Keep what you have and give a subwoofer a shot!
Keep what you have and give a subwoofer a shot!
Intrinsically I like plan A. However Mapman makes a very good point. At least on paper your speaker’s specifications would seem to favor a transistor amplifier. However actually listening to the amp/speaker pairing is the ideal scenario. If at all possible audition the Pharoah or any other amplifier contender. You may find you prefer the tube amplifier with better quality tubes vs the current JJ brand tubes. Generally speaking I find tubes more natural sounding (exceptions do certainly exist ). Some speakers are designed with the intention of using solid state amplifiers.
BTW I have heard and like the Cronus Magnum very much and have considered buying one from time to time, but only for use with the right speakers in teh right situation meaning the speakers are not bottlenecked by the limited drive power of the amp (compared to Pharoah).
Having right amp for speakers is fundamental to best possible sound, much like having a suitable performance engine in your car for optimal performance.
I run various speakers in my home (the better ones from largest, most demanding to least in terms of power needed to max them out):
1) OHM F5 series 3
2) Dynaudio Contour 1.3 mkII
3) OHM 100 series 3
4) OHM L
5) Triangle Titus XL
Cronus Magmum (tube amp) would be my choice for 5 maybe 3 or 4 in a smaller room if not listening very loud. I would not even consider it for 1) or 2) unless in a smaller room and no need to ever go very loud.
Pharoah (hybrid) for 1-2 and most likely 3 though it would do quite well with most anything out there so it is a safer bet if unsure.
The two amps will sound different in most any case though and its certainly possible that either might sound best to someone in any particular case. What sounds "best" is always a very subjective things whereas what performs best (and therefore has the best "chance" overall to also sound best accordingly) is a more objective thing.
As is pretty much always the case it all depends and you never know for sure until you try.
I wouldn't bother with tube rolling the Cronus Magnum. I was in the same boat as you and I purchased over 300.00 worth of preamp and driver tubes. I was happy for a week, then was unhappy again. Although the Cronus Magnum has 100wpc, it doesn't seem to have the drive to power the speakers I was using. I went back to solid state and couldn't be happier. My listening taste is mostly rock, like Pink Floyd, etc and in that sense, the Cronus Magnum was a bit disappointing.
Quite honestly a subwoofer is the wrong direction if you want more bass definition. You need to increase the power at nominally 100Hz +/- 20 Hz for bass impact and definition. A subwoofer is poor at reproducing those frequencies.
If your speakers have bi-wire terminals and your woofer to tweeter crossover is low enough (e.g. 2Khz max.) you might consider adding another amp- e.g. parasound a23, and connect the Cronus sub outputs to the inputs and connect that amp to the woofer terminals.
The CM has relatively low gain so you would need to adjust the gain on the bass amplifier by ear or measurements in order to match the tweeter level.
Ideally you do this in a three-way system where the tube / low power amp drives the midrange and tweeter. However there is no reason it couldn't work in your situation.
The tube amp will not even break a sweat while the solid state amp should deliver all the bass and drive you need.
I have done this successfully and am considering doing the same thing with my CMII.
I am not sure that the problem here falls into tube/ss dilemma, in a strict sense of it. Yes, amp/speaker match etc., of course. Really good tube amp will give you great drive and bass with many speakers. Rogue is an audiophile value company, the expectations should be realistic. At this price level, yeah, I think the OP would prefer hybrid or ss. That's why someone said not to bother with tube rolling. Tube Rogue integrated is not up to the task with these speakers with any tubes. No tubes can compensate for class, class that the Rogue does not have.
Thank you everyone for the responses! I got in touch with a local audio shop which have used Pass INT150, ModWright KWI200 and Primaluna HP integrated. I am planning to bring my Cronus Magnum to the shop to compare with these amps. My problem is not only lack of bottom end, but when listen to rock music or any modern song with mutiple instruments, it lacks of clarity and seperation. I read from somewhere it is typical from tube amplifier, lack of air and not clean like SS.
I just upgraded from Cronus for the same reasons. After playing with various 12au7s,
I got more bass out and gained more staging but lost on clarity, there is always some trade off. For me it just lacked detail with music that is more busy, classical, rock and lacked the lower bass for electronic. So to compensate for detail I would play it louder and that's when it really lacked the oomph and seemed to get congested. I went with bmc cs2. Right away the sheer power and control had me sold. The amp has grip on speakers at all time. Don't see a need for a sub.
Quick update. I took home the Primaluna HP integrated. WOW what a great amp! Perfect match for my speaker! Everything is better than Cronus Magnum! lower power but more powerful bass! I dont need to buy a subwoofer now! mid is richer and fuller. high is clearer. I can enjoy rock songs and hip hops now! It also has more detail than Cronus. It costs $2000 more than Cronus Magnum but to me the level of sound improvement is worth for more! It is 20lb more heavier than the Cronus Magnum. May be that can tell about the quality. It is better than the same price level SS amps which I auditioned lately.
What you’ve just described and experienced is the unquestionable result of a "higher" quality tube power amplifier. The additional 20 pounds and 2000.00 dollars certainly suggest bigger and better output transformers and power supply. I’m not surprised that sonic performance improved across the board. The watts rating can be deceiving, overall power supply quality is more relevant. Were you able to do comparisons to the solid state Pass integrated and Mod wright amplifiers?
Charles1dad, yes I did but not with the same speaker unfortunately. The Primaluna was with Sonus Faber and another shop had the Kef R900 both were excellent. Sonus Faber standout in vocal and accoustic songs but not as good in rock songs compare to Kef or my Ht2-TL. I can live happily with the Kef combo as well. However, they were not auditioned in the same room or settings so it was not fair to compare. I also auditioned a Parasound INT, the ModWright, Pass INT but all with different speakers, B&W. Golden Ear. The SS amps all have tighter bass than the primaluna, but to my ear, primaluna leads on everything else. The sounds is more warm and emotional, and fuller body yet details still retained. Considering my speaker is on the neutral side and not warm, also my music taste is so wide, I decided the Primaluna is more suitable for me. Another pro for Primaluna is it has the option to use KT150 for even tighter bass but the con is it has 8 power tubes so I will need to pay about $800 to change the EL34 to KT150 or $400 to KT120. I decided to stick with EL34 for now. It is already excellent now with the original EL34 and less than 100 hours so it may get better after open-up. Tube rolling will be my next year project. :) Very happy for now!
I forgot to mention. I also auditioned a Krell s550 with a Kef R500 and Kef LS50. It was pretty bad and sounded harsh with the LS50 when I play rock songs, but vocal was ok. With R500 it was sweet sound and extremely clean/quiet, but a little bit lean to my taste. I just prefer fuller sound, feel more emotions in it.