Don't want to get off topic, but initially there were side wings, which I later removed. It became uglier, but the sound improved. There was less quantity of bass, but it's quality improved. There was less resonance and...maybe I understand why some folks are baffled by the lack of baffles 😀
But, all I want to say here is: If you can afford more expensive bass speaker (than Beta 15) go for it...
In Mr. Pass slot loaded design the woofer physical position is very different compared to the classic open baffle.
My guessing is this make woofer sound deeper....without big box. Great trick 🙂
My guessing is this make woofer sound deeper....without big box. Great trick 🙂
From Soundhappy's link @Eminence website:
"As a general guideline, Qts of 0.4 or below indicates a transducer well suited to a vented enclosure. Qts between 0.4 and 0.7 indicates suitability for a sealed enclosure. Qts of 0.7 or above indicates suitability for free-air or infinite baffle applications."
Slotted OB are quite different and SLOB are normally used with B5, ACN or MiniDSP.
From original Papa's SLOB article with multiple woofers:
"It's easier to use an active crossover when you want quick results. You just adjust the crossover filters, measure, listen, and then repeat the process until you're happy. It did not take me long to get good results because the mating of the woofer and tweeter were well behaved. I used a 2 pole low pass filter for the bottom at 80 Hz and a 2 pole high pass filter at 160 Hz, and because I am lucky the proper response was with both drivers in phase.
Some equalization was called for on both drivers. The woofer received a high Q high pass filter at 20 Hz which removed subsonics and gave the response a 6 dB bump up at 20 Hz. The Lowther enjoys 4 dB of step correction above 2 Khz or so to take down the overall top end. If you are a little off-axis, you might decide that 2 dB is better"
Cheers peppinnino, I was just catching up on Soundhappy's link when your post arrived.
I get the general rules of thumb you mention, however, and in retrospect I didn't put this very well, I was questioning if the SLOB is a different use case where those rules of thumb don't work as well - when looking for alternative bass drivers to the Definimax, do we know what the important parameters are in the the SLOB context?
I get the general rules of thumb you mention, however, and in retrospect I didn't put this very well, I was questioning if the SLOB is a different use case where those rules of thumb don't work as well - when looking for alternative bass drivers to the Definimax, do we know what the important parameters are in the the SLOB context?
Need Someone To Point Me In The Right Direction in Choosing an OB Project
Maybe power handling and XMax, as they will be equalised @+6dB 20Hz. For that reason Alpha woofers are not a good choice
Maybe power handling and XMax, as they will be equalised @+6dB 20Hz. For that reason Alpha woofers are not a good choice
Yes, that reference to Papa preferring lower QTS was what prompted me to question if conventional OB wisdom applies with the SLOB.
There's another realisation of the SLOB on AudioCircle here;
Pass Slot Loaded Open Baffle Speaker Build Underway
There's another realisation of the SLOB on AudioCircle here;
Pass Slot Loaded Open Baffle Speaker Build Underway
Still don't understand that +6db is for compensate the LOW Qts of 0,5 !! this is still open baffle with two Pa trick , the slot and as do some reflex the gain of the floor .
PS
Maybe that front air load can work like half H baffle /ripole..
.....
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Sorry lost last two words ,btw he never use hi qts in is OB , isn't a problem just look AE OB drivers
Another OB classic " Liionidas" example: 300B/845 Amp: Driver Options – Bartola(R) Valves
Why in Mr. Pass design the woofer sound waves are reflected by the floor
does this work like the touch of "acoustic ~ frequency extension" ?
What's was the concept developement story ?
It's not typical open baffle..I like a lot this more compact size approach
Why in Mr. Pass design the woofer sound waves are reflected by the floor
does this work like the touch of "acoustic ~ frequency extension" ?
What's was the concept developement story ?
It's not typical open baffle..I like a lot this more compact size approach
Liionidas seems a GREAT OB W/passive crossover project. Pity that drivers are not so affordable...
Lii Song now offers a complete kit:
Pair | Liionidas Open Baffle and XO Without Drivers | Simple and Musical Complete Solution - Lii Audio, unique speaker, amplfier, quality and cost-saving parts for HiFi DIY
Lii Song now offers a complete kit:
Pair | Liionidas Open Baffle and XO Without Drivers | Simple and Musical Complete Solution - Lii Audio, unique speaker, amplfier, quality and cost-saving parts for HiFi DIY
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DIY them and save money for the drivers 😉 http://www.modelpromo.nl/audio-dand...Speaker/The Liionidas Open Baffle speaker.pdf
Audio Dandy - How to enjoy High Resolution Audio
Audio Dandy - How to enjoy High Resolution Audio
I’m just about done reworking some baffles I made a while ago to fit a pair of the Lii Crystal 10 drivers in.
The woofers will be AE Dipole 15 driven by Hypex amps.
I am think the one AE 15 will do the job, if not, I will add a slot chamber below with an AE Dipole 18.
I found all my sets of drivers used at a huge discount. You just have to be patient and keep checking various online classifieds.
I’ll run these active with a B5 I also got used.
I want to do a “showdown” between my ACA and F2J monoblocks and my new VFET amp on the top end.
The woofers will be AE Dipole 15 driven by Hypex amps.
I am think the one AE 15 will do the job, if not, I will add a slot chamber below with an AE Dipole 18.
I found all my sets of drivers used at a huge discount. You just have to be patient and keep checking various online classifieds.
I’ll run these active with a B5 I also got used.
I want to do a “showdown” between my ACA and F2J monoblocks and my new VFET amp on the top end.
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@ Chromenuts
With such high quality drivers build a Mr. Pass full version of the slot loaded baffles are one excellent idea 🙂
With such high quality drivers build a Mr. Pass full version of the slot loaded baffles are one excellent idea 🙂
