You are not logged in. [Log In]


Forums » General Discussion » Home Theater » M80's with Yamaha 1800

Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#289817 - 02/01/10 03:38 PM M80's with Yamaha 1800
PTPlayers Offline
veteran

Registered: 03/03/09
Posts: 129
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
Svs PC-12 Plus
SVS SSS-2
PS-3
Sharp 60" LED
OPPO BDP-93
Anthem MRX500

Top
#289839 - 02/01/10 05:27 PM Re: M80's with Yamaha 1800 [Re: PTPlayers]
PhillipD Offline
veteran

Registered: 01/19/10
Posts: 142
Loc: Grande Prairie, Alberta
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

Top
#289844 - 02/01/10 05:42 PM Re: M80's with Yamaha 1800 [Re: PhillipD]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13572
Loc: Iowa
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
Anthem AVM60 Outlaw 7700 Emotiva A500 Epson 5040UB



Top
#289863 - 02/01/10 07:08 PM Re: M80's with Yamaha 1800 [Re: SirQuack]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 18044
Loc: NoVA
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!

Top
#289901 - 02/01/10 09:56 PM Re: M80's with Yamaha 1800 [Re: PTPlayers]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10631
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.



Top
#289903 - 02/01/10 10:13 PM Re: M80's with Yamaha 1800 [Re: JohnK]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13572
Loc: Iowa
so lowering the voltage, results in a reduction of current, so I was right. \:\)
_________________________
M80s-VP180-4xM22ow-4xM3ic-EP600-2xEP350
Anthem AVM60 Outlaw 7700 Emotiva A500 Epson 5040UB



Top
#289912 - 02/01/10 10:41 PM Re: M80's with Yamaha 1800 [Re: SirQuack]
Micah Offline
connoisseur

Registered: 11/16/08
Posts: 1789
Loc: Indiana you hoser!!!!
Ok, now explain how limiting voltage is harder on speakers?
_________________________
My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD

Top
#289915 - 02/01/10 11:00 PM Re: M80's with Yamaha 1800 [Re: Micah]
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6789
Loc: The Peoples Republic of Il.

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


Top
#289923 - 02/01/10 11:31 PM Re: M80's with Yamaha 1800 [Re: Wid]
Micah Offline
connoisseur

Registered: 11/16/08
Posts: 1789
Loc: Indiana you hoser!!!!
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

Top
#289925 - 02/01/10 11:33 PM Re: M80's with Yamaha 1800 [Re: Micah]
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6789
Loc: The Peoples Republic of Il.

I'm saying.
_________________________
Rick


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


Top
Page 1 of 2 1 2 >

Moderator:  alan, Amie, Andrew, axiomadmin, Brent, Debbie, Ian, Jc 
Forum Stats

15,255 Registered Members
16 Forums
24,041 Topics
424,565 Posts

Most users ever online:
883 @ 03/04/17 05:06 PM

Top Posters
Ken.C 18044
pmbuko 16437
SirQuack 13572
CV 11677
MarkSJohnson 11444
1 registered (MatManhasgone)
193 Guests and
6 Spiders online.
Key: Admin, Global Mod, Mod
Newsletter Signup