Axiom Home Page Forums General Discussion Home Theater Bi Amping M60's

I hooked up my Denon 3805 to the M60's, VP150, QS8's and SVS PB2-ISD. Since there were speakers in the ceiling and the Denon has 7.1, I hooked the ceiling speakers as the rear surround. The ceiling is 12 ft.

I hooked the Denon mic for calibration, and it did not pick up the ceiling speakers. I am assuming the 12 ft. and the fact they are not "good" speakers had something to do with it. Also, the room is medium and the 5.1 sounds great.

I could
1.)Manually set the Denon to 7.1
2.)Set it to 5.1 and take the rears to the M60's for bi amping.

Any suggestions? Since the Denon is pretty good on the power side, would I really notice that much improvement in the bi amping?

You can't use the rear channels to bi-amp the mains. The Denon doesn't work that way.

Also, during the calibration, I believe you need to first tell it that there are rear surrounds connected, then it will detect them.

Thanks. I'm new at a lot of this.

That's the best part! I love(d) finding out and learning all the new/cool things surrounding stereo and HT equipement!

jr

ps Welcome. Most of the people here are nice most of the time.

Is this the same method described in audoholic.com (bi-amping 3805)?
http://www.audioholics.com/productreviews/avhardware/Denon-AVR3805_review04.php

Shut up James!
You smell!
And you're stupid too!
Sheesh.

I went audioholics and it does appear you can bi amp using the rear speakers. Thanks for the link. I'll try it this weekend.

Haha. See!

jr

Well I'll be damned. So it does work! You can't assume anything these days.

Yes Paul, as Peter pointed out, you have to set the 3805 for the left and right back speakers and then they should be detected, regardless of their quality. I'd think that this would be of more advantage to you than the bi-amping technique described in the Audioholics review, which contrary to the statement there certainly doesn't double the power; it merely results in a separate amp driving the woofers and the mid/highs at the same maximum power, which may be of little benefit.

No need to dis someone elses equiment.As it were what do YOU prefer?

I believe he prefers to be a complete ass, judging by the content of his posts.

techpro-

for real man.. what is your deal?? if you just came in here to rag on people and talk down to them, then move on..

we dont need that crap here!!

bigjohn

Yikes...
Techpro?
What are your qualifications to educate anyone?
Certainly not in civility or manners...
And the most idiotic posts I've read here in a long time were most recently posted by you.
Either calm down or take a hike and go post elsewhere...
b.

OT:

Am I the only one who saw "Peter" "Paul" and thought "Where is Mary?"

jr

In reply to:

---

There are some really idiotic posts in here!!!

---

Yeah, like every one of yours, TechPro

Techpro is obviously a disgruntled individual. I'll bet that he has posted here before under another name and been run off. If we ignore him, maybe he'll go away. Or, if Amie sees any of his posts, he'll probably get thrown off the board.

Mark

Wow, I don't know what happened (did not turn the computer on this weekend - just playing with the Denon and Axiom speakers), but I hope it was not my original post.

Anyway, I tried the bi amping and JohnK was right, I could not tell much difference. And thanks pmbuko, I was able to select the ceiling speakers for the rears and could get the 7.1. The axioms do such a great job that I really do not notice the ceiling speakers.

Just a troll... Pay it no mind.

So, getting us back on track for a minute...

What is the verdict? To bi-amp or not?

It seems that the benefits might outweigh the cost (in both terms of extra wire and time/energy).

My impression is that using your rear surrounds as a second room and re-routing sound through the receiver sounds like a lot of work (and might result in varied volume conditions). I could have just read wrong though, but it sounds like a fudged "end around" using the amp in a way that it wasn't really intended to be used.

I will use my rears for 7.1, but will likely not use my second room capability. Should I wire the fronts with the "A" and "B" outputs? Will that get me a bi-amp or a bi-wire?

Any thoughts would be helpful.

The A and B setup on the Denon 3805 is when you have four rear speakers. One set would be for movies (maybe an extra pair of QS8's) and one pair for music (maybe a pair of M22ti's). See page 22 of the owners manual.

If you choose to use Zone 2 without a preamp, my understanding is it uses the rear channel to Zone 2 and you then would only have 5.1.

Adrien, the front A and B terminals on your 750 can't be used for bi-amping(not that it would be of significant value anyway)because there're no extra amps involved. They're merely a parallel connection to the left and right front amps, primarily to allow connecting a second set of speakers(in parallel)to carry the same signals, and usually but not necessarily in a different area. The B terminals can also be used as a somewhat more convenient way of making a bi-wire connection(i.e. instead of having to connect two wires to each A terminal), but bi-wiring has no advantage.

Thanks, John. I had a creeping suspicion that this was the case. Not that it really matters that much. I trust the crossovers in the speakers will handle everything just fine. Just a curiosity.

Sorry for my ignorance, but here is my understanding
how bi -amp works for AVR with separate amps for each channel.

for ex. PE 45 TX is 7.1, but it might be switched to 5.1 and two rear back will be used for 1. A/B or a second zone
If I use A/B and connect surr back to tweeter terminals on the speaker and main fronts to woofer terminals then AVR will supply 100W (tweeter) + 100W (woofers) after filtering by capacitor/coil ( simple crossover) effective power will be reduced to, let say 70W (woofer) + 70W ( tweeter )

the main idea is that by using separate amps we avoid damaging/distorting tweeter/highs when ( if using the same amp ) lows drow most of the power and tweeter distort sound.

So, it is not about power gain, it is about cleaner/safer sound.
And, once again, of course, you will HEAR almost no difference - and that is a good thing if you crank your system's sound all the way up

OK, have a look at this rather interesting (but complicated) article, which deals with biamping (and also explains why it's fairly useless without an external crossover).