121 vs 122
Printed From: Speakerplans.com
Category: Plans
Forum Name: MT122
Forum Description: Discussion / Questions about the MT122
URL: https://forum.speakerplans.com/forum_posts.asp?TID=12375
Printed Date: 26 March 2026 at 10:12pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: 121 vs 122
Posted By: Blackmarket
Subject: 121 vs 122
Date Posted: 25 October 2007 at 7:17am
|
Hey hey So i've searched and I'm finding odd results... looking for views on a simple question. Is the MT122 worth it (some seem to think not) or is the 121 the way forward. Looking for cabs to form part of a PA that'll be used predominantely for house and techno. Also, suggestions on subs? Really dig the 1850 vibe, 4 per side minimum! Feedback appreciated, please send all derogatory/negative/useless comments to info@bbc.co.uk |
Replies:
Posted By: Disco Stu
Date Posted: 25 October 2007 at 10:48pm
|
Depends whats going on underneath - MT122 will get down to around 140Hz, MT121 probably more like 200Hz - if you need lower you either need a different mid top, or you need a good kickbin between the subs and tops.
Stu ------------- All you need to know is: Sensitivity + Power Handling - Power Compression = Max Output My acts: www.myspace.com/thebowiexperience www.myspace.com/scheisseelektronisches |
Posted By: Richard Hart
Date Posted: 26 October 2007 at 4:20pm
|
That's what I would have thought, but the recent shootout plots show the 121 to be capable of playing down to around 130 ish.
Edit: http://www.speakerplans.com/forum/forum_posts.asp?TID=11586&KW=mid+top - Link
|
Posted By: Disco Stu
Date Posted: 26 October 2007 at 11:19pm
|
Assuming that measurement was taken at 1W/1M it doesnt display the driver excursion so I cant be sure but I would suggest that below the bottom bump at 170 the driver excursion starts to go up quite rapidly
The average sensitivity in that area would cause me to cross it over at around 140
Either way - still a difficult frequency to reach with most wide bandwidth horn subs without colouration, its not a HUGE problem if you have the right bin
Stu ------------- All you need to know is: Sensitivity + Power Handling - Power Compression = Max Output My acts: www.myspace.com/thebowiexperience www.myspace.com/scheisseelektronisches |
Posted By: Heathrow_B_line
Date Posted: 27 October 2007 at 2:00am
|
measurements were indeed taken at 1W/1M ------------- Produce a killer sound. Take no prisoners. |
Posted By: Disco Stu
Date Posted: 27 October 2007 at 12:00pm
|
I think a better result would have been obtained 100W @ 10M Has anyone done an excursion plot for the MT121?
Stu ------------- All you need to know is: Sensitivity + Power Handling - Power Compression = Max Output My acts: www.myspace.com/thebowiexperience www.myspace.com/scheisseelektronisches |
Posted By: tb_mike
Date Posted: 31 October 2007 at 8:55pm
|
I agree stu, Important point. Excursion will increase greatly at cutoff,which you dont see on the SPL 1/w graph. Crossing higher would be sensible.Perhaps a mutation of the 121 single 12" with slightly longer path length is in order? |
Posted By: adambomb
Date Posted: 31 October 2007 at 11:04pm
|
I agree that the measurements should have been done at a greater distance.. then converted to 1w/1m for ease of comparison.
Should have been 2m/2w atleast... hindsight is a wonderful thing!
What I can say is all of the boxes on test that day took one channel of an ep2500 hitting it's limiter (light flickering most of the time) into 8ohms for over 10mins each... approx 300w... without any signs of harm... and for the most part sounded good doing it...
Never any hint of breaking up, over excusrion or distortion from the mt121... which was crossed (under Rog's instruction) at 140hz. ------------- http://www.freespeakerplans.com" rel="nofollow - www.freespeakerplans.com |
Posted By: Jhodas
Date Posted: 01 November 2007 at 12:26am
|
so 121s can play that low. nice. I smell a system... MT121s HD15s Scoops ouch.... ------------- Until the Lions have their own historians, tales of hunting will always glorify the hunter. |
Posted By: adambomb
Date Posted: 01 November 2007 at 9:14am
|
I well tried and tested system! That setup has been done before... but most would opt for X1s over scoops.
Are you SURE you want scoops?? ------------- http://www.freespeakerplans.com" rel="nofollow - www.freespeakerplans.com |
Posted By: adambomb
Date Posted: 01 November 2007 at 9:20am
|
hmm.. reading this thread again...
If your going for 1850s.. then I would build MT122... for the extra height and more balanced sound. ------------- http://www.freespeakerplans.com" rel="nofollow - www.freespeakerplans.com |
Posted By: norty303
Date Posted: 03 November 2007 at 6:05pm
|
The reason for building the MT121 was primarily due to size and weight considerations. They're not light in 121 format. It was then found that you didn't often need the second 12" in situations where it was dance music.
With HD15's underneath I struggle to see why you'd need the 2 12" drivers, especially as most mid/top boxes these days seem to make do with a single 12" and either small format cone driver or large format comp driver. ------------- My laser stuff: http://www.facebook.com/SubsonicSystems" rel="nofollow - Frikkin Lasers |
Posted By: Jhodas
Date Posted: 05 November 2007 at 4:33pm
Yup. It's the only way for dub! (well, it's the way I choose.) ------------- Until the Lions have their own historians, tales of hunting will always glorify the hunter. |
adambomb wrote: