Buckle up folks, this is a long report.
Last Sunday afternoon I drove approx 20 kms north from my place in Salt Lake, Kolkata to audition Pratim's new amp. I was not 100% because the previous night we were up till about 2:30 AM after the World cup victory. I was a bit worried also about some delays on the road because of election campaign meetings or processions. However, my fears basically vanished as soon as I hit the road, because even the political party workers took it rather easy after all the involvement the previous night. There were not many on the road. People were mostly sleeping, I guess. So was Pratim, when I called him from a distance
of 10 minutes drive from his place to let him know I was almost there.
The amp is sizeable and heavy. Pratim would know the exact dimensions. But nothing unusual for an amp of its class. I suppose Pratim just powered it on immediately after I called from the road.
From my listening experience that day, this amp needs at least a solid hour or two (two is better) to properly warm up. I stayed till 7 PM, and the amp was performing much better for the last hour or so.
Initially, just after Pratim got the amp, he had a lot of doubts. Doubts about the pre-amp, if it was enough to produce the required volume levels, the desired dynamics, and if he would be able to run a TT setup through it. Initially the sound, according to Pratim, was not impressive, not dynamic with certain kinds of music, and had a bit of bass-boom. We had long discussions over the phone from changing the pre-amp to active, changing the amp to something else, and even changing his speakers. I basically asked him to keep his calm, be patient and wait for at least 100 hours to have an initial impression. Based on what I have read about the Kismet amp on the 6moons review, it at least deserved some more time. I understood from that review that while his previous amp, the Jaton Operetta, was a very good amp for its price point, the Kismet should actually belong to an absolutely different category. The option of changing the passive pre to an active (and changing the speakers) are always there. We even discussed the Leben RS-100 pre for a while (as all of you know I have immense faith in Leben products and this one has impeccable reports). But the basic message from me always was one of wait, watch and proceed. I believe one should not change too many things at one point of time, then you loose count of the actual contribution of a particular component and end up not learning anything from the exercise. All my life I had to do with a very limited amount of money, and I want to make the most of it by carefully changing one thing at a time to optimize the sonics.
After I arrived, Pratim put some female vocals on. Immediately I realized there was a problem, with sonics being a little muddy and a bit of a bass boom that Pratim was complaining about previously. His speakers were about 6.5 feet apart, and toed in appreciably so that the on-axis straight lines from the speakers met well in front of the listening position which was more than 10 feet (perhaps even 12 feet) away from plane of the systems. In addition, because of the appreciable toe-in, the back of the speakers were facing sidewalls less than 1 foot away. Pratim and I then set about to correct the speaker positioning. After a bit of experimenting, the final position we settled for had the speakers with much less toe-in angles so that they had now free space on the back of the speakers (look at the pictures put up by Pratim) and the on-axis lines from the speakers met a little bit behind the listening position where Pratim has put a very comfortable sofa. Two things were achieved with the new speaker positioning: 1) muddiness and the bass boom of the sound were gone, 2) the sweet spot had far more tolerance, that is, one had a good sense of imaging and soundstage from a wider region around the dead-center sweet spot, with better overall sonics.
I deliberately let Pratim play his music initially, as the amp was gradually warming up and left my CDs (which I know very well) for more critical listening after the amp was reasonably warmed up. About an hour or so after my arrival, I put on the first CD I brought: A meeting by the River, Ry Cooder and Vishwa Mohan Bhatt, Water Lily Acoustics. This CD has very low recording level, and one of the things I wanted to check how Partim's setup with the passive pre fairs with such low recording level. At about 4 O'clock position of the volume knob of his passive pre, the sound was fairly loud. We increased it till the max (6 O'clock position) and the sound volume was nearly ear-splitting level. I just want to mention here that with the passive pre, the max volume position corresponds to zero gain from the pre, at any other position, it is actually attenuation (rather than gain in case of active pre).
The guitars sounded nearly magical (especially Bhatt's). However, I was not that satisfied with the sonics of the tabla (more on this later). The imaging was very good and the soundstage was always 3D and huge with the appropriate recordings.
I continued with 2 Chhandadhara CDs (a 2 CD album by Ravishankar, recorded in London to mark his 70 years of performance, and another CD by Ali Akbar Khan recorded in Stuttgart). Lower strings on the sitar lacked a bit of sweetness (more on it later), however, everything else was very very good including the percussion on the pakhawaj. Next, Ali Akbar's sarod was truly truly magical, the best I think I heard it sound in recent times (the sweetness, the tunefulness, yet the fullness and the impact and decay of the typical Ali Akbar sarod I have heard at least 20 times without amplification), but again Swapan Choudhury's tabla while sounding very good was not phenomenal (more on it later).
At the end I put on the tricky CD by Jasraj (again recorded in Stuttgart, the same one I used in my auditions in my long amp thread). Initially the level is extremely low, and Jasraj supported vocally by Shweta Jhaveri on his right and Durga Jasraj on his left, two tanpuras on two sides and slightly back, and a sarengi on his left and tabla on his extreme right : quite an ensemble. I looked for separation of each, tonal qualities and subtle microdynamic elements without which the initial movements of the alaap would be lost. It was all there. Later when tabla started accompanying, again it was okay, but not very special.
Overall, the experience was very very enjoyable. The sound was extremely dynamic and full with an incredible amount of detail and microdynamics. All these qualities were way above his previous amp. The thump and impact was there (as evident on the track no. 3 of the Cooder-Bhatt CD). Imaging and 3D soundstaging were also very impressive (just one observation here, the performers seemed like positioned a bit down, almost as if one was looking a bit down on the performers from the listening position. It improved a bit after the speakers' repositioning, but still was there and I did not quite understand it).
However, my comments above 'more on it later' within parentheses need further explanation. If you read carefully, my dissatisfactions were with the lower mids or perhaps upper and mid bass parts. These improved quite a lot during the course of my 2 and 1/2 hour audition, but still I would expect much better from an amp which has been compared with superlative amps. My guess is that (and reports confirm this, perhaps sridhar and other experts can comment here)) this amp needs serious burn in (I'd suspect something like 500 hours, Pratim says he has already seen vast improvements over the past 100-150 hours of listening. Remember, he was initially unhappy with the sonics). In addition, this amp also needs a couple of hours of warm up time before it can sound at its best. I know this is a bit strange for SS amps, and again I invite comments by experienced blokes on this, but I have read many reports on very long burn in and warm-up times even for the Odyssey Stratos in the Odyssey threads in audiocircle.
The upper mids and the highs were superb (perhaps they would improve even further with more burn in), and this is why Bhatt's guitar sounded better than Cooder's because the 'bottleneck' guitar (whatever it is) played by Cooder had more lower frequency elements than Bhatt's.
In any case, I already would rate this amp very highly, ahead of most SS amps I have heard in the past few years. I'd reserve the final judgemnent after another listen after a reasonably longer burn in, and perhaps if Pratim is willing to lug his amp over (I know it's heavy, but we have an elevator in our building, and my son can help), I'd love to hear it through my speakers once.
Finally, the passive pre that Pratim is using is fine in regard to producing enough volume levels and dynamics. I even listened to his TT (RPM 4) with MM Cartridge coupled to my very budget CA 640P phono pre which then goes into his passive pre. I did think initially that the TT would not work especially with a low output cartridge in his setup with the passive pre. But it does work in his set-up). The TT experience was quite decent with most of the attributes of the analogue source present. The 640P is no match for the Nighthawk that he borrowed from Vasu and is currently intending to buy. Firstly I'd expect much lower rumble with the Nighthawk when it comes to playing older records. Sonically also the Nighthawk should be a lot better (how much, I'd leave that to Pratim to comment, I did not hear the Nighthawk, because it was already returned to Vasu. I use the 640P, because there's nothing better IMO at that very-budget-price-point, suits me fine with a 21 year old Dual TT that breaks down every once in a while. If I plan to invest in a new TT, I'd think better, at least in terms of a Clearaudio Nano Phono or something like that).
Regards.