Henryhk, i'm sorry if i gave the impression that i haven't been listening to rock/jazz/blues.....that is what i DO listen to about 80% of the time. my 'classical' comments were more an issue of how this amp/pre allows a non-classical person to 'get' classical since they sound so much more natural.
the dart pre and amps really ROCK! last night i listened till about 2:30 in the morning......i couldn't stop. i listened to Stevie Ray Vaughn's 'Tin Pan Alley' 3 times.....phenominal!!! the experience of that recording last night was trancendant. this is a 'touchstone' recording for me......and to hear it come so alive (that's the only word for it) was an experience i just didn't want to end.
transients are lightning quick, yet completely natural. the bass is deep and impactfull. if the recording has an edge it is there.....but in a natural fully rendered way.
i was running a $200 set of Audioquest cables on the woofer/subs......and i was running the Elrod EPS-2's (which are the entry level Elrods mean't for digital) power cords on the darTZeel amps (i have Elrod Statements for my Tenors but they use 20amp IEC's). my perception was that the amazing bass impact and dynamics i had been getting on the 300 watt Tenor Hybrids were noticably less with the 2 dart amps. the deep bass extention and speed was still there with even better articulation and coherence but without the weight and dynamics.
my friend that brought over the Opus also brought over some Elrod Signature EPS-3's. the change in power cords made a huge difference in the bass impact and dynamaics......bringing the 2 dart amps nearly even to the Tenors with the Elrod Statements. from my recollection of the effect of the Statements on that issue compared to any other power cords i would expect that with the same power cords as the Tenors 2 darts would be very close to the Tenors at impact and dynamics. remember, my room is 29' x 21' x 11' with extensive bass traping built in. most rooms would be easily controlled by 2 darTZeel amps.
with the better power cords combined with the second set of Opus speaker cables the dart 'system' is at simply a mind-boggling level of bass performance....which translates to 'action' in the soundstage and imaging that has to be heard to be believed.
last night i dragged out many old familiar rock, jazz and blues recordings......and they were all reborn to me......with much more substance and life.