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MIC1) Microphones cook book
ISBN 88-88334-08-4 Pages 192 Dimensions :16 x 23 x 1,1 cm.
Author Paolo Torsello Editorial Project Luciano Macrì.
Index: Foreword. Introduction: the importance of microphones in
recording. Microphones types: pressure, velocity or pressure gradient,
omnidirectional, bidirectional, carbon crystal, ceramic, dynamic or
moving coil, condenser, frequency modulated, radiomicrophone, electret,
PZM and ribbon. Microphones Omnidirectional, Bidirectional,
Unidirectional, . The carbon type microphones. The piezoelectric crystal
and ceramic microphones. Dynamic or moving coil microphones. Condenser
microphones. Frequency modulated microphones. Radio microphones.
Electret microphones. PZM Pressure Zone Microphones from the Amcrown co.
An outline of microphones history. Review of modern and vintage. Details
of microphones: A.K.G., R.C.A., Shure, Electro Voice, Sennheiser,
Schoeps, Beyerdynamic, Calrec, Hebden Sound, Soundfield Research, Milab,
Telefunken, Sony, Sanken, Fostex, Bang Olufsen, Bruel & Kjaer, Revox,
Studer, Groove Tube, Telwa, Neuman, Beyer. Importance of using tube type
microphones in audio recordings.
BEST1) The best of Audion
Editorial project Luciano Macrì
ISBN88-88334-33-5 Pages 66 Dimensions:28,5 x 21 x 0,5 cm.
The book include projects for DIY HI FI enthusiast. The first is a high
sensitivy speaker project using Dynaudio drive units . Is included the
thought processes , plans, crossover circuit diagram. The second article
is about Philips E88CCSQ professional tube of ECC88: full data tables
are included. One other project is a good preamplifier line and phono
that use ECC83 and ECC82 valves. Full costruction instructions are given
and is avaible printed board too. One other interesting article is about
cross reference between Russian and European – American valves. One
other project is a Loftin- White Siungle Ended with 2A3 and ECC83 and
GZ34. One very interesting article is a very interesting discussion
about power supply interaction with armonic generation by using a shunt
beam tetrode in the supply ecc. A very good project Single Ended 6C33CB
is also included with the name “Soviet Panzer” with 6C33CB and PT49
driver and 5R4WGY. In this book are included two project with 300B
Single Ended. One is with 311 and PT8 driver and one other is with PT49
driver. Both use valves rectifier.
VAL2) Vacuum Tube Hi-Fi Manual With Diagrams
Authors: Luciano Macrì and Stefano Bevacqua.
With this book You can provide to do –it- Your self (DIY) audiophile
preamplifiers and amplifiers. The book is for beginners and for people
with more experience to attempt the design and engineering of the tube
systems and the upgrading of commercial design.
Index: Preface, introduction, Project definition, the reproduction chain,
introduction to amplification, amplification circuits, the phono
preamplifier, the MC phono preamplifier, the line preamplifier, choosing
the circuit, the power amplifier, the output stage, driving the single
ended output stage, driving the push-pull output stage, power supply
stages, choosing components, selection criteria, choosing tubes,
choosing resistors, choosing capacitors, the other components, the
output, putting it togheter, building the preamplifier, building the
power amplifiers, building the power supply, the chassis, checking and
testing, preamplifier functional test, power amplifier functional test,
test measurements and equipment, the listening,
The book also include many schematics diagrams from Audio Innovations,
Audio Research, Conrad Johnson etc.
VAL1b) Manuale hi fi a valvole . Schemario
Authors: Luciano Macrì and Riccardo Gardini
ISBN 88-88334-11-4 Pages 210. Dimensions : 29,5 x 21 x 2.
This book is only a schematic diagrams (138) with the most interesting
valve hi fi amplifers: Acrosound, Alktec, Art Audio, Audio Innovations,
Audio Note, Audio Research, Avantic, Bogen , Luxman, Carver, Conrad
Johnson, Curcio, Digitex, Dynaco, Eico, Electrovoice, Eltus, Futterman,
Tomita, Hampton, Heahkit, Hi-Tone, Kappler, Jefferson, Ken, Klimo, Leak,
Loyez, Mac Hintosh, Marantz, Williamson, Marshall, Michaelson Austin,
Millerieux, MJ, OTL, Quad, Radford, Revox, Sage, Scott, Stereo gallery,
Technics, verdier, VTL, Uesugi, data sheet of 6336, 100TH.
ACU1) Loudspeakers- environment system setup
Dimensions: 16 x 23,5 x 1,2 cm.
Authors: Italo Adami and Fabio Liberatore, Editorial project Luciano
Macrì.
Index: Introduction. Resonances and reflections. The acoustic treatment.
How to realize an acoustic treatment for stereophonic listening. The
positioning of the speakers and listening point. The rule of the thirds,
the rule of the fiths and more. Positioning “by ear”. Searching for the
best position by using specific software systems. Resonances. The
treatment of the early reflections. Search for the primary reflection
points. The lateral reflections. The back reflections. Reflections
treatment. Necessary data and plan acoustic treatment. The audio quality
test (A.Q.T.): evaluation elements. Evaluation of the tonal balance.
Tonal balance under 100 Hz. Tonal balance within the warm zone. Tonal
balance within the lower mediums. Evaluation of the musical articulation.
Relationship between tonal balance and musical articulation. Practical
solutions to the most frequent problems: confused and resonant basses,
acustic slime- Harsh sound-Squashed image- Hole in the middle of the
image, lack in focusing- Room wich saturated at low volumes, lack in
dynamics-Narrow image-Unbalanced image- Unacceptabler sound and
stage-Small losses of tonal balance (sound too brilliant or too dull)
when a DAAD acoustic treatment is being used.- Poor, dry, or oversharp
sound when a DAAD acoustic treatment is being used- Uselessness of the
DAAD. The questions and the aswers of a method- the acoustic analysis
with the A.Q.T. signal. How is the A.Q.T signal. Acustics power and
sound-pressure level. Direct sonic field and reverberated field. The ear
as an instruments of integration precedence effect- Haas effect. How the
uman ear perceives level differences. Critical bands. Comb Filtering.
The effect of amplitude rations on comb-filter peak height and null
depth. Masking the defect of the surrounding in time. Consequences of
the realization of the A.Q.T. signal . Why 20 dB. Evaluation of the
surrounding reflections. The level of reflections. The most advanced and
recent studies. Olive and Tool’s curves. Listening: acoustic parameters.
Articulation. Tonal balance. Soundstage. Focalization. Dynamic range.
DIF2) Horn Loudspeaker Design
Authors: J. Dinsdale. Editorial project Luciano Macrì
ISBN88-88334-07-6 Pages 116. Dimensions :116 28,5 x 21 x 0,7.
Index: Foreword. Background. General theoretical principles.
Determination of flare contour. Determination of mounth area. Plane and
curved wavefronts. The tractrix contour. Efficiency.Tuning the throat
cavity. Loading the rear of the loudspeaker motor. Flare profile. Mouth
geometry. Throat geometry. The horn as a filter. The complete multi-horn
system. Folding, cabinets and room placing. Frequency handling.
Directional Horns. Detailed design procedure.Bass horn design. Middle
top horn dwesign. Integration of multiple horns. The complete design.
Conclusion of design theories with the details of two horn for
construction. Design of a “mini horn”. Bass horn. Treble horn.
Integration and complete desgn. Design of a no- compromiser horn.Bass
horn. Middle horn. Treble horn. Integration and complete design. Short
use of the software included in the book. Plans of this following
Lowther loudspeakers:Bicor 2A, Bicor 200, Classic 400, Opus One,
Accolade Four, Academy, Accolade 100, Medallion, TP1 Isis, Acousta 115,
Acosuta 124, Fidelio, Mauhorn Type 4, Mauhorn 5. Book include one
software to compute horn loaded speaker enclosures.
Book Review
January
2001
Enjoy the Music.com
Book Review: La Progettazione Dei Diffusori A Tromba
(Horn Loudspeaker Design) Project Editor: Luciano Macrì
http://www.enjoythemusic.com/magazine/equipment/0101/hornbook.htm
Review
By Dick Olsher
La
Progettazione Dei Diffusori A Tromba This is a cool little book that
should appeal to those in search for basic information on horn loudspeaker
design. The book's main reason for being is to reintroduce Jack Dinsdale's
classic horn articles to a wider audience. Dinsdale's articles, originally
published in Wireless World in 1974, have long represented an authoritative
and informative summary of horn knowledge and practice, and were written
with sufficient passion and clarity to qualify as a basic reference
on the subject.
The
book is laid out in bilingual fashion, in double column format, in both
Italian and English, which might give you a chance to pick up a bit
of Italian vocabulary on the side. The author is well aware of the work
of Voigt, Wilson, and Klipsch. The basic theory of both exponential
and tractrix horns is described. It may surprise some to learn that
even in the early 70s, on the basis of listening tests, the tractrix
was supported as the optimum horn contour. The scope of the articles
includes a detailed discussion and guidance about folded horns. This
is essentially an art form, since as Dinsdale puts it: "As soon
as one departs from the straight horn of circular cross-section, the
scientific design principles described cease to be relevant and become
more of an approximate value…" this follows on the heels of Wilson's
admonition: "It cannot legitimately be assumed that a horn incorporated
in a cabinet has the precise characteristics of any particular type
of straight horn, whether exponential, hyperbolic, catenary or tractrix,
even though their dimensions have been used as guides in its construction.
The multiple changes of direction, coupled with reflections and absorptions
and internal resonances, are always such as to destroy any legitimate
comparison. Every internal (horn) enclosure construction must be judged
on its own merits as revealed by measurement and by listening tests."
I bring this up because, due to space (and cost) constrains, almost
all commercial horn designs are of the folded variety. The final two
articles consider in detail the design of two horn systems: a "mini-horn"
and a "no compromise horn."
Following
the Dinsdale articles is a short but entertaining discussion by Paolo
Viappiano, Director of the Italian magazine "Costruire HiFi,"
of recent developments in horn praxis. The contributions of both Richard
Small and D. B. Keel are briefly mentioned, as are some computer program
resources.
A
computer program that automates horn design, written by Giampiero Matarazzo,
is included on a floppy disk. The program will need to run under a DOS
window on Windows based personal computers. I didn't receive a copy
of the program so I can't really comment on its utility.
The
book's final section contains a large number of schematics and pictures
of various horn designs, including the plans for several Lowther enclosures
(e.g., Opus One, Academy, and Acousta 115) as well as the Mauhorn type
4 and 5. This should give the reader a glimpse of the great variety
and ingenuity inherent in folded horn designs.
All
in all, this is book would make a worthwhile addition to any serious
hobbyist's reference library. I certainly enjoyed revisiting a subject
that is dear to my heart. The book is nicely edited and packaged. It
is published by Audion Magazine and is available directly from the publisher,
Luciano Macrì:
Demidoff
Editore
C.P. 6599
50127 - Firenze - Italy
Website:
www.audion.net
E-mail: info@audion.net
Audio
reality. Myths debunked…..Truths Revealed
By Bruce Rozenblit
Are you confused about wich accessories to
buy? Have you ever wondered how they work? Do claims made in
advertisements seem too bizarre to be real? This book will give you the
knoledge needed to aswer these questions youself. By using simple
analogies with clear explanations, the author equips the reader with
the science that governs the operations of these devices without using
any math. By replacing “miths” with “fact” the reader acquires essential
information that yelds the greatest value from your purshasing dollarand
not be taken advantage of. Topics include: conductors, connectors, skin
effect, impedance, interconncts, speaker cables, balanced lines,
trasmission linees, power cords, isolation transformers, damping
systems, feedback, vacuum tubes, acoustics and much more. Become your
own expert.
Six projects are included wich are the
actual desaign of the Transcendent Sound prodct line that you can buil!
Complete schemastics, parts list, and circuit explanations are provided.
All design techniques are vrevealed-Nothing held back. Sonic
performanceis identical to the commercial produced product. In addition,
tips and procedures for working sheet metal and wiring are covered.
Learn and benefit from the author’s years experience designing and
building high-end audio equipement. Projects include: The highly
acclaimed aand patented Transcendent OTL in both 25 and 80 nwatt
version, the gronded grid preamp, the super compact 150 watt amp, the
cathode follower grid preamp, the super compact 150 watt amp, the
cathode follower single-ended amp, and a new phono preamp design.
Author Bruce Rozenblit is one of the most creative and
controversial figures in high-ended audio today. He’s an elactrical
engineerr, B.S.E.E., and patented recipient who owns and operates
Transcendent Sound Inc.. a manufacturer of high-end equipment. With 20
years of professional design experience, he has draw on the lessons of
the past to develop a line audio equipment that is unmatched for is
innovation in dsign and performance. He pulls no punches and tells is
like it is. Learn from someone who’s been on the inside, someone who
really knows. |
