Rotel RB 1092 advise

[yanies]

Hello everybody
I repost my last post with some changes that I found out


I just got 3 days ago the Rotel RB1092 to test it at home that my dealer gave me.


I compare it with RB 1080 and I have to admit that I am a little confused.
The 1092 should have more significant power showing than 1080 but there is not a difference that I expected by jumping from 2x200 to 2x 500
Maybe the whole watts theory works different?
The RB 1092 sounds it has less clarity and sounds less alive than the 1080

( Something that I just found out is that my dealer didnt give me the power cord of the 1092 and told me to use the 1080's power cord )

I also noticed a small drop on highs on 1092
I use Monster cable M1.2
Should I remove the pins from the speaker cables so the cable should be naked? or get smaller gauges?

Anyway I would like to hear your suggestions.
Yanies

[WI Rotel]

Hello everybody
I repost my last post with some changes that I found out


I just got 3 days ago the Rotel RB1092 to test it at home that my dealer gave me.


I compare it with RB 1080 and I have to admit that I am a little confused.
The 1092 should have more significant power showing than 1080 but there is not a difference that I expected by jumping from 2x200 to 2x 500
Maybe the whole watts theory works different?
The RB 1092 sounds it has less clarity and sounds less alive than the 1080

( Something that I just found out is that my dealer didnt give me the power cord of the 1092 and told me to use the 1080's power cord )

I also noticed a small drop on highs on 1092
I use Monster cable M1.2
Should I remove the pins from the speaker cables so the cable should be naked? or get smaller gauges?

Anyway I would like to hear your suggestions.
Yanies

There shouldn't be much difference. The 1080 has more than enough power for just about any speaker in the market. Although you did not post what speakers you are driving, I wouldn't be surprised if your speakers cried "uncle" before your 1080 ever would. Your slight high frequency variation might be subjective, but is not unexpected, despite the glowing reviews around here, all of the new class D amps have significantly worse distortion and compromised frequency response compared to Rotel's (and other) A/B amps. Though the class D amps have great, efficient power, they are still have very measurable and in some instances audible deficiencies compared to A/B amplification. The specs don't lie, the question is how much of it you can actually hear. D amps are not new, what is new is that their switching is now ultra fast thus the new ones have delay distortion characteristics that approach but do not meet (by a factor of 10) the super low distortion characteristics of A/B amplification. Thus unless you have speakers that could benefit from the higher power rating of the 1092 (very few speakers indeed) I see no use in swapping at all. :W

[Nuthed]

Rotel's class D amps don't have anymore distortion than their class AB offerings, despite what was posted above. (Check their website for the truth.)

Frequency response for a class D amp reaches lower, but doesn't go as high. It has all of the audible range covered though.

You probably just don't care for the sound of a class D amp. I don't have much listening time on them, but what I heard wasn't what I am used to. Just not my cup of tea.

[WI Rotel]

Rotel's class D amps don't have anymore distortion than their class AB offerings, despite what was posted above. (Check their website for the truth.)

Frequency response for a class D amp reaches lower, but doesn't go as high. It has all of the audible range covered though.

You probably just don't care for the sound of a class D amp. I don't have much listening time on them, but what I heard wasn't what I am used to. Just not my cup of tea.

Here we go again
Comparison of 1080 VS 1072 (dollar per dollar) per Rotel site

price: 1080: $1000 vs 1072: $1200
Power 1080: 200W vs 1072:100W
THD rated power 1080: .03 vs 1072: .2
1/2 power 1080: .01 vs 1072: .2
1watt 1080: .03 vs 1072: .2
singnal to noise 1080: 116dB vs 1072: 109 dB
Frequency response 1080: 15-100K vs 1072 10-40K
Damping factor 1080: 1000 vs 1072: 200

Conclusion: for less money, a class A/B amplifier vs a class D provides
Twice the power
one tenth the distortion
5 times the damping factor
Twice the bandwidth
and a 7db Lower noise floor
HOWEVER!
The 1082 is heavier AND....... can get warm............. :roll:

Just the facts Jack! :leghumper:

[Kevin D]

Wi, you left out the less then signs on your 1072 specs.

Per the manual, actual ratings:

100 watts, both channels driven, 20khz filter, 8ohm load, 20-20, 0.02%THD

190 watts per channel, 4 ohm load, 0.09% THD.

Regardless, specs don't mean too much to me. I let my ears tell me which is better.

Have you compared a 1072 vs a 1080? You may not prefer the sound of the 1072, but you can't say you hear more distortion or that the wattage wasn't comparable. Different yes, but both accomplish the same goal.

As far as the other specs, dampening factor for both are not in the realm to make a difference. Plus I would prefer 5hz on the low end rather then 60khz on the upper end, if we're talking about frequencies you can't hear anyway (much less having speakers to reproduce them).

I'm all for discussions, but comments like "despite what was posted above." and "Here we go again" push it really close to badgering and an argument. I really don't want to have to lock another thread, much less ANOTHER one started by Yanies that had no reason to be locked. If everyone can't be civil, some will find themselves on vacation for a while.

Kevin D.

[WI Rotel]

Wi, you left out the less then signs on your 1072 specs.

Per the manual, actual ratings:

100 watts, both channels driven, 20khz filter, 8ohm load, 20-20, 0.02%THD

190 watts per channel, 4 ohm load, 0.09% THD.

Regardless, specs don't mean too much to me. I let my ears tell me which is better.

Have you compared a 1072 vs a 1080? You may not prefer the sound of the 1072, but you can't say you hear more distortion or that the wattage wasn't comparable. Different yes, but both accomplish the same goal.

As far as the other specs, dampening factor for both are not in the realm to make a difference. Plus I would prefer 5hz on the low end rather then 60khz on the upper end, if we're talking about frequencies you can't hear anyway (much less having speakers to reproduce them).

I'm all for discussions, but comments like "despite what was posted above." and "Here we go again" push it really close to badgering and an argument. I really don't want to have to lock another thread, much less ANOTHER one started by Yanies that had no reason to be locked. If everyone can't be civil, some will find themselves on vacation for a while.

Kevin D.

Absolutely right,
specs are only a small part of the story, its sound that makes a difference, however, there is this ongoing dilema about class D amps which some people want to get nasty about, just as they want to get nasty about 901's supposed lack of merit. The point I'm trying to convey is that the new class D's are actually quite good and probably sonically indistinguishable from A/B class amplifiers. However, the new much improved, computerized switching devices still do induce phase distortion (albeit small) compared to classic designs. Furthermore, although they have an excellent form function, they are small and do run cool, at this time they are quite expensive for what you get and theoretically (by specs) have less fidelity.
Given these facts, if space and heat dissipation are not big issues for your particular application there really is no compelling reason to abandon A/B designs!
Of note, the amplification provided by BW for their megabuck theater speakers is all rotel Class D, ergo, they must sound pretty good. Obviously, its not Classe Omega's but if all the amps used in that type of install were Omegas you would need another room to put them in :B

[Nuthed]

Here we go again
Comparison of 1080 VS 1072 (dollar per dollar) per Rotel site

price: 1080: $1000 vs 1072: $1200
Power 1080: 200W vs 1072:100W
THD rated power 1080: .03 vs 1072: .2
1/2 power 1080: .01 vs 1072: .2
1watt 1080: .03 vs 1072: .2
singnal to noise 1080: 116dB vs 1072: 109 dB
Frequency response 1080: 15-100K vs 1072 10-40K
Damping factor 1080: 1000 vs 1072: 200

Conclusion: for less money, a class A/B amplifier vs a class D provides
Twice the power
one tenth the distortion
5 times the damping factor
Twice the bandwidth
and a 7db Lower noise floor
HOWEVER!
The 1082 is heavier AND....... can get warm............. :roll:

Just the facts Jack! :leghumper:

A little clarification. The OP was asking about, and I was referring to, the 1092. It has a THD rating of .03%. The same as the the 1080.

[miner]

Went froma RB-1070 to a RB-1092 - won't look back. I was skeptical of ICEpower but I am now a believer. So is a close friend who is a RB-1090 owner.