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Urgent help!!! Please help me decide Krell solo 575 vs Classe Omega
- Thread starter Ashl777
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Svend P
Addicted to Fun and Learning
Nothing. If your current amp is not audibly distorting, nothing will give a better performance. Adding subwoofers, room-correction or acoustic treatment of the listening room is the only thing that would give an improvement.
OP
Ashl777
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- #23
Thx wanting to add subwoofer. Have always felt it lifts the perceived mids for some reason. Havent measured that. Just subjectively. Thinking of trying something from jtr speakers and not the ultra expensive boutique brands.
Svend P
Addicted to Fun and Learning
You can even see the recessed midrange that MAB talked about in the measurements of the B&W 800 speakers (courtesy of Stereophile).
Since you have had them for many years, I guess you have an emotional attachment to them. But for a better sound, I would rather have a set of Kef R3s or Genelecs together with a pair of subwoofers.
Since you have had them for many years, I guess you have an emotional attachment to them. But for a better sound, I would rather have a set of Kef R3s or Genelecs together with a pair of subwoofers.
I think the rise of class D is gradually undermining the second-hand value of other amplifier types so if you're genuinely concerned about resale value, I'd steer clear of buying an expensive class A.Heat is definitely something i realize will be issue going class a. Is going into a 170sqm around 765 cubic meters space and air conditioned. Was wondering looking only at measurements what would be better amp? For the 800 matrix. Both double and triple down in ohm load if the socket will provide. Re -sale the omegas will hold better value under our audio-fools me thinks
From the measurements I would expect there to be zero sonic benefit in moving from the Krells to the Classe.
Much better ways of spending the money as noted above. Regardless of what speakers you have there is always something better. Room acoustics can usually be improved too.
This is an amazing image. Was exactly what I was looking for while trying to EQ the RP-600M II's I am currently demoing. I saved this for future reference.
MAB
Major Contributor
This is what the audio industry does, makes people think they have an urgent issue that needs solving, and also makes them believe the solution to the alleged problem requires lots of money.
Is that really a $150,000 turntable?
So what car do you drive? LOL
Measurements I made of my Krell FPB 350 mcx (monoblocks), at about 5 watts (the highest I could use for measurements) into MartinLogan request speakers, using a DAC2 HGC to create the analog, and also passing through a Krell KCT preamp, measured at the amp output terminals, with non-laboratory grade goddies with which to measure - think jumper clips to an XLR, etc, along with the regular rat's nest of cabling behind the rack.
www.audiosciencereview.com
Krell FPB 350 mcx
A quickee look and see... Bought 9 years ago used, no rebuild, no repairs, no faults. Serial number indicates 2005 build date. Left monoblock, approximately 5W/4Ohm tone, loaded by the speakers: Not great... Left Channel. 695 more rated watts available, though. Let's see: THD 0.012%...
www.audiosciencereview.com
OP
Ashl777
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thinking of letting the boulder 812 go and get a trinnov amethyst to help with room and speaker correction.The big brother altitude did wonders in my other problematic setup. Are the dacs/ room correction units from other manufacturers that play in the same league at better value proposition? I have heard of lyndorf(not sure spelling).
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Ashl777
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maybe your measurement off. can't think Sonos amp can outperform a fpb350. I'm a newbie but also can't believe that signal to noise ratio rates an amp. connect that Sonos amp to a demanding speaker like my xrt2k and will be muddled. connect the fpb350 and will do at least ok job. throw 2000w rms at it and it shines.Measurements I made of my Krell FPB 350 mcx (monoblocks), at about 5 watts (the highest I could use for measurements) into MartinLogan request speakers, using a DAC2 HGC to create the analog, and also passing through a Krell KCT preamp, measured at the amp output terminals, with non-laboratory grade goddies with which to measure - think jumper clips to an XLR, etc, along with the regular rat's nest of cabling behind the rack.
Krell FPB 350 mcx
A quickee look and see... Bought 9 years ago used, no rebuild, no repairs, no faults. Serial number indicates 2005 build date. Left monoblock, approximately 5W/4Ohm tone, loaded by the speakers: Not great... Left Channel. 695 more rated watts available, though. Let's see: THD 0.012%...
OP
Ashl777
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- Thread Starter
- #36
Hi please can some of the members with experience offer their opinion on the measurements between the two. I will be pairing like stated with bowers wilkins 800 matrix.
www.stereophile.com
www.stereophile.com
Used with these speakers
www.stereophile.com
Classé Omega monoblock power amplifier Measurements | Stereophile.com
Sidebar 3: Measurements Following the usual IEC preconditioning of running an amplifier at one-third power into 8 ohms for an hour, the Classé Omega's chassis was hot. However, other than the side-mounted heatsink, which was above 60 degrees C, it was not too hot to keep my hand on. An...
Krell Solo 575 monoblock power amplifier Measurements | Stereophile.com
Sidebar 3: Measurements I performed a full set of measurements on the Krell Solo 575 (serial no. 30315060125) using my Audio Precision SYS2722 system (see www.ap.com and the January 2008 "As We See It"). Before measuring it, I preconditioned the amplifier by running it at one-third the specified...
Used with these speakers
B&W Matrix 800 loudspeaker Measurements | Stereophile.com
Sidebar 2: Measurements Normally, I ask reviewers to ship the products to Santa Fe for measurement once their listening sessions are over. In the case of B&W's immense 800, however, the Mountain—in the shape of Robert Harley, Stereophile's computerized test gear, and myself—decided it would be...
OP
Ashl777
Member
- Joined
- May 15, 2025
- Messages
- 40
- Likes
- 11
- Thread Starter
- #37
Hi please can some of the members with experience offer their opinion on the measurements between the two. I will be pairing like stated with bowers wilkins 800 matrix.
www.stereophile.com
www.stereophile.com
Used with these speakers
www.stereophile.com
Classé Omega monoblock power amplifier Measurements | Stereophile.com
Sidebar 3: Measurements Following the usual IEC preconditioning of running an amplifier at one-third power into 8 ohms for an hour, the Classé Omega's chassis was hot. However, other than the side-mounted heatsink, which was above 60 degrees C, it was not too hot to keep my hand on. An...
Krell Solo 575 monoblock power amplifier Measurements | Stereophile.com
Sidebar 3: Measurements I performed a full set of measurements on the Krell Solo 575 (serial no. 30315060125) using my Audio Precision SYS2722 system (see www.ap.com and the January 2008 "As We See It"). Before measuring it, I preconditioned the amplifier by running it at one-third the specified...
Used with these speakers
B&W Matrix 800 loudspeaker Measurements | Stereophile.com
Sidebar 2: Measurements Normally, I ask reviewers to ship the products to Santa Fe for measurement once their listening sessions are over. In the case of B&W's immense 800, however, the Mountain—in the shape of Robert Harley, Stereophile's computerized test gear, and myself—decided it would be...
Honestly I think the question has been answered already.Hi please can some of the members with experience offer their opinion on the measurements between the two. I will be pairing like stated with bowers wilkins 800 matrix.
Classé Omega monoblock power amplifier Measurements | Stereophile.com
Sidebar 3: Measurements Following the usual IEC preconditioning of running an amplifier at one-third power into 8 ohms for an hour, the Classé Omega's chassis was hot. However, other than the side-mounted heatsink, which was above 60 degrees C, it was not too hot to keep my hand on. An...
Krell Solo 575 monoblock power amplifier Measurements | Stereophile.com
Sidebar 3: Measurements I performed a full set of measurements on the Krell Solo 575 (serial no. 30315060125) using my Audio Precision SYS2722 system (see www.ap.com and the January 2008 "As We See It"). Before measuring it, I preconditioned the amplifier by running it at one-third the specified...
Used with these speakers
B&W Matrix 800 loudspeaker Measurements | Stereophile.com
Sidebar 2: Measurements Normally, I ask reviewers to ship the products to Santa Fe for measurement once their listening sessions are over. In the case of B&W's immense 800, however, the Mountain—in the shape of Robert Harley, Stereophile's computerized test gear, and myself—decided it would be...
To repeat, both amp choices offer enough power with low enough distortion and will be driving speakers that are a pretty easy load. They will sound exactly the same
Hi - I'll chime in. As I understand it, you would like someone to model out the expected response and choose one over the other using palpable (objective) criteria as to which is "better". Extrapolating from the data we have, the response to your question is: the two amps will sound very much the same.Hi please can some of the members with experience offer their opinion on the measurements between the two. I will be pairing like stated with bowers wilkins 800 matrix.
Classé Omega monoblock power amplifier Measurements | Stereophile.com
Sidebar 3: Measurements Following the usual IEC preconditioning of running an amplifier at one-third power into 8 ohms for an hour, the Classé Omega's chassis was hot. However, other than the side-mounted heatsink, which was above 60 degrees C, it was not too hot to keep my hand on. An...
Krell Solo 575 monoblock power amplifier Measurements | Stereophile.com
Sidebar 3: Measurements I performed a full set of measurements on the Krell Solo 575 (serial no. 30315060125) using my Audio Precision SYS2722 system (see www.ap.com and the January 2008 "As We See It"). Before measuring it, I preconditioned the amplifier by running it at one-third the specified...
Used with these speakers
B&W Matrix 800 loudspeaker Measurements | Stereophile.com
Sidebar 2: Measurements Normally, I ask reviewers to ship the products to Santa Fe for measurement once their listening sessions are over. In the case of B&W's immense 800, however, the Mountain—in the shape of Robert Harley, Stereophile's computerized test gear, and myself—decided it would be...
So, I join everyone else in recommending you stick with the Krell and think of getting multiple subs (a company called audio kinesis sells a set of 4 along with their amplifier).
Otherwise, the only other possible response is a subjective one -- and you are really the best qualified person to do that... Unfortunately, it's difficult to carry out real life demos...
Here is one experiential story involving Krell & Classe -- take it with more than one grain of salt: back in the day, I had a Krell 50 & someone lent me a Classe Omega (class A) for a couple of weeks to try out. I was powering Apogee Caliper speakers. I invariably preferred listening to the Krell than to the Omega; of course, it may have been a matter of my liking Krell's blue-ish colour better than the cold silvery Omega -- but I remember describing the Omega sound as "dry" (i.e. recessed low mids) & "brittle"... If you look at the chart on the previous page, it correlates perception with frequency response anomalies, to give you an idea of what the descriptive words could mean in real terms. Good luck!
