HDTenEightyP/NetNews huggingface dataset:
From: tom@minster.york.ac.uk
Subject: re: AR M-1s
Originator: tjk@csd4.csd.uwm.edu
Organization: University of Wisconsin - Milwaukee
Date: Mon, 13 Apr 1992 12:53:57 GMT
Via: sun3.nsfnet-relay.ac.uk; Fri, 10 Apr 1992 16: 05:25 +0100


Ari Solomon writes:

>>
>>I agree that their sound belies their size but
>>I have a serious objection about their shrillness...
>>I'm surprised that TAS didn't disqualify them immediately


The review that I read of the AR M-1s in the UK (Hi-Fi News, Ken Kessler)
actually did say the same things about the M-1s top-end that you
have noted.  However, the quirky thing about this budget speaker appears
to be that it revels in high-end amplification.  The UK review said
that it was a waste of time trying to use these speakers with
anything other than very high-end amplifiers because the tweeter
was ruthless with less then ideal amplification.

I haven't heard them myself, I'm just commenting on what the review
said.  As TAS demoed these things with the Cello amps I guess they
didn't find a problem (Mark Levinson apparently LOVES these speakers
with Cello amplification).  Perhaps the TAS review didn't stress
this need for first class amplification quite as clearly.

Regards.

Tom.


____________________________________________________________
 Tom Jackson,			       | One thing about intellectuals;
 Advanced Computer Architecture Group, | they proved that they can be
 Dept. of Computer Science,   	       | absolutely brilliant and have
 University of York, Heslington,       | no idea what's going on. 
 YORK. YO1 5DD.  UK.		       |     Woody Allen  - 'Annie Hall'
  Tel: [044] (0904) 433747
 tom@uk.ac.york.minster			JANET
 ____________________________________________________________




Newsgroups: rec.audio.high-end
From: met@icd.ab.com (Mark E. Taylor)
Subject: Tape head cleaners and de-magnetizers - reccomendations.
Originator: tjk@csd4.csd.uwm.edu
Organization: Allen-Bradley Company, Inc.
Date: Wed, 15 Apr 1992 13:08:45 GMT

Hi all,

As the subject line says, I need to get a new head cleaner and
de-magnetizer.  What's out there these days that does a good job, but
is also AFFORDABLE.  Any help would be appreciated.  If you want to
email me, I'm at met@icd.ab.com.

Thanks in advance.

Newsgroups: rec.audio.high-end
From: ampex!dna@decwrl.dec.com (David Altekruse)
Subject: Re: Speaker placement ?
Originator: tjk@csd4.csd.uwm.edu
Keywords: Speaker placement listening room
Organization: Ampex Corporation, Redwood City CA
Distribution: usa
Date: Wed, 15 Apr 1992 13:12:35 GMT

Rajiv Sud writes:
>
>The general guideline for speaker placement is about 5 to 7 feet apart,
>slightly toed in, and 2 to 3 feet away from the back wall. What happens
>after this depends on the type of speakers and the room. With all
>speakers I find damping the wall behind the listener (hung blanket or
>curtains) helps a great deal. With box speakers I also find damping the
>wall behind the speakers also helps a lot.
>
>You'll also find that having the speakers on a stable stand with
>tiptoes will help out a great deal. 
>(etc.)

After a lot of experimentation I've found that the best place for my 
Magnepan MG-III's in my room for my tastes is about 10 feet apart and at 
least 8 feet from the back wall with no extra sound absorption on the 
back wall.  Since these speakers are 6 feet tall, putting them on a stand 
looks a bit strange.  (Actually, I tried raising them a bit once.  The 
main effect was to decrease and muddy the bass which was not desirable.)

The interaction of speakers in a room is a complex subject. There 
are several good books on music acoustics.  I like the "TAB" book 
(can't remember the exact title) which is interesting, doesn't cost 
too much, and is available in most larger bookstores.  Then forget
all guidelines you've ever heard and experiment. Often the best
speaker and listening position will not be where you would expect
(and unfortunately, where they would fit in with your decor).

David Altekruse, dna@ampex.com
From: sp3u+@andrew.cmu.edu (Shiv Swarup Pathak)
Newsgroups: rec.audio.high-end
Subject: CD PLAYERS: is compact good?
Date: 6 Apr 92 12:50:40 GMT
Article-I.D.: andrew.gdruNy_00iUx83Z69q
Organization: University of Wisconsin - Milwaukee
Originator: tjk@csd4.csd.uwm.edu


HELP ME!!
I have an 100watt/ch Kenwood KVR-6040 reciever with a Cambridge
Soundworks Ensemble (2 sattelite/2 subwoofer system).  I cannot decide
whether to buy a CD player which is compact or not for the purpose of
running it through my speakers and reciever.  Portability is nice, but
if it costs extra money (does it?) and/or sacrifices sound quality, I
wouldn't want it nor do I need it.  Basically, I have about $300 dollars
to spare and I want the best sounding CD player I can buy (portable or
not) for my system and for the money.  I really don't care to much about
features (all I want is suffleplay and resume) as I do about sound
quality.  I know there is no one answer, but are there and suggestions
for audiophiles out there?  Thanks in advance.

-Shiv
Newsgroups: rec.audio.high-end
From: till@acid-rain.lucid.com (Don Tillman)
Subject: Re: DIY: Analog Switches as input source selectors
Originator: tjk@csd4.csd.uwm.edu
Reply-To: till@lucid.com
Organization: Lucid, Inc.
Date: Tue, 14 Apr 1992 13:06:18 GMT

   From: mlloyd@ihlpk.att.com
   Organization: University of Wisconsin - Milwaukee
   Date: Mon, 13 Apr 1992 12:55:34 GMT

   I am contemplating using analog switches as source selectors in a
   opamp based preamp/control center I am designing. 
[...]
   At present, I will probably use the approach of virtual ground 
   switching (at least as several app notes call it). In this configuration,
   the op amp is configured for inverting mode, unity gain (Rinput 
   = Rfeedbk).  A switch (Analog Switch 1) and series resistor (Rinput)
   per input are connected to the op amp inverting input.

The inverting configuration is maximally sensitive to analog switch
non-linearities, requires a lot of feedback, and has the side effect of
inverting the signal, so I'd avoid it at all costs.  Far better to just
use a switch and a follower of the appropriate technology.

   Some databooks I have seen connect a leftover switch (Analog Switch 2)
   in series with the feedback resistor (Rfeedbk) to provide some degree of 
   cancellation of the resistance variation of the switch on the input as 
   the voltage across the device changes. I like this idea and will probably
   use this scheme as well.

Right, "some degree" is the key phrase.  It's certainly better to be
insensitive to the device's non-linearity in the first place instead of
correcting for it in a feedback loop.

   Anyway, my question is has anyone out there already gone through
   whatever grief I am setting myself up for? What kinds of problems 
   did you run into? As a few examples:

   1. I am concerned about the switch providing significant additional 
      capacitance between the op amp's inverting input and ground 
      usually a no-no), so I'll have to compensate for that.

Another reason to avoid the inverting configuration.  This isn't an issue
with the switch/follower approach.

   2. I expect that I'll have to go through some number of iterations of
      pcb layout to minimize crosstalk between inputs, channels, etc.

A T switch configuration will surely eliminate crosstalk between channels.
And of course a well thought out circuit layout is a requirement from the
get-go.

   3. The switching FETs have enough capacitance spread around that
      I'll have to worry about charge injection when applying control
      signals to change inputs. This effect could manifest itself as 
      audible clicks, for example. 

An RC network on the control signal input should eliminate this problem.

  -- Don Tillman, till@lucid.com
From: HENSONSA%WHITMAN.BITNET@CORNELLC.cit.cornell.edu
Subject: Re: Linaeum
Originator: tjk@csd4.csd.uwm.edu
Organization: University of Wisconsin - Milwaukee
Date: Tue, 14 Apr 1992 13:04:12 GMT

Just thought I'd throw my two cents worth in.

There is a high-end store down on Glisan in Portland called Corner Audio (quite
near where Linaeum builds speakers).  They carry Linaeum (along with
AtmaSphere, Quicksilver, Sota, TARA Labs, Klyne, Rotel, Wadia, Audio Alchemy,
Threshold, Martin-Logan, Spica, and a few others I cannot recall).  I managed
to hear the Linaeum speakers driven by a Rotel amp and other Rotel ancillaries,
as well as driven by a Quicksilver/AtmaSphere/Audio Alchemy/Sota setup.
Needless to say, I was blown away by the musicality of the system.  While I'm
sure the front end and amps contributed much to the sound, the speakers had the
sweetest midrange and highs I have heard in a *long* time.  They were a tad
bass shy, which could also be attributed to the tubes, but not enough to
subtract from the sound.

If you have a chance to listen to the Linaeum, jump at it and enjoy the music!


Derek van Veen
Walla Walla, WA

(anyone want any onions?)


Newsgroups: rec.audio.high-end
From: mhauser@cutie.acns.nwu.edu (Marc Hauser)
Subject: Archives?
Originator: tjk@csd4.csd.uwm.edu
Organization: Northwestern University, Evanston, Illinois
Date: Mon, 13 Apr 1992 12:55:03 GMT

Just wondering, is there an archive for posts to this newsgroup, and if  
so, where can I get at them?

[You can get them via anonymous FTP from csd4.csd.uwm.edu:pub/high-audio. -tjk]

Thanks!


Marc Hauser
mhauser@courtney.acns.nwu.edu

Newsgroups: rec.audio.high-end
From: ari solomon <ASOLOMO@AUVM.AMERICAN.EDU>
Subject: Re: AR M-1's
Originator: tjk@csd4.csd.uwm.edu
Organization: The American University - University Computing Center
Date: Mon, 13 Apr 1992 12:54:30 GMT

  Doug Alan points out that the signature of the front-end could be responsi-
  ble for the different character of the AR M-1's in my system vs. in HP's
  system. That's why I took them to a high-end loudspeaker dealer (The Speaker
  Factory, here in Maryland) and checked them out on his expensive, very warm/
  soft-sounding tube system. I know the sound of that system with other mini-
  monitors, in the same room, same placement, and it's very mellow.  No such
  luck with the AR's!  If one needs to buy the Cello front end in particular
  in order to have the AR's sound livable/neutral, then the AR's no longer
  seem like a bargain. I should repeat that HP did acknowledge the "distract-
  ing" resonance at 3Khz, but proceeded to rave about the speakers as a tremen-
  dous bargain, wonderful "musicality", for an aspiring audiophile. My own
  sense is that for an aspiring audiophile even w/typical 'soft' tube front end
  and a normally-damped living room, the AR's shrillness disqualifies them
  from consideration. The longer I live with them, the *more* I feel that way.
      Interestingly, I've gotten a lot of E-Mail from others who auditioned the
  M1's versus Missions or Celestions, and some who took both the M1's and a
  Mission or Celestion home with them -- all said they disqualified the M1's
  for their shrillness. One person asked how AR could allow the M1's to go on
  in production without correcting the cabinet/tweeter resonance. I don't know
  the answer.  Any suggestions for doing so now?

Newsgroups: rec.audio.high-end
From: oracle!us.oracle.com!eoates@uunet.UU.NET
Subject: Re: speaker recommendations
Originator: tjk@csd4.csd.uwm.edu
Organization: Oracle Corporation, USA
Date: Thu, 9 Apr 1992 12:55:51 GMT

In article <1992Apr2.225844.6743@photon.uucp>, photon.photon!bvs@uunet.UU.NET (Bruce Shetler) writes:
> It is with some trepidation that I tread into the waters of
> audio.high-end :-)
> 
> I am currently looking at upgrading my mid-fi system and I think
> better speakers are what I'm looking for.  Currently I have a rather
>...stuff deleted... 
> Vandersteen 2ce
> Magnepan (can't recall the model about $2K, 6' high)
> Thiel (also can't recall $2.2K)
>...more stuff deleted... 
> Bottom line so far is that the Magnepans just blew me away - absolutely
> great, with the Vandersteens in second place.  I just love the
> openness and three dimensionality of the Magnepans, in fact, I'm
> bringing a pair home this weekend for an extended audition.  I would
> solicit advice on other brands and models to try in this price range
> as well as general advice on this upgrade strategy and general purchasing
> information.  Thank you all in advance, hope this is high-end enough ;-)
> 
> Bruce
> 

If you don't want a lot of dynamic range (softest soft to loudest loud), and
don't need much base, the Maggies are fine.  I had the Tympany IV's (two bass
panels each side plus the 6' ribbon) for two
years - the sound stage is great, very transparent, etc., but no LOUDness or
bass for organ music or rock and roll.  Subwoofing is not recommended - cones
don't match well with ribbon and planar speakers.  I upgraded to Infinity IRS
V.

Ed Oates (my opinions, not ORACLE's)

Newsgroups: rec.audio.high-end
From: Shau Tsung Yu <syu@mcnc.org>
Subject: Mac and Marantz
Originator: tjk@csd4.csd.uwm.edu
Organization: University of Wisconsin - Milwaukee
Date: Thu, 9 Apr 1992 12:55:08 GMT

Hi ! I am new to this group, and I am seeking for advices from people in this group who own such a classic tube machine like Marantz 8B or Mac MC225 or MC240.
Currently I am thinking of getting one of such classics, I know it's hard, and it probably will be my only tube power in the future, so I hope there is someone
in this group would like share their experiences with me.

1) Are they really that good ? (for a decent one). How about comparing them withsimiliar output modern tube machines ? like CJ MV 50 or ARC D40 ? 

2) The going price on audiomart is $800-1000 for 8B, $500 for MC225, and very demanding. For that price ,you can get a much newer machine like MV50 or D40, is it worth it? if you want to keep it for certain period of time and as the only tube amp you own.

3) I am a forign graduate student here in NC, and thinking of getting a system
consisting of such a tube classic + old QUAD or 3/5A, is someone out there own
similiar set-up ? Can they compare with modern stuff in terms of musicality, neutrality, 3-D imaging....etc ? Forget the low end, of course.

4) If you have one for sale, please drop me a line. 
Thank you all, and have a nice day.

Please e-mail me at syu@ee.egr.duke.edu or
                    syu@alvin.mcnc.org
Shaun Yu


Newsgroups: rec.audio.high-end
From: 0206420@NORTHWEST.MISSOURI.EDU (HEY, GIRL, HOLD ME TIGHT...)
Subject: Cleaning Denon Horizontal Loading Cassette Decks
Originator: tjk@csd4.csd.uwm.edu
Organization: University of Wisconsin - Milwaukee
Date: Wed, 15 Apr 1992 13:10:21 GMT

I feel that the best way to clean the Denon horizontal loading cassette decks
would be to take the top off of the unit and see if the accessibility is any
better.  You may want to try it with the drawer in the out position to provide
direct access to the heads, capstan(s), and roller(s).  Though this is in 
violation of the warranty by removing the cover, if care is taken, even
the warranty center wouldn't know (smile).

Mark Larma
0206420@Northwest.Missouri.Edu

Newsgroups: rec.audio.high-end
From: europe@europe.corp.sgi.com (Patrick Renvoise)
Subject: Re: DAC & CD Stuff (was Rotel)
Originator: tjk@csd4.csd.uwm.edu
Keywords: CAL, Creek
Organization: Silicon Graphics, Inc.
Date: Tue, 7 Apr 1992 12:40:50 GMT

Hi every body,

I own a Audio Alchemy DDE which gives me great satisfaction (especially
when I know that it will be upgradable to their next generation, which
will be, as we can expect, better sounding).

I have heard the Sonograph 22 from Conrad & Jonhson: at $850 it is a
real good deal. It does every thing well from sound stage, to clarity,
to imaging,... and more important it really put you in touch with the
emotion of the music.

The rest of my system is made with the PV8 and MV52 tube gears from
C&J. I've always thought that they have very good price/performance
equipments, but that they were not really recognized by the high-end
community.  Fortunately three recent articles of Stereophiles (PV11
preamp, evolution 2000 amp and Sonograph 22 CD player) are giving them
good if not excellent reviews and I believe that they deserve them.
C&J  has an interesting design philosophy:  they come up with a very
simple design but they use the best components.

I would like to encourage all of you who are looking for a lot of MUSIC
without a lot of MONEY to listen to C&J.


-- 
Patrick Renvoise 
Silicon Graphics International Marketing (415)962-3525
/----------------------------------------------------------------------\
| "Il faut cultiver notre jardin." Voltaire (last phrase of Candide)   |
| "One must cultivate our garden." (Waiting for a better translation)  |
\----------------------------------------------------------------------/

Newsgroups: rec.audio.high-end
From: mlloyd@ihlpk.att.com
Subject: DIY: Analog Switches as input source selectors
Default-Options: /receipt
Originator: tjk@csd4.csd.uwm.edu
Cc: mlloyd@ihlpk.UUCP
Organization: University of Wisconsin - Milwaukee
Original-From: ihlpk!mlloyd (Michael Lloyd +1 708 713 5497)
Date: Mon, 13 Apr 1992 12:55:34 GMT

DIY'ers:

I am contemplating using analog switches as source selectors in a
opamp based preamp/control center I am designing. There are a few 
very promising sounding (spec-wise at least) parts available to do 
this, including some really low distortion switches from PMI/Analog 
Devices. Some models being considered are DG485, DG565, DG441, DG411,
DG5000, SSM2402, SSM2404.

At present, I will probably use the approach of virtual ground 
switching (at least as several app notes call it). In this configuration,
the op amp is configured for inverting mode, unity gain (Rinput 
= Rfeedbk).  A switch (Analog Switch 1) and series resistor (Rinput)
per input are connected to the op amp inverting input.


In>---Rinput---Analog Switch1---|---Rfeedbk---Analog Switch2---|--->Out
                                |     __________________       |
                                |    |                  |      |
                                |____|- in              |      |
                                     |              out |______|
                                 ____|+ in              |
                                |    |       OP AMP     |
                                |    |__________________| 
                                | 
                              Ground

Some databooks I have seen connect a leftover switch (Analog Switch 2)
in series with the feedback resistor (Rfeedbk) to provide some degree of 
cancellation of the resistance variation of the switch on the input as 
the voltage across the device changes. I like this idea and will probably
use this scheme as well.

Anyway, my question is has anyone out there already gone through
whatever grief I am setting myself up for? What kinds of problems 
did you run into? As a few examples:

1. I am concerned about the switch providing significant additional 
   capacitance between the op amp's inverting input and ground 
   usually a no-no), so I'll have to compensate for that.
2. I expect that I'll have to go through some number of iterations of
   pcb layout to minimize crosstalk between inputs, channels, etc.
3. The switching FETs have enough capacitance spread around that
   I'll have to worry about charge injection when applying control
   signals to change inputs. This effect could manifest itself as 
   audible clicks, for example. 

Yes, I know I can use relays to do this switching. I would rather 
not use them.

If you have some comments you think would be useful to a significant
number of folks, think about putting "DIY" in your message header
before you ship it out.
Otherwise, just send me email and if there is enough interest, I'll
certainly post a summary of the comments.

Thanx,
Michael Lloyd

Newsgroups: rec.audio.high-end
From: 900377c@aucs.acadiau.ca (Robert Campbell)
Subject: Mission 767?
Summary: Heard It?
Originator: tjk@csd4.csd.uwm.edu
Keywords: Speaker
Organization: Acadia University
Date: Mon, 6 Apr 1992 12:50:22 GMT

Having been out of audio circulation for some while, I was wondering
if anyone had ever heard the Mission 767 (the number may be
incorrect). Supposedly, this was to be quite a system, consisting of
two three-way speakers each housing its own Cyruss-two amplifier. Let
me know...

Rob Campbell, still .sigless
From: weems@cs.umass.edu (CHIP WEEMS)
Newsgroups: rec.audio.high-end
Subject: Hafler mod source
Date: 9 Apr 92 12:56:07 GMT
Article-I.D.: cs.8APR199218555007
Organization: University of Massachusetts CS Department
News-Software: VAX/VMS VNEWS 1.41
Originator: tjk@csd4.csd.uwm.edu



Somehow, the first line from my last post was deleted. It should have begun:

Another source of Hafler mods is Northwest Audio Labs in Corvallis, OR....

Chip
Newsgroups: rec.audio.high-end
From: seyfried@inf.ethz.ch (Michael Seyfried)
Subject: I need an article
Originator: tjk@csd4.csd.uwm.edu
Organization: Dept. Informatik, Swiss Federal Institute of Technology (ETH)
Date: Thu, 9 Apr 1992 12:56:35 GMT

Dear netters !

I am looking for an article on high-end pre-amps (& power-amps ?) which 
appeared in the british Hi-Fi magazine "AUDIOPHILE" in November 1991. 
I believe amps were the main concern of that issue of the magazine.

I would be very grateful if anybody could supply me with information concerning
either  a) where to get that special issue (11/91)
or      b) how I can get a xerox copy of the article.

I would also be very glad, if someone could mail me a short summary of the pre-
amp review (I am especially interested in the results of the NAIM pre-amp(s)).

Thanks a lot in advance.

                                     Michael


-----------------------------------------------------------------------------
| MY personal favourite:                |    Michael Seyfried               |
|      "Digital for satellites,         |    ETH Zurich, Department of CS   |
|                   Analog for music !" |    Switzerland, Europe            |
|  ( Ad by British High-End Amplifier   |    mail: seyfried@inf.ethz.ch     |
|    manufacturer NAIM )                |                                   |
-----------------------------------------------------------------------------


Newsgroups: rec.audio.high-end
From: CSCHLEE%CPHKVX.bitnet@YaleVM.YCC.Yale.Edu
Subject: Re: Sumiko Blue Point comments
Originator: tjk@csd4.csd.uwm.edu
Organization: University of Wisconsin - Milwaukee
Date: Thu, 16 Apr 1992 14:05:32 GMT
   with BSMTP id 9872; Thu, 16 Apr 92 02: 09:02 EDT

Here is my experience with the cartridge. I fitted it in a Sota SME-V set up.
The result surprsied me. Sure, it does not extract the last details from
the grove and its HF extension is not as good as some top mc models. But
it is very natural with good sound staging. I feel no hurry in returning
to the Monster Cable Genesis it replaces. Lasse Ohlsson's negative experience
might be due to incompatibility with the Roksan turntable. This actually is
not very convincing to myself since I find the Blue Point to be less
sensitive to VTA and other adjustmnet than most mc cartridges.

Regards,

CH Lee

Newsgroups: rec.audio.high-end
From: mailrus!gatech!mit-eddie!media.mit.edu!nessus@uunet.UU.NET (Douglas Alan)
Subject: Re: AR M-1's
Originator: tjk@csd4.csd.uwm.edu
Organization: Kate Bush and Butthole Surfers Fandom Center
Date: Fri, 10 Apr 1992 14:04:43 GMT
	(queueing-rmail) id 173836.976; Thu, 9 Apr 1992 17: 38:36 EDT

In article <92099.214722ASOLOMO@auvm.american.edu> ari solomon
<ASOLOMO@AUVM.AMERICAN.EDU> writes:

>      I recently purchseda pair of AR M-1's sight-unseen, on the
>    basis of consist- ently strong reviews. I agree that their sound
>    belies their size, but I have a serious objection to
>    their...shrillness. [...]  Frankly, I'm surprised this sibilance
>    didn't disqualify them immediately in HP's review in TAS.

Didn't the reviewer in TAS say that he had to use them with a $3000
amp or they would sound too shrill?  (The claim was that cheaper amps
are usually shrill and this combined with the brightness of the AR
M-1's is too much.)  It seems to me that a much cheaper paramteric
equalizer would do the job as well.

|>oug /\lan