09/30/06 05:42 PM
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axiomite
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I think the question is how much would you have to spend, and how many boxes would you have to buy, to get the same performance and 700w/channel headroom from existing products.

I think Axiom is doing the right thing bringing the "no compromises" product out first though, even if it is "OMG!" expensive. One of Axiom's great strengths is making really nice products at a decent price; I doubt Ian will throw that out the window with the electronics products.


M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8
Re: Here's some interesting stuff. . .
bridgman #148519 09/30/06 06:11 PM
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C
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Yeah, I figured we'd see different amplifier options after this big-guns debut product, but I keep having to exercise my patience with everything I want anymore. I forgot how to be content with little things.

One thing I still haven't found in my lazy LAZY research is whether the channels in these multichannel amplifiers can run at different impedances, or do they all have to run at the same? I would think that with the variety of speaker options, they'd have to let each channel run at its own selectable impedance, but I still haven't read that anywhere.

C.V.

Re: Here's some interesting stuff. . .
Ken.C #148520 09/30/06 06:53 PM
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local
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Let's see, I can get a new amplifer or a nice used motorcycle for the same price. Pretty easy decision for me.

Perhaps they will come out with a two channel version that is a lot more affordable for us working slobs.


M80ti's, VP150, QS8's
Re: Here's some interesting stuff. . .
CV #148521 09/30/06 07:55 PM
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It's not a matter of selecting an impedence; you're just presenting a load to the amp. It doesn't really care if all the loads are the same or not.


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Re: Here's some interesting stuff. . .
Ken.C #148522 09/30/06 09:27 PM
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I guess I don't get why a certain wattage rating is attached to each impedance, then. Obviously I wouldn't want to run that amp to drive one or two M80s at 4 ohms, because that's rated at 700 watts, whereas the max for the M80 is 400 watts? Instead of impedance, would there be a selection for how many channels are being driven? That's all. I'm just wondering how the amp knows the maximum amount of power it should be sending on to the speakers, and why isn't it possible to have different caps on that depending on the channel.

C.V.

Re: Here's some interesting stuff. . .
CV #148523 09/30/06 09:41 PM
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Ahh, this one is (probably) easy. The amplifier power supply has a certain voltage. That voltage is enough to give you 350 watts into 8 ohms. If you connect a load with half the impedence (eg. 4 ohms) then in theory you get twice the power, eg. 700 watts because power = voltage (same) times current (twice as much). This doesn't work for most amps because they can't put out twice as much current. The new Axiom amp seems to have no trouble putting out twice as much current (into 4 ohms) or 4 times as much current (into 2 ohms).

In other words, every receiver and amplifier on the market will put out twice as much power into 4 ohms as 8 ohms unless it can't handle the increased current draw.

Most can't handle the increased current draw.

This is why only a few brands are recommended for use with M80s -- those are the ones which can handle the additional current that gets fed into a 4 ohm load vs. an 8 ohm load.


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Re: Here's some interesting stuff. . .
CV #148524 10/01/06 04:28 AM
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C.V., the reason that an amplifier has a different wattage rating when driving different impedance speakers is simply because, as John B. points out, when the impedance of the speaker is lower the amp can put out more power, so there's a number given which was measured when it was tested in the lab with the lower impedance load.

An amp has a given amount of gain that it applies to the signal coming in from a CD player, etc. The stronger the incoming signal(which can be raised or lowered depending on the volume control setting), the more power is output; it doesn't matter what the capability of the speaker to handle power is. Keep in mind that regardless of what the maximum power rating of an amp is, a comfortably loud average listening level needs an output of only about 1 watt and even on brief peaks the maximum power capacity of a very powerful amp will probably never be used.


-----------------------------------

Enjoy the music, not the equipment.


Re: Here's some interesting stuff. . .
JohnK #148525 10/01/06 09:04 AM
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I appreciate the responses! I'll learn something yet.

C.V.

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