|
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
- Room EQ - phn-room2.xls
|
| - 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
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| - 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
- Room EQ - phn-room2.xls
- 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
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| - 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 |
