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M80's with Yamaha 1800
#289817 02/01/10 08:38 PM
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Hi , thinking of finally taking the plunge for M80's but being as they are 4 ohm's , has anyone one mated them up with a Yamaha 1800 or 1900 model .

I am currently running Image Dynamics car speakers mounted in a cabinet with 2 6.5 woofers and a tweeter which are 4 ohm with no issues. ( guess i am answering my own question):-)

On a side note , i listened to the kef C7's on the weekend and was not impressed for the 800 dollar price range , my current set up blew them away .


XPA-3
VP-180v3
M80v3
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SVS SSS-2
PS-3
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OPPO BDP-93
Anthem MRX500
Re: M80's with Yamaha 1800
PTPlayers #289839 02/01/10 10:27 PM
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I see that the 1800 is rated for 130W per channel, I have a RXV2700 rated at 140W per channel, the 2700 has an impeadance slector two switch to 4ohm if you need it..not necessary to run M80 with this amp. I shot off an e-mail asking Axiom if the 2700 could run them find and they said there should not be a problem.

I donot see an inpeadnace selector onthe 1800 but I would think that you should be able to run the M80's with that AVR. Just shoot the tech e-mail a note and they will get back to you.

Later
Phil

Re: M80's with Yamaha 1800
PhillipD #289844 02/01/10 10:42 PM
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I would not recommend changing the impedance switch to a lower setting, your just limiting the current by doing this...


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


Re: M80's with Yamaha 1800
SirQuack #289863 02/02/10 12:08 AM
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Limiting the current actually makes damage to the speakers more likely, to amplify (ha) on Randy's note.

I think I've heard of people using a 1900 with M80s, but don't quote me on that. I use a Harman/Kardon AVR525, which is rated at something like 85WPC into 4 ohms, so you can't just look at the watts RMS value and figure out if it'll be stable with M80s (or any 4 ohm speakers).


I am the Doctor, and THIS... is my SPOON!
Re: M80's with Yamaha 1800
PTPlayers #289901 02/02/10 02:56 AM
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PT, yes you're answering your own question to a considerable extent by noting that you have no problems now with 4 ohm rated speakers. You should also note that the M80s have slightly higher sensitivity than average and so require less power than many other speakers, and that over a majority of their frequency range they could be rated at 8 ohms.

As to a setting on the receiver for lower impedance, as was said, this should never be used. All it does is limit the voltage(not current)which the power supply section can output with a resulting reduction in current and power capability(Ohm's Law). This helps satisfy UL requirements to help prevent overheating, but tests have shown that it cuts maximum power capability roughly in half.


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

Enjoy the music, not the equipment.


Re: M80's with Yamaha 1800
JohnK #289903 02/02/10 03:13 AM
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so lowering the voltage, results in a reduction of current, so I was right. \:\)


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


Re: M80's with Yamaha 1800
SirQuack #289912 02/02/10 03:41 AM
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Ok, now explain how limiting voltage is harder on speakers?


My Stuff :

M80's
QS8's
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Denon 4802
Emotiva XPA-3
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Re: M80's with Yamaha 1800
Micah #289915 02/02/10 04:00 AM
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It's much easier to drive receiver into clipping the with the switch in the 4 ohm setting due to the voltage being significantly reduced.


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

Re: M80's with Yamaha 1800
Wid #289923 02/02/10 04:31 AM
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I see, and clipping is detrimental to a speaker then you're saying.


My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD
Re: M80's with Yamaha 1800
Micah #289925 02/02/10 04:33 AM
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I'm saying.


Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud

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