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In Reply to: RE: --brass equalizers- posted by tube wrangler on July 17, 2016 at 23:01:12
Novum PMR (Passive Multivocal Resonator) is a large brass bowl tuned to fill and resonate at frequencies that provide a more natural presentation and listening experience. Or at least, so it is claimed. (http://www.highendnovum.de/en/)
A friend has one and swears by it.
Not cheap. So get the dimensions and do a DIY version for pennies on the dollar.
Try a used cymbal on ebay or Craig's List first and see if it does anything you like. At least, I would try that. Or borrow a Novum, if you can. (But I would try the DIY approach anyway, just for fun.)
Follow Ups:
I have a friend that swears by it in his room/system, so I purchased one and tried it out for 30 days. I returned it, as I seriously heard no impact in my room/system. It could be one of those synergy things that depend on alignment of certain elements, but it did not align in my house.
It's similar. Same idea, no doubt.
I've always used different objects, trying to get a room to "talk"--
this one is very interesting-- thanks for the heads-up!
---Dennis---
My neighbor just up the street has the item shown in the photo posted by Winston Smith. It was quite costly, as I recall (~$1500??), and we could hear a difference with it "in" vs "out" of his system. He placed it between the speakers, as you suggest. Whether this difference in sonic character was in the realm of greatness I would not say, but I rather preferred the sound when it was in place in his rather small room in his system. Like you, this experience prompted me to move around our set of brass fireplace tools, which sit more or less between my speakers in my much larger listening room. Very similar effect but I don't claim it is quite as obvious. I also keep an eye out for large brass bowls that cost much less than $1500. However, I will grant that the tuning bowl is very thick brass in certain areas, and it has that protrusion at its center, which can be seen in the photo. This suggests that it is indeed "tuned" to resonate at certain frequencies.
It makes sense, Lew.I'm working on a new Pioneer PLX-1000
Direct-Drive turntable. Rationale for
buying this rig was that it's rugged, simple,
has proven roots (it's really a slicked-up
version of the Technics unit), and is extremely
user-friendly.At first, I was curious, so ran Pioneer's
Nagioka-made HIGH (9mv+!)output cart., just to see what
Pioneer was up to-- I wanted to know!Most of the Solid-State preamps I was able to beg/borrow,
could not stand the input-- including some BIG names.I'm going to design a good phono anyway, so didn't
want to get spendy on this, so I installed a Clearaudio
Maestro-Wood in the Pioneer TT (3.6mv.) and let it break-in.Sounded pretty good! First thing I noticed was that
the (cheapo!) tonearm was well-designed, tracked extremely
well, and didn't oscillate or resonate. WOW! And a cheapie!I love this thing! It's so much fun to use, with its
instant stop-start motor base & controls, neat Disco tricks
like variable speed/pitch on the fly (quite a few old vinyls
benefit big time from this-- some big labels, such as RCA
are correct, and do not benefit....., and it has a way-cool pop-up light
that shines on the cartridge needle at night so you don't miss
those cut-start grooves!I played around with the plinth top plate, using various
objects at my disposal. I found a small stainless-steel
Bell-- it's 3 1/2 inches in diameter by about 3 inches deep.I left the clapper in it, and while playing a record, I
placed it face-down, with its handle up-- in various places
on the TT's top plate.Right near the speed/pitch controls-- between there and the
rotating platter, was the "hot" spot-- everything has one (or several).The whole musical presentation cleaned-up like Gangbusters!
Next, for this unit, it will get 32ga. silver tonearm wiring, (as used for electronic pacemakers)-- Lloyd Walker was so kind as to turn
me onto this.. what a great guy he is!I'm having a lot of fun with this rugged, well-isolated, but
alive-sounding unit. It simply trashes my VPI/SME setup.It is capable of playing neutral, yet retrieving detail and
dynamics well, but is not yet State-Of-the-Art.. I suspect
the tonearm internal wiring big time, so am going after it, and I'm going to Extreme Phono to get a SPEED carbon-Fibre overlay, and
I got a nice Clearaudio record clamp that goes right onto the
stock spindle..The unit just kicks-ass over belt-drives (I keep trying to tell
turntable people that these belts must be natural leather-- to
prevent belt-stretch (slow-down, then speed up) cogging, but
each has a favorite polymer or rubber, and they all maintain speed
accuracy--- BUT!.The powerful DIRECT motor base of the Pioneer/Technics completely
eliminates this problem-- it KICKS ASS-- sounds alive, and it's fun.There is a sense of relentless DRIVE-- that this thing is
unflappable-- it's hard to describe.What a Play Toy! Get one and start tweaking it....
---Dennis---
Edits: 07/19/16
DIY is a great idea. I have used a silver chalice for many years. I suggest people try different household items. Candlesticks, bowls, etc.
You can actually change the central image locations by moving the item you find is effective.
True, good observations!
--Dennis--
It could be the bass station by synergistic, but there seem to be many ways to alter room nodes to your ear. I ended up looking on ebay for brass bells, bowls--anything that rings, also thrift stores. I ended up with quite a few brass pieces that ring and even made some synergistic type triangular wooden holders. When placed around the room I noticed that the "air" of the recording sounded fuller, more open with more depth. Not night and day, but similar to crystal tweaking, they work.
As far a taming bass alone, I have no clue, but if you want to do it on the cheap, try thrift stores, good luck!
I have a brass bell-- about 6 1/2 inches
in diameter, about 6 inches deep.
It has a machined relief and about a 1 inch
diameter shaft going into a round, wooden handle.
You grab the handle, and ring it...
I took the clapper out, pointed its open end at the
middle area between the speakers and stood in front
of the speakers, moving closer and further away,
and moving it up and down and trying different vertical
angles. At just the right places-- and these were
not sharply defined-- the areas found were
somewhat adjustable-- each area had quite a useful
range of options-- at these points a lot of good
happened....
Music got more interesting-- detail was better,
but it made musical sense MUCH better. Everything was
more dynamic, had a wider soundstage, had far greater
depth of images, and flowed better-- it rocked right
along. Made you WANT to listen.
Rudimentary, simple results so far, but it's an
area that will have to explored much more for sure.
Looks like I'll be giving Synergistic a phone call!
Thanks a bunch!
---Dennis---
I don't think Synergistic made that item shown above, the PMR. The URL provided goes to a German company, I think.
Great! Good luck!
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