I am about to embark on a 3-way floorstanding speaker project to replace my AOS Studio 12XL, that I had to get rid of due to a crawling baby that has appeared at home. Scan-Speak
I am very keen to do a version of the Hobby Hifi Faktum: Hobby HiFi Loudspeaker Kits: Faktum
Crossover points, 150Hz, and 2.2kHz.
I do have some physical limitations however, and for aesthetic reasons, I want my speakers to be only circa 60cm high. I have designed a pyramid style enclosure that maintains the baffle shape, and spacing of the drivers, however it will only have a bass cabinet of 30-40 litres instead of the 60 litres of the original design.
I have seen the HazAudio.co.nz website, and they recommend using the 22W8851 in a 1.2 cubic foot enclosure with a 2.5" vent by 8" long for F3 of 38Hz. This is about 33 litres, which I can accomodate. Extreme low bass is not essential.
Two questions to start with:
Will the reduced bass cabinet volume and different tuning affect the blending with the midrange driver, or just change the bottom end?
What affect will there be due to the bass driver being only 10cm from the floor?
I am aware that the tweeter should be at ear height, but I have tried the AOS Sudio 12s (nearly identical tweeter and mid drivers) on the floor, and their dispersion characteristics were fine.
I have a copy of the original Hobby Hifi Faktum article. Here is a copy of the cabinet drawing and the crossover design:
P.S. I already have the tweeter and midrange units.
P.P.S. My listening room is 6m x 4m x 2.2m. My gear is Twisted Pear BuffaloII into Hypex UCD180HG Hxr.
I am very keen to do a version of the Hobby Hifi Faktum: Hobby HiFi Loudspeaker Kits: Faktum
Crossover points, 150Hz, and 2.2kHz.
I do have some physical limitations however, and for aesthetic reasons, I want my speakers to be only circa 60cm high. I have designed a pyramid style enclosure that maintains the baffle shape, and spacing of the drivers, however it will only have a bass cabinet of 30-40 litres instead of the 60 litres of the original design.
I have seen the HazAudio.co.nz website, and they recommend using the 22W8851 in a 1.2 cubic foot enclosure with a 2.5" vent by 8" long for F3 of 38Hz. This is about 33 litres, which I can accomodate. Extreme low bass is not essential.
Two questions to start with:
Will the reduced bass cabinet volume and different tuning affect the blending with the midrange driver, or just change the bottom end?
What affect will there be due to the bass driver being only 10cm from the floor?
I am aware that the tweeter should be at ear height, but I have tried the AOS Sudio 12s (nearly identical tweeter and mid drivers) on the floor, and their dispersion characteristics were fine.
I have a copy of the original Hobby Hifi Faktum article. Here is a copy of the cabinet drawing and the crossover design:
P.S. I already have the tweeter and midrange units.
P.P.S. My listening room is 6m x 4m x 2.2m. My gear is Twisted Pear BuffaloII into Hypex UCD180HG Hxr.
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Good thinking. They are similar, may be OK without changes.
The various benefits of pyramidal cabinets are debatable. If you have the skills, you might consider rounding the front edges.
If you can't get your reflex to play the way you want to you could always block or partially block the port.
To a degree, both. The concern is that your bass crossover is low, ie. not too far from the impedance peaks caused by the cabinet loading. You may be able to proceed regardless and deal with it only if you feel the need.
Less floor reflections. These reflections are sometimes considered for both the bass driver and the mid, and this information used in deciding the crossover frequency between them. Was it mentioned in the article?
Speakers aren't always intended to be listened to on-axis. Consider building them at around ear height, and toeing them in to take the beam off you.
Hi Allen: You have given some confidence to progress.
Actually, I was going to add 20mm to each side, and round it over with a 20mm bit. The verticle lines on my diagram show where the roundover will begin. I think that this should match the effect of the bevelled original.
The article is in German, so I couldn't say. Anyone up for some serious German to English translating?
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