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ORION - PLUTO
by Wood Artistry

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ORION - PLUTO
by the sea

Do-It-Yourself

 

 

Concepts

Loudspeakers

Crossovers

Room acoustics

Sound
reproduction

Room optimized
stereophonic
reproduction
 

Recording for stereo

Design of
loudspeakers

Issues in 
speaker design

 

 

Projects

ORION
challenge

ORION++
Concert Hall

PLUTO
omni speaker

PLUTO+
subwoofer

THOR
subwoofer

PHOENIX
dipole speaker

     Active filters

     Microphone

     FAQ

Reference
earphones

Surround
sound

Loudspeaker
evaluation

 

 

Resources

Website CD

Toneburst CD

Demo CD

Publications

Music

Links

Site map

About me

 

 

Conclusions

 

 

HOME

 

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Products ... Concepts ... Projects ... Resources ... Conclusions ...

 

Products ...

ORION - PLUTO
by Wood Artistry
- ORION
- ORION System Specifications
- System Order Form
- Kit Order Form
- Examples of wood and grill cloth choices
- Wood colors and grains 
- THOR subwoofers for ORION

- PLUTO+

ORION - EU - ORION Loudspeaker System - Europe
ORION - BR - ORION Loudspeaker System - Brazil
ORION - PLUTO
by the sea
- Honeymoon Cottage
- Sea Pine Cottage
Do-It-Yourself - Do-It-Yourself products

Concepts ...

Loudspeakers - Loudspeakers - What should they do?  
Crossovers - Crossovers
- The Duelund 3-way crossover filter function D3
 
Room acoustics - Room acoustics
- Loudspeaker directivity and room response
- Room reverberation time T60
- Room modes, etc. - modes1.xls
- Radiation patterns - radpat1.gif
- SPL inside small enclosure - enclosure-spl.gif
Sound reproduction - Sound reproduction
   Live event
   Reproduction
   Distortion during playback
   My Objective
- Are they HERE or are you THERE?
- Sound quality glossary - sd-qlty.gif
Room optimized stereophonic reproduction - Presentation
- A new look at Recording for Stereo
 
Recording for stereo - A progression
- The praxis
 
Design of loudspeakers - Design of Loudspeakers
- High-End Audio design at CES 2003
- CES 2004. Does it get any better?
- Sort of a summary - August 2005
- Commercial dynamic dipole loudspeakers
- CES 2006
- August 2006 - ORION and PLUTO+
 
Issues in speaker design

A - Acoustic absorption and acoustic resistors
B -
Frequency response of open baffles
C -
Dipoles below the Schroeder frequency of a room
D -
Room and baffle reflections
E -
Line sources
F -
Group delay and transient response
G -
Multitone distortion
H -
Suggestions and hearing
I -
Digital crossovers
J -
Doppler distortion
K -
Room response equalization
L -
H-frame and U-frame open-baffle woofers
L2 - H-frame and U-frame open-baffle woofers
M - Investigation of energy storage
M2
- Investigation of energy storage
N -
 Mounting a driver to a baffle
O -
Unreasonably high distortion in midrange drivers?
P -
 Estimate of Le(x) induced distortion at high frequencies

Q -
Estimate of Le(i) induced distortion at high frequencies
R -
Recommended study material about distortion in loudspeaker drivers

S -
Dipole and monopole woofer response
T - Separate woofer crossover and offset
U - Woofer level setting

- Doppler distortion - doppler1.gif

- Different view of Doppler distortion - doppler2.gif

- SPL dependent driver behavior - SPL-dependent.xls

- Room absorption - T60-absorption.xls

- Standing waves - dipole-impulse-2.ckt 

- Standing waves - dipole-freq-2.ckt

 

Projects ...

ORION challenge - The challenge to build a state of the art
   loudspeaker yourself
- What is involved in building the ORION?

- Supplies and materials to build ORION
- Promotion 
- THOR-ORION crossover/equalizer
- Photo Gallery
- ORION reviews 
- Analog Signal Processor - ASP
- Frequently asked questions
- Revision 0.1 of the ORION
- ORION crossover/equalizer response -
   orion-xo-eq.gif

- Content of documentation - orion-doc.gif

ORION++
Concert Hall
- From your Living Room to every Concert Hall  
PLUTO omni speaker - Introduction
- Specifications and operating characteristics
- Construction of the enclosure
- Power amplifier, crossover and equalizer
  electronics module
- Supplies and materials to build PLUTO
- Photo Gallery
- Pluto-2
- PLUTO-2.1
- Pluto-3
 
PLUTO+
subwoofer
- Concept & design
-
Woofer ASP
- Supplies to build the subwoofer
 
THOR subwoofer  - Build your own subwoofer
- Subwoofer design estimates
- Subwoofer design
- Woofer measurements
- Frequency response equalization
- THOR-ORION crossover/equalizer
- Supplies and materials to build THOR 
- Electrical and mechanical limits to sound output
  from a closed box woofer
- Closed box woofer design - closed-box1.xls

- SPL inside box - enclosure-spl.gif

- Distortion of air compliance - air-distortn.gif

- s-plane for highpass filter - 12db-hpf.gif

- Content of documentation - thor-doc.gif

 

 

PHOENIX
dipole speaker

- Build your own open-baffle loudspeaker system - Commercial use of the PHOENIX technology
- Loudspeaker System Design
- Speaker stand and grill frame - stand1.gif
- Main Panel - Mechanical construction and drivers
- Distortion test of midrange & tweeter drivers
- Midrange frequency responses - mid_rsp.htm
- Audibility of allpass crossover phase distortion 
- Audibility of group delay distortion - phs-dst2.htm
- Dipole Woofer - Mechanical construction 
  and drivers 
- Excursion limited SPL - theory.gif
- Excursion limited SPL - spl_max1.xls
-
Dual voice coil wiring - dvc-wrg.gif
- Dipole Woofer 2 - Alternate drivers 2
- Dipole Woofer 3 - Alternate drivers 3 
- Crossover/EQ - Line level electronic crossover
  and equalizer
- Crossover circuit - 38xo_eq1.gif
- Crossover response - xo_eq2.jpg
- Shelving high-pass - shlv-hpf.gif
- Shelving low-pass - shlv-lpf.gif
- Active inductor 1 - inductr1.gif
- Active inductor 2 - inductr2.gif
- Active L-R crossover - xo12-24.gif
- Linear dB gain control - gain-adj.gif
- Delay correcting filter - allpass.gif
- Attenuator with Rout spec - attnrout.gif
- Input impedance measurement - input-r.gif
 -3 dB/dec circuit 1 - 3db_buff.gif
 -3 dB/dec circuit 2 - 3db_oct2.gif 
 -3 dB/dec response 1 - 3db_oct1.jpg
- Remote preamplifier - preamp1.gif 
- Power amplifier - 3886amp.gif 
- Power supply - 3886pwr.gif  
- Supplies - Printed circuit boards - ASP blockdiagram
- System Test - Electrical and acoustic system test - Crossover/EQ response - x1.gif - x2.gif
- Main panel response - p1.gif - p2.gif - p3.gif
  - p4.gif - p5.gif - p6.gif - p7.gif - p8.gif
  - p9.gif - p10.gif
- Woofer response - w1.gif - w2.gif - w3.gif
  - w4.gif - w5.gif
-
Shaped tone-burst generator - brst_gen.gif
- Shaped tone-burst -
shaped tone-burst
- Blackman window data - blkman_4.prn 

- Shaped tone-burst sound -
1kblkman4.wav 
-
Multi-burst sound - 100mbst4.wav   
- 10-cycle burst data file - cos_10.prn
- Microphone - Microphone modification - microph1.gif
- Stereo microphone - microph2.gif
- Peak detecting mic. preamp. - mic_pk.gif
- Linear dB gain control - gain-adj.gif  
- Design Models 
  A   - Two point sources of opposite polarity model
  A1 - Dipole equalization
  B   - Open baffle loudspeakers
  B1 - "Compound dipole" woofer model
  C   - Dipole woofer equalization
  C1 - Notch filter design
  C2 - 6 dB/oct slope correction
  C3 - Equalization of low Qt woofer
  D   - Midrange dipole equalization
  E   - Midrange to tweeter crossover
  F   - Midrange to woofer crossover
  F1 - Woofer level setting
  G   - Level adjustment controls
  H   - Psycho-acoustic 3 kHz dip
  I    - Voltage sensitivity of an active system
- Excursion limited SPL - spl_max1.xls
-
Excursion limited SPL - theory.gif
- Active inductor 2 - inductr2.gif
- Crossover circuit - 38xo_eq1.gif
- Shelving low-pass - shlv-lpf.gif
-
Pole-zero transform circuit - f0Q0fpQp.gif
-
Closed box response vs. impedance - f0Q0.gif
- Crossover/EQ response - x1.gif
- Prototypes  
  A - Open-baffle woofer - PW1
  B - Woofer crossover to existing midrange - PXM1
  C - Mini open-baffle speaker - PMT1
  D - Main panel with passive crossover to 
  tweeter - PMTM1
  E -
Crossover/Equalizer for passive dipole woofer
  F - Transition to fully active systems
- Woofer EQ & LR2 passive LPF - w-xo-lp1.gif
- Woofer EQ & LR2 active LPF - w-xo-lp2.gif
- Midrange LR2 highpass filter - m-xo-hp2.gif
- PMTM1 low frequency EQ - pmtm-eq1.gif
- R-L-C Zobel & RF termination - pmtm-zob.gif
-
Excursion limited SPL - spl_max1.xls
- Active Filters  
  1 -  Buffer stage
  2 -  12 dB/oct Linkwitz-Riley crossover
  3 -  24 dB/oct Linkwitz-Riley crossover
  4 -  Delay correction
  5 -  Shelving lowpass
  6 -  Shelving highpass
  7 -  Notch filter
  8 -  6 dB/oct dipole equalization
  9 -  12 dB/oct highpass equalization 
  ("Linkwitz Transform", Biquad)
 10 -  Variable gain
 11 -  Line driver
 12 -  Power supply
 13 -  Printed circuit boards 
 14 -
  Literature
- Woofer EQ & LR2 lowpass filter - w-xo-lp2.gif
-
Active L-R crossover - xo12-24.gif
- s-plane for highpass filter - 12db-hpf.gif
- General allpass configuration - ph-dst6.gif
-
Delay correcting filter - allpass.gif
-
Delay correcting filter - allpass2.gif
- Shelving high-pass - shlv-hpf.gif
- Shelving low-pass - shlv-lpf.gif
- Bridged-T low-pass - shlv-lp2.gif
- Active inductor 1 - inductr1.gif
- Active inductor 2 - inductr2.gif
-
Pole-zero transform circuit - f0Q0fpQp.gif
-
Closed box response vs. impedance - f0Q0.gif
- Pole-zero equalization - pz-eql.xls
- Linear dB gain control - gain-adj.gif 
- Attenuator with Rout spec - attnrout.gif
- Input impedance measurement - input-r.gif
- Loudspeaker System Design
- Q0 < 0.5 equalization - sb186-48.gif
- Q0 and ferro-fluids - sb186-50.gif  
- Attenuator with Rout spec - attnrout.gif
- Add-on woofer - xo-pcb.gif
- Active 4-way crossover/EQ -  4w_block.gif
- Surround - Surround loudspeaker construction  
- FAQ - Frequently asked questions - Power response - pwr-resp.gif
- Wedge micrometer - wedge-micro.gif
- Corner dipole woofer - corner-dp.gif
- Dipole placement - rfl1-dpl.gif
- Cardioid placement - rfl1-crd.gif
- Beethoven Elite
- Diffraction from baffle edges - Diffraction 
- Power to drive a dipole woofer - dipole_spl_limit.htm
- Dipole SPL limit
- Monopole SPL limit
Reference earphones - Reference earphones
- ER-4S equalization
  Headphone amplifier
  Equalizer circuit
- Sony Fontopia earphones
- Shure E2c earphones
 
Surround Sound 1 - Ambience recovery from a 2-channel CD
2 - Refinement of ambience recovery
3 - SACD and DVD-A use of the center channel
4 - A few SACD and their need for a center speaker
- Surround - Surround loudspeaker construction
Loudspeaker evaluation - A dozen ways to evaluate a loudspeaker  

Resources ...

Website CD - Content and ordering information
Toneburst Test Signal CD - Content and ordering information
Sound Pictures CD - Content and ordering information

Publications

- Letter to The Audio Critic - tac29.gif
- Letter to AES Journal - Woofer accuracy.rtf
- Which loudspeaker parameters? - AES'02.htm
- Multi-burst signal - mlt-bst0.gif
-  Multi-burst sound - 100mbst4.wav
-  Multi-burst test - mlt-bst1.gif    
-  Compact dipole speaker - cmp-dipl.gif
-  Acoustic power response - pwr-resp.gif
-  Beam-width of dipole array - beam-dpl.gif
-  Excursion limited SPL - theory.gif
-  Excursion limited SPL - spl_max1.xls 
-  Loudspeaker system design - sb80-3wy.htm ,
   sb80-3wy.zip
-  Closed box response vs. impedance - f0Q0.gif 
-  Pole-zero transform circuit - f0Q0fpQp.gif
-  Component values for p-z transform - pz-eql.xls
-  Real poles p-z transform - sb186-48.gif , sb186-50.gif
-  Shaped tone-burst - 20brst1.gif
-  Shaped tone-burst sound - 1kblkman4.wav
-  Shaped tone-burst generator - brst_gen.gif

-  Peak detecting mic. preamp. - mic_pk.gif
-  Passive L-R crossover - passv-xo.gif
-  Active L-R crossover - xo12-24.gif
-  L-R crossover response -  xo12-24b.gif
-  Delay correcting filter - allpass.gif
-  Audibility of delay distortion - phs-dst2.htm
-  Headphone cross-feed-1 - hdphon1.gif
-  Headphone cross-feed-2 - hdphon2.gif 
-  High-resolution audio, 2000 - Presentation
-  Loudspeaker talk  - AES'89.htm
Music   - Some of my favorite CD
Links - Of specific interest to my work
Site map - When searching for specifics
About me - A little bit about work, fun and life
Home - The place to start exploring
- What's new

Conclusions ...

 

Site map

Products ... Concepts ... Projects ... Resources ... Conclusions ...
 

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----  ALL there is, is this, as YOU dreams  ---- 
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Last revised: 01/15/2009   -  © 1999-2007 LINKWITZ LAB, All Rights Reserved