I only used this pre for a while last year (nothing wrong w/ it, I couldn't afford it); so what follows is worth, around $0,01.
*If your idea of a good pre is a pleasantly rounded, 50 - 16kHz sound, the 30sl is a very bad idea.
*If your future includes Spectral amps, the 30sl is a good idea.
*I don't know how well this pre will mate with yr Krell. Keep in mind that the 30 is a wide-bandwidth design: it is designed to amplify anything from dc - daylight (figuratively speaking). The Krell isn't.
*The highs are deliciously powerful, clear and stable, with a very slight touch of artificiality.
*Being very extended in the high frequencies, you get the impression this is a very "fast" pre. You should also find that the audibility of low frequencies is improved.
*Finally, the pre's high resonant frequency puts any harshness, sibilance, whatever... well beyond audibility -- if you do have sibilance, harshness, etc... it's not the 30SL.
*Ideally, this pre would benefit from a wide-bandwidth / hi-res source which you don't use (apparently ?).
*I used this pre as source driving variably a 10kOhm load Or 10k & 33k (two amps, that is).I teamed it with Symphonic Line Krafts (wide bandwidth as well) & a Genesis bass amp.
Concluding, I enjoyed the sound. It is a seriously good performer. In other words, it doesn't distort as many other pre's do; It doesn't falter when the dynamics are high; and certain difficult sounds (cymbals; brass; etc;) sound OK.
*If your idea of a good pre is a pleasantly rounded, 50 - 16kHz sound, the 30sl is a very bad idea.
*If your future includes Spectral amps, the 30sl is a good idea.
*I don't know how well this pre will mate with yr Krell. Keep in mind that the 30 is a wide-bandwidth design: it is designed to amplify anything from dc - daylight (figuratively speaking). The Krell isn't.
*The highs are deliciously powerful, clear and stable, with a very slight touch of artificiality.
*Being very extended in the high frequencies, you get the impression this is a very "fast" pre. You should also find that the audibility of low frequencies is improved.
*Finally, the pre's high resonant frequency puts any harshness, sibilance, whatever... well beyond audibility -- if you do have sibilance, harshness, etc... it's not the 30SL.
*Ideally, this pre would benefit from a wide-bandwidth / hi-res source which you don't use (apparently ?).
*I used this pre as source driving variably a 10kOhm load Or 10k & 33k (two amps, that is).I teamed it with Symphonic Line Krafts (wide bandwidth as well) & a Genesis bass amp.
Concluding, I enjoyed the sound. It is a seriously good performer. In other words, it doesn't distort as many other pre's do; It doesn't falter when the dynamics are high; and certain difficult sounds (cymbals; brass; etc;) sound OK.