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dbx Soundfield Ten

Hi, I'm looking for the x-over schematic or wiring diagram to the dbx soundfield ten speakers. The inward facing and outward facing mids are wired in reverse from each other, according to the markings on the x-over board. I like to verify that it is correct. Thanks



Re: dbx Soundfield Ten

Man, these things are really nutty. I just finished recapping and replacing all caps and resistors on the crossovers. I noticed the mids on one of the cabs had the double wire going to the opposite polarity to the other mid. So on the woofers, I used the white wire to +, and black wire to -; on the other woofer I used the black/black-white double wire to the +, and remaining wire (forgot color) to the -. This speaker seems to sound OK. I tried this wiring schemo on the other speaker, and I still have an issue with a popping sound when the bass is turned up a little. I thought it was one of the mids at first; so I disconnected it and still have the popping in the woofer. But the mid will pop too when reconnected. Or at least it sounds like it. The woofers are new Dayton Classic 10's I just bought. This is the third type woofer I have had in these cabs. I have re-capped the sfc-10 last year with panasonic electro's being careful with their polarity. Besides that, when I use my Advent Legacy's with this controller, THEY SOUND AWESOME! So I've discounted controller problems. There's got to be something going on the crossover of that one cabinet, or the mid is getting weak, or the wiring is different then what I have it currently. I don't know; they sure do take up a lot of time tho. If yours are sounding correct, I sure would like to see your wiring notes.

Re: dbx Soundfield Ten

I think you got it right, if , the inward facing woofers & mids are in phase and the out ward woofer & mids are out of phase.If the bass is real loud and boomy you have the all woofers & mid in phase . The popping sound could be DC getting to the woofer . Hows the DC offset of the receiver or amp your using ? Switch the speakers L to R ,R to L and see if the popping follows the speakers or it stays on the same channel . Check the wires mine had broken wire connectors , you need a good connection.
Be careful using using that controller with other speakers, don't they mention that in OM ?

Re: dbx Soundfield Ten

I never thought about the DC voltage getting to the woofers and causing the popping. I'm not sure that it's coming from the Marantz though. Here's what I've done so far:

1. I've reverse the spkr wires R-L, L-R. pse (problem/popping still exist)
2. I've changed the wires from spkr A to spkr B on the amp. pse

The woofers on both cabinets will pop with volume raised slightly above normal listening volume. Now, the Advent spkrs show no problems whatsoever, when run with the controller on or bypassed. THEY JUST ROCK. So apparantly the DC offset is OK. Whether I have both spkr A + B on or off, the Advent will sound the same, the DBX's will pop. Wire connections are fine. The DBX's are fused also; fuses aren't blown, so if it's DC, it has to be coming from inside the box on it's crossover (or is that possible)?

Maybe the Advents can handle the DC whereas the DBX's can't and it's fooling me. My next thought is trying another amp and seeing what happens. It's been a few years since I checked the old Marantz 2285b for offset voltages. And it's never been recapped. It just seems that I would experience the same problem in the Advents. I wouldn't worry too much about the Legacy's handling the controller. All the controller is, is an EQ that somebody did an excellent job wiring. The Legacy's light up and sound incredible. The bass is extended, and the mids and highs softly cushioned to please the most picky ears. Anything negative someone might have said about using the controller with other spkrs doesn't have much merit unless they can prove it on a bench. All I ever heard was someone mentioned this could be a problem from something they heard from someone else, which heard it from someone else, who heard it from someone else.... get the drift. I haven't seen anyone who actually tried the controller or tested the controller with another set of spkrs be whatever they are. Try it sometime, you might be surprised with what you hear. One more thought; the info on these SF-10s say they're 4Ω's. Wouldn't this make sense of the 8Ω spkrs being wired in parallel vs wired "out of phase" as you contend, which would put the woofers in series?

Re: dbx Soundfield Ten

I have another set of SF 10 crossovers . The markings on x-over board for the woofers are ,Green is Woofer 2, White is W 1 , and two wire (white with black ,and solid black) are W- (neg). The only thing now which is #1  , I would guess as #1 being the inward facing woofer ? I'll open mine up ...I have green on the negative of the outside woofer

Re: dbx Soundfield Ten

I never pay any attention to 4 ohm normal ratting ,I just recapped them. Is there enough wires for the woofers to be wired in parallel .I tried in phase and the bass was pounding. I will have to open mine up and take a lot. I can't find my notes. I think the + of the inside woofer went the - of the outside woofer . You did say recapped the controller ?

Re: dbx Soundfield Ten

I used the bi polar axial electrolytic cross over caps and Pioneer 12" woofers and VIFA D19TD-05 3/4" POLY DOME TWEETER(for the main one) from parts express . The inside speakers(woofer & mid) the ones that face each other do most of the work. The outside speakers (woofer& mid) are wired out of phase from them. The inside tweeter is the main and its different from the other 3 .I forget how the 4 tweeters were wired I think the inside one and the outside one are in-phase and the front and back one are out of phase . If you have never open them up you should be able to tell just be careful removing the stuffing . Also on mine some of the wire connectors to the drivers were broken.Good Luck

Re: dbx Soundfield Ten

You put a 12" speaker in a 10" hole? We must be talking about different speakers. I was looking for info on the DBX Soundfield Tens.

Re: dbx Soundfield Ten

No , they were drop in replacements. Its been a while I forgot the size . I talk to a guy that worked at dbx at the time these were made and he gave parts express link for the Pioneer woofers. Sorry for confusion .

Re: dbx Soundfield Ten

Thanks for the reply; the tweets haven't been disturb and wiring is intact. It's the woofers I really need the schemo for. I have my crossover out of one cabinet. I also made a list of caps and resistors. Where did you find that 600mfd 100vdc cap at? I didn't see anything like that at PE or anywhere else for that matter?

Re: dbx Soundfield Ten

If its 600uf caps I must have use two 300uf also. The outside woofers and mids are out of phase from the inside ones. Doesn't one wire off the inter woofer connect to the outer woofer's opposite terminal ? I didn't change the resistors .Are you going to recap the controller ? I'm looking for my notes I made

Re: dbx Soundfield Ten

I went ahead and ordered 4--300mfd caps to run in parallel to make up for the 600mfd cap. I wish I knew your color wiring diagram for the woofers. I'm not sure if they're wired in/out of phase off the crossover or not. How did you find that out? Do you have a service manual. I have the original instruction manual, but it doesn't come with any schematic.

Re: dbx Soundfield Ten

Hello, I need the speaker wiring diagram for the DBX soundfield 10's. Do you have a copy I could look at?

Thanks

Re: dbx Soundfield Ten

Correct,the woofers are also wired like that

Re: dbx Soundfield Ten

I never found a schematic . I got my pair back together correctly . Let me know if I can help

Re: dbx Soundfield Ten

Hi..I stumbled upon your post and suddenly realized I have a pair of these in my "storage room" aka garage!..One is complete and one needs the woofers and a mid. I also don't have the controller..I was at one time looking high and lo for the controller but gave up after a couple of months..I would really like to dig them out and try to re and re them..any advice/..Thanks!

Re: dbx Soundfield Ten

You need the controller ,their out there . The woofers are Pioneers I bought mine at Parts express. I talked to guy who work at dbx at the time and he told me the drivers and such were no big deal it was the cross over and controller. Recap the cross overs

Re: dbx Soundfield Ten

I believe I have a crossover issue in my old Soundfield 10's. What parts did you use? I too would like to have a schematic; I'm not sure if mine are wired correctly.

Re: dbx Soundfield Ten

Submitted by calman56 on June 18th, 2015.

The outside woofers and mids are out of phase from the inside ones. Doesn't one wire off the inter woofer connect to the outer woofer's opposite terminal ? I didn't change the resistors .Are you going to recap the controller ? I'm looking for my notes I made