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Re: vp-180 or xp-3 amp
#305836 05/10/10 04:53 PM
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patwho Offline OP
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Yes i have a ep350

Re: vp-180 or xp-3 amp
patwho #306810 05/17/10 12:13 AM
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Well i purchased the vp-180 and then realized that my Yamaha 1800 would not drive it so i ordered the xpa-3 as well which should show up at my door tomorrow .

Hard keeping up with the jones'


XPA-3
VP-180v3
M80v3
Svs PC-12 Plus
SVS SSS-2
PS-3
Sharp 60" LED
OPPO BDP-93
Anthem MRX500
Re: vp-180 or xp-3 amp
PTPlayers #306813 05/17/10 12:36 AM
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Why do you think your Yammy won't drive it?


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB SonyUBPX800


Re: vp-180 or xp-3 amp
PTPlayers #306819 05/17/10 01:54 AM
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Yes, PT; how is it that you "realized" this? It would seem to be necessary to try first, and you've mentioned before that you had no difficulty driving 4 ohm rated speakers with your 1800. Keeping up with the Joneses shouldn't be the object where the topic is audio technology.


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

Enjoy the music, not the equipment.


Re: vp-180 or xp-3 amp
JohnK #306820 05/17/10 02:08 AM
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axiomite
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John. I checked. The Jonses still have an HTIB, so no worries there. ;\)


Fred

-------
Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
Re: vp-180 or xp-3 amp
SirQuack #306825 05/17/10 02:23 AM
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 Originally Posted By: sirquack
Why do you think your Yammy won't drive it?


Main speakers will drive 4ohm but center from what i read and have been told will not .


XPA-3
VP-180v3
M80v3
Svs PC-12 Plus
SVS SSS-2
PS-3
Sharp 60" LED
OPPO BDP-93
Anthem MRX500
Re: vp-180 or xp-3 amp
JohnK #306826 05/17/10 02:25 AM
Joined: Mar 2009
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 Originally Posted By: JohnK
Yes, PT; how is it that you "realized" this? It would seem to be necessary to try first, and you've mentioned before that you had no difficulty driving 4 ohm rated speakers with your 1800. Keeping up with the Joneses shouldn't be the object where the topic is audio technology.


The Joneses is a joke with a friend of mine


XPA-3
VP-180v3
M80v3
Svs PC-12 Plus
SVS SSS-2
PS-3
Sharp 60" LED
OPPO BDP-93
Anthem MRX500
Re: vp-180 or xp-3 amp
PTPlayers #306828 05/17/10 02:48 AM
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Posts: 7,786
axiomite
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 Originally Posted By: PTPlayers
Main speakers will drive 4ohm but center from what i read and have been told will not .

I find it hard to believe that Yamaha would use a different grade amp for the center channel than the mains.

If you're receiver can drive the M80s, it can also drive the VP180.


Fred

-------
Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
Re: vp-180 or xp-3 amp
fredk #306862 05/17/10 02:08 PM
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Hi Fred,

Not necessarily. If you delve into the specs of some AV receivers, you may find the power output rating for the center channel is measured at a single frequency (1 kHz) rather than over the full audio bandwidth (20 Hz - 20 kHz) and the distortion spec is higher, all of which suggest that some shortcuts have been taken for the center-channel amp. With a 4-ohm center, the VP-180, the center amp might be prone to current limiting/overheating/temporary shutdown when stressed.

Cheers,
Alan


Alan Lofft,
Axiom Resident Expert (Retired)
Re: vp-180 or xp-3 amp
alan #306878 05/17/10 04:10 PM
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Alan,
After reading your post, I checked the specs for my Denon AVR-3806:

Power amplifier
Rated output: Front:
120 W + 120 W (8 Ω/ohms, 20 Hz ~ 20 kHz with 0.05 % T.H.D.)
160 W + 160 W (6 Ω/ohms, 1 kHz with 0.7 % T.H.D.)
Center:
120 W (8 Ω/ohms, 20 Hz ~ 20 kHz with 0.05 % T.H.D.)
160W (6 Ω/ohms, 1 kHz with 0.7 % T.H.D.)
Surround (A, B):
120 W + 120 W (8 Ω/ohms, 20 Hz ~ 20 kHz with 0.05 % T.H.D.)
160 W + 160 W (6 Ω/ohms, 1 kHz with 0.7 % T.H.D.)
Surround Back:
120 W + 120 W (8 Ω/ohms, 20 Hz ~ 20 kHz with 0.05 % T.H.D.)
160 W + 160 W (6 Ω/ohms, 1 kHz with 0.7 % T.H.D.)
Dynamic power: 140 W x 2 ch (8 Ω/ohms)
210 W x 2 ch (4 Ω/ohms)
Output terminals: Front, Center, Surr. Back 6 ~ 16 Ω/ohms
Surround: A or B 6 ~ 16 Ω/ohms
A + B 8 ~ 16 Ω/ohms

Do you think I should be concerned since there is no 4 ohm rating, and even at 6 ohm, all channels are only rated at 1 kHz. I have never had a problem with it, but like you say, I'm forcing it to drive three 4 ohm loads and four 6 ohm loads now.


LFR1100 Actives,QS10HPx2,QS8x2,EP800,M3x4,M3x2 (Wood),M5HPx2 (Wood),AxiomAir,ADA1500-8,ADA1500-7
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