It was 45 degrees, the angle that was determined experimentally with test baffles and test boxes to be just sufficient for the desired audible result with an 8-inches coaxials that I used
I am looking into a circular round profile bezel into which the Small XT Tannoy drives can be dropped into this is going slow as I no longer have access to a shop or tools but I am still looking I was to say the least very impressed with my trials. Thanks for following up.
Sonab OA-4 enclosure with new drivers. Loudspeaker for being put against a back wall.
20cm driver fullrange driver with copper ring (working up to 4khz naturally) with aluminium foil on both sides (sandwich-design) and four tweeters in 2-2 design - 12 Ohm each (impedance total 12 Ohms) with only one capacitor. Tweeters are legendary Audax copies known for being able to work just with one capacitor (ferrofluid and diaphragm a mix of cone and dome).
Works nice with driver against the wall but some suckout at 260 Hertz which is the only part where I use dsp control to fill it up. Maybe this depends heavily on your room and if you have a resonance from floor to ceiling.
The cabinet is reflex loaded to 30 Hertz and the speaker gives quite impressive bass. As this is some kind of a horn loaded to floor and one wall.
I like the sound.
The walls were reinforced with beton 1cm inside.
Measurements are far field approx 2.5 meters away in listening height. This is the true in room response.
Quite important in my listening experience: below the the tweeters I added some thin absorbing felt. I usually always put on the loudspeaker fronts some damping as known from loudspeaker manufacturing history for better imaging, eliminating some of the first reflections from the cabinet itself
20cm driver fullrange driver with copper ring (working up to 4khz naturally) with aluminium foil on both sides (sandwich-design) and four tweeters in 2-2 design - 12 Ohm each (impedance total 12 Ohms) with only one capacitor. Tweeters are legendary Audax copies known for being able to work just with one capacitor (ferrofluid and diaphragm a mix of cone and dome).
Works nice with driver against the wall but some suckout at 260 Hertz which is the only part where I use dsp control to fill it up. Maybe this depends heavily on your room and if you have a resonance from floor to ceiling.
The cabinet is reflex loaded to 30 Hertz and the speaker gives quite impressive bass. As this is some kind of a horn loaded to floor and one wall.
I like the sound.
The walls were reinforced with beton 1cm inside.
Measurements are far field approx 2.5 meters away in listening height. This is the true in room response.
Quite important in my listening experience: below the the tweeters I added some thin absorbing felt. I usually always put on the loudspeaker fronts some damping as known from loudspeaker manufacturing history for better imaging, eliminating some of the first reflections from the cabinet itself
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What I will build next is a bigger version of this, using an old Sonab enclosure (defect drivers) I got with two of these 20cm fullrange drivers in parallel and the tweeters wired all in parallel to get more efficiency to compete with the two 20cm drivers.
Sonab/Carlsson ortho Acoustic speakers from the 70s and onwards are quite good speakers. Very easy on the ears and holographic soundstage.
I would personally try to find a pair of sonab oa14, best price vs performance ratio of all the sonab/Carlsson speakers
I would personally try to find a pair of sonab oa14, best price vs performance ratio of all the sonab/Carlsson speakers
I understand very good now why Sonab speakers were so popular in northern europe. In sweden they nearly had a monopole on this as everyone used and bought them.....
The sound is great - I like the horn like sound reinforcement by this kind of speaker placement. Easier than corner loading but still very efficient.
Read a lot about it on the Carlsson Website.
The sound is great - I like the horn like sound reinforcement by this kind of speaker placement. Easier than corner loading but still very efficient.
Read a lot about it on the Carlsson Website.