Which 2 channel Rotel AMP??

[Ludwig Van Beethoven]

Hi GUys,

I am looking at 2 models of the Rotel 2 channel amps and trying to decide which on to get, either the RB-991 or the RB-1080.

RB-991 =

Total Harmonic Distortion (20-20,000 Hz, 8 ohms): - less than 0.03 percent
Continuous Power Output (20-20,000 Hz, 8 ohms): - 200 watts per channel
Signal to Noise Ration (IHF A network): - 116 dB
Frequency Response (+0.5 dB, -3 dB): - 15 Hz to 100,000 Hz

RB-1080 =

Watts/Channel all channels driven, unbridged, 8 ohm load, 20 to 20k Hz, 0.03% THD 2x200 watts

Frequency Response 15Hz-100kHz +0.5dB, -3dB

[Andrew Pratt]

I think people generally prefer the 991 if given the choice

[Azeke]

Ludwig,

I am not sure of the sonic qualities of the two, Andrew would know. I believe the minor differences are the 1080 has a 12 volt trigger and is available in silver, the 991 lacks these options.

Hope this helps,

Azeke

[aud19]

I see you've chosen the two-channel route rather than the multi-channel (DVD-A, SACD) route. I take it you don't plan to bi-amp your speakers using the 1055's amps? If you do I would suggest using the 1070 for the bass in your mains and the 1055 for the highs, especially considering the efficiency of the horns in your klipsh's. Going that route would save you some $, compared to the 1080, to spend on say.... some nice new recordings! As for the 991 vs. the 1080... I would think Azeke's right. The differences would be mostly cosmetics and features. Do you care if the amp matches your 1055 or if it has a 12v trigger?

J.R.




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[Ludwig Van Beethoven]

How would I Bi-amp my speakers with the 1070? I only want the one with the best sound characteristics

[Andrew Pratt]

Given that your speakers are so sensetive I wouldn't bother with bi amping...its not like those speakers are screaming for power. If you did bi amp though you'd simply need to run a set of speaker cables from the 1055's front left and right speaker outs to the top two binding posts on the back of your speakers and then run another set of speaker cables from the 1070 amp to the bottom binding posts. Make sure you remove the metal plate that connects the upper and lower binding posts on the speakers first though

[aud19]

I only suggested bi-amping as he's already got the 1055 and the amps it includes. Also as you stated his speakers aren't power hogs so the 1055 would EASILY power the horns and the less expensive 1070 could then handle the bass. Plus I believe he already stated he has them hooked up with bi-wire anyway which would really require very little change.

J.R.




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[Ludwig Van Beethoven]

Yes my speakers are already biwired with Monster Z2 biwire cable with gold connectors. So then i will do the 1055 and 1070 or 991 amp and just do a amp biwire. Highs and mids to the 1055 and the lows to the amp. So i would need to ditch my current monster biwire cabling?

[aud19]

Nope that's the beauty of this set up for you. You've already got all the cables. Bi-amping works the same way as bi-wiring except you actually have a seperate amp to power the lows and highs rather than splitting one output.

J.R.




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[art vandeleigh]

no, i think he would need to get rid of the bi-wire monster cables, because those cables 2 +/- going to 4 +/- . if you bi-amp then you would need 4 +/- to 4 +/-......am i assuming correctly?

[aud19]

I'm not sure what you were trying to figure out there but bi-wiring and bi-amping use the exact same amount of wiring. The only difference is that the second line is attached to another amplified channel in bi-amping rather than splitting one channel for bi-wiring.

J.R.




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[maddog]

I think that Art is right. The don't think the Monster Z2 biwire are shotgun with 4 sets of connectors on both ends. I am pretty sure they are internally biwired with 4 sets of connectors at the speaker end and only 2 sets of connectors at the amp end. To bi-amp, you should use two physically different cables of the same length like Andrew describes above.

[art vandeleigh]

sorry, maddog understands what i mean...i am talking about the number of connectors. i think the monster is internally bi-wired with 2 connections to 4. so if he wanted to bi-amp, then he would need to get 4 to 4 connections. again, this is assuming that the monsters wires he is using is 2 to 4 connection. which i think it is.

[aud19]

Aaaah well that would suck if it's done internally....

Let's hope for his sake it's not.

J.R.




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