#15438 - 09/29/05 09:06 PM
BiAmping front speakers
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Deputy Gunslinger
Registered: 09/29/05
Posts: 8
Loc: Wa
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Hello, I have a 950 and a gaggle of m200's. I want to try some new L/R front speakers that require BiAmping. How do I split the front channels into 2 channels each? The speakers have the crossovers so all I need is a full signal the the woofer side and the same to the tweeter side of each speaker. Will a simple y-interconnect work between the 950's output and the 2 x m200's inputs? Thanks soo much. I am sill fairly new to any kind of Hi-End audio.
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Mitsubishi Diamond 65" RPTV, Onkyo TX-NR5007, B&K 5 ch Amp, Fronts Speakercraft Starlet 9's, Ctr Martin-Logan Theatre, Side surr. Mirage OMD5's, Rear Surr. Speakercraft Aim 8's, SVS SB12plus Subs.
Comforting the Afflicted, Afflicting the Comfortable
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#15440 - 09/29/05 09:37 PM
Re: BiAmping front speakers
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Gunslinger
Registered: 02/06/05
Posts: 41
Loc: L.A.
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Technically speaking, since your speakers have internal crossovers, they don't require bi-amping. The very simplest thing to do is to wire the Low Frequency and High Frequency terminals together (LF- to HF-, LF+ to HF+).
[EDIT: This is usually true, but not this time -- these speakers don't contain ALL of the things usually found in a crossover. Moral: Read the manual, and take anything some yahoo like me says on the internet with a grain of salt!]
However, if you've already got the M200s to spare, you can drive LF with one and HF with the other. Just put a Y on the 950 output and run the same signal to the input of each M200. This is "passive bi-amping" since you retain the passive crossover in the speaker.
You may want to consider trying "active bi-amping," which is the same except the speaker crossovers are removed, and an electronic crossover placed between the 950 and the M200s.
My experience -- this year, I altered my speakers to try passive bi-amping, then altered them again to try active bi-amping. I used the two spare channels of my 7100 amp. Passive bi-amping was almost identical to mono-amping for me, and I doubt I could tell the difference in any realistic listening scenario. Active bi-amping, on the other hand, made a dramatic difference; well worth the effort. Of course, your mileage and opinions may vary.
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#15442 - 09/29/05 11:07 PM
Re: BiAmping front speakers
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Deputy Gunslinger
Registered: 09/29/05
Posts: 8
Loc: Wa
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More info: I am trying out the Speakercraft Starlet 6's. It says it needs 2 amplifiers and has 2 inputs on different ends of the speaker,one named tweeters for the 6 ribbon tweeters and one named woofers for the 6 woofers.I hope this helps.
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Mitsubishi Diamond 65" RPTV, Onkyo TX-NR5007, B&K 5 ch Amp, Fronts Speakercraft Starlet 9's, Ctr Martin-Logan Theatre, Side surr. Mirage OMD5's, Rear Surr. Speakercraft Aim 8's, SVS SB12plus Subs.
Comforting the Afflicted, Afflicting the Comfortable
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#15443 - 09/30/05 12:06 AM
Re: BiAmping front speakers
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Desperado
Registered: 03/21/01
Posts: 14054
Loc: Memphis, TN USA
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This does help - we are dealing here with an unusual speaker . It does indicate that separate amps are required for the ribbons and the cones, which makes me suspect that there may be a reason why bi-wiring or jumpering may not work in this case. The y-adapter split on the let and right pre-amp outputs would work fine for this. My only concern is about the mention of requiring gain adjustment on the amp channels (something that, if they are referring to the same thing I'm thinking of, I don't recall the M200 having).
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#15444 - 09/30/05 12:53 AM
Re: BiAmping front speakers
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Deputy Gunslinger
Registered: 09/29/05
Posts: 8
Loc: Wa
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Rats, I think you are correct gonk. So, now I need to look for an inexpensive pair of stereo amps with seperate gain ctrl's or a 4 channel of similar specs, before I can even try these out. Thanks for catching that. I will return with an update after the above acquisition!!!
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Mitsubishi Diamond 65" RPTV, Onkyo TX-NR5007, B&K 5 ch Amp, Fronts Speakercraft Starlet 9's, Ctr Martin-Logan Theatre, Side surr. Mirage OMD5's, Rear Surr. Speakercraft Aim 8's, SVS SB12plus Subs.
Comforting the Afflicted, Afflicting the Comfortable
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#15445 - 09/30/05 01:29 AM
Re: BiAmping front speakers
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Deputy Gunslinger
Registered: 09/29/05
Posts: 8
Loc: Wa
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HELLO again, any ideas on what amp(s) might have gain adjustments on them. My m200's were such a deal but it appears they just won't work here.
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Mitsubishi Diamond 65" RPTV, Onkyo TX-NR5007, B&K 5 ch Amp, Fronts Speakercraft Starlet 9's, Ctr Martin-Logan Theatre, Side surr. Mirage OMD5's, Rear Surr. Speakercraft Aim 8's, SVS SB12plus Subs.
Comforting the Afflicted, Afflicting the Comfortable
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#15447 - 09/30/05 11:09 AM
Re: BiAmping front speakers
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Gunslinger
Registered: 02/06/05
Posts: 41
Loc: L.A.
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Hmm, those are interesting speakers... Oddly, the similar but smaller Starlet 4 doesn't need separate amps. I'm guessing the big ribbons on the Starlet 6 simply make a difficult load, impedance-wise, and most amps can't handle them plus the woofers at once. I have a feeling that an M200 might be tough enough, but not sure. Usually the internal crossover deals with level-matching between tweets and woofs. Sometimes it's selectable for personal taste, but requiring amps to do so is unusual. You might take a look at pro amps. QSC is one such that provides amps with variable gain controls. I'm sure there's others. In my system, the active crossover (a Behringer DCX2496) also provides selectable level matching, among other things. There are ways to do it. Cool speakers!
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