[DVV]

Seems to me the DeZorel is suceptible to inductive effects and each component must be plugged separately, or if need be, by means of a wired in parallel power strip.  I have not read anything about this anywhere, but it is my suspicion.  Perhaps Dejan or Miki can answer the question for us...

My own findings (and you'll have to ask Miki for his/theirs) are quite to the contrary, that it is very insensitive to inductive loading. This is based on about 3 months of intensively researching it a year and a half ago, when I was preparing that piece for TNT.

But I did find something else - with some power supplies, not even that filter helps much. What I mean is this - if a power supply is well made, using quality components and in proper size to its purpose, the filter will help anything from good to outstanding. Conversly, if the power supply has a poor quality power transformer, and/or filter caps not up to the job (which, bear in mind, may also mean that they are overdue for a change because they have dried up over a certain point), the filter will not make much of a difference in overall definition and clarity, just in noise and absolute power delivery.

I saw this happen with gear ranging from very cheap to darn expensive. New Technics and Sony models profited much, but older units (older being 5+ years of age) much less. The same was true for my own Yamaha AX 592, which was heading for a cap change anyway. Immediately after changing the caps by installing identical model new ones, the difference turned drastic on me, for the better. I repeated this experience on my older Harman/Kardon 6550, also slated for cap change after 8 years of faithful service; again, immediately after the cap change, the difference was obvious and not at all small.

The third sample was a friend's Denon integrated amp, as I was asked to change the caps for him. I took the opportunity to check out this effect with that too, and sure enough, it was there.

Moving on to somewhat higher priced gear, a Krell integrated showed improvements, but not much so - quite the opposite with a power amp of theirs, costing like 3 times that integrated. Comparing their power supplies showed meagre dimensioning for the integrated (hey, a 400 VA transformer for 2x150W? Gimme a break!), but very substantial for the power amp.

The last straw was a Cyrus integrated as is, where improvements were there but hardly stunning, and that same amp with their add-on power supply, where the differences were almost stunning - literally.

It all brings me back to what I keep saying - no line filter can improve your audio, all it can do is free it to perform as best as it can, but ultimately, your audio will determine what you hear.

Why did Jerry hear a substantial difference? No brainer, Audio Research has outstanding quality and size of power supplies, always did, one of their hallmarks. Why do I hear it so clearly? Because my Harman/Kardon 680 has a very good, true dual mono power supply, and my Karan Acoustics KA-i180 also has a well designed power supply.

Anyone following the thread on amplifiers will see my very numerous references to power supplies - they can kill a model dead straight out if not done properly, and just dumping a lot of fancy capacitors inside does not make those supplies well made - just expensive.

I am sorry Dan Banquer is not in on this, because his amps use fully regulated power supplies - now there, I would expect the results to be outstanding, Dan does not skimp on the juice (fact is, he's almost as mad about them as I am, and I admit to being a freak).

I would also add one last comment - I wondered for a while why does that filter make such obvious differences with tube audio and much more unpredictable differences with solid state, until I realized a simple fact. Tube audio usually has better power supplies than solid state; note the word "usually". I checked this by using the filter on solid state products known to have very good power supplies (e.g. Naim, Mark Levinson, etc) and sure enough, I got marked differences, not at all hard to hear.

Just my thoughts.

Cheers,
DVV

[Psychicanimal]

Allright, then.

I would like to find out if the DeZorel would improve my "new" Forté 4A power amp...

If the capacitor based DeZorels do not suffer from inductive effects, then it would be good to use parallel wired power strips.

[randytsuch]

Hi DVV,
Well, if I every sent it out   , it will be interesting to see what other guys find.  Mike G just got dual mono Oddesey's, which I heard have a couple of huge supplies, so it would be interesting to see what the Delorel does on his setup.

It also gets back to things being system dependent, so you need to try it out for yourself.

This is also a reminder for you guys out there with older stuff to remember that caps do wear out.  I heard a noticable improvement in my amp when I changed out the original 15 year old electrolytic caps, and like I said, I used some pretty cheap caps as replacements.  I did bypass them with small film caps when I replaced them, so that may have helped some too.  In something like an amp or preamp, it should be pretty simple to get to the power supply, and change them out.

Randy

[DVV]

Hi DVV,
Well, if I every sent it out   , it will be interesting to see what other guys find.  Mike G just got dual mono Oddesey's, which I heard have a couple of huge supplies, so it would be interesting to see what the Delorel does on his setup.

It also gets back to things being system dependent, so you need to try it out for yourself.

When has it been any different, Randy?

Consider the variables involved - your audio, your particular power line, your particular power installation in home, etc. Who can say EXACTLY what the effects will be?

Then, you had the smallest model in the range - I can safely say that if you had a multiple filter unit on test, your results would have been different and I'm sure better, but how much better, I cannot say, much less know for sure.

Please understand, I am not disputing your findings, I accept them fully as such, that's what you heard in your home, with your audio. Not to even mention tastes, which we all have, to the last man. I'm simply reminding one and all that there are numerous variables, and because this is so, I suggested a personal audition.

What does please me tremendously is the way you guys got organized in a jiffy and put it all in motion. I am truly impressed, and I mean that.

This is also a reminder for you guys out there with older stuff to remember that caps do wear out.  I heard a noticable improvement in my amp when I changed out the original 15 year old electrolytic caps, and like I said, I used some pretty cheap caps as replacements.  I did bypass them with small film caps when I replaced them, so that may have helped some too.  In something like an amp or preamp, it should be pretty simple to get to the power supply, and change them out.

Randy

Amen to that.

Cheers,
DVV

[JoshK]

Hey Dejan,

Could you remind us what the prices are for the different models of Dezorel are?

[DVV]

Hey Dejan,

Could you remind us what the prices are for the different models of Dezorel are?

I could, Josh, but what I tell you is essentially meaningless, because you'd have to factor in the shipping costs even if buying direct, and I have no idea what these are like. The LF-A1 model circulating around cost, if memory serves, something like $120 to ship, or something like that, maybe Jerry remembers.

The point is, I have no idea how you guys get to actually buy them. I would suspect it's via their US distributor, one Bob Williams of Audio Nut, and I expcet you guys to get a one-off pricing scheme for a group buy.

If memory serves, the MSRP of the top model, the Audio Reference RP1, is something like $3K over there. But that's a big monster, their flagship, the LF-A series are way, way below that.

Cheers,
DVV

[DiNo]

Just want to update that the unit is in my hand now. Everything is in good shape.  The unit is rigged with cigarette smell as others had reported.

[DVV]

Just want to update that the unit is in my hand now. Everything is in good shape.  The unit is rigged with cigarette smell as others had reported.

Give it a go and let us know what you think, Dino.

Cheers,
DVV

[Jay S]

Just want to update that the unit is in my hand now. Everything is in good shape.  The unit is rigged with cigarette smell as others had reported.

I don't know what he did to get rid of the smell, but I can tell you that Guan's DeZorel LF-P1 which he lent me doesn't smell of smoke.  I didn't notice a smell on his Audio Reference Senior either.

[DVV]

I don't know what he did to get rid of the smell, but I can tell you that Guan's DeZorel LF-P1 which he lent me doesn't smell of smoke.  I didn't notice a smell on his Audio Reference Senior either.

Well, it's fairly obvious by now somebody in between smokes Fidel Castro -like havannas, and did so while inspecting the unti, possibly also opening it up while enclosing it in a thick cloud of spicy smoke.

Possibly the competition never sleeps, too.

Can anyone tell if if it's cigarette, cigar or grass smoke?

Cheers,
DVV

[Psychicanimal]

I would really like to know what's the scoop with these DeZorel filters.  Dan Wright is going to mod my Marchand X9 crossover and I'm deciding on whether I should have a couple of Bybee filters installed ($170 USD) or getting a DeZorel.

Here I have all this wacked out, conflicting information, and on the other side of the Atlantic Ocean I have trusted people like Hans-Martin and Roberto Petti who swear by the DeZorel's.  Hans e-mailed me it's the best filter he's ever used and I recently purchased some Goldmund Cones from Roberto and we've been corresponding about audio subjects.  Go figure...

[JoshK]

What conflicting responses have you heard?  I think you should still go ahead with the bybees even if you decide to get a Dezorel.  All these filters are additive in their affect.  The more the better.  Bybees are awesome!  The dezorel seems to be praised by many americans here too.  Apparently it isn't like a lot of standards american line filters.  Maybe it produces its best results in european like conditions but I highly doubt that it the case or else they wouldn't be so popular for hospitals, etc.

[Ron D]

I posted a review of what I think is the same unit over in the Critic Circle for those who would like to read a little more. I'd like to advise that if you can piggyback on the current audition circuit you should try it out.

[DVV]

I posted a review of what I think is the same unit over in the Critic Circle for those who would like to read a little more. I'd like to advise that if you can piggyback on the current audition circuit you should try it out.

So what's the link, Ron?

Cheers,
DVV

[Ron D]

Not sure what you are asking but I guess this could be it...

http://www.audiocircle.com/index.php?topic=931


Hopefully this works for those who want to click over...

Ron

[DVV]

Not sure what you are asking but I guess this could be it...

http://www.audiocircle.com/index.php?topic=931


Hopefully this works for those who want to click over...

Ron

Duh ... yep, that's it Ron, thank you, I never connected it in my head.

Cheers,
DVV

[JackStraw]

I would really like to know what's the scoop with these DeZorel filters.  Dan Wright is going to mod my Marchand X9 crossover and I'm deciding on whether I should have a couple of Bybee filters installed ($170 USD) or getting a DeZorel.

Here I have all this wacked out, conflicting information, and on the other side of the Atlantic Ocean I have trusted people like Hans-Martin and Roberto Petti who swear by the DeZorel's.  Hans e-mailed me it's the best filter he's ever used and I recently purchased some Goldmund Cones from Roberto and we've been corresponding about audio subjects.  Go figure...

I think that the wacked out, conflicting info suggests different results in different areas with different systems. My advice would be to PM audiojerry immediately and get in on the group audition @ $20 that you'll probably get back.

Oh yeah, DVV -- you're welcome for BBQ anytime. As goes with the rest of 'yins.

[DVV]

I think that the wacked out, conflicting info suggests different results in different areas with different systems. My advice would be to PM audiojerry immediately and get in on the group audition @ $20 that you'll probably get back.

Right, that's what I also suggested, the only way to really know.

Oh yeah, DVV -- you're welcome for BBQ anytime. As goes with the rest of 'yins.

Thank you kindly, Jack. I last set foot on Maryland territory in 1970, but who's to say I won't do it again, seeing as how every criminal always returns to the scene of the crime.

Cheers,
DVV

[randytsuch]

I think it's the box and packing that smells like smoke now, so whenever you put the unit back in the box, it smells again.

BTW, forgot to mention one thing.  When I told my wife what was in the box, and how we were auditioning this unit, she said "you guys REALLY need help"

Randy

[JoshK]

Got similar reaction from my wife Randy.