HDTenEightyP/NetNews huggingface dataset:
From: moskowit@panix.com (Len Moskowitz)
Newsgroups: rec.audio
Subject: Re: Active Crossovers
Date: 6 Jan 93 21:42:02 GMT
Distribution: na
Organization: Panix Public Access Internet & Unix, NYC

In article <1993Jan4.033157.26862@magnus.acs.ohio-state.edu>
carlwu@magnus.acs.ohio-state.edu (Carleton Wu) writes:

>Does anyone know of any reasonably priced active crossover that is of high 
>quality?  

Marchand Electronics advertises in Speaker Builder.  They make a very
nice quality crossover at very reasonable prices (I bought two 24
dB/octave L-R kits for under $60).


-- 
Len Moskowitz
moskowit@panix.com
From: keith@hpfcso.FC.HP.COM (John Keith)
Date: Mon, 4 Jan 1993 13:16:24 GMT
Subject: Wanted: Bose 402's and controller
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: rec.audio

Wanted: Used pair of Bose 402 speakers with controller or something equivalent
        to the Bose. Small size and good power handling capbility are the
        primary requirements along with less than list price :-) As an 
	alternative to used can someone point me to a mailorder distributor
	that would have a good price?

John Keith keith@fc.hp.com
Newsgroups: rec.audio
Subject: Sennheiser Corp
From: GCLATWORTHY@PBS.ORG (Glenn Clatworthy)
Date: 7 Jan 93 17:38:45 EST
Followup-To: rec.audio
Distribution: world
Organization: Public Broadcasting Service

Does anyone have current contact information for the Sennheiser Corp? 
Thanks!

********************************************************************
 Glenn Clatworthy                                                          
   Public Broadcasting Service
 (703) 739-5248                                                            
   PBS Program Data & Analysis
 GCLATWORTHY@PBS.ORG
********************************************************************
From: lstowell@pyrnova.mis.pyramid.com (Lon Stowell)
Newsgroups: rec.audio
Subject: Re: How can different digital cables sound different?
Date: 7 Jan 93 20:59:49 GMT
Reply-To: lstowell@pyrnova.pyramid.com.pyramid.com (Lon Stowell)
Distribution: world
Organization: Pyramid Technology Corporation

In article <shetline-070193101041@128.89.19.85> shetline@bbn.com (Kerry Shetline) writes:
>
>If we are careful about defining 'jitter' as a time-domain problem (I get
>the feeling some people are confusing it with noise affecting signal
>level),
   
     That would appear to be the case...to most commo techies,
     jitter is alterations in timing of the bit cells or clock...or
     alterations in timing of the relationship between the two.

>
>It seems to me that the best approach to this jitter problem is a one-piece
>CD-player with a good quality DAC and analog components. Either that, or if
>clock-recovery is so difficult to do well, a new interface standard that
>provides a separate clock signal. I'll ask the engineers: Is it really that
>difficult to do clock recovery well? Or is it just bad design? Is there
>much of a price difference?
>
    o  In some published tests, the frequency response of CD players
       was BETTER using their internal DAC than using a high priced
       external D/A.  However, I believe the tester noted that a
       change of cables corrected the problem.  I'll leave it to the
       CD engineers to explain why loss of high frequency response
       is a common artifact of poorly designed and connected
       cabling.

    o  Decent, accurate clock recovery is not at all difficult to do
       well.  It's done every day in the LAN/WAN environments.  With
       the exception of the teething problems of the TMS 38053 its
       quite reliable.  And in the volumes of home audio chips, it
       would be extremely easy to produce inexpensive chips which
       use the techniques of Ethernet, Token Ring, or FDDI...its
       just that to my knowledge it ain't been done yet.  

    o  No, you don't need a separate clock.  I'm not even convinced
       you really need LAN quality recovery....but the same problems
       the telco and LAN engineers have struggled with have simple
       solutions...as soon as you quit pretending there is no
       problem.   And audio is even less forgiving of errors than
       computers...   


>-Kerry


Newsgroups: rec.audio
From: kega@nobeltech.se (Kent Gabrin)
Subject: Re: FOR SALE: PURIST DIGITAL CABLE
Organization: NobelTech AB
Distribution: rec
Date: Tue, 5 Jan 1993 10:13:01 GMT

In article <1993Jan4.221820.19518@nynexst.com> rsilvers@nynexst.com (Robert Silvers) writes:
>In article <1993Jan4.203144.27955@banana.fedex.com> mike@banana.fedex.com (Mike Bearden) writes:
>>
>>      FOR SALE: Purist Audio Design Digital Cable -----    $165
>>      List price: $350
>>      1 Meter
>>      New style with mesh
>>      price of $165 includes shipping
>>      RCA/RCA connections
>
>	Are you crazy?  Is this an RCA cable designed for coax digital
>connections?  You can get a PAIR of Monster cables, 1 meter, for $20 to
>$30.  Sorry, I have never tried to shoot down someones "for sale" ad
>before, but this one is hard to believe.  (We are talking about digital
>signals here, I mean, a computer is less tolerant of bit errors than a
>DAC, and people don't sell this hocus-pocus stuff for computers).
>
>						--Rob.

  Why buy? I built some cables use plain 75 ohms TV antenna cables and
solder it to ordinary metal RCA PHONE plugs. I compared the sound
against an optical JVC cable connected between my Philips CD-960 and
my DAT JVC XD-Z505 BK. (Both equipment has both optical and koaxial
input/output.) My 36 years old ears couldn't hear any difference.
/Kent

Kent Gabrin   NobelTech Systems    ! My thinking is not as great as
S-175 88 Jaerfaella      Sweden    ! Oliver Berendinus Bumble /Will Try
KEGA@nobeltech.se ! Waiting for DAB to arrive


Newsgroups: rec.audio
From: garyp@rmtc.paramax.com (Gary Palangian [RMTC/ISP])
Subject: Mango Juice Treatment
Keywords: CD, Mango Juice, Dom Perignon, Mount Everest, Full Moon 
Organization: Paramax Systems
Date: Thu, 7 Jan 1993 18:36:37 GMT

|... your CDs would sound better if you bathed them in
|mango juice, rinsed them with Dom Perignon, rinsed them again with
|distilled water, and then hiked to the top of Mount Everest to expose
|them to the light of a full moon[.]

This procedure is quite effective.  Although several of friends
disagree, I have discovered that the new Cordo Negro Extra Dry works
just as well as the Dom Perignon, and saves about $110 per CD.  One
friend has mentioned that she finds the best sound reproduction
results from drinking the champagne prior to playing the CD.  We
are currently conducting double blind tests to ascertain the validity
of this claim.


Party On...

Gary P.
Newsgroups: rec.audio
Subject: Re: Sony CDP-C725 and C89ES
From: erkamp@JANUS.ARC.AB.CA (Bob Erkamp)
Date: 11 Jan 93 12:04:04 MDT
Reply-To: erkamp@JANUS.ARC.AB.CA
Organization: Alberta Research Council

In article <1iohqiINN68g@usenet.INS.CWRU.Edu>, aq511@cleveland.Freenet.Edu (Jet-Sun Lin) writes:
>
>I am in the market for a new Compact Disc player, and I would like to upgrade
>from my current machine to a fairly "high-end" model.
>
>I would like to spend from $400 to $800 or so.  I currently have a one-
>disc model, and I would like to upgrade to a carousel.
>
>I have done a little shopping, and I found the Sony CDP-C725 and the
>Sony C89ES to be pretty cool machines that were both within my price range.
>
>I have a general question and some specific questions about these models:
>First, I would like to know any general impressions that anyone out
>there might have (especially if you own one of these models).
>Also, I would like to know how well the Digital Signal Processing
>works.  And I would like to know the differences between these two
>models.  As far as I could tell, they had the same features except for
>some very minor differences and the fact that the ES is a limited
>production series.  Why the $300 price difference?
>

Well my girlfriend has the CDP-725 (I have a CDP-500). This is a nice machine 
and I convinced her to buy it. I personally don't feel that the DSP function 
belongs on a CD player but it does work. The nicest feature of this machine 
(IMHO) is the Custom File option. This allows you to store your programs as well
as a 10 character MEMO with each disk. This means you only have to program the 
disk once (now if only you could use this in conjuction with SHUFFLE). I don't
recall what the C89ES is like but from experience the ES line tends to have 
finer tolerances on their components also you will find that the ES probably 
has quieter mechanical operations than the non-ES model. It's also more likely
to weigh more (heavier chassis/power supply?). Now whether this is worth the
difference in price I don't know.

Bob
Newsgroups: rec.audio
From: joe@avs.com (Joe Peterson)
Subject: Re: MiniDiscs -- What Are They?
Organization: Advanced Visual Systems Inc.
X-Newsreader: TIN [version 1.1 PL8]
Date: Wed, 6 Jan 1993 16:59:48 GMT

Scott Dorsey (kludge@grissom.larc.nasa.gov) wrote:
: The MD machine is awful.  It's really bad.  It's got a noise floor that
: pumps, even.  You can do better with a good cassette deck.  The numbers on
: it aren't even any good: the high frequency response is flat at very high
: levels, but when it drops down 1/2 MSB, everything above 10 KHz goes away.
: Very strange.  I think I'll pass on this one.
: --scott

: I'm still hanging on to my DAT machine in the meantime.

Well, perhaps you are expecting too much from MD technology.  If you are
listening with an extreamly critical ear, and throwing it on a test bench,
you are bound to be disappointed!  I own one of these recorders, and I find
it really cool.  For it's purposes, it sounds great (IMHO).  I have not
sensed any loss of high frequency response, but then again I have not
looked at the numbers.  MD, after all, uses perceptual algorithms to
decrease the data.  I would not be surprized to see strange things (i.e.
different from CD and DAT) on the test bench.  What counts to me is
that it is very pleasing to listen to - A LOT better than cassette (again
IMHO!).

I don't have a DAT, but I'm sure it sounds and performs great on your test
bench.  Unfortunately, it did not make it for consumers.  I do use DAT tape,
but for computers, not music - now there's a place that DAT has caught on!
Being a perfectionist, I love the idea of lossless recording and great
sound, but I am satisfied with MD for it's intended purpose, and I think
it sounds pretty good plugged into my home stereo as well.

							Joe
Newsgroups: rec.audio
From: strong@tc.fluke.COM (Norm Strong)
Subject: Re: Bose Speakers
Organization: John Fluke Mfg. Co., Inc., Everett, WA
Date: Mon, 11 Jan 1993 19:30:57 GMT

In article <726650872.AA00128@ship.wimsey.bc.ca> Matt.Ion@p106.f7040.n153.z1.ship.wimsey.bc.ca (Matt Ion) writes:
} MGS> V & VI are state of the art!  The drawback to Bose in all truthfulness
}is
} MGS> a lack of "powerfull, deep" bass.  Oh yes, they have power alright. 
}Sales
} MGS> reps plug these speakers directly into house current and the speakers
}are
} MGS> just as good as they did before the abuse.  No other speaker owner or
} MGS> manufacture would likely try this one.
}
}I hear JBL burns in its large sub drivers by hanging them in an anechoic
}chamber, hooking them up to 120VAC/60Hz and running them for 24 hours. V^2/R
}or 120^2/8 gives you about 1800W power dissipation, CONSTANT.

The latter is probably apochryphal; when I was young it was Altec that
supposedly did this (and the drivers were 16 ohms.)

As for the Bose, how do they achieve their power limit?  Anyone in
rec.audio really know?  My guess is a PTC thermistor.  It's a cinch that
the bare drivers can't dissipate that much heat. 

-- 

Norm Strong  (strong@tc.fluke.com)
2528 31st S.   Seattle WA 98144   USA
From: henrik@itekiris.kjemi.unit.no (Henrik Gudbrandsen)
Newsgroups: rec.audio
Subject: Compound/isobaric-system?
Date: 6 Jan 93 08:18:01 GMT
Organization: SINTEF

Hallo world!

I'm planning to build a loudspeaker set (my second (this is fun!)). Last 
year a bought CALSOD v1.2 and I find it very useful, but it lacks modules 
for compound (sometimes called isobaric) system.

My question is: How do I calculate a compund speaker (what happens to the 
thiele-small parameters)?.

With this a information I can use the closed box modules to describe the 
speaker in the program (and for hand calculation).

Are there any public domaine/shareware products of the same quality as 
CALSOD?


Henrik Gudbrandsen
henrik@itekiris.kjemi.unit.no
From: kirk@hpcc01.corp.hp.com (Kirk Lindstrom)
Date: Tue, 5 Jan 1993 18:52:43 GMT
Subject: Re: Subs : M&K, Velodyne, or Museteax?
Organization: Shredding the water of SF Bay, HP-OCD
Newsgroups: rec.audio

>Hi, I'm looking forsome help in choosing a good, versatile, powered
>subwoofer. The price range is in between $1000-$1500. Some models
>I've looked at so far are:
>                            1. Velodyne F-1200  ~100 watts    $1095
>                            2. Museatex(sp?) sw-12  ~250 watts $1099
>                            3. M&K (various models above $100
>
>I haven't done a lot of listening. WhatI need to know is :
>
>                  1. How much power is enough? (everyone says Velodyne's
>                                                are underpowered)
>
----------
You are buying speakers so you have to let your ears be the final judge.
You didn't say what you wanted to listen to with them or what other
electronics and speakers you'd be running them with.

MY tastes:  Jazz, classical and some pipe organ stuff plus movies with
7-channel DSP surround, the F-1200's were too weak.  The F-1500s sounded
about right Or the ULD-12s.  Since the F-1500 was $1500, I listened to
full-range speakers and decided to get a used pair of a/d/s/ M15s where
I now have 4 10" woofers (2 pr speaker) instead of a single 12 or 15
inch one which is a big help.  Power them with a big amp (Acurus A250)
and I'm very pleased.  Only having a single sub can be a problem with
room nulls which are easier to correct with two big speakers (or subs).
I considered getting two F-1200s for that problem, but a full range
speaker made more sense and was much easier to cross-over, balance, etc
(since a/d/s/ already did it when they designed the speaker as does any
other monitor manufacturer).

I'd only go the sub route if you already have a VERY good pair of speakers
you are happy with and just want to extend below 50 Hz.

Kirk out

Newsgroups: rec.audio
From: cal@gsbux1.uchicago.edu (Cal Lott)
Subject: Re: Upgrade suggestions?
Organization: University of Chicago Computing Organizations
Date: Tue, 12 Jan 1993 02:44:58 GMT

lstowell@pyrnova.mis.pyramid.com (Lon Stowell) writes:

>In article <1imrpbINNf7@umbc4.umbc.edu> marklc@umbc3.umbc.edu (Mr. Mark L. Cohen) writes:
>>I guess I have several options:
>>1) Move the JBL's to the rear channels and buy a real center speaker.
>>2) Get a subwoofer to add to the bass (the Infinities sound fantastic down
>>   to around 40 hz but that's their limit).
>
>    If you have limited budget for toys, you'd likely get more
>    enjoyment out of a subwoofer...particularly if you like Star
>    Wars, Star Trek, Top Gun, or Batman II movies.  

	I agree that a subwoofer would make a big difference in his movies,
Lon, but the decent ones start at around $1000. Some people may consider
that to be a "limited" budget, but I would be willing to bet that most
would not.

	(And if anybody knows of any subwoofers that are comparable in
performance to Velodyne or other quality brands, and are under $1000,
do tell.)

>    May want to do a "neighbor check" first tho.... 

	Agreed. Since he is in the basement of a house, however,
excessive volume is unlikely to be a major difficulty.

>>3) A combination of 1 and 2.

>    But of course...if you have the bucks.

>>4) Any other wacky ideas.

	You might also consider investing in a laserdisc player. If your
TV is *very* old, you probably won't get a great deal of video improvement.
The sound should take a dramatic leap in quality. Low-end laserdisc players
can start at around $400, as well.

							-Cal
--
----------------------------------------------------------------------
Cal Lott          "Oh, I see-- I thought 'no' meant 'spoon'!" --Dan
Email me, baby!   cal@gsbux1.uchicago.edu   cjl1@midway.uchicago.edu
----------------------------------------------------------------------
Newsgroups: rec.audio
From: umhaugh0@ccu.umanitoba.ca (Bruce A. Haugh)
Subject: Re: Headphone Reccomendations
Organization: University of Manitoba, Winnipeg, Canada
Date: Tue, 12 Jan 1993 04:45:32 GMT

In <C0pxwo.MB4@news.cso.uiuc.edu> rg4590@meibm10.cen.uiuc.edu (Ryan Martin Grant) writes:

>Thanks to everyone who posted.  I've already got the headphones now,
>but I relied heavily on the recommendations.  Sony appears to have discontinued
>the MDR-V6, and replaced it with the MDR-V600 which I've heard is heavier
>and doesn't look like it folds up.  I also heard from a questionable source
>that the new ones definitley don't sound as good.  Anyway I went out and found 
>a leftover pair of V6's and like them very much.

>I was sort of pressed for time returning to college, and didn't get to hear the AKG or Senheiser models, but I think given my needs, it sounded like the Sony's
>filled them best.

>Once again, Thanks Everybody!
>- Ryan Grant

I haven't heard the AKG's either but I can tell you that unless your willing
to spend more than $170 the Sennheisers are not the best.  I love their
top models, very nice sound but their lower end just can't cut it.
An interesting comparison I made to the Sennheiser headphones were these
headphone that I got from Wardair (the airline company while they were
still in business).  I don't know who made the headphones since they just
had the Wardair label on them but they sounded better than some around-$100-
or-so Sennheisers.  They were nowhere's near as good as the $300 Sennheisers
(go figure) but I just "wrote" them off as some generic headphones that
sounded good.  Guess I should take a look at some AKG's?

Bruce


Newsgroups: rec.audio
From: tat@junior.ca.boeing.com (Tim Tallar)
Subject: AV Receiver Recommendations
Keywords: Help,Knowledge,AV Buffs
Organization: BoGART Graphics Development
Distribution: usa
Date: Wed, 13 Jan 1993 00:29:16 GMT


-- 
Tim Tallar  -  Seattle, WA                            (206) 544-8113 (wk)
tat@voodoo.ca.boeing.com                       ..!uunet!bcstec!voodoo!tat
From: yuehan@stein.u.washington.edu (Jonathan Mesler)
Newsgroups: rec.audio
Subject: testing
Date: 4 Jan 1993 07:02:06 GMT
Organization: University of Washington
NNTP-Posting-Host: stein.u.washington.edu
Summary: testing
Keywords: don't answer this
From: kuusama@kaarne.cs.tut.fi (Kuusama Juha,,,,)
Newsgroups: rec.audio
Subject: Re: How can different digital cables sound different?
Date: 12 Jan 1993 09:15:41 GMT
Organization: Technical University of Tampere, Dep. of Computer Science ,Finland 
Distribution: world
Reply-To: kuusama@kaarne.cs.tut.fi
NNTP-Posting-Host: kaarne.cs.tut.fi
Originator: kuusama@kaarne.cs.tut.fi

From article <24593@alice.att.com>, by andrew@alice.att.com (Andrew Hume):
...
> Lets pretend you are
> designing an AES/EBU decoder (the receiver on the DAC side of the
> digital link). how would you design the PLL, and how much jitter
> does it have? keep in mind you have to cope with 32kHz, 44.1kHz
> and 48kHz, and you have to capture within the 4 bit preamble.
> (i'm not trying to embarress you; it would be instructive to see
> what the answer is!)
> 
> 		andrew hume

You don't have to stabilize frame by frame basis. Basically (assuming
you are designing a system with no compromises; not too often found in
real life) you start with high tolerance PLL to lock reasonably fast;
within one second is fine. Then you switch in as tight time constants
as your system needs to have no audible side effects. If you then lose
sync, start again.

Difficult points:
	- not to lose sync when changing time constants
	- what to do when source tolerance is not good enough
	- know how tight PLL you need
	- keep noise off the PLL

When you try it, you soon realize why some/most commercial units do
compromise here and there...
--
Juha
From: eb15+@andrew.cmu.edu (Edward D. Berger)
Newsgroups: rec.audio
Subject: Eumig Parts?? - Cassette Deck FL1000
Date: 6 Jan 93 06:09:47 GMT
Article-I.D.: andrew.QfGkF=C00WB_E8FUUt
Organization: Pittsburgh Supercomputing Center, Carnegie Mellon, Pittsburgh, PA

I'm looking for a source of mechanical parts for an Eumig FL1000 cassette
deck.  The capstan bearing appears to be worn out.  The heads are in good
shape, so it would otherwise be worth reparing the machine.  I know the
company stopped producing consumer audio products, but I think they may
still exist in some capacity, or have sold their inventory of parts, etc.
to a third party.

Any information would be helpful.
Thanks in Advance.

-Ed Berger
eb15@andrew.cmu.edu
From: kirk@hpcc01.corp.hp.com (Kirk Lindstrom)
Newsgroups: rec.audio
Subject: Re: BMG 800 number?
Date: 4 Jan 93 21:21:46 GMT
Organization: Shredding the water of SF Bay, HP-OCD

The positive response option is still available, as far as I know
(I've been on it for more than a year), but only after you've
fulfilled your original membership agreement.  They may refuse you the
first few times you ask, so keep trying every month.
-- 
Sam Daniel          *   UUCP (Smart):  daniel@netcom.com
----------

I got this from BMG on the first try.  Wrote a simple "paste-up" note
saying I like to buy their CDs when they go on sale, but NEVER will buy one
at full price since it is more expensive than getting it locally. Asked
for the "positive response option" and they granted it.

Kirk out
Newsgroups: rec.audio
From: kim@cs.iastate.edu (youngtae kim )
Subject: Forte amp recommendations
Summary: need recommendations about Forte Amps
Keywords: forte amp
Organization: Iowa State University, Ames IA
Date: Fri, 8 Jan 1993 23:10:30 GMT

I am trying to buy Forte 40 (or 44) pre-amp and Forte 5 power-amp.
Can somebody give me recommendations?

Thanks in advance.
Newsgroups: rec.audio
From: joe@avs.com (Joe Peterson)
Subject: Re: More Sony MZ-1 weirdness
Organization: Advanced Visual Systems Inc.
X-Newsreader: TIN [version 1.1 PL8]
Date: Sun, 10 Jan 1993 14:01:07 GMT

Daniel MacKay (daniel@nstn.ns.ca) wrote:
: I think there are some serious software problems with the machine.  Mine
: does the same thing during fast forward once in a blue moon.  Hitting the
: <pause> button twice fixes mine.  What it sounds like on mine is two
: sections of music, time-sliced and played at half-speed at the same time.
: Not particularly loud.

: Other software glitches (from home recordings only - I don't have any
: prerecorded discs yet)
:  - when you use the "resume" mode to continue playing from where you
:    switched off the power, the screen displays the title of the first
:    track, not the correct track, when you hit <play> again.
:  - After you've spliced two tracks together, rewinding and fast forwarding
:    back and forth over the splice will do some very unusual things.
:  - Once, only once, the recorder tacked about 1/10 of a second of some
:    other piece of music -- it was a chord I recognized -- onto the
:    beginning of the first track.  I could edit it out -- divide the track
:    after the chord and then erase the new (very short) track -- but it was
:    a little bizarre.

We should start keeping a "bug list" (maybe Sony will fix these annoyances
if there are enough!).  I, too, think the machine is cool, except for
the bugs, which really "bug" me!  One new one (and this is reproducable!)
is the following:

Insert the Sony Music Sampler (came with the unit).  Play track 7.  Let it
play through to track 8.  Notice that the stereo separation is strange
(severe?) and the vocals (Harry Connick Jr.) are all the way over to the
right, but sometimes wander toward the center.  Now hit the ">>" button
quickly to perturn the position.  Now notice that the vocals are in the
center and the tonal quality seems normal.  It seem to have something to
do with transitioning from track 7 to 8!  And this is on Sony's demo disk!!

						Joe