Dunlavy SC-IVa how best driven


I have been driving my B & W 801s with Northcreeks crossovers with Audio Reasearch Classic 150s upgraded with infinicaps. My preamp is an Audio Reseach Ref 2. Does the IVs require more power to sing? Thus far i've been quite pleased with the performance of my system, but after hearing the IVas driven by an x350 combined with a tube front end, I knew I had to upgrade the speakers.
128x128jwin
Try a Classe CA-301/401 or new Bryston 7-B SST (mono's)or 14-B SST with either 801's or SC-1V/A's. Classe amplifiers are true, fully balanced circuit topology. Both amps sound great. Will sound spendid with top-notch tube pre's.
Give em a listen!

peter jasz
I don't think the 4s need a lot of power. I loved mine with a 30 watt Pass Aleph 3 amp. They are really versatile speakers amps wise.
I used ARC Classic 150s with my Duntech Princesses for years (John Dunlavy's design at Duntech that was the precursor of the SC-IV and IVA). Those amps had more than enough power for those speakers, and plenty of strength in the bass in particular. I think that they will work VERY well with the Dunlavys, don't replace them till you hear them with the speakers. My feeling has been that the Dunlavys really benefit from great tubed amplification more than the Duntechs, which had a warmer midrange; by using the Classic 150s you'd also get the benefit of solid state-like control and extension in the bass.
Ive also heard Duntech Princesses driven by the Classic 120,s great sound.
Jwin I ran my Dunlavy SC4a,s with a Pass x-350, But agree they sound much better with my Papworth Audio M200,s(240watt tube monos) Highly recommend tubes with Dunlavys. But I,m a tube man
Steve
You do not need a lot of power with the Dunlavy's - the Classic 150's are more than adequate. The SC-IVA's have a relatively high sensitivity (~91db) and a relatively stable impedance. Thus, they are conducive to the use of tubes. Indeed, after hearing the Dunlavy's with about a dozen different amps, the best amplifier for use with the SC-IVA's was, without a doubt, the BAT monoblocks (120w/ch).