Members themightylloyd Posted June 20, 2004 Members Share Posted June 20, 2004 so i've got a poweramp that puts out 250 watts at eight ohms. I plut in two eight ohm moniters each rated at 200 watts in series. Do i have anything to worry about? Link to comment Share on other sites More sharing options...
Members tlbonehead Posted June 21, 2004 Members Share Posted June 21, 2004 Originally posted by themightylloyd so i've got a poweramp that puts out 250 watts at eight ohms. I plut in two eight ohm moniters each rated at 200 watts in series. Do i have anything to worry about? Well,of course not,that would be 16 ohms. Most amps are capable of running at 4 ohms/channel. Isn't yours? If so,I would certainly hook the two cabs up in parallel,not series. Link to comment Share on other sites More sharing options...
Members themightylloyd Posted June 21, 2004 Author Members Share Posted June 21, 2004 Originally posted by tlbonehead Well,of course not,that would be 16 ohms. Most amps are capable of running at 4 ohms/channel. Isn't yours? If so,I would certainly hook the two cabs up in parallel,not series. didn't have a long enough cord so i wouldn't be in danger of underpowering anything? Link to comment Share on other sites More sharing options...
Members tlbonehead Posted June 21, 2004 Members Share Posted June 21, 2004 Originally posted by themightylloyd didn't have a long enough cord so i wouldn't be in danger of underpowering anything? Well yes,if you need the volume,you are seriously undepowering the speakers. I thought you meant problems with impedence. You are probably only giving those speakers about 70-75 watts each,since the amp would be running at 16 ohms instead of 8. But I have a real hunch that you don't know the difference between series and parallel wiring. I'd bet money that you are running them in parallel. Can you explain your wiring? Link to comment Share on other sites More sharing options...
Members themightylloyd Posted June 21, 2004 Author Members Share Posted June 21, 2004 heheh, is the ignorance showing? i'm running the cable from the poweramp to a moniter, and another from that monitor across the stage to the other monitor. I'm pretty sure that's the definition of running it in series, right? parallel would be plugging both right into the poweramp? Link to comment Share on other sites More sharing options...
Members Zeromus-X Posted June 21, 2004 Members Share Posted June 21, 2004 Unless you re-wired the cabinets, they're running parallel right now. The monitor's inputs are daisy chained. If they're both 8 ohms, that means instead of two 8 ohm loads, the poweramp sees a single 4 ohm load when you connect them together. That's indeed parallel. Running in series is much more complicated; suffice it to say that you won't be doing it. If you run one on each side of the poweramp, that's running in stereo. One channel of poweramp into two monitors: parallelOne channel of poweramp into one monitor, the other into another: stereoTwo channels of poweramp simultaneously into the same load: bridged 99.9% of the time, anyway. Link to comment Share on other sites More sharing options...
Members themightylloyd Posted June 21, 2004 Author Members Share Posted June 21, 2004 well there goes everything i thought i knew thanks Link to comment Share on other sites More sharing options...
Members Zeromus-X Posted June 21, 2004 Members Share Posted June 21, 2004 Here's a little more technical explanation of what's going on with the series/parallel thing. Pop off the panel on one of your cabinets. You'll see that the two input jacks are wired together. So what, you ask? How else would it work? For the cabinets to be wired in series, the signal would have to go from the poweramp, into the first cabinet. At that point, it'd pass through the first two speakers, THEN back to the other input jack, to the second cabinet, and through its speakers. However, yours aren't doing that. The signal is hitting the first jack and then going to the speakers. However, it's simultaneously going to the second jack, out to the second cab, and to those speakers as well. They're both receiving the signal at the same time (or as close as is possible). Therefore, they're running with the signal in parallel. Does that help any? Series:[amp]------[cab1spk1]------[cab1spk2]------[cab2spk1]------[cab2spk2] Parallel:[amp]---+-[cab1spk1]------[cab2spk2][amp]---|[amp]---+-[cab2spk1]------[cab2spk2] Stereo:[amp]------[cab1spk1]------[cab1spk2]....|....+-------[cab2spk1]------[cab2spk2] Bridged:[amp]--+---[cab1spk1]------[cab1spk2]------[cab2spk1]------[cab2spk2]....|----|....+----+ Link to comment Share on other sites More sharing options...
Members lucho_84 Posted June 21, 2004 Members Share Posted June 21, 2004 man zeromus you really went all out on that example. very nice! i already understood the concept but always nice to look back and refresh and maybe offer help if needed, but obviously it's all under control. Link to comment Share on other sites More sharing options...
Members Zeromus-X Posted June 21, 2004 Members Share Posted June 21, 2004 No problem! Formatting stuff with vB is a bitch but hopefully it gets the point across. Link to comment Share on other sites More sharing options...
Members themightylloyd Posted June 21, 2004 Author Members Share Posted June 21, 2004 Thanks Zeromus! so is it not common practice for people to wire speakers in series? Link to comment Share on other sites More sharing options...
Members dboomer Posted June 21, 2004 Members Share Posted June 21, 2004 Originally posted by themightylloyd so is it not common practice for people to wire speakers in series? Right! If it has a 1/4" phone jack or a speakon connector it's in parallel. I've never seen any commercial system with series connections. It least nothing in the MI market. Link to comment Share on other sites More sharing options...
Members themightylloyd Posted June 21, 2004 Author Members Share Posted June 21, 2004 so why have i heard about it so many times? i here the phrase thrown around a lot, or it wouldn't be so firmly stuck in my head. either that or i'm insane. Link to comment Share on other sites More sharing options...
Members dboomer Posted June 21, 2004 Members Share Posted June 21, 2004 Can't help you there. Individual components INSIDE a cabinet may be wired in series or parallel or both but cabinet to cabinet they are parallel! Link to comment Share on other sites More sharing options...
Members agedhorse Posted June 21, 2004 Members Share Posted June 21, 2004 Originally posted by themightylloyd so why have i heard about it so many times? i here the phrase thrown around a lot, or it wouldn't be so firmly stuck in my head. either that or i'm insane. Just another modern myth Link to comment Share on other sites More sharing options...
Members Platy Posted June 21, 2004 Members Share Posted June 21, 2004 ...if you wire cabs in series does that mean the amp would see the 8 ohm load of one cab rather than the 4 ohm load of 2 (since the second cab is basically seen as an extension of the first)? Link to comment Share on other sites More sharing options...
Members dboomer Posted June 21, 2004 Members Share Posted June 21, 2004 Originally posted by Platy ...if you wire cabs in series does that mean the amp would see the 8 ohm load of one cab rather than the 4 ohm load of 2 (since the second cab is basically seen as an extension of the first)? It would see it as 8 AND 8 (16 ohms total) instead or parallel which would be 8 OR 8 (4 ohms total) Link to comment Share on other sites More sharing options...
Members tlbonehead Posted June 21, 2004 Members Share Posted June 21, 2004 Originally posted by themightylloyd so why have i heard about it so many times? i here the phrase thrown around a lot, or it wouldn't be so firmly stuck in my head.either that or i'm insane. Well series wiring is used quite often,mainly inside of cabs with multi speakers. And a lot of 4-speaker cabinets are wired in series-parallel,which is a combo of the two. If there is a specific reason why you would want to hook up a pair of cabs in series,you can easily make a little series adaptor "Y" cable Link to comment Share on other sites More sharing options...
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