Frequency: 90 to 15KHz

Enclosure Type: Horn Loaded midtopalt

Size: 1030x600x388mm

Recommended Drivers:  SN12B12ND710 or 12PE32 

Plan: SMT212


Designer: Stipe Ercegovic (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Cubo15's Avatar
Cubo15 replied the topic: #24032 3 years 4 days ago
If you would cross the SMT212 somewhere between 100 and 200 Hz, the 12p80nd would have it's benefits. The 12MI100 is simply not made to be used below 200 - 250 Hz but as you say it's going to start there anyway. It's the little things like the aluminium VC and the 2nd and 3th HD, that makes me think the 12MI100 is the easiest choice here. If you ever intent to cross below 200 Hz, ever, the 12p80nd.

Best regards
Old Qua's Avatar
Old Qua replied the topic: #24022 3 years 1 week ago
Hi I am planing on building a pair of these SMT 212.
The thing is that I can´t decide between Beyma 12mi100 or 12p80nd for the midrange drivers.
Is the 12p80nd worth the extra money? How big an advantage dos the 12p80nd have over the 12mi100
- when it comes to sound quality?
- when it comes to max SPL?

Also, will 2 12p80nd working together corse less phase problems than 2 12mi100 working together?

I am planing to use the SMT´s from about 200-250 HZ and up.
unclejam's Avatar
unclejam replied the topic: #23902 3 years 3 months ago
:ohmy: these things are intense! Great Design
unclejam's Avatar
unclejam replied the topic: #23770 3 years 5 months ago
Coming along real nice like. gonna have 4 of these bad boys.
ricosound's Avatar
ricosound replied the topic: #23761 3 years 6 months ago
Hi All...I'm building 2 of the SMT 212 but in a single 12" driver version.

At the moment I am designing the plan to cut all the panels

I was wondering if the the 12" driver and the comp driver should be vertically aligned or if a configuration like the attached sketch is fine ( where dark blue 12" driver sits at the back part of the cabinet and the purple comp driver + horn sits a bit forward - drivers are not aligned in this case )
sketch is based on the measures of 18sound 12mb700 12" mid bass driver and Compression P Audio BM-D750 Serie 2 with Horn P Audio PH-3223
This will determine the width/position of the horn baffle.
From other build I've seen on the web it seems that they are not vertically aligned but before I cut the wood I wanted to make sure I am not making any mistake

thank you for any advice !
sn95's Avatar
sn95 replied the topic: #23674 3 years 7 months ago
Nice looking
BennyBoyNat's Avatar
BennyBoyNat replied the topic: #23664 3 years 7 months ago

I have built 1 of these so far with a single 12 beyma sm112n a beyma 605nd(6.5") and beyma CD10Fe. I have the drivers to build 3 more although I need to get the three other 605nd's reconed. Will post build pics when I find them or take more when I build the next one
dyl's Avatar
dyl replied the topic: #23622 3 years 8 months ago
Hi there. My take on the smt212 with a panel between the 12" drivers. Loaded with 18sound 12nd710 and bms 4550
unclejam's Avatar
unclejam replied the topic: #23619 3 years 9 months ago
Hey guys I'm purchasing wood for 4 Smt 212's how many sheets of ply do I need?
m0gsia's Avatar
m0gsia replied the topic: #23236 4 years 5 months ago
Hello Everyone,

Does anyone know the maximum frequency response of the 12" section as a single? I was hoping to use them from 200-1.4khz

pankydar's Avatar
pankydar replied the topic: #22835 5 years 1 month ago
I need soft copy design bass reflector 15" woofer... anybody help
steeljim11's Avatar
steeljim11 replied the topic: #21735 6 years 1 month ago
I need plans for a single 12" cabinet.
Ollie_N's Avatar
Ollie_N replied the topic: #21692 6 years 2 months ago
Hi Everyone,

just wondering would this design work well with any 12" fane drivers

i.e 12mbn and 12bmn?

Many Thanks

COZY PILLOW replied the topic: #21685 6 years 2 months ago
I have the PDN12MH25's in SMT212's and they are amazing with 2" Fane CD280's and when I used 2 of them at a marquee event last year the Police had a report from someone complaining about noise pollution nearly 7 miles away. I honestly did not believe the officer when he approached us at the end of the night? I laughed it off as a joke. He could not believe it either until he had stood in the persons garden and he could hear it for himself. I have 4 SMT's and I would highly recommend everyone to try them. , :blush: sorry guys ihad the wrong model number of the 12" drivers originally. My bad. oops! :blush:
weloveit's Avatar
weloveit replied the topic: #21683 6 years 2 months ago
should i use the PD12SB30 or the PD 123ER?
gfoster's Avatar
gfoster replied the topic: #21551 6 years 4 months ago
any news on this? I am looking to build them as a single driver unit, however has anyone built them to take a top hat for poll mounting them?

what drivers are best?

jamieb's Avatar
jamieb replied the topic: #20583 6 years 10 months ago
Can you explain the nature of the phasing problem please?
king tubby's Avatar
king tubby replied the topic: #20576 6 years 10 months ago
Hi guys. I am building the full size SMT212. I was wondering about the size of the panel, labeled "H". Would that be sufficient enough to block the phasing problem, between the two twelve inch mids
anjmoor's Avatar
anjmoor replied the topic: #20090 7 years 2 months ago
Gonna build one of these next week as a single but with slight adjustment to height for hf panel, I am going to make it smaller in height and fit a different horn to the one shown in pics here, also I am going to test it with the p-audio 200 watt 12" driver and a 1" p-audio cd , may build 4 of these to finish off my small rig
anjmoor's Avatar
anjmoor replied the topic: #18872 7 years 11 months ago
do we have anything new on this topic? anyone built and tested? only asking as I may build a pair of these to sit on top of a cubo 15 with an es-15 on the cubo and this design should get the hf up high enough
deejay skillz's Avatar
deejay skillz replied the topic: #18789 8 years 5 days ago
Hi there, is it possible to use any emminence driver, lets kappa pro 12 and is it possible to have a single driver version of the same! In my country , got acees to RCF and Emminence drivers..
anjmoor's Avatar
anjmoor replied the topic: #18656 8 years 1 month ago
Looking forward to reading about how you think these sound, looking at them as a single I wonder if they could be adapted to take a single 15" as the single 12 in comparison to the HF horn asthetically looks out of proportion. Please do not take that as a put down, I am only a complete and utter novice when it comes to speaker building lol. I would have no idea how to re evaluate all the mods needed for this cabinet to be designed around a 15 but in doing so would this even be possible?
cravings's Avatar
cravings replied the topic: #18642 8 years 1 month ago
haven't actually used them yet at all! been rushed off my feet with stuff. any day now i'll have a play with them. i'm hoping they'll be nicer than the mts for smaller rooms / inside setups.

what's happened my image links?
AOIAUDIO replied the topic: #18633 8 years 1 month ago
cravings, how would you say these compare to MT121s?
cravings's Avatar
cravings replied the topic: #18201 8 years 2 months ago