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yamaha rx-v3900 questions
#316594 07/25/10 11:54 AM
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Ken_s Offline OP
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Since this receiver is on clearance for 999 @ local retailer and it has so many features I am going to snag one this week. My concerns (Dean answered a few of them in another forum and recommended coming on here) are the yamaha only supports 4ohm for the front main spkrs which I am looking at m80's should be enough but was mentioned that I should look at going to the vp180 than the vp150's due to them matching better. My room is huge 15x20 with vaulted ceilings all the way up pass the second floor. I also have a large dinning area that joins the living area. 5-6000 cubic ft I am guestimatin and looking to get an amp for the 4ohm issue in the future is a possibilty
The v3900 does support 6ohm center channel and I am wondering how this would effect the vp180 vs the 150. I think I would not benefit from running the vp180's at 6ohm. Also was looking at svs for the sub. im guessing the plus 12's should be sufficient. I will be 14ft away from the front speakers.

The next concern is the yamaha receiver has bi-amplification. I see on the axiom cust. page you can order the axiom sets with the biamp connection. Should I set these up this way? or use the more traditional way of hooking them up? Thank you for any info/recommendations/help.
Ken

The v3900 does support 6ohm center channel and I am wondering how this would effect the vp180 vs the 150. I think I would not benefit fromc




















Last edited by Ken_s; 07/25/10 11:57 AM.
Re: yamaha rx-v3900 questions
Ken_s #316602 07/25/10 03:36 PM
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Ken I forgot I should have mentioned that responses tend to be slow around here on the weekends. It’s not a big forum and most of these audiophiles seem to actually have lives. shocked Just give it until Monday at least.


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Re: yamaha rx-v3900 questions
Ken_s #316604 07/25/10 04:21 PM
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Hi Ken,

Historically, I used to advise forum members who were getting the 4-ohm M80s to avoid Yamaha and Onkyo and go with Denon, whose receivers generally seemed to be more stable into 4-ohm loads---even the entry-level models.

Since then, Yamaha and ONkyo have some upper-tier expensive units that will support 4-ohm loads. However, I think it's a bit "iffy" for you on the model you're considering if you use the VP-180 with M80 mains, ESPECIALLY in the huge room. Receivers just do not have huge power supplies and endless amounts of power into low impedances. If you want really excessively loud (to me) playback in huge rooms (and the M80s will do it cleanly when fed hundreds of clean watts), then you'll need an outboard power amp. If you use the VP150, it's easy to drive and a decent center (no match for the VP180) until such time as you have the stable 4-ohm power for all three front channels. You might find a Denon AV receiver that will do that right now if you don't demand ear-deafening playback like some demand.

Cheers,
Alan

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Re: yamaha rx-v3900 questions
alan #316610 07/25/10 04:55 PM
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Don't bother with the bi-amplification on any model of receiver. It's just there because "everyone else is doing it".

I do have to applaud Axiom for removing the dual set of posts from their new V3 speakers. They've long stood that bi-amping does nothing, but shipped speakers with the option built in, as a contradiction to themselves. Now, with the V3s, having the extra posts added means a 10 day wait is added to your order, because they are not normally assembled that way.


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Re: yamaha rx-v3900 questions
ClubNeon #316611 07/25/10 04:59 PM
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What happens when you try to play the speakers on a very high level and there is no enough power coming from the receiver? Will it shut down? Sorry for the noob question.


Believe those who are seeking the truth. Doubt those who find it.
Re: yamaha rx-v3900 questions
Ichigo_Kurosaki #316615 07/25/10 05:07 PM
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Unfortunately receivers don't shut down soon enough. When they run out of power to reproduce the requested waveform, they tend to "clip" the peaks of the signal off. This clipping is a very harmful form of distortion, which will eventually damage the speakers.

Left clipping long enough the receiver will shut down, but that may be too late. It's hard to describe in words how clipping sounds, but it's not good. If you turn a system up really loud and it starts sounding distorted, grainy, harsh, you've gone too far, ease off before you break something. Don't rely on the shutdown protection.

On the other hand, sometimes you can still push a receiver too hard without it running out of power. Using a speaker with too low of an impedance will cause the output devices to produce more heat than with a higher impedance speaker. If the heat builds up too quickly, the thermal protection of the receiver can kick in, and shut it down. That's not as dangerous to the speakers, as clipping, but the extra thermal stress on the receiver may shorten it's life. Plus it's annoying to have it turn off right when you're starting to rock out.


Pioneer PDP-5020FD, Marantz SR6011
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Re: yamaha rx-v3900 questions
ClubNeon #316621 07/25/10 06:26 PM
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Ken_s Offline OP
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thanks for the great info. biamp is defintely out. I am clueless about the denons or onkyo do you have a recommendation in the 1500 or below range that would rock the m80/vp180 stable. the 3808 i see is on clearance is there any issues with it? does it do video processing well like the yammy with the anchor bay chip? I do not know much about denon's except there manual can be a bit technical. Guess I need to read up on them. so which models are do's and which are dont's. We listen to movies/tv majority of the time and music about 20% or so. I want to go for the theater effect. thanks againg for all the great info. about the svs sub queestion I asked any recommendations that pair well or will the ep500 or 600 do the job. if i go with a svs i would need to wait a pay check or two to snag it. I see the denon 4310 for 1500 online


Last edited by Ken_s; 07/25/10 06:30 PM.
Re: yamaha rx-v3900 questions
Ken_s #316626 07/25/10 07:24 PM
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Several of the members here bought the 3808 when it was the hot item, and I think the approval is pretty much unanimous. I'll let the owners reply in detail. I'll say that some of the features make me jealous.

Re: yamaha rx-v3900 questions
ClubNeon #316628 07/25/10 07:53 PM
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Originally Posted By: ClubNeon

Unfortunately receivers don't shut down soon enough. When they run out of power to reproduce the requested waveform, they tend to "clip" the peaks of the signal off. This clipping is a very harmful form of distortion, which will eventually damage the speakers


This was my experience with my Denon 2807 which I never got to shut down but did get it to clip.

Originally Posted By: ClubNeon

On the other hand, sometimes you can still push a receiver too hard without it running out of power. Using a speaker with too low of an impedance will cause the output devices to produce more heat than with a higher impedance speaker. If the heat builds up too quickly, the thermal protection of the receiver can kick in, and shut it down. That's not as dangerous to the speakers, as clipping, but the extra thermal stress on the receiver may shorten it's life. Plus it's annoying to have it turn off right when you're starting to rock out.


This was my experience with my Onkyo 3007 when I tested it out. Never clipped but finally shut down after 2 hours at 100-105dB.


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Re: yamaha rx-v3900 questions
grunt #316630 07/25/10 08:07 PM
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Both Denon and Onkyo are rolling out their new models so now is actually a good time to get one of this years. The Denon 3807 is solid as is the Onkyo 3007 (which I presently use with my 3 M80s and either 6 QS8s or 4 QS7s and 2 M2s depending on if I’m using the height or wide option).

Like Alan said to get the most out of the M80s in a large room a separate Amp doesn’t hurt but your going to want a good modern receiver anyway so I would get one of those now and if you find you want things louder and still sounding clean you can always add an amp/amps later. A couple forum member are using the Emotiva XPA-3 to run their 3 front speaker while using the receiver to run the surrounds and rears. However, IMO anything in the Denon 3808 or Onkyo 3007 range or higher should be fine driving 2 M80s a VP180 and surrounds/rears in your room at 85-90dB average which over time will cause hearing loss because of how loud it is. wink

As for which is better Denon or Onkyo I thinks it’s a matter of what you want. As I posted previously my experience is that Denons will not shut down before are damaging your speakers where as Onkyos will. Another poster at AVS damaged his M60s using a Denon 2807 for this very reason. More generally I feel that Denon’s features lean more toward the power user or tweaker as the controls are more easily customized. OTOH Onkyo is more geared toward the casual user. They do the same things as the Denons just not always as easy to customize since the Onkyo takes care of more things for you so it’s not always as easy to tweak but easier to run out of the box.

Cheers,
Dean


3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1
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