MT122 (and 186 horn) processor settings
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Category: Plans
Forum Name: MT122
Forum Description: Discussion / Questions about the MT122
URL: https://forum.speakerplans.com/forum_posts.asp?TID=3296
Printed Date: 27 March 2026 at 3:29am
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: MT122 (and 186 horn) processor settings
Posted By: The Freak
Subject: MT122 (and 186 horn) processor settings
Date Posted: 13 December 2005 at 11:54am
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Hi all, After reading the reviews about the 186 horn and MT122 mid/top  we decided to build a single set (2 of each) to hear these ourselves. 2 x MT122 : - P.Audio SN-12B - P.Audio SD-750N - P.Audio PH2380 2 x 186 : - RCF L18P300 (8 Ohm) We are driving the speakers with : - 1 x Behringer EP2500 (2 x L18P300 bridged) - 1 x Behringer EP2500 (4 x SN-12B stereo) - 1 x Behringer EP1500 (2 x SD-750N stereo) - 1 x Behringer DCX2496 processor I know, it's Behringer, but that's a budget issue.  Now I would like to know the settings I have to make in the processor. What are the best crossover frequency's ? Low-Mid and Mid-High Are there any (free) tools I can use to measure the results ? Any other comments ? Will post some pics as soon as I make them. |
Replies:
Posted By: Fushion Julz
Date Posted: 14 December 2005 at 7:06am
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I have a similar set-up... My MT122s have: SN12B Beyma CP800Ti and my horns are PD1850 with the correct PD drivers I use a Void Infinte 8 for the bass and either BSS epc780s or QSC RMX2450s for mids and tops with processing through a Behringer DCX2496 I'd suggest a bit of trial and error, but I tend to use 130Hz ish for the bass/mid (L-R 48db/oct) and 1.9Khz mid/top (same slopes) PS: I'd also say that you need another 2 PD186 horns at least...The MT122s will keep up with at least 2 per side and probably do 4 per side given decent enough amplification. ------------- FUSHION SOUNDSYSTEM http://www.fushion.org.uk - www.fushion.org.uk |
Posted By: norty303
Date Posted: 14 December 2005 at 9:09am
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Blimey!! They're pretty steep slopes you use. I only use a 48 butterworth on my hi-pass for the bass. Do you struggle with running out of processing?
BTW, did you see that photo of us from Saturday? Clearly from the hand gestures it was taken whilst we were talking about those Ohm TRS212's!! (Have a look, you'll see what i mean ------------- My laser stuff: http://www.facebook.com/SubsonicSystems" rel="nofollow - Frikkin Lasers |
)Posted By: Fushion Julz
Date Posted: 15 December 2005 at 6:09am
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Processing power can be in short supply...But I only run the bass in
mono off channel 1 (which helps) and channel 4 runs the monitors
full-range from input C. This works fine...with all appropriate delays set, too, but when I use ch 4 for the mid-bass, then it can be in need of some tweaking to get it to work... ------------- FUSHION SOUNDSYSTEM http://www.fushion.org.uk - www.fushion.org.uk |
Posted By: The Freak
Date Posted: 15 December 2005 at 8:54am
And what delays did you use ? could you give me an example calculation ? |
Fushion Julz wrote:Posted By: Timber_MG
Date Posted: 15 December 2005 at 1:55pm
| Try a notch early in the stop-band and a boost at the crossover frequency, this buys you extremely high roll-off rates just below crossover and the processors take less resources using EQ than adding higher order filters. |
Posted By: Fushion Julz
Date Posted: 15 December 2005 at 7:48pm
From memory: The horn path length on the PD1850s is 2m The horn length of the 12" drivers is 600mm The horn length of the 2" compression driver is 400mm The horn length of the Selenium HB1505C1s is 900mm So the Seleniums are delayed 1100mm The 12" are delayed 1400mm The 2" comp driver is delayed 1600mm Don't hold me to that, I'll need to check to be 100% sure, but it sounds about right ------------- FUSHION SOUNDSYSTEM http://www.fushion.org.uk - www.fushion.org.uk |
Posted By: levyte357
Date Posted: 21 December 2005 at 9:55am
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I have done some research on the EP2500, and wouldn't recommend long term 4ohm bridge mode for sub, unless you are intending an unintentional barbecue If you can afford it, to start with I would recommend 1 EP2500 8 ohm bridge mode/186 horn. E.g £400 for 2x1300 @ 8 ohms. And when you have amassed enough ill gotten gains, upgrade to Void infinite-8. Any reason for RCF driver over PD186?.. "EVERYONE" I talk to, recommends PD186 in one box or another. And apparently, they sing quite nicely with above Berry setup. ------------- "Who am I? I'm the guy who does his job.. You must be the other guy". |
. My uses are real sub heavy RNB/dancehall recorded material, so may be more demanding than yours.Posted By: The Freak
Date Posted: 21 December 2005 at 11:37am
Thanks for the recommendation. We'll add another EP2500 to the rack. We went for the RCF because it was the easiest for us to get a hold of. |