Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Anarchy 7 - Wavecor MTM Crossover
Anarchy 7 - Wavecor MTM Crossover
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 17th January 2019, 06:48 PM   #11
phivates is offline phivates  United States
diyAudio Member
Join Date: Jan 2011
Location: Willamette Valley
That's an informed comment thank you.
  Reply With Quote
Old 18th January 2019, 04:47 AM   #12
norman bates is offline norman bates  United States
diyAudio Member
norman bates's Avatar
Join Date: Nov 2003
Location: iowa
yea, mtm's are kind of a love or hate thing.

My buddy said they sound like listening to music coming down a pipe.
I enjoyed a mtm setup with the rat shack lineaum tweet for a long while used in a theater setup.

And ideally (lol), the crossover point keeps a point source thing, or if you have 12" from top speaker frame across tweet to bottom speaker frame, you should not cross higher than 1.2khz, buuuuut good luck with that. Not impossible and there are some smaller rugged tweets now.

I couldn't tell you on 3rd or 4th order, but ideally I am a "time align" guy, so 6db or 24db with the tweet moved back usually.

And yes, a mtm would be an opportunity to make a .5 way for baffle step, but my ears prefer 2 drivers versus a 1.5 or 2.5 way when I was playing around with 4" full ranges run wide open or crossed 24db at 5khz. Once we get past obsessing with an expensive tweeter, we realize the midrange driver is as important, or don't spend $100 on a tweet and $20 on the midrange.

I think mtm is an option, even for 3 across the front, or tmm it for center to get that tweet up to the bottom of the tv.
  Reply With Quote
Old 18th January 2019, 09:19 AM   #13
ODougbo is offline ODougbo  United States
diyAudio Member
Join Date: Aug 2011
Location: Maryland USA
Oh had several mtm's disasters,,,they are gone now, some went in the fire pit.
The sound stage was crazy on some of them, more front to back movement than left to right; maybe a ploy for a two speaker HT, sound moving all over.

Plasnu, thanks for the link, will take a good look at that soon.
A lot going on AND a now have a xo design for the Wavecor, working on that today.....
  Reply With Quote
Old 18th January 2019, 10:22 AM   #14
wintermute is online now wintermute  Australia
just another
diyAudio Moderator
wintermute's Avatar
Join Date: Aug 2003
Location: Sydney
Anarchy 7 - Wavecor MTM Crossover
Whether or not the vertical lobing will be a problem depends a lot on how you intend to use them! If you walk around the room or stand then yes, probably an MTM is not an ideal choice. But if you will be sitting and have the tweeters at ear level then the lobing may even be an advantage (depending on what it is like).

I've seen people say they they use it to their advantage to remove floor and cieling bounce at the listening position. I've used a simulator Tolvan Data to try and work this out but because I don't know the math behind it, and the docco is sparse I've never been able to work out whether the CTC distance (for this particular tool) is M to T or M to M.

Any intelligence I may appear to have is purely artificial!
Photography (another hobby)
  Reply With Quote
Old 18th January 2019, 01:36 PM   #15
plasnu is offline plasnu  United States
diyAudio Member
Join Date: Jan 2011
Location: NY USA
One simple good test if your MTM working fine is, turn off the top M with correcting the bottom M level, and listen to it as MT. If you still prefer MT to MTM, something is wrong, or consider MTM would not be your speaker.
  Reply With Quote
Old 18th January 2019, 08:33 PM   #16
Zvu is offline Zvu  Serbia
diyAudio Member
Zvu's Avatar
Join Date: Jan 2009
Location: Belgrade
Most mtm bashing comes from poor designs that are, unfortunatelly, prevalent. Like bass reflex - 98% of what you could hear untill recently was very bad implementation and it earned bad reputation for entire loudspeaker concept. Every generalization leeds unavoidably into error.

Second thing, i never understood guys that have problems with vertical lobing. Sit your *** down and enjoy the music. Why all the jumping and walking - how can you hear and evaluate anything or even enjoy it. If it is background music, then you have no right to condemn a concept as bad sounding but only yourself for lack of knowledge about your listening habits and what are your needs.

Last edited by Zvu; 18th January 2019 at 08:38 PM.
  Reply With Quote
Old 19th January 2019, 11:14 AM   #17
ODougbo is offline ODougbo  United States
diyAudio Member
Join Date: Aug 2011
Location: Maryland USA
Great Success so far; a very powerful sounding speaker. Easy to forget they are 23" tall and no subwoofer, 3 make the house shake.
Used all the parts shown here: Denovo Audio Apollo MTM
Which is great deal anyway, wayyy less money than the parts can be bought separately.

Call me crazy but a big believer the BB ply, front port and 1/8" cork lining is an upgrade, e.g. the series drive resistor was too high; piggy-backed a another resistor which increased the tweeter level.

Last edited by ODougbo; 19th January 2019 at 11:25 AM.
  Reply With Quote


Anarchy 7 - Wavecor MTM CrossoverHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
The Renditions - An Anarchy TMM/MTM Build hongrn Multi-Way 73 26th November 2017 02:08 PM
Exodus Anarchy MTM gleite311 Multi-Way 13 8th May 2014 02:21 AM
Anarchy ODougbo Multi-Way 69 23rd August 2013 12:13 AM
EXODUS ANARCHY 6.5" DRIVERS taliesin60 Subwoofers 29 18th July 2013 04:26 PM
Anarchy sub lilmike bigfishe Subwoofers 1 14th October 2011 10:48 PM

New To Site? Need Help?

All times are GMT. The time now is 01:31 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio