HDTenEightyP/NetNews huggingface dataset:
From: pan@bambam.sbi.com (Paul Pan)
Newsgroups: rec.audio.high-end
Subject: CAL Icon mkII or Sigma DAC
Date: 16 Apr 92 14:03:54 GMT
Organization: Salomon Brothers Arbitrage Support, NY,NY
Originator: tjk@csd4.csd.uwm.edu


I'm currently using a Denon DCD 1560 as my primary CD player and 
I'm thinking of upgrading. I find this player to be a little too
bright. I've listened to the CAL Icon mkII and liked it very much.
I've also heard very good things about the Rotel 955AX.

I'm also considering using the Denon just as a transport and hooking 
it to the CAL Sigma DAC. 

If anyone has any opinion/experience/suggestion with respect to any
of the mentioned components, I would appreciate hearing them. 

Thanks!


-- 

Paul L. Pan	(pan@daffy.sbi.com)
Newsgroups: rec.audio.high-end
From: Tom Ascher <U15310%uicvm.uic.edu@OHSTVMA.ACS.OHIO-STATE.EDU>
Subject: AE-1'S also need $$$ amp?
Originator: tjk@csd4.csd.uwm.edu
Organization: University of Illinois at Chicago
Date: Mon, 13 Apr 1992 12:55:10 GMT
 BSMTP id 7636; Fri, 10 Apr 92 15: 37:41 EDT

I noted in a recent posting about AR M-1's mentioning that the M-1's
need a $3,000 amp not to sound harsh.  I wonder if this is the problem
I'm experienced with my Acoustic Energy AE-1's?  All the reviews I've
read the last couple of years proclaim AE-1 the best small speaker made.
Yet, they sound harsh to me and I'm ready to get rid of them.
I've been driving them with a $1500 NAIM 140.  Maybe this isn't good enough?
What would I need to drive these?  Or is the AE-1 over rated?   I also have
a pair of the old Proac R-1's which seem much smoother to my ears.  I've
heard that the new Proac R-1's that just came out are even better.  Any
suggestions on what to do before I unload the AE-1's from someone who
has had a bit of experience with top rated SMALL speakers?
Tom Ascher - University of Illinois at Chicago
Phone: 1-312-413-3665
email: (U15310@UICVM.uic.edu) or  (UICVM.uic.edu!U15310)

Newsgroups: rec.audio.high-end
From: ansonmah@vnet.ibm.com
Subject: Re: D/A converter builder books?
Originator: tjk@csd4.csd.uwm.edu
Organization: IBM Canada Ltd. Laboratory, Toronto
Newsgroup: rec.audio.high-end
Date: Thu, 9 Apr 1992 12:55:17 GMT

Hendra,

See "Technique bosters dc-to-audio converters" by Anne W. Swager in
the Sept. 2, 1991 issue of EDN.  At the end of the article is a list
of DAC suppliers.

I have used this list to obtain such a design book from Philips
(I was and still am interested in their DAC7;  UltraAnalog is next).
If you can't find the issue, here are some addresses:

Philips Components-Signetics        Burr-Brown Corp
811 E. Arques Ave.                  6730 S. Tucson Blvd
Sunnyvale, CA  94088                Tucson, AZ  85734
(408) 991-2000                      (602) 746-1111
FAX (408) 991-2069                  FAX (602) 746-7401
Craig Aine or Ken Wong              Randy Skinner

UltraAnalog Inc
47747 Warm Springs Blvd
Fremont, CA  94539
(415) 657-2227
FAX (415) 657-4225

--
Anson Mah      ansonmah@vnet.ibm.com
From: chrisc@gold.gvg.tek.com (Chris Christensen)
Newsgroups: rec.audio.high-end
Subject: Re: Open Reel Decks
Date: 16 Apr 92 14:05:11 GMT
Organization: Grass Valley Group, Grass Valley, CA
Originator: tjk@csd4.csd.uwm.edu


In article <9204132008.AA00373@laforge.ksc.nasa.gov.ksc.nasa.gov> 
sdavis@laforge.ksc.nasa.gov (Steve Davis) writes:

>  I have recently acquired two old Teac open reel decks:  an A6300
>and an A4300-SX.  Are there any reel-to-reel enthusiasts out there?
>If so, I have a few questions:
>
>1.  Where is a good place to order a calibration tape?  What kind do
>    I need to set up the deck, as well as an outboard Dolby B
>    processor?

STL, Standard Tape Lab,inc
415-786-3546

MRL, Magnetic Reference Lab,Inc
415-965-8187

The set-up of the outboard Dolby B unit (assuming you only want to set
up a functioning unit with a functioning deck). Only reqiures that the
levels be matched between the NR and the deck.

>2.  Is there still a company that sells empty metal reels, 7.5" and
>    10"?

These suplies are available through your locak pro audio dealer.

>3.  Are there any used record stores that specialize in used
>    prerecorded reel tapes?

I don't know

>4.  What are the advantages/disadvantages of back-coated tape?

I don't know the specifics but the Handbook for Sound Engineers is
good start.  You can also write Ampex or Scotch and ask them.  I also
remember reading about it in the Por trades, Mix, RE/P, etc.

>5.  One of my decks has a terrible mechanical alignment problem.  It
>    plays and records great, but it winds the tape off-center on the
>    take-up reel, so that it squeals as it rubs against the back side
>    of the reel.  Is there an adjustment to correct for this?

Reel table height, usually accessible from the side of the machine
behind the side panel.

>  Thanks in advance for any help I can get.  Please respond directly,
>if possible; I'll post a summary to the list.

OOPs.....

-- 
Chris Christensen                  The opinions I express are my own,
chrisc@gold.gvg.tek.com            and sometimes they are wrong!
916-478-3419 FAX 916-478-3887      After all, I AM only human.
From: tarr-michael@CS.YALE.EDU (Michael J. Tarr)
Newsgroups: rec.audio.high-end
Subject: Re: CAMBRIDGE SOUND WORKS ENSEMBLE
Date: 15 Apr 92 13:11:39 GMT
Article-I.D.: cs.1992Apr15.011206.5055
Organization: Department of Psychology, Yale University
Originator: tjk@csd4.csd.uwm.edu


I would like to add a bit of a "high-end" comment about the Cambridge
SoundWorks Ensemble (the original). While I have not had extensive
experience with them, my uncle-in-law who happens to be the recording
engineer for the Chicago Symphony (WFMT Broadcasts...) has a pair (?)
driven by Apt-Holman electronics. The few times I have heard it, the
sound was very nice. Of course this is with original master tapes which
DO sound better. Remember, he listens to the CSO live or through B&W
801's all day long! So that have to at least be tonally accurate or he
would have shipped them right back. I know he is quite pleased.

Have fun.
Mike Tarr
From: tapscott@xerox.com (Peter Tapscott)
Newsgroups: rec.audio.high-end
Subject: Re: Interesting Amplifier Design
Date: 15 Apr 92 13:09:51 GMT
Article-I.D.: parc.1992Apr13.235619.5274
Reply-To: tapscott@xerox.com (Peter Tapscott)
Organization: Xerox PARC
Originator: tjk@csd4.csd.uwm.edu





Michael Lloyd writes:

>  does anybody have any tips, hints, horror stories, etc.
> on building or otherwise acquiring housing for a homebrew amp with 
> a 25 lb toroidal xformer and big heatsinks (apprx 8"x12")?

Actually, I have been wondering the same thing myself. The standard 19"
rack seems like a very strange way to build a big amp. I think people
build amps this way because history dictates that is the best way.

The tube amps use a slightly more free thinking approach, but tube amps
need to dissipate heat differently than a solid state design.

One solution is to use a tower design. The heavy transformer goes in
the bottom with the power cable and line filter, the rectifiers and caps 
are the next layer. The amplifier boards are above
that. The heatsinks can be long extrusions covering 1 or all the sides
of the tower. With a handle on top, this design woulb be easy to relocate.

This would be a great design for mono-blocks that are situated just
behind speakers -- where a 19" rack design would be obtrusive. Why stop
with mono-blocks, why not bi-amped stereo amps behind each speaker?

One source for a chassis would be a PC tower chassis. These are readily
available for a modest cost, though I don't have figures to back me up.
-- 
** Peter Tapscott, Xerox - Palo Alto Research Center
** Internet: tapscott.parc@xerox.com    XNS Net: Tapscott:PARC:Xerox
** 415 812-4352
Newsgroups: rec.audio.high-end
From: weems@cs.umass.edu (CHIP WEEMS)
Subject: Hafler mod source
Originator: tjk@csd4.csd.uwm.edu
Organization: University of Massachusetts CS Department
Date: Wed, 8 Apr 1992 13:08:50 GMT


(I think that's the new name, when I was there eons ago, it was just the
Stereo Repair Service). Anyway, I know the owner, Jim Ott, and can attest
to the fact that he's a really straight-shooting guy. Basically, he's
a service technician and designer with years and years of experience
who got tired of fixing broken gear, and turned a series of Hafler mods
that he developed for himself into a side business (he's also a regular
retailer now). I'm sure that if you give him a call, he'd be willing
to talk about some of the things he does to the amp, and maybe even
sell you parts.

Chip
From: bulgak@vax2.concordia.ca (BULGAK, AKIF ASIL)
Newsgroups: rec.audio.high-end
Subject: Recommendations are requested for an interconnect for Rotel CD player
Date: 9 Apr 92 12:55:59 GMT
Article-I.D.: vax2.8APR199214150350
Organization: Concordia University
          8 Apr 92 18: 14 GMT
News-Software: VAX/VMS VNEWS 1.41
Originator: tjk@csd4.csd.uwm.edu


I have recently acquired a Rotel RCD 965 CD player as a secondary source
to my system. I would like to request your recommendations for a good
interconnect that would also match with the rest of the system. The analog
signal exiting the Rotel CD player will flow through the following: Your
recommendation of an interconnect --> Krell KSP 7B preamplifier --> Cardas
Twinlink interconnects --> B&K ST 140 Monoblock power amps --> AudioQuest
Black biwired speaker cables --> Martin Logan Squel II speakers.

I would appreciate it, if you would forward your recommendations to
bulgak@vax2.concordia.ca

Thanks in advance.

Akif A. Bulgak
Concordia University
Montreal, Quebec Canada
From: wkung@sail.uwaterloo.ca (Bill Kung)
Newsgroups: rec.audio.high-end
Subject: Re: Sumiko Blue Point comments
Keywords: overrated
Date: 15 Apr 92 13:10:00 GMT
Article-I.D.: watserv1.1992Apr14.005106.6772
Organization: University of Waterloo
Originator: tjk@csd4.csd.uwm.edu

To add a few comments about the Sumiko Blue Point:

I have a Sumiko Blue Point with a Linn LP12 Valhalla/Akito tonearm
(I haven't had a chance to try the Ittok.  Anyways, I'd rather get
a Lingo before getting one because the Akito really IS a good arm
==> LP12/Akito/Lingo is likely better than LP12/Ittok/Valhalla).
I like the Blue Point.  I'm not really that much into imaging, but
I think the Blue Point has a very 'natural?' sound that isn't 
fatiguing.  Maybe it's because it is a MC (albeit high output).
I've listened to the K9 and K18.  I find them very articulate but
bordering on annoying in terms of 'brightness?' (something I've
noticed about MM cartridges).  Then again, I used to own 2 Nagaoka
MP-50 cartridges (and I liked them) and people seem to dislike the MP-50
(almost a 'thin?'-sounding cartridge).
Newsgroups: rec.audio.high-end
From: hera!gfl@uunet.UU.NET (27223-lenahan)
Subject: Re: Sumiko Blue Point comments
Summary: bright, nothing special
Originator: tjk@csd4.csd.uwm.edu
Keywords: overrated
Organization: Bellcore, Livingston, NJ
Date: Tue, 14 Apr 1992 13:06:02 GMT
  (5.65c/IDA-1.4.4 for rec-audio-high-end@uunet.uu.net); Mon, 13 Apr 1992 10: 05:10 -0400

(Lasse Ohlsson , xtrT , x1129) writes:
> Hi everyone
> 
>   Anyone have any comments on this experiment? Is the Sumiko really this
>   overrated?  Could the fact that it is designed for P-mount (as some cheap
>   turntables have) have any effect? Is this a common problem with high
>   output Moving Coil cartidges?

I've heard the Blue point once, on  SOTA, factory mounted.
It was thin, bright, and unimpressive.  Not BAD, mind you,
but nothing I'd chose to own.  I had it loaded both 47K/300 pf
and 100 ohms / 300 pf (as if it matters in the latter config).

The I heard the Audio technica OC-9.  That's more like it!
Warm, tracks well, open.  So I bought one.

The AT OC-9 lists for $400, but can proabably be had for less.

> Ps. If my English seems poor, I've got an excuse. I'm a Swede. ;)
>
Actually, I think its very good, Lasse.

Grant
From: bcsaic!trident!testbed@cs.washington.edu
Newsgroups: rec.audio.high-end
Subject: MC 60 tubes
Date: 16 Apr 92 14:04:27 GMT
Organization: Boeing Air ASW Program.
Originator: tjk@csd4.csd.uwm.edu
Return-Path: <bcsaic!news>


Hi,

  I am posting this for a friend, he has two vintage McIntosh 60 monoblock 
  tube amps.  They seem to be slightly different, one I believe was built 
  about 1956, the other maybe 1959?  The amps seem to work fine, but I have 
  a few questions :

  1. Are KT88 and 6550 tubes interchangeable?  More importantly can you put
     a KT88 in a socket marked 6550? What are the differences?
  2. Are 5U4GB and 5U4GA tubes interchangeable?
  3. Are 12BH7 and 12BH7A tubes interchangeable? 
  4. What's a good mail order source for tubes?
  5. Anybody have any history/info on this line line of amp?

                                     thanks in advance,
                                                  Phil

  You can reply to: testbed@asw.ds.boeing.com 
Newsgroups: rec.audio.high-end
From: soucie@bnr.ca (John Soucie)
Subject: Re: The High-End
Originator: tjk@csd4.csd.uwm.edu
Reply-To: soucie@bnr.ca (John Soucie)
Organization: Bell Northern Research, Ottawa
Date: Thu, 16 Apr 1992 14:05:03 GMT


 I too am interested in mods for the Dynaco ST70. I have not been reading usenet
for long but would be interested in any info on these mods that may have
appeared in this newsgroup. Is there a mechanism for retreiving such
information or has someone perhaps collected all the relevent articles in a
file they could mail to me.
 I am actually searching for a Dynaco ST70 or MKIII tube amp to buy. If anyone
has one they would like to part with I would be interested. What is the going
rate for used ones(ST70 & MKIII).

 Also where can I get a set of schematics for these amps. If anybody has a set
perhaps I could get you to send me a photocopy of them.


Thanks in advance;
John Soucie
--
The opinions expressed here are the                 John Soucie
opinions of the author and in no way                soucie@bnr.ca
reflect the opinions of Bell Northern
Research.
From: klein@napali.Eng.Sun.COM (Mike Klein)
Newsgroups: rec.audio
Subject: Re: Imped. Matching w/ Resistors?!
Date: 7 Apr 92 23:44:17 GMT
Reply-To: klein@napali.Eng.Sun.COM
Organization: Sun Microsystems, Mountain View, CA
NNTP-Posting-Host: napali

In article 25549@ux1.cso.uiuc.edu, berger@atropa (Mike Berger) writes:
  >I have a pair of Infinity Reference-3s that I am driving with a Yamaha AV-66
  >Integrated amp.  It is rated at 100W, but has an automatic cutout that shuts it
  >down at volumes that I consider much quieter than a 100W amp should deliver,
  >and before any distortion is apparent.  The speakers are nominally 6 ohms.  I
  >just bought some high-power resistors and put 2 ohms in series with each
  >speaker.  The result seems to be extended frequency response, especially on the
  >low end, and greater volume output before it shuts down.  Can anyone explain
  >why this worked, other than "the magic of impedance-matching"?  Could more
  >resistance enhance this effect, or should I just experiment?

Without knowing any more about the situation, I would guess this:

	- by adding a series resistor, you have increased the system Q of
		the woofers, thereby adding a peak in the bass response
		(but not extending it)
	- your speakers have a very low impedance at some low frequency that
		the amp senses and shuts off
	- assuming the cutoff is a current sense circuit, the max current
		delivered to the speakers does not change with the
		series resistor.  However the overall output of the
		speakers may be higher because of other drivers
		reacting to the series R like the woofer (additional
		response peaks due to higher Q).

There are no impedance matchings in this case.  There is no
transmission line environment unless you are running about a thousand
feet of speaker wire (100kHz, 1/4 wavelength ~= 1200 feet).

If the above is true, I would recommend getting a heavier-duty amp.  The
speakers probably sound good (I am not familiar with them); if you like
them the amp is the thing to replace.
---

Mike Klein		{wherever}!sun!klein || mike.klein@Eng.Sun.COM
Sun Microsystems, Inc.	Mountain View, CA
From: kurts@hpnmdla.sr.hp.com (Kurt Strain)
Newsgroups: rec.audio
Subject: Re: Blind Listening
Date: 16 Apr 92 15:24:42 GMT
Organization: Milky Way Galaxy

In rec.audio, chrisc@gold.gvg.tek.com (Chris Christensen) writes:

>   This is total bull!  The musicians ARE very concerned with room sound
>   and the quality of Timbre is their LIFE.  Where do you get off with
>   these statements!  To state that a musician in an orchestra isn't a
>   listener is correct, after all they are only creating the gawd damn
>   shit!.

Oh, so from now on in order to tell how good a new jet is, we'll go to
the real experts, the assemblers, not the test pilot.
Newsgroups: rec.audio
Subject: Re: Portable CD Player < $200???
From: krschimm@wsuhub.uc.twsu.edu
Date: 14 Apr 92 21:41:22 CST
Organization: Wichita State University, Wichita, Ks

In article <1992Apr12.201200.12056@leland.Stanford.EDU>, image@leland.Stanford.EDU (John B. Mooney) writes:
>
> I'm looking into purchasing a portable cd player for less than $200.  Several
> people in this group have recommended the Panasonic SLNP-1a for around
> $125.  The consensus appears to be that this has the best sound as far as
> portables are concerned.  However, is this unit well built (rugged enough for
> hiking, camping etc.)?  Does it have rechargable Ni-Cads?  Other units I should
> consider?  Any suggestions will be greatly appreciated.
>
> Thanks in advance,
>    -- John, image@leland.stanford.edu
>

I have the Technics slpc-300(the panasonics big brother)
it comes with ear buds, 2 700ma nicads(as apposed to 500ma common kind)
ac/recharger carring case and best of all is infarred remote controled up
to 15 m away!, Has 8x oversampling and is build like all
Technics equipment (great by the way).

Karl Schimmel
From: u-magpie@mcl.mcl.ucsb.edu (Mark Dadgar -NeXT CC)
Newsgroups: rec.audio
Subject: Re: Upright Turntable?
Date: 12 Apr 92 04:37:44 GMT

In <92102.223104ASOLOMO@auvm.american.edu> ASOLOMO@auvm.american.edu (ari solomon) writes:


>   Does anybody else remember an upright turntable, made by Mitsubishi, from
> the early 1980's? This was a *beautiful* table, with a unique design: It was
> as if you took a turntable and pulled it forward so that it sat vertically on
> it's front end -- and then played records on it, holding them in place with
> a big clamp! Unfortunately, its acoustic properties were less impressive --
> subject to buzzes and resonances for one thing.   If anyone has memories of
> this unit I'd like to hear about them -- and I'd be interested in buying one
> at the right price, used.     E-MAIL to ASOLOMO@AUVM    -- Thanks

I had a similar unit made by Optonica (aka Sharp).  Truly a nifty design, with
a needle for each side of the record (no need to flip the record over).  Other
cool features included continuous play and song search (like a tape deck).

It's fatal flaw was a two-parter: a plastic case, and an insufficiant clamping
mechanism.  The plastic case reasonated like crazy, and bass rumble was
always a problem.  The thing had more "oh wow!" appeal for the design than
for the sound.  In fact, I could get the thing to skip by turning up the
volume and playing "Hearts" from Yes' _90125_.  Every time the bass drum
came in, the needle would jump.

It was a neat idea that didn't quite work right.


- Mark
--
          Mark Dadgar         |        A pretty sight it seemed to be
  UCSB NeXT Campus Consultant |          An avenue of eternal peace
   u-magpie@mcl.mcl.ucsb.edu  | But he said "What is here can soon burn down...
       Bill & Opus - '92      |         I'm the King of Sunset Town"
From: rsd@sei.cmu.edu (Richard D'Ippolito)
Newsgroups: rec.audio
Subject: Re: Life time of a speaker
Date: 15 Apr 92 15:47:02 GMT
Distribution: usa
Organization: Software Engineering Institute

In article <1992Apr8.212343.13281@umiami.ir.miami.edu> 
jdeitch@umiami.ir.miami.edu writes:

> I had a pair of old (like 15 years, maybe) KLH speakers that I shredded with
> my synthesizer, by accident (of course).  The cones literally fell apart.  A
> certain example of foam rot if I've ever seen one.
 
> Those KLHs lasted, though, about fifteen years before I killed 'em with a
> digital synth with 22 bit dacs and one hell of a fat patch !

I have a 25 year old pair that's still going strong -- surround is still pliable and intact.  I replaced some of the crossover capacitors about seven years ago.  My parent's model sixes are 34!



> Gene Roddenberry, Isaac Asimov, Jim Henson, Dr Seuss, Mel Blanc ... Sigh...

One, two, and four I won't miss...


Rich
Newsgroups: rec.audio
From: ws@cacs.usl.edu (Werasak Suengtaworn)
Subject: A question for TUBE-lovers
Organization: The Center for Advanced Computer Studies
Date: Thu, 9 Apr 1992 06:17:26 GMT

Hi folks, what are the best (sonically) brand names of 12AX7 and 6DJ8, 
or substitute ones, you ever heard? 

werasak
From: twc@Saigon.COM (Ted Chan)
Newsgroups: rec.audio
Subject: Re: M&K Satellite/Sub Info wanted
Date: 10 Apr 92 02:05:31 GMT
Organization: Station Zebra Public Access UNIX(tm), Sunnyvale CA  (408)739-1520

From article <1992Apr7.233855.743@vlsisj.uucp>, by harish@vlsisj.uucp (Harish Balan):
> 
> 	I am looking to buy a sat/sub combination and a friend
> recommended M&K to me.   I have several questions on this and would
> really appreciate any responses to any/all of the queries...
> 
> 	1.  Could I hook up any M&K subwoofer to a pair of M&K 
> satellites??  I know that in the case of the Bose AM5-II, you cant
> do this.

Yes.  Though some of the cheap ones may not have variable crossover...
The M&K subs have internal amps, FYI.
 
> 	2.  I know the model of satellites I want but unfortunately
> I dont know the model number (only know what it looks like) and I cant
> find a local dealer who stocks M&K.  Could someone help me out with the
> model number of the M&K satellites that look like...
> 
> 			----
>                        |    |
> 		       |    |
> 		      --    --
> 		     |        |   <----- satellite spkrs. (without a stand)
> 		     |        |
> 		     |        |
>                      |        |
> 	             ----------
>             
> 	    I was told that M&K stopped making the above satellites and
> they had only one model which looked like what I've drawn above.

A few months ago, Whole Earth Access in San Mateo had these in stock.
These were top-of-the-line.  Good imaging, fussy about vertical location
of your head (assuming your ears are attached to your head).
 
> 	3.  What difference is there in sound quality if my amp. does not
> have a subwoofer input?  I will be connecting the speakers the traditional
> way -- satellites -> sub. -> amplifier.

The subs typically have an amp and a cross over (might just be a low pass
filter).  The satellites roll off at around 70-90 hz anyway.

> 	4.  Any good mail order places which deal in M&K's?  

Check the classifieds in Stereo Review.  I'd call all the Whole Earth
Access stores in driving distance first though...

--twc@legal.uucp