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#283280 - 12/21/09 12:27 PM Re: ROTEL RECEIVER not RATED FOR 4 Ohm?, [Re: Wid]
alan Offline

connoisseur

Registered: 01/29/02
Posts: 3267
Loc: Toronto/New York/parry Sound
Hi Rick and all,

As I explained in a PM to Rick, impedance ratings by the designer are "nominal"--arrived at by eyeballing the overall impedance curve and picking a number that is kind of an average. Since the M80 impedance curve does touch 4 ohms at several places, and remains below 8 ohms up to nearly 1 kHz, for the sake of clarity, Axiom refers to the M8os as "4-ohm speakers". Actually, Ian Colquhoun, the M80s designer says they are closer to 5 ohms.

The point is that in the frequency range where the greatest amount of current is drawn, the M80s' impedance is at 4 ohms or slightly above that figure, so that's why we give it a nominal impedance rating of 5 ohms. To avoid confusion in the specs we call it 4 ohms.

Regards,
Alan
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#283285 - 12/21/09 12:51 PM Re: ROTEL RECEIVER not RATED FOR 4 Ohm?, [Re: alan]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 18044
Loc: NoVA
Aww, you could call them 5 ohms and give people another random reason to hate them!
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#283299 - 12/21/09 01:56 PM Re: ROTEL RECEIVER not RATED FOR 4 Ohm?, [Re: Ken.C]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13625
Loc: Iowa
I don't see what chart John is looking at. \:\)
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#283328 - 12/21/09 03:29 PM Re: ROTEL RECEIVER not RATED FOR 4 Ohm?, [Re: Ken.C]
Ascension Offline
veteran

Registered: 10/30/03
Posts: 130
Loc: Hutchinson, KS.
 Originally Posted By: kcarlile
Aww, you could call them 5 ohms and give people another random reason to hate them!


LMAO!!
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#283333 - 12/21/09 04:25 PM Re: ROTEL RECEIVER not RATED FOR 4 Ohm?, [Re: Ascension]
Adrian Offline
axiomite

Registered: 12/27/08
Posts: 6913
Loc: It's all about the location.
So, to conclude...the M80s are considered 4(5?) ohm speakers, for the most part, because they touch 4 ohms at lower freq's where they draw more power? If the charts showed they dropped to 4 ohms but much higher up in the fq's, then could they be considered 6-8 ohm speakers? If it is an average, wouldn't/shouldn't the lower fq's take precedent over higher ones?
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#283393 - 12/22/09 08:45 AM Re: ROTEL RECEIVER not RATED FOR 4 Ohm?, [Re: Adrian]
alan Offline

connoisseur

Registered: 01/29/02
Posts: 3267
Loc: Toronto/New York/parry Sound
Adrian,

Yes, yes, and yes.

Alan
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Axiom Resident Expert (Retired)

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#284512 - 12/30/09 03:09 PM Re: ROTEL RECEIVER not RATED FOR 4 Ohm?, [Re: alan]
Murph Offline
axiomite

Registered: 10/05/06
Posts: 6955
Loc: PEI, Canada
Do you think you should be shouting Adrian's name followed by "Yes, Yes, Yes" ?
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#284513 - 12/30/09 03:16 PM Re: ROTEL RECEIVER not RATED FOR 4 Ohm?, [Re: Murph]
Adrian Offline
axiomite

Registered: 12/27/08
Posts: 6913
Loc: It's all about the location.
\:o
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