ChrisCKidd

Tony, Sorry I didn't get back to you. My tweeters look like the ones at parts express more like the 270-041 I believe. The problem with substituting compression type drivers like k77 or t35a with that network is that I believe it will affect the system impedance if conventional 8 ohm drivers are wired in parallel as the piezos are wired in the original setup. Let me know how it works out if you can.

Hi, Tony Mine appear to be standard issue Motorola piezo tweeter horns available through MCM electronics and other similar suppliers. Does anyone have a closeup picture of the MMTM? I think I would much prefer these over the MTM's that I have, which currently need need replacement air choke coils for the crossovers and some of the piezos have reduced output so I'm thinking they should be replaced if I don't find a suitable alternative.

---------------- On 5/13/2003 8:51:27 PM j-malotky wrote: All I can say is HOLY CRAP. Some speakers you guys have!!!!! JM ---------------- NICE HT setup.I know the Khorns sound great with Macintosh. Did you build that center channel setup or modify the cabinets? I'm thinking of putting one together eventually with La Scalas. I've got two older pairs + one bottom section of a commercial La Scala. Looking out for the top. Right now I'm just using a sony receiver with an SEA (Southeastern Acoustics) 5.1 setup (5 two way satellites) and a 10" sub/yamaha power amp).Sony 1800 lumen projector. The alarm clock is a little cooler though: (2) heresys and (2)heresy IIs with a Marantz vintage 185 wpc receiver

---------------- On 5/13/2003 1:09:55 AM IndyKlipschFan wrote: Just a thought... With the clearity and safety of an electronic crossover today, capable of sending a clean signal of ONLY what you want to the enclosure.... Why would you not go this way? Look at THE DRIVE RACK system from Harmon/JBL,,, It is a all in one unit...Including other things you might be able to use too. Hope this helps! ---------------- Indy, You're right. The Drive Rack is impressive. Its a 1 x6 or 2x3 configuration I believe. The individual limiters on each out would definitely be a plus. I have experience with similar BSS units with other systems. The Ashly Crossovers I'm using now could be configured for Mono 5 way and there is a spare amp channel in each rack. It was easier to hook it up 4 way because of the 8 pin multi cable from the rack to each speaker stack. (Each rack has an Ashly crossover, Powersoft 4 channel amp and a Yorkville ARP 4040 2 channel amp. Each rack is never more than 20 feet from each stack ). The Klipsch brochure said that the MTM could be paralleled with the MSM and I just assumed that it picked up where the MSM's response rolled off, being limited only by the internal passive xover of the MTM. Guess I figured that adding an amp channel for a 30 watt piezo array might be guilding the lilly a bit. Would love to have 2 drive racks and have them remoted to FOH but I'd have to have another 10 channel snake for all the amp returns. Thanks for the suggestion. Chris

---------------- On 4/21/2003 8:54:50 PM woolygums wrote: I have a set of MCM 1900 with 4 MWM-S Split Cabs 2 MSSM Low Mids 2 MSM Fiberglass Horns 2 MTM Tweeters 2 M Network Crossovers Aluminum trim and fiberglas exteriors The tweeters have no output though when I check with a 1.5v battery at the tweeter terminals there is a sound. I hope that this is an accepted procedure. I have checked the fuses and everything seems ok. What would be my next step to get the tweeters going? Two of the MSM-S have badly water damaged speakers, but the cabinets are still good. I was wondering if there might be some way that I could install a new subwoofer speaker of some kind with an amp that could give me more bass thump? ---------------- Hi, Open up the MTM's and you'll find the Xover network . If yours are like mine the air choke (wire coil without the metal center) shorted out and is preventing the current from reaching the piezo tweeters. If you cut one end of this coil loose and the tweeters come on then you should replace the coil. I am trying to obtain info on this coil in the commercial forum on this bb.If you still have no sound then the piezos themselves might be damaged. I have the xover network too but have never used it with the system. Mine is Quad amped with a active crossover (I have 2 MWM duals and 4 MWM splits as well as the MSSMs, MSMs and MTMs). A replacement woofer is available through Klipsch. K 43E if I remember correctly. You could also experiment with Peavey Black widow. When I bought the first part of this system There were only 3 MWM splits so I copied the enclosure and bought a woofer for it. Adding the MWM duals - now there is bass for days.I actually wind up having to roll some of the bass out. I would suggest using an active crossover and dedicated amps. I have mine crossed at Low to 100 hz for the MWM duals, Low to 250hz for the MWM splits, 250hz to 600hz for the MSSMs and 600HZ to the top end for the MSM and MTM. The MTMs can be wired in parallel with the MSMs. If you don't want to use all these amps you could use a two way active crossover with 2 amplifier channels per side. You might find an amp with a crossover built in such as Mackie or a PV 2000 or CS- 800/1200 H. Anyway, connect the active crossover to the two amplifier channels and cross them over at 100 hz but in any event no higher than 250hz. The less low mids that the MWMs have to reproduce the better and tighter the bass will be. Also this will reduce unwanted resonances which can muddy the sound. The low side amplifier output connects directly to the MWMs and the high side amplifier to the type M balancing network and then out to MSSM, MSM and MTM. You can use a fairly powerful amp for the MWMs. However they are very efficient and do not require that much power. In parallel they present a 4 ohm load to the amp. I'm using a Yorkville 1200 watt amp for each pair of MWM woofers.It never breaks a sweat during most shows but the mid and high amps get a little warm. Hope that helps. Chris

Hi, I have a set of MCM 1900 PA Speakers.I have (2) MWM duals, (4 ) MWM Splits (2) MSSMs (2) MSMs and (2) MTMs. Quad amplified (2 amp channels per side for the MWMs, 1 for the MSSM, 1 for the MSM and MTM. XOVER: Low to 100HZ, Low to 250HZ, 250HZ to 600 hz, 600HZ to High Limit. A problem developed with the MTMs. Drove them just a little too hard. Their crossovers utilize an air core choke, an iron core choke, and a capacitor. The air core chokes over heated and should be replaced and also a couple of the piezo drivers seem to be not as loud as the others when I auditioned them individually. I'm considering replacing all of these so they'll match. Are these chokes available through the parts department or can someone tell me what the correct value is for these chokes? I think that the crossover point was designed for 6 khz. I figure that the piezo drivers are just standard motorolas and can probably be obtained through a parts house. Also I was wondering about locating some MMTMs which I believe was an alternative to the MTMs. The MMTMs supposedly were designed for longer throw applications and utilized either 2 or 4 compression drivers and either 1 or 2 horns per speaker stack. Could I obtain the correct compression drivers and horns and the balancing networks? I could build my own enclosures. Does anyone have any information or any pictures of these? The literature that I have mentions them but is more specific about the MTMs. Thanks for any help that anyone can provide. These speaker stacks still sound really good to me and the bass that the 15" s provide is incredible. I would just like to improve the top end with real compression drivers and horns versus the piezoelectrics. I have enjoyed and used Klipsch speakers since my 1st set of Heresys for 15 + years through 2 pairs of La Scalas and the MCM 1900s and a pair of KP 320's. The clarity and performance is simply unrivaled as far as I'm concerned.

Hello, I am interested in any information on the following used Industrial speaker systems that our production company has purchased: All of the cabinets except the high frequency box are triangular - shaped and have (3)15" LF driver (MWM Split), (2) 12 inch LMF driver (MSSM), (2) large scale horn / squawker (MSM) and (2) tweeter boxes which appear to have 5 Motorola piezo horns mounted in a small box. The connector plates have been re cut for 4 pin cannon speaker connectors so I am unable to read some of its information. The system also has (2) 2 space rack mountable crossover units which would allow one amplifier to drive each stack although I would think that the system would work better quad amplified. I would like the following information: Original production run dates. Approximate value/cost. Frequency response/ sensitivity/ nominal impedence/power handling specs. Coverage characteristics. Reccommended Crossover frequencies or the frequencies and slope of the passive crossovers. Also, now it is my understanding that the complete system should have 4 MWM Splits (2 per stack). Does anyone have one for sale or could I obtain a raw K-43e and possibly build my own matching enclosure (any plans available?). The system sounds good with just 2 MWMs but I hate to have the third one without using it. Thanks for any information that anyone can provide. Chris Kidd PS: I have no plans to trade my La Scalas, Heresy I's or Heresy II's. They all still sound great. This message has been edited by ChrisCKidd on 05-24-2001 at 10:46 PM