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Meetings and other Notices

The Boston Audio Society
Meeting Notice for September 2015

Date: Sunday, September 20, 2015, 6:00 PM

Place: Boston University, Life Science & Engineering Bldg, 24 Cummington Mall, 1st Floor Conference Room 103, Boston, MA 02215

Guests: Frank Doris & Kurt Van Scoy from Audio-Technica

Topic: Audio-Technica Headphones, Headphone Amps, Cartridges and Microphones

Our September guests will demo and talk primarily about a number of Audio-Technica headphones and headphone amplifiers. The Audio-Technica experts will lead a discussion on a selection of their latest headphones including the Hi-Res Audio-certified ATH-MSR7 on-ear and ATH-CKR10 in-ear models, and the ATH-W1000Z and ATH-A900x audiophile headphones. The ATH-W1000Z is a closed-back dynamic wooden headphone geared for audiophiles and music lovers ($699.95 SRP).

The meeting will also feature the first-ever US presentation of the new high-end AT-HA5050H headphone amp and D/A converter. The AT-HA5050H features vacuum tube circuitry, selectable impedance and other refinements. Attendees will have the opportunity to listen to the AT-5050H (SRP: $5999.00) and the AT-PHA100 portable headphone amp.

Frank and Kurt’s technical presentation will describe how the products work, A-T’s research into HRTF-embedded headphones and more.

Audio-Technica’s large family of audio equipment includes turntables, cartridges, mixers, cables, and a host of related accessories. Frank and Kurt will also demo a turntable/cartridge combination and they’ll offer a sneak peek at a new high-end phono cartridge in advance of its official debut. They’ll also show a few of A-T’s famous reference microphones, which have received great reviews by the audio press and select BAS members. Questions and answers on all their products will follow the presentation.

If that isn’t enough, Audio-Technica will have a prize giveaway of an ATH-PHA100 (SRP: $549.00) to one lucky winner!

Refreshments will be available at 5:30PM

Directions: Note that parking is no longer allowed in the block in front of our meeting place (temp parking for unloading/loading is OK).

At Boston University, Cummington St. (Mall) is an east-west street just south of Commonwealth Ave. It is one-way going west. From Storrow Drive going east, take the first BU exit. At the stop sign turn right on Commonwealth Ave (a left is not permitted). Bear left and at the 3rd light take a u-turn, go half a mile and turn right on Blandford St.(Mall) (at a traffic light) and turn right on Cummington St. (Mall) The entrance is on your left, number 24.

From Commonwealth Ave going west, after Kenmore Square, after the tracks come up out of the tunnel, there is a traffic light at Blandford. You should turn left on Blandford, but no left is permitted. Instead turn right and make a U-turn. Continue on Blandford and turn right on Cummington St. The entrance is on your left, number 24.

MBTA Green line - exit at Kenmore Square or the next stop, Blandford St. & Commonwealth Ave. Walk a short distance and make a left turn onto Blandford Mall and then a right onto Cummington Mall.


Use your GPS (!)
— Webmaster's note: Google maps and Apple maps show them as Blandford Mall and Cummington Mall. Bing maps shows them as Blandford Street and Cummington Street. YMMV.

The BAS Message
Sept 2015

1. In “Hidden Hearing Loss”, M. Charles Liberman reviews current knowledge about so-called temporary hearing loss. Recent research has shown that even though the hearing seems to return to normal, at least by conventional hearing tests, after intense high level noise exposure, there is permanent nerve damage. The so-called speech-in-noise tests, which measure the number of words correctly identified as the level of a background noise increase, can reveal the damage. He says there is a possibility of injecting nerve growth promoters to regrow nerve fibers as for example in the case of the victims of the Boston Marathon bombing which damaged the hearing of more than 100 spectators. Scientific American Au15.

email me here

Below, other meetings and notices which may be of interest to BAS members

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

Foster's Test Bench !
by Alvin Foster !    Click the logo: —>
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
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
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:   
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

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 !

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


AES Future Meetings

Acoustical Society of America
SMPTE New England

There is a posting of an ABX article, The Digital Challenge by Stanley P. Lipshitz HERE

( A new section! Watch for a full page coming soon ! )
NOTE: offsite links open into a new page.
BAS Members may SELL items here; anyone may BUY.

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;

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

For sale: Several CD storage racks, some made by Bostonwood ( 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 (

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 (

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

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,

Nashville AES Test CD. (; 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 $125 ea+shipping. Contact David B. Hadaway.

For sale: Arcam Solo Movie 5.1 (,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 (

For sale. Two Tannoy HPD 315 speakers, made in the mid-1970s, woofers might need refoaming. Steven Weiner (; 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 (

Laserdiscs for sale by David J. Weinberg (301-593-3230; Four have Dolby Digital 5.1 soundtrack. Nine have DTS5.1 soundtrack. Make offer for all or selected items.

Video Essentials    
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    
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 ( and two HPS model 545-W subwoofer speaker systems ( 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;

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

Webmaster's Corner:
Once again, for 2015, here's a very useful industry calendar of audio/related events, with kudos to any and all who put this list together:



The Boston Audio Society
PO BOX 260211
Boston MA 02126

updated 9/12/15