Denon Preamp model AVP-A1HDCI Pictures & Info- - Page 35

Do audio amps even produce an EM field? I am having a hard time finding even the most basic information.

Processor and 10 channel amp. Thanks!

The transformer does.

http://en.wikipedia.org/wiki/Transformer

Yes, it is possible...

absolutely.

Currents flowing in wires produce magnetic fields, this is ancient EE history embedded in Maxwell's Equations. A time-varying current (i.e. music) will produce a time-varying magnetic field. The flipside of this is that a wire immersed in a time-varying magnetic field will have an induced current. So, any low-level circuitry in close enough proximity to a high-power amp section risks picking up some of the amp's signal. This is can't be prevented by simple shielding, as magnetic fields blow right through. Space and steel are the best remedies.

Any and all electronic devices will produce a magnetic field that will affect other electronic devices in the vicinity. If it did not there would be no need for shielding.

Well I am hoping that this is the case, I really do not want a separate pre-amp for music. I believe that the balanced stereo inputs, balanced design and pure direct modes show intent for this processor to be a class stereo performer.

Im with you... the second it is in store here I am going to book a day for listening and comparing, no question. I am going to compare the AVP to Classe (HT) and also to a 2ch amp... I will post my experiences here.

But any of you out there have some thoughts? I believe that a couple of you have the AVP, no?

The main point is that the EM field that is produced by the power amp obviously does not affect the other aspects of a receiver and if it did a simple design change would solve that.

I personally believe Denon is the leader in HT no questions about that but when it comes to music, yeah they do sound fantastic but comparing it to a 2 channel amp. Firstly I'd say a 2 ch amp will definetley be the leader in the music department, thats there main job.No video processing involved just pure clean sound.I cannot comment on Classe because it really becomes personal choice and I never heard one before.

I am with you. I have a Krell HTS which I'm debating what to do with. Sound quality is most important to me and I will not compromise on that. Unfortunately the AVP has just started shipping (nothing has arrived in the U.S. yet) so we should start to see reviews in a week or two.

I do hope the Denon sounds as good as its engineered.

The denon will be awesome, are you looking at it mainly for music? if it's 50 50 you can't go wrong!

For some reason the backplate layout looks strikingly familiar to a Korean made processor i owned a while back.

Are these Korean Sherwood/Outlaw clones or made in Japan?

Sorry, what?

Made in Japan and designed by Denon. I'm sure the appearance is a coincidence.

I am 50/50 but I have a bias towards 2 ch sound quality. We'll see what happens, we should start to have some reviews in a week or two.

Chris

I would like to opine on the separates issue since I have both. One is a large system with a Pre/Pro, good 2 channel Pass Labs X350 and a B&K 7 channel amp along with Self powered subs and furniture with transducers. I play from a NAS drive, CD, Satellite, HD-DVD, DVD and Bluray. This system is connected by dedicated filtered electricity and good cables. My second is a 5.1 Receiver with a DVD player a self powered sub and good speakers.

Both systems sound good but of course I'd rather sit in front of the separates system.

I've upgraded over the years nearly every year and with the separates it's more fun because it's only a component. I've tried quite a few amps and had wanted to try your amp but I didn't. This has been a fun hobby for me for the last probably 20 years and my first Pre/Pro was the Yamaha DSP-3000 which I really loved and in fact still own. You also have many different speakers and my two mains need more power and with separate amps you can do more to configure this. I also really like 2-channel music and with a set of big speakers and a powerful 2-channel amp you really get good sound.

On the other hand if you buy all in one it's easier to set up and one might argue that you eliminate interference by having less cabling and fewer AC connections causing ground loops.

I guess my point might be to not be concerned with the interference unless you actually buy separates because I've had more trouble with separates and interference. I also think your issue comes down to what you want to do with the system, budget and etc.

This issue can be more subjective and less scientific and that's probably a good thing because years ago at a time when I owned a McIntosh with tubes it was both scientific and subjective. Now that I'm older I really want to buy both a tube amp and a phonograph, yikes.

If I were you I would do as you mention and move to one unit that has what you need and has balanced outputs to match your amp. My pre/pro works very well with 2 channel audio. My point is that you have a nice amp and lots of power which is good. Just don't connect the amp to the same circuit as your pre/pro. With an amp of your size I might even make sure I used one step heavier in guage for the in house wiring on a dedicated circuit for the amp. You don't want excessive voltage drops in the AC line.

Just my opinion.

John

Yes they do and in part without EM they wouldn't work (most of them).

John

You are right but if you open up some of these you'll find that they can completely shield circuits by using different technologies and one that is similar to a toslink connection. I am not saying your wrong because some interference may actually be allowed and considered acceptable/inaudible but we are talking about companies that are in the higher end of the equipment spectrum and I doubt the interference is or should be an issue.

John

jongig, thanks.

I am heavily leaning towards going with one unit for both HT and 2ch. The main problem is what to choose (sorry all denon lovers, but remember I am one too)... Many of my friends tell me to go with e.g. Meridian, Parasound, Arcam... they have less (e.g. no hdmi) but are said to be much better in sound, especially for 2ch.
So far denon has been a no brainer for me as the price/feature/performance ration has been much much better than anything else.... but the AVP costs about 60000SEK (in the same range as the high end stuff)...

"LISTEN" is the general advice, but good luck finding a dealer that has all amps, and confounding factors like setup will almost certainly kill any comparison. I do have one break, I can listen to classe pre-amp and the denon on the same setup in the same room... this is going to be interesting.

I always wanted a Krell! Are they still in Milford? That is where our first house was!

I have a Meridian proc, and am afraid of getting any less than something like the Denon. I will wait for more reviews...soon I hope.

P.S. I have B&W, all around, as well.

Please let us know, once you've had a good listen.

I'd be very interested in your findings. I too have heard Classe in a setup using the CA-M400s and B&W 800D.

I have great expectations of this processor and power-amp combination plugged into my 802Ds.

Mark

I'm not technically terribly knowledgable and had thought ground loops tended to occur when mixing pro amps with consumer gear. But since this thread isn't a pro amp thread, I assume you mean that it can happen with all-consumer gear, if the components are hooked up to different AC outlets (on different circuit breakers)? Is that the case?

I have yet to build an HT and am wondering if I should arrange (if it is even technically possible) to have the whole shebang on 1 huge circuit breaker. Since I am planning on some high-powered amps (maybe 600-1200 wpc for fronts, 300wpc for sides/rears, plus 2 subs and pj) it would need to be a whole lot of amperes I think).

Power is not just total number of watts though - in the high end realm look for amps that can double their wattage output when halving the ohms. Take a look at the Denon POA-S1 which is a good example - its a truly powerful amp, and is also my dream amplifier. It's about time they released a new version in my opinion.

250w @ 8Ω
500w @ 4Ω
1000w @ 2Ω
1400w @ 1Ω

Actually I did ask DenonJeff (on the thread for DenonJeff) if any high-powered amps were on tap for 2008 and the answer seemed to be no, that they'll see how the 10-ch amp is received and then decide what to do in the amp department.

Even the POA-S1 you mention isn't enough for me, I want at least 500w into 6 ohms for the fronts, and am considering Bryston 7B-SST or possibly pro amps - Crown MacroTech.

Crown I-Tech Series, Network info if you are a gadget conessouir

What are people hearing for ship dates in the US from their dealers? Anyone confirmed one is coming for them as yet based on a pre-order?

No word yet, still patiently waiting. Last info was that it was supposed to be available by the 21st of this month. But that doesn't seem like that's going to happen. So more realistically I'm guessing by the end of next week or following week. I was so looking forward to getting mine this week, but all I can do is wait.


Seth