Search found 13 matches

by Ile
Tue 18 Jan 2011, 12:35
Forum: Sonab
Topic: OA12 renovering
Replies: 9
Views: 7320

Re: OA12 renovering

Jag vet diskant ta litet energi, men jag gissa de var litet mer än din simulationen. :D Jag också litat till IÖ/Hifikit dellist. Har du ta bort Panasonic WM-61A modul inre FET? Jag har Linkwitz modifierat WM-61A modul med han förförstärkare . Har bara provat gratis REW software. Har du mättat OA-12 ...
by Ile
Mon 17 Jan 2011, 12:38
Forum: Sonab
Topic: OA12 renovering
Replies: 9
Views: 7320

Re: OA12 renovering

Spolarna är originala (dock diskantspolen är modifierat till 0.4 mH). Jag också först planerat modifiering original diskantspolen, men jag tycker det är inte best alternativ. Original spol med 0.6 mm tråd tjockleken är planerat för 8 ohm (2x16) original diskanten, men nu diskant är 4 ohm (2x8) och ...
by Ile
Sun 09 Jan 2011, 23:02
Forum: Sonab
Topic: Felaktig vinkel på Obi T22 vid montering?
Replies: 5
Views: 2839

Re: Felaktig vinkel på Obi T22 vid montering?

Vinkel var rätt i min Obi, men jag måste montera obi så at magnet fell till gamla magnet sänkningen i min OA-12 baffeln. Om magnet är inte sänkat till baffeln, vinkel är felaktig. Jag måste borrar nya skruv hålen till baffeln för rätt stället. Obi är liten större än gamla diskant, du måste montera C...
by Ile
Sun 28 Nov 2010, 15:44
Forum: DIY
Topic: Sonab OA-12 rebuild project
Replies: 5
Views: 5458

Re: Sonab OA-12 rebuild project

Installed rubber c-strip to top grilles and now those fits fine and there is room for tweeters under grille. Been listening speakers now some time and these sounds just great for livingroom use. Mostly I use these for radio and tv, but also sometimes for movies and music since my theater/music room ...
by Ile
Mon 08 Nov 2010, 14:20
Forum: DIY
Topic: Sonab OA-12 rebuild project
Replies: 5
Views: 5458

Re: Sonab OA-12 rebuild project

I got speakers ready yesterday, sound pretty good. Might bee little too much treble though, tweeter crossover might need bit higher series resistors. Top grilles doesn't fit very good with new tweeters, some rubber c-strip might help to lift grilles to bit higher so that grilles aren't laying over t...
by Ile
Wed 03 Nov 2010, 09:52
Forum: DIY
Topic: Sonab OA-12 rebuild project
Replies: 5
Views: 5458

Re: Sonab OA-12 rebuild project

Modified crossover is bit higher than original, so some parts had only few mm gap to reflex port inside opening. Yesterday I lowered top baffle legs for crossover about 15 mm, so now air flow shouldn't be compromised.
by Ile
Tue 02 Nov 2010, 10:12
Forum: DIY
Topic: Sonab OA-12 rebuild project
Replies: 5
Views: 5458

Re: Sonab OA-12 rebuild project

Nice job! What kind of varnish? I like how full matt varnish look like. I guess it will looks lot like original Sonab varnish, but without dents and scratches. ;) So probably I use same full matt Helo speciallack like in my DIY speakers below, I might actually have it enough for two OA-12 in carage...
by Ile
Mon 01 Nov 2010, 14:31
Forum: DIY
Topic: Sonab OA-12 rebuild project
Replies: 5
Views: 5458

Sonab OA-12 rebuild project

Got Sonab OA-12 -73 pair from friend and I'm rebuilding these for livingroom speakers. Original bass drivers was swapped to some universal crap drivers at some point and two tweeters was missing and two was broken. So I ordered B65oa II, Obi T22-oa and crossover parts from Hifi kit. I also found out...
by Ile
Tue 26 Oct 2010, 00:01
Forum: DIY
Topic: Crossover Network Diagram for OD-11, OA-12, and OA-14
Replies: 8
Views: 7082

Re: Crossover Network Diagram for OD-11, OA-12, and OA-14

I diassembled old tweeter filters and measured bass filter components. Other bass inductor is 1.78 mH as it should, but other is only 0.6 mH. :x It must have internal short somewhere in wounds. 10 uF caps are within 10% tolerance, but have 8% difference between speaker. 2.2 ohm resistors are both sp...
by Ile
Sat 23 Oct 2010, 13:02
Forum: DIY
Topic: Crossover Network Diagram for OD-11, OA-12, and OA-14
Replies: 8
Views: 7082

Re: Crossover Network Diagram for OD-11, OA-12, and OA-14

Thanks for answer.

Do you know why OA-12 original tweeters are connected in phase, even crossover are second order?
Is it because there is two parallel connected tweeters or omnidirectional nature of speaker?