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Discussion Starter · #1 ·
sorry to post another one of these, but every setup is so unique I need help. I have adcom GFA-5500, polk LS90 main, polk cs400 center, polk rt35 surround


I'm looking to replace my pioneer elite 47tx with something for hdmi and truehd and dts-masterhd or whatever the heck its called. It has to have pre-outs obviously for the adcom. a 2nd hdmi out would be nice for the bedroom. i just dont know. i see sony dn1030, dn1040, denon stuff. will not do onkyo even if given to me.


I am new to having the adcom amp so I'm not sure what power I need to drive center, and surrounds. it will be a 5.1 setup. should i consider getting a seperate for the center and get weaker receiver just to run surrounds?
 

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Discussion Starter · #2 ·
I'm mostly concerned with watts per channel. how much would be sufficient to power center and 2 surrounds and not get overwhelmed by ls90s running 200 watts per channel.
 

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Why use the ADCOM amp at all as those speakers are fairly efficient with most any AVR being able to drive them near reference volume levels in a small/med sized room (at least)? However, with the ADCOM taking the load off the AVR, and the CS400 being fairly efficient and surrounds generally not requiring much power at all, any model you select with at least 2.1 pre-outs would suffice. Budget? The Marantz 6008 and Denon X4000 both offer a full set of main zone pre-outs with at least a second HDMI out (X4000 actually has 3); however, if you drop the ADCOM you can drop down to the Denon X3000 for a Zone 2 HDMI Out.
 

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Quote:
sorry to post another one of these, but every setup is so unique I need help. I have adcom GFA-5500, polk LS90 main, polk cs400 center, polk rt35 surround


I'm looking to replace my pioneer elite 47tx with something for hdmi and truehd and dts-masterhd or whatever the heck its called. It has to have pre-outs obviously for the adcom. a 2nd hdmi out would be nice for the bedroom. i just dont know. i see sony dn1030, dn1040, denon stuff. will not do onkyo even if given to me.


I am new to having the adcom amp so I'm not sure what power I need to drive center, and surrounds. it will be a 5.1 setup. should i consider getting a seperate for the center and get weaker receiver just to run surrounds?

since the system is 5.1, there are virtually no benefits to be had when your speakers are crossed with a subwoofer unless they dip down to 4 ohms rms load and are cranked really high.


Unless your avr doesn't thermally trip or distort at your max reference volume, there are no benefits to adding external amp.
 

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Discussion Starter · #5 ·
so you guys are saying I don't need the adcom amp? I haven't bought it yet. I was going to tonight for $350. I'm new to this but from what I've read adding a separate for the mains makes all the difference in the world. with the extra 350 I could probably spend up to 800 on an AVR.


I read some things. Let me know if its true. the x4000 says 125 watts per channel into 8 ohms (20-20,000 Hz) at 0.08% THD, with 2 channels driven. so its 250 watt in stereo mode. in surround mode its diving that 250 into 5 channels essentially making it 50 watts per channel. 50 watts for the LS90 would not be enough power, right?
 

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Discussion Starter · #7 ·
So I am wrong then
thanks for the info. two more questions. the sony dn 1040 and the denon avr-2113ci both show zone 2 power outs. can those be used to connect to an amp and power the fronts taking the load off the sony or denon, or is that only for 2 channel stereo independent source? and my next question would be, should i get the x3000 like jdsmoothie said or should i get the dn1040 or denon 2312ci and connect the adcom-5500 to the preouts to power the mains. which option sounds better?

http://www.amazon.com/Denon-AVR2312CI-Integrated-Surround-Receiver/dp/B004Z0S7JW/ref=sr_1_4?s=electronics&ie=UTF8&qid=1380391845&sr=1-4&keywords=denon+3312

http://www.amazon.com/Denon-AVR-X3000--command-7-2-Channel-Networking/dp/B00CALM12W/ref=sr_1_1?s=electronics&ie=UTF8&qid=1380391949&sr=1-1&keywords=x3000

http://www.amazon.com/Sony-STR-DN1040-Channel-1155-Watt-Receiver/dp/B00CAAJDP6/ref=sr_1_1?s=electronics&ie=UTF8&qid=1380392100&sr=1-1&keywords=dn1040
 

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There's nothing wrong with adding a separate amp, you just don't need to. Some people do think an amp can add to the sound quality vs a receivers power supply but most think it's not noticable. With your speakers I would just buy the best receiver I could affor and leave it at that.


The 2312 is a two year old model while the X3000 is this years. If you need the latest whizz-bang features then get the 3000.


Also look at factory refurbished models from ac4l.com. They come with a one year warranty and 3 or 5 year third party warranties are very reasonable.

http://www.accessories4less.com/make-a-store/category/AVReceiver/Home-Audio/Home-Theater-Receivers/1.html?brand=Denon


Sony receivers aren't recommended on these forums very often.


Using the receiver to bi-amp your front speakers doesn't really accomplish anything as both (all) channels would be run off the same power supply anyway.
 

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Discussion Starter · #9 ·
I'm about to pull the trigger on the denon 3313ci. thanks for all the help. kinda confused why it only says 799.99 retail when 3312ci says 1099.99 retail. this is ac4l
 
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