gerorgehifi.....REALLY !!!!!!! "YOU"BE BACK" ...........Meaning ill be back to the Krell FPB 600??
Replacing my Krell FPB 600 amp with a tube amp
Im thinking of replacing my Krell FPB 600 amp with tube amp . I really love the power and bass slam of the Krell FPB 600.Could i possibly find that with a tube amp? I was thinking of the ARC Ref 250 mono blocks. I am also using an ARC Ref 6 preamp. The only thing i can think of with this much power and bass slam would be the ARC Ref 750se. Any other suggestions and how would the ARC Ref 250s as compared to the Krell FPB 600.
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Meaning ill be back to the Krell FPB 600??And others as good and better. Your 800’s are a pretty nasty load from 200hz down where most current will be needed, 3ohms and up to -55 degrees of - phase angle, this can equate down to around <2ohms in the bass areas as seen by the amp. https://www.stereophile.com/images/archivesart/88B800fig1.jpg Trouble with Bi-amping, the internal xover of the 800's is right in the very sensitive area to the ear middle of the lower mids at 380hz and will be sharing this area with two amps, they better be similar in tonal character otherwise it will sound disjointed, as Almarg has also briefly pointed out. Cheers George |
George.. Thank you for the info. Maybe i would of been better off with this thread in the speaker forum. One thing i know is that i will be keeping these speakers. I will tell you that the Krell FPB 600 cruises with the B&W Matrix 800s. But i was just thinking how a tube amp would sound and be with these speakers. And i never thought of it sounding disjointed bi amping until you and Almarg briefly pointed out. Being all that said maybe id be better off keeping my Krell matched to my 800s. |
Thanks for the nice words, Dentdog. I found that information about the CAT JL2 in the measurements section of this review of the Signature Mk2 version of the amp, in SoundStage. The data provided near the top of the measurements page states "output impedance at 50Hz: 0.7 ohms." And the damping factor measurements shown in Chart 4 indicate a damping factor of about 11.5 across nearly all of the audible spectrum, with a slight decrease to about 11 at 20 Hz and 20 kHz. I’m not sure what output tap or taps the amp provides, but a damping factor of 11.5 corresponds to an output impedance for an 8 ohm tap of 8/11.5 = 0.696 ohms, and less than that for a 4 ohm tap. Best regards, -- Al |
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