I've got a set of MB Quart Musicomp MCX215 crossovers, 2- 4" woofers , and 2- tweeters.
The woofers have the following info on the back of them: QM130, 40-100w (cast into the basket), QM No 519850 (sticker), RSB 130 (sticker). There's also a sticker on the side of the basket that has 95 6915, Made in Germany, 5 98 4ohm. I checked the MB Quart website for info and came up empty handed. I'm guessing these are probably 10yrs old (5 98 = May 1998?)
On the crossovers I'm assuming the W+, W-, T+, & T- terminals connect to the woofers & tweeters. What do I connect to the INH+, INH-, INL+ & INL- terminals? These crossovers also have some terminals marked 0db, -1.5 db, -3db, -4.5db & -6db on the left side, and terminals marked biwire & standard on the right side.What do these do?
Replies (9)
swez on 06/11/2007 09:43:44
These sound like Biampable crossovers. (One amp channel for woofer, 1 for tweeter) This is also called "Biwiring" in some circles.
INH + = Tweeter + input from amp channel A
INH - = Tweeter - input ..............................
INL + = Woofer + input from amp channel B
INL - + Woofer - ......................................
The markings: 0db, -1.5 db, -3db, -4.5db & -6db are tweeter attenuation level options. They tone down the tweeter to match woofer output when not using the biamp feature (Normal setting)
The normal setting is used if you want non-biamped connections and only using 1 full range channel to drive both tweeter and woofer. I did find a little info on this crossover. It's crossed over at 2,500 Hz. It takes a pretty robust tweeter to handle much power at that crossover range. We generally find this in high end Comp sets only.
http://forums.bimmerforums.com/forum/showthread.php?t=115512
Does that help GH?
Swez
gearhead on 06/11/2007 10:34:00
So, which terminals would I use if I'm not bi-amping and I'm only using 1 full range channel to drive both tweeter and woofer,(jumpers set to Standard), INH, or INL?
swez on 06/11/2007 10:44:49
Use the "Standard" or "Normal" settings, not the biwire option here.
If your amp channel cannot handle 2 ohm loads, wire them, The crossovers) in series for a net 8 ohms. That is safe for most amps, but less power too. It would be better to have a 2 channel amp and run 1 set per channel.
Amp Pos... +C/O 1 -.....+C/O 2 - ... to amp channel Neg. This is a series config for these crossovers. The net ohmic load is ~8 ohms this way.
Got all that?
Swez COFFEE
gearhead on 06/11/2007 11:02:24
"Got all that?"
Uhhhhhhhhhhhh, no. GRIN
From my amp RF channel, to the crossover for the RF speakers (1 woofer, 1 tweeter), which terminals on the crossover would I connect the speaker wires from the amp to? I'll only have 2 wires, 1 positive speaker wire & 1 negative speaker wire. Would I connect these to the INH or INL terminals? (crossover jumpered to standard)
swez on 06/11/2007 11:27:30
Now I am confused GH... LOL
Can you draw me a diagram or shoot a picture out on what you have and intend to do? Then I can look it over and give you some options.
FYI: I find Power Point to be a very good tool for drawing diagrams and such. If you want to do it right, this is the best way I know how to do things of such complexity. Yes, it's time consuming, but a picture is worth many babbling words that neither of us may understand.
My e-mail is: swezdp@juno.com if you want to swap diagrams in .ppt format.
Swez COFFEE.... Snooze... Belch... fart... ooppps, not the farts but the poops.... GRIN
gearhead on 06/11/2007 11:40:51
What's Power Point? How do I use it? Etc.? I'm pretty cro-magnon when it comes to computer programs/software.
Never mind. My daughter is tutoring me on it.
swez on 06/11/2007 12:52:09
Power Point is part of Win XP office suites. It's a great program and very intuitive too. If you would like a sample of what can be done with PP, send me an e-mail and I'll pass a page onto you for review.
If you can make a sketch on paper and your daughter can then do the sketch in PP, then I can open it, edit and return it to you.
Swez
gearhead on 06/11/2007 14:07:59
Sketch is sent. Does it make sense to you?
swez on 06/11/2007 14:29:33
OK I got the diagram and it does make some sense. What I don't know about this crossover network, is how they suggest wiring in "Normal mode and not biwire mode. Is there a switch for selecting one or the other in this crossover set?
I can see the use of internal jumpers as one option or a manual wiring configuration while in the biwiring mode.
Can you take a few detailed pictures of the crossover and send via email. That would help. Otherwise, we'll have to wing it and test under low power to see if it works well.
Dave
PS I have a few errands to run now and will be out until late tonight too. It may be Tuesday before I can get back to you. :-(
The woofers have the following info on the back of them: QM130, 40-100w (cast into the basket), QM No 519850 (sticker), RSB 130 (sticker). There's also a sticker on the side of the basket that has 95 6915, Made in Germany, 5 98 4ohm. I checked the MB Quart website for info and came up empty handed. I'm guessing these are probably 10yrs old (5 98 = May 1998?)
On the crossovers I'm assuming the W+, W-, T+, & T- terminals connect to the woofers & tweeters. What do I connect to the INH+, INH-, INL+ & INL- terminals? These crossovers also have some terminals marked 0db, -1.5 db, -3db, -4.5db & -6db on the left side, and terminals marked biwire & standard on the right side.What do these do?
Replies (9)
swez on 06/11/2007 09:43:44
These sound like Biampable crossovers. (One amp channel for woofer, 1 for tweeter) This is also called "Biwiring" in some circles.
INH + = Tweeter + input from amp channel A
INH - = Tweeter - input ..............................
INL + = Woofer + input from amp channel B
INL - + Woofer - ......................................
The markings: 0db, -1.5 db, -3db, -4.5db & -6db are tweeter attenuation level options. They tone down the tweeter to match woofer output when not using the biamp feature (Normal setting)
The normal setting is used if you want non-biamped connections and only using 1 full range channel to drive both tweeter and woofer. I did find a little info on this crossover. It's crossed over at 2,500 Hz. It takes a pretty robust tweeter to handle much power at that crossover range. We generally find this in high end Comp sets only.
http://forums.bimmerforums.com/forum/showthread.php?t=115512
Does that help GH?
Swez
gearhead on 06/11/2007 10:34:00
So, which terminals would I use if I'm not bi-amping and I'm only using 1 full range channel to drive both tweeter and woofer,(jumpers set to Standard), INH, or INL?
swez on 06/11/2007 10:44:49
Use the "Standard" or "Normal" settings, not the biwire option here.
If your amp channel cannot handle 2 ohm loads, wire them, The crossovers) in series for a net 8 ohms. That is safe for most amps, but less power too. It would be better to have a 2 channel amp and run 1 set per channel.
Amp Pos... +C/O 1 -.....+C/O 2 - ... to amp channel Neg. This is a series config for these crossovers. The net ohmic load is ~8 ohms this way.
Got all that?
Swez COFFEE
gearhead on 06/11/2007 11:02:24
"Got all that?"
Uhhhhhhhhhhhh, no. GRIN
From my amp RF channel, to the crossover for the RF speakers (1 woofer, 1 tweeter), which terminals on the crossover would I connect the speaker wires from the amp to? I'll only have 2 wires, 1 positive speaker wire & 1 negative speaker wire. Would I connect these to the INH or INL terminals? (crossover jumpered to standard)
swez on 06/11/2007 11:27:30
Now I am confused GH... LOL
Can you draw me a diagram or shoot a picture out on what you have and intend to do? Then I can look it over and give you some options.
FYI: I find Power Point to be a very good tool for drawing diagrams and such. If you want to do it right, this is the best way I know how to do things of such complexity. Yes, it's time consuming, but a picture is worth many babbling words that neither of us may understand.
My e-mail is: swezdp@juno.com if you want to swap diagrams in .ppt format.
Swez COFFEE.... Snooze... Belch... fart... ooppps, not the farts but the poops.... GRIN
gearhead on 06/11/2007 11:40:51
What's Power Point? How do I use it? Etc.? I'm pretty cro-magnon when it comes to computer programs/software.
Never mind. My daughter is tutoring me on it.
swez on 06/11/2007 12:52:09
Power Point is part of Win XP office suites. It's a great program and very intuitive too. If you would like a sample of what can be done with PP, send me an e-mail and I'll pass a page onto you for review.
If you can make a sketch on paper and your daughter can then do the sketch in PP, then I can open it, edit and return it to you.
Swez
gearhead on 06/11/2007 14:07:59
Sketch is sent. Does it make sense to you?
swez on 06/11/2007 14:29:33
OK I got the diagram and it does make some sense. What I don't know about this crossover network, is how they suggest wiring in "Normal mode and not biwire mode. Is there a switch for selecting one or the other in this crossover set?
I can see the use of internal jumpers as one option or a manual wiring configuration while in the biwiring mode.
Can you take a few detailed pictures of the crossover and send via email. That would help. Otherwise, we'll have to wing it and test under low power to see if it works well.
Dave
PS I have a few errands to run now and will be out until late tonight too. It may be Tuesday before I can get back to you. :-(
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