My post was somehow erased. I'll try again. the dunlavys are designed for high current solid state amps with gobs and gobs of power. Their impedance is from 2.5 ohms to 5 ohms across the entire frequency spectrum. check out the stereophile review, from 1998. see the impedance chart. https://www.stereophile.com/content/dunlavy-audio-labs-sc-iva-loudspeaker-measurementsThe citations are great with the klipsch, an ideal pairing, they would be. Not even close to the required current and power that the dunlavy's need to come alive. |
Thanks for the info. I have a pass labs x250 in another room that power my infinity RS 4.5's. I need to move this amp over and see what the results are.
What is the ideal amp in the used market for the Dunlavy's?? |
It's a matter of low-efficiency versus high-efficiency speakers! I prefer the second type! Vintage Altec's, JBL's, Klipsch ... Easy to drive with low-power tube or SS amps! Your SCIV's would sound far better with a high-power SS amp, like my Perreaux 2150B (200wpc/8ohms, 400wpc/4ohms - clipping at 300+ and 500+ watts respectively). I suspect that the SCIV's drop down to 3 ohms or less at mid-bass frequencies. This is a punishing load for any amp, including strapped Citation II's. I bought the Perreaux to use with my restored DQ10's - a speaker that really benefits from a powerful amp! While my Klipsch Heresy's are happy with my SET 2A3 amp (3.5 watts). Horses for courses, as the English would say! |
Your Pass amp should do the trick! How about Jim Bongiorno's last masterpiece: the Ampzilla 2000? |
I would be curious what amp others have found to mate well with the Dunlavy SCIVA'S? I am not a krell fan at all. I don't know how to describe it other than I like a mellow amp. Krells for me are in your face... |
Funny you mention the ampzilla... I have two Sumo 9 s that needs work. I bought them years back because that amp has a following and I wanted to see what the class A amp sounded like with my lascalas. I also have to two classe DR8s that need some work that I might have to dig out and get working. I know I have collected a lot of stuff over the years. You will laugh I also have a crown studio reference amp I used to drive Subs that will drive anything... You can weld with that crown amp...
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I have two of the original Son of Ampzilla's. From GAS - not a Bongiorno design. Andy Hefley did these, along with the Thoebe preamp (have one of those also). Along with a Sumo Andromeda and preamp. All good stuff! |
Even when properly powering the Dunlavy you are not going to get a dazzling sound . They are dead flat which will sound dead compared to other speakers that are not flat in response . |
@robmag - The Dunlavy's where part of the best system I've ever heard (at a dealer around 1996). System was: Dunlavy SC-IV a, Audio research LS-2 pre, ARC VT-130 tube amp, CEC disk spinner and Theta DS Pre/Pro DAC. Wire was all Dunlavy. Cleanest, clearest, most image-correct sound I've ever heard (playing Sade's "Stronger Than Pride"). Truly the definition of "Holographic". Good luck with yours... |
That is very interesting that the ARC performed so well with it... I would have thought my citation II's bridged would have performed closely. I guess I need to do some swapping around to see. |
@roberjerman..................................
the original GAS Son of Ampzilla was most certainly designed by the late James Borgiorno. I met him at Natural Sound when the amp first came out, spoke with him extensively, and bought the demo unit he was showing. What a nice man, so gracious and humble. |
rob, the first obvious question - how long have you owned the DALs? Have they sounded this way from the beginning? Were they better originally but now sound worse?
Dunlavy designs are not to everyone's taste, what is? But they were all (Duntech and DAL) well respected and many found them to be among the most musically accurate and satisfying out of everything available. I suspect there may be a problem with yours.
I owned the Duntech Princess model for 19 years. That was the older sibling to the DAL SC-IV and IVa. From what I've read the DAL versions have slightly less critical power requirements. Initially I drove mine with VTL 300 mono amps, but later went to Parasound JC-1s. The latter was the best overall match I found. They were anything but drab and lifeless. |
I owned a pair of Dunlavy SCIVa's many years ago, and found them to be quite sensitive to the amps driving them. After trying them with at least a half dozen amps, I found the best combination by far to be with CAT JL-1s (although other high powered tube amps generally worked well). |
I know Loudspeakers , verywelland themost neglected parts
are the Xover network. The parts quality is like a stock engine in a car or aFormula 1. The majority of manufacturers use average
parts at best. And capacitors wear out and will make the speakersound lifeless. I lookfor value as well as Quality when rebuilding a speaker worth doing. For example a speaker with
quality build ,and drivers will compete with Loudspeakers several times their cost if you rebuild ,properly the Xover with quality parts
and rewire it. There are a lot of factors. Value for inductors
Jantzen Waxed Copper foil can compete with the best of them
for much less $$ fortop end, and midrange Bass a solid Open coil,
Resistors only 1% non inductive. I have seen cement junk white resistors in $10k speakers Why ? Capacitors the cook book
that what I call the professor TonyGee Who helped me several times while living in Europe. His Humble homemade Hifi capacitor
test . Tony has tested and rated the vast majority of Capacitors
pin the market from basic ok which Many companies use like Solen .personally I would not even use them in the Bass unless
bypassed. I wrote to Marten Logan after owning their products
in the past on how for just $400 dramatically improved their newline over $10k with better midrange capacitors. And if you go to their webpage it shows their $80,000 flag ship ,using
inexpensive midlinewhite Mundorf EVO series ,
when in fact in a speaker this expensive it should have at least
Mundorfs top offering . Vh Copper Teflon ,as well as Duelund Silver foil in oiled wax paper caps best caps for bypass caps I have used .Jupiter Copperfoil another great capacitor .
i have all 3 in my speakers as well as best Bypass caps for quality value which I have on every capacitor the Cornell Dubilier .01uf
3,000v caps . The Reason Tony Gee recommends these is the high voltage rating thicker windings and copper in part of end caps
less resistance better clarity. Bypass caps are not justgood for the top end .these caps are a perfect case and point .The new upper Clarity line CSA ,CSA great value Bypass them and then a Duelund Silver foil Great results just for a example,Jupitercaps are a bit richer everything is about what spice or flavor are you looking for . Your electronics will get exposed if not up to the task .
have at least quality system cables ,and power cords ,and power isolation also.
Dulunds cast best caps or one of in the World. I don’t own any
you need the room ,Huge ,and very expensive ,build an external Xover ,or very isolated for best audible results. I do a lot of what many would call exotic.just to prove a point I bought the new Monitor Audio Studio Stand mount with matching stands for under $2k . Why Their drivers are a version taken from the midrange of their $25k flagship lots of potential .I put $1400 into parts just in the Xover and wiring . With their W-12 subwoofer .it can hang
with many speakers over $10k. With excellent prat and resolution .
theirs your answer do your homework and look to a friend or professional it’s what you can’t see that truly counts. |
To the OP. You mention you have a Crown Studio Reference. I would connect that amp to the speakers. It is also my opinion that the felt material used on the front baffles, to eliminate diffraction, sucks up some of the sound escaping into the room. Many manufacturers used this principal back then ( Snell, Spica and Acoustic Research to name a few ). The Dunlavy designs, ime, are not an " open " sounding speaker. Not suggesting they are not good, nor musical, just not open ( I owned horns back then, and still do ). Enjoy ! MrD. |
I do appreciate all the great info. Yes I do need to swap amps and run an A/B test. I have had some hands on experience with rebuilding a X-over with good components. My infinity RS 4.5s needed a rebuild and I had them done by Soniccraft and OMG night and day difference. Honestly I love those speakers. I have read many articles on the SCIVA'S and I'm hesitant to let anyone tear into the x-over because great effort was put into X-over and matching it to the speakers. If I could find someone that could update critical resistors and caps and still retain the intended design of the X-over, I would do it... |
A big Mac. Monoblocks, if you can afford them (cheaper, if used, abviously). If will deliver consistent power, regardless of the ohms and it will be smooth, as per your taste.
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How long have you owned the Dunlay's ? You stated someone else commented they sounded drab ? But what are your impressions of the speakers ? Flat speakers like the Dunlavy can take some getting used to compared to others that have bumps in bass and treble , don't at first come ff as exciting , but more recordings will play nicer with flat speakers Imo. |
