Acoustic first order low pass filter can be applied upon the woofer to get rid of undesired sounds rather than electrical filter. As the coil inductance disengages from loading , the woofer can be powered directly. The acoustic filter can be done simply by a cloth more or less thick covering the woofer.
This is about a 7L box with a 5.25in AC130F1 - same as used in Bagby’s tribute to the LS5/3A - the Continuum. The twist is a 2.5in aluminum full range with a 1kHz crossover for a FAST that has good transient response.
FR58EX and AC130F1 micro-FAST / WAW
Don’t fixate on the number of components. This is a very simple crossover.
Resistors and small inductors and caps are inexpensive.
If you can get an earlier generation of FR58EX, it doesn’t have the 10kHz breakup.
Last edited:
This is the most neutral bookshelf speaker I built. Crossover consists of just one capacitor. This is due to well behaved midrange. Off course it needs woofers, but i run those actively in biamp system.
Audio Pages
Or check out my betsy wow with ribbon. It has just bsc on betsy (coil in parallel with resistor) and one cap on ribbon crossed high enough. This bookshelf actually does not need woofers, if you do not require disco loud.
betsy wow and ribbon
betsy wow and ribbon
xrk,
in post 23 (above)
the 2nd graph.
What is the dashed line ?
I see the phase in the 3rd pic (nice).
in post 23 (above)
the 2nd graph.
What is the dashed line ?
I see the phase in the 3rd pic (nice).
I'm using a 2 way WAW system with 2 Xover components.
Drive units are Monacor SPH 8M 8inch woofer and Mark Audio Pluvia 7 (4 inch) full range unit.
I'm using a 1st order series Xover at around 300Hz with no attenuation on the Pluvia.
I'm using bass reflex of approx 44 litres but the Monacor in 20 litre sealed gives a Q of 0.707 and approx Q of 0.9 for 10 litres. A few litres are required for the Pluvia so could be done in about 13 litres net with about a 1dB lift at approx 100Hz due to the Q.
Sorry I don't have any measurements, all done by ear. I messed around with a parallel 1st order for a while, when I tried a series Xover it just seemed to gel.
Drive units are Monacor SPH 8M 8inch woofer and Mark Audio Pluvia 7 (4 inch) full range unit.
I'm using a 1st order series Xover at around 300Hz with no attenuation on the Pluvia.
I'm using bass reflex of approx 44 litres but the Monacor in 20 litre sealed gives a Q of 0.707 and approx Q of 0.9 for 10 litres. A few litres are required for the Pluvia so could be done in about 13 litres net with about a 1dB lift at approx 100Hz due to the Q.
Sorry I don't have any measurements, all done by ear. I messed around with a parallel 1st order for a while, when I tried a series Xover it just seemed to gel.
Legend on right side of graph. System phase - acoustical phase at microphone predicted by xsim. It can shifted somewhat by delaying the amp relative to both drivers (or equivalent to small position changes in the mic).
The seas A26 kit speaker only has a capacitor and a resistor on the tweeter.Nothing on the woofer.It is not that small however.
small?
Decware 945
1 cap
DECWARE High Performance 94dB efficient Bookshelf Monitor model DM946
Simple Silver Flutes 2 Way
Decware 945
1 cap
DECWARE High Performance 94dB efficient Bookshelf Monitor model DM946
Simple Silver Flutes 2 Way
Last edited:
Here's another commercial speaker with 1 cap
REFERENCE 3A - Reflector
Does anyone know what the woofer is?
(carbon fiber coaxial, something)
REFERENCE 3A - Reflector
Does anyone know what the woofer is?
(carbon fiber coaxial, something)
What I red is that the alnico exotic tweeter is a little difficult to obtain but they have a cheaper neodymium which probably works just as fine. The bass is in stock around. As a complete kit I don’t know but who wants kits anyway.
SEAS The Art Of Sound Perfection
TWEETERS
SEAS The Art Of Sound Perfection
All plans and all here:
SEAS A26 Kit
Considering this myself as I have fond childhood memories of the a25.
Last edited:
DA990 SURROUND - WilAudio
(alexaudio site is gone, I saved this- translated (Google Translate) from French. (note: there were no graphs, no other specs)
DA990 Surround speakers.
The closed-load woofer, of very low volume, offers a response in the bass suitable for its use in rear effects enclosure. The speakers are filtered in 6dB/oct with only 3 components. The enclosure is built in 15mm thick MDF.
3.75 liters heavily packed dacron
AlexAudio DA990 front mains (more components)
Enceinte 2 voies haute-fidelite | alexaudio
(alexaudio site is gone, I saved this- translated (Google Translate) from French. (note: there were no graphs, no other specs)
DA990 Surround speakers.
The closed-load woofer, of very low volume, offers a response in the bass suitable for its use in rear effects enclosure. The speakers are filtered in 6dB/oct with only 3 components. The enclosure is built in 15mm thick MDF.
3.75 liters heavily packed dacron
AlexAudio DA990 front mains (more components)
Enceinte 2 voies haute-fidelite | alexaudio
Attachments
Last edited:
This is from 2002. It says cap and coil. They list the model numbers for the woofer and tweeter.
Triangle Titus 202 [English]
===============================================
check post #35 & #36 Tetra 222 & 120U speakers- buy some caps and start listening.
DIY Clones of commercial speakers
Last edited: