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BOSTON AUDIO SOCIETY
Meeting Notice for September 2017
Date: Sunday, September
17, 2017, 4:00 PM - NOTE TIME !
Place: NOTE
PLACE !
Natural Sound, Inc.,
401 Worcester Rd,
Framingham, MA 01701
(508) 879-3556
Featured: Jim Lackey, President
The September meeting of
the society will be in Framingham MA. It is the
site of one of the area’s longest surviving
audio salons (42-years), and it is staffed by
competent audio-video sales representatives. The
lecture topics will include a presentation of
their 1-million dollar, high-end inventory, and
delivering quality audio in the wake of the surging
sales of Mp3 and earbuds.
Natural Sound’s early
years consisted of co-owners Jim Lackey and Kevin
Voeks. Kevin Voeks is now the main speaker engineer
for all of the Revel products, and Jim is the
sole owner of Natural Sound. From the beginning,
Natural Sound wanted to represent the best equipment
available at every price point. Over the years,
other key criteria emerged such as long-term reliability
and excellent service. In addition, unlike the
“big-box” stores, the staff can demonstrate
equipment and talk about the merits of a product.
There will be refreshments
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| Driving
Directions
Take Rt. 9W from Rt. 128.
Travel about 13-miles to 401 Worcester Rd, Framingham,
MA 01701. Travel time from Boston, 33 min. It
you pass Cochituate Rd, you have gone too far.
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The
2017 New York AES Show (Oct 18-21) has its own page,
here:
www.aesshow.com
Also, there's a very useful list of exhibitors HERE
— Barry
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| BAS
MICROPHONE CLINIC REPORT ! |
| In September 2009
the B A S held a microphone clinic, testing 37 different
microphone models. The ambitious nature of the clinic
effort, the extent of data collection, the number
of individuals involved in microphone testing and
in writing various sections of the report, and the
complexity in determining how to construct the clinic
report and make it available to members resulted
it not being published until now. The dataset is
extensive.
Representative samples were
included in the abbreviated report in "The
B A S Speaker"
(Fall 2015; v37n3)
Go to the MICROPHONE
CLINIC PAGE for more...
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The
BAS Message
Sept 2017
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1. By special
arrangement Acoustic Technologies single
driver loudspeakers are available to BAS
members for $400 a pair, shipping included.
They gave a presentation at the BAS in 2010.
www.acoustictechnologiesllc.com
2. I saw
an ad for the Nordost QKORE ground unit
in Stereophile. It claims to be the most
effective grounding solution in the industry.
Their patented Mono-Filament technology
with purpose-built Low-Voltage Attractor
Plates (LVAPs) constructed with a proprietary
metal alloy and a passive electronic circuit,
draws stray high frequency noise and voltage-generated
magnetic fields to a manufactured earth
point, leaving a clean reference behind.
It will drop your system's noise floor,
increase harmonic accuracy and clarity,
and elevate the overall musicality. [It
is not intended to be connected to earth
ground]
A reviewer says it gives
“tighter ...bass...a more accurate
sense of rhythmic beat.” Starting at
$2400.
Many years ago Mitch
Cotter suggested mounting binding posts
on a heavy copper strip for grounding purposes.
By forcing the equipment chassis to a common
low impedance connection it eliminated voltage
drops due to circulating currents in the
cable shields. Since in consumer equipment
the signal low is the same as the ground
return, that can reduce noise . Beyond that
the QKORE seems to be voodoo science. In
something like this there is always grain
of truth. The rest is fantasy.
(All Electronics is
selling “100 Amp Buss Bar on insulated
base” for $6.95. Might be a good start.)
email me here
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| Below,
other meetings and notices which may be of interest
to BAS members |
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When collecting
and plotting "noisy" data it is
often useful to have Microsoft Excel plot
a Trend Line through it. If that data
is to be used for further work, it may be
necessary to have an X-Y table of the Trend
Line. That is not easy to get and this paper
will show how to do it.
Joseph DeMarinis
has a new article here: Extracting
Numerical Data from an Excel Trend Line
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Foster's
Test Bench !
by Alvin Foster ! Click
the logo: —> |
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The rapidly-becoming-famous
BAS Headphone Test Article is now
available in the BASS VOLUME 25, ISSUE
4, on Page 17, available HERE
PDF 3mb |
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Visit
our PODCAST PAGE
for:
The LIVE video podcast of our meetings,
Archived video of past meetings (only one
so far!),
and Audio Podcast interviews by Alvin Foster |
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There is a supplemental and
further explanation addendum paper to the E. Brad
Meyer / David Moran paper published in the September,
2007 issue of the AES Journal. That
page, which documents the experimental protocol
and audio systems/source material is here:
www.bostonaudiosociety.org/explanation.htm
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| There is
a Power Point Presentation of the lecture given
by Dr. Barry Blesser at the March 2007 Meeting.
The Meeting page synopsis is HERE;
the Power Point Presentation (as a web page) is
HERE |
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Some earlier
BASS issues, previously available only
directly by mail, are now available online, on
the BAS SPEAKER page, HERE
Show your
appreciation for the immense amount of dedicated
work that went into both the original writing,
gathering, editing and printing, PLUS the
more recent scanning and conversion to PDF format,
by joining the Society, HERE
!
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A
L L O F F S I T E L I N K S O
P E N I N T O A N E W
W I N D O W
- AND FOR CONVENIENCE
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The Boston Audio Society needs
individuals who will write summaries of BAS meetings into *.pages,
*.doc, or *.txt files. We usually have audio recordings of the meetings.
We pay for your work. Ask about our bonus program for meeting-writers!
Contact David B. Hadaway (603-899-5121; dbsys22@att.biz).
Does anyone have a schematic (or any other
info!) for any Dunlop-Clarke Dreadnaught amplifier? Email Barry
at webmaster@bostonaudiosociety.org
For sale: Audio Precision System
1 audio test system. SYS-322A, s/n SYS1-31968, IMD, BUR, W&F
options, A-weighting filter, PCI interface card, rackmounts; asking
$5000. Contact Mark Chambers machambers@charter.net
For sale: Several CD storage
racks, some made by Bostonwood (www.BostonWood.com/cd.html):
Two four-shelf units (25.5"Hx17"Wx5.5"D); One four-shelf
unit (25.5"Hx24"Wx5.5"D); Two three-shelf units (19.5"Hx17"Wx6.5"D);
one home-made three-shelf unit (18"Hx14"Wx6"D). I
have attached a handle and chains to several units, making them
convenient open-top carriers. David J. Weinberg (Maryland; 301-593-3230).
Seeking a two-channel preamplifier
such as an Apt Holman, an early Hafler, or an early NAD. Must work
properly. Fred Ampel (FAmpel@KC.RR.com).
Seeking prereceord Advent cassettes,
especially Russell Sherman Beethoven and Liszt recordings, and Handel's
Messiah performed by the Handel & Haydn Society under Thomas
Dunn. David R. Moran (DRMoran@aol.com).
I am disposing of all my old copies of
the BAS Speaker, which go back to 1978, more or less complete. I
am going to recycle these with waste paper unless somebody wants
them for free. I'll even pay shipping. Doug Pomeroy Audio Restoration
& Mastering Services audiofixer@verizon.net
Discography of Test Records.
I am compiling a list of technical test records from all recording
eras and would like to exchange information in order to confirm,
expand, correct and add entries. Send me your list and/or other
information about test records and I will send you my discography,
which has nearly 200 entries to date. I am interested in commercially
released records, as well as discs intended primarily for in-house
use by audio engineers, broadcasters and for other special applications.
I am generally excluding demonstration discs of the "Super
Stereo bouncing ping-pong ball" type unless they include at
least some tracks of a technical nature, such as frequency response
and tracking tests, etc. Nicholas Starin, Portland Oregon, NTSTestDisc@Gmail.com.
Nashville AES Test CD. (www.AESNashville.org;
click the small round symbol where it says "Click here for
more info:" to download the four-page description and track
list. Use the link on the website under <Products> to send
an email for pricing and availability.) From the website: "Assembled
'by engineers, for engineers' after a survey of the needs of a broad
cross-section of working audio pros, the disc features 71 tracks
of test signals ranging from level calibration tones, noise signals,
third-octave tones, polarity and digital meter calibration pulses,
bandpassed noise and swept sinewaves. Additional tracks include
dry-recorded kick and snare drums, acoustic guitar and piano along
with spoken word and a cappella male and female vocals. A data area
on the disc features BPM charts, Excel-based calculators and other
bonus material. The CD booklet includes tutorial information on
using the test disc."
For sale: Three Denon DR-M34HR
cassette decks ($500srp) with three heads and live monitoring of
the recording, dual Dolby B/C and Dolby HX Pro circuitry. Handles
normal, chrome and metal-tape cassettes. Highly regarded in 1988.
Gasparo Records used them as duplicators. In good shape. Data at
www.VintageCassette.com/denon/dr-m34hr.
$125 ea+shipping. Contact David B. Hadaway. dbsys22@att.biz.
For sale: Arcam Solo Movie 5.1
(www.Arcam.co.uk/products,solo,Movie-Systems,SoloMovie51.htm;
$4500srp) The manual is downloadable from the Arcam website. I do
not have original packaging. $1000+shipping, which will be calculated
once destination is determined. Funds transfer or cash only; no
checks. Fred Ampel (FAmpel@KC.RR.com).
For sale. Two Tannoy HPD 315
speakers, made in the mid-1970s, woofers might need refoaming. Steven
Weiner (SDWeiner@ATT.net;
818-865-0601; Thousand Oaks, CA) is asking $500+s/h. [I have seen
a photo; the cabinets and grill look to be close to mint condition.
This ad was placed at the request of member Randy Hoffner. DJW]
Seeking: Soundfield Mark IV
microphone. Jim Mastracco (James.Mastracco@Verizon.net).
Laserdiscs for sale by David
J. Weinberg (301-593-3230; WeinbergDJ@BostonAudioSociety.org)
Four have Dolby Digital 5.1 soundtrack. Nine have DTS5.1 soundtrack.
Make offer for all or selected items.
| TITLE |
CLV / CAV? |
ASPECT
RATIO |
| Video Essentials |
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| Apocalypse Now |
CLV |
2 |
| Apollo 13 |
CLV |
2.35 |
| Batman (Michael
Keaton) |
CLV |
1.78 |
| Blade Runner
(Director's Cut) |
CAV |
2.48 |
| Blown Away |
CLV/CAV |
2.35 |
| Crimson Tide |
CLV |
2.35 |
| Daylight |
CLV |
1.85 |
| Evita |
CLV |
2.35 |
| Forbidden Planet |
CAV |
2.35 |
| Golden Eye |
CLV/CAV |
2.35 |
| The Grifters |
|
|
| Highlander (10th
Anniversary Director's Cut) |
CLV/CAV |
1.82 |
| The Hunt for
Red October |
CLV |
2.35 |
| In The Mouth
Of Madness |
CLV |
2.35 |
| Jurassic Park |
CLV |
1.85 |
| Jurassic Park |
CAV |
1.85 |
| Phenomenon |
CLV |
2.35 |
| Pocahontas |
CLV |
1.66 |
| Pretty Woman |
CLV |
1.85 |
| Raiders of the
Lost Ark |
CLV |
2.35 |
| Raiders of the
Lost Ark |
CAV |
1.33 |
| Star Wars: Episode
1 - A Phantom Menace |
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| Toy Story |
CLV |
1.78 |
| Who Framed Roger
Rabbit |
CLV |
1.75 |
Own a movie theater sound system! For
sale, top-of-the-line High Performance Stereo HPS-4000-XL screen
speaker systems. Three (left, center, right) HPS model 545-4 speaker
systems (www.HPS4000.com/pages/fivefortyfive_.html)
and two HPS model 545-W subwoofer speaker systems (www.HPS4000.com/pages/545_w_.html).
All in perfect working order. The speakers are not light, but consist
of modules that can be lifted by two moderately strong men. Truck
delivery only, or come pick up. Make me an offer. David J. Weinberg
(301-593-3230; WeinbergDJ@BostonAudioSociety.org):
Most units come with user manuals (some
also with service manuals), remotes and cartons, as applicable.
Make offer:
- ReplayTV 2020 with aftermarket larger
disk drive. Includes lifetime electronic program guide service.
- Faroudja VP400A video quadrupler.
Upscales NTSC video to 960 progressively scanned lines for a front
or rear CRT projector. Generates great image on my big screen.
I don't need it because I'm modifying my video system.
- Runco 980Ultra CRT projector (original
packing, user and service manuals).
- Vutec concave high-gain silvered screen.
8' wide, 16:9 aspect ratio, with wallmount brackets. Silvered
surface makes it appropriate for 3D projection, as the high gain
overcomes the substantial light loss caused by the various consumer
3D projection technologies, and the curved shape can deliver a
wide viewing angle with little hotspotting.
- Lexicon DC1 surround processor, with
all options.
- Panasonic RP-91D DVD player with JVB
Digital regionfree mod.
- Sony DVP-NS755V SACD (multichannel
and stereo), DVD, etc., progressive-scan output. $250srp.
- Tektronix D11 rackmount single-beam
storage oscilloscope with 5A15N vertical amp and 5B10N time-base/amplifier.
- Tektronix 5111 rackmount single-beam
storage oscilloscope with two 5A18 vertical amps and 5B10N time-base/amplifier.
- Teac AN-180 external dual Dolby B processor.
Simultaneous stereo record and playback.
- Pioneer CT-F4242 cassette deck, in
excellent condition.
- Garrard RC88 turntable with Shure M3D
cartridge, in excellent condition.
- Sony XM-5046 car audio amp, 4x50W into
4 Ohms
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