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Old 26th January 2013, 01:04 AM   #41
sebDIY is offline sebDIY  Belgium
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Quote:
The Mackie HD1502, a fairly small speaker on a stick using a 15" and 1" exit HF driver drops off only 1/6th octave above the MTH30.
Did you ever worked professionally in real conditions? I doubt !

How can you compared a dedicaced bass cabinet to fullrange? A bass cabinet makes more bass level, especially tapped horn compared to bass reflex, and bass cabinet can be put on the floor, not fullrange, so you gain. Bass cabinet is filtered in a small range of frequency, so you gain again. And level is what I need, I don't need to goes under 50Hz.

Trying to compare fullrange to bass cabinet is like comparing apples and oranges.

Any 15" fullrange I have tried (and I've tried a lot) can't outperform my system 2 MTH-30 + 2 ZX1 EV. This is for me, the best combination I have found in term of SPL, size, sound, weight.

Pearhaps for your use, you will need better than 50Hz cutoff, but for me it's perfect. My usage is professional not home, it makes big difference.

Remember what was the use in initial post:

Quote:
If it helps this (or these if I build two) are only going to be used for DJ applications, both indoors and out, for small gigs. I largely play somewhat downtempo as well as classic house music, if this helps understand my application.
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Old 26th January 2013, 02:19 AM   #42
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Originally Posted by sebDIY View Post
Any 15" fullrange I have tried (and I've tried a lot) can't outperform my system 2 MTH-30 + 2 ZX1 EV. This is for me, the best combination I have found in term of SPL, size, sound, weight.
To be clear, I'm trying to find the right compromise between the parameters of interest where physical dimensions and weight are the drivers. That said, I agree that there is more to this than just low extension, and further, that full range cabs aren't the right choice for me in much the same way that they aren't for you. Frankly, the ones that I like violate all of my weight/size restrictions and leave me less flexible for situations where I don't really need even that much extension. I have a small event next week, for example, where I'm only taking one powered top. We need some sound in a small room to demonstrate some DJ techniques for a meetup. It's events like these that drove me to buy two very small one-hand-carry powered speakers with two inputs on them. It makes for a five minute setup.
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Old 26th January 2013, 10:19 AM   #43
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Quote:
Originally Posted by ghettosynth View Post
Well, for me at least, I'm not "in the business", so to speak, it's a hobby. I specifically need something "one man" portable." If it's not easy to grab and go, I just won't take it. No 18" sub, and most 15" subs are not just grab and go for me.

Well, I'm still debating on what exactly that I'm going to do here, I'm fairly certain that I'm going to build at least one pair of small 12" TH subs.


tnx,
gs
The 15" ported daytons i posted earlier in the thread, i would put them up against any compact 12" tapped horn out there, and expect to get far better extension with similar max output.
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Old 26th January 2013, 05:02 PM   #44
tb46 is offline tb46  United States
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Hi,

Attached is a SPL comparison between a Dayton RSS390HO-4 in a bass reflex enclosure (V_net=2.5ft^3) 1W/4Ohm, and a B&C 12PS100 in the MTH30 @ 1W/6Ohm.

I would go with the MTH30 between those two. The MTH30 should be good to at least 160Hz.

Regards,
Attached Images
File Type: jpg MTH30_v_RSS390_SPL.jpg (29.9 KB, 127 views)
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Last edited by tb46; 26th January 2013 at 05:06 PM.
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Old 26th January 2013, 05:13 PM   #45
tb46 is offline tb46  United States
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Hi ghettosynth,

Post #40: "...trade off some SPL for LF extension in the THAM12 by just making the cabinet about 3 to 4 inches taller."

In Hornresp adding 10cm to the L23 dimensions makes very little difference.

Regards,
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Old 26th January 2013, 07:04 PM   #46
Djim is offline Djim  Netherlands
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Hi Oliver,

Maybe you should check the pressure minimum in relation to the response.
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Old 26th January 2013, 07:23 PM   #47
tb46 is offline tb46  United States
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Hi Djim,

I'm not sure what you mean, but I was just pointing out, that staying with the original design would be best.

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Old 26th January 2013, 07:43 PM   #48
Djim is offline Djim  Netherlands
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Sorry Oliver, my mistake. Had the wrong driver loaded.
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Old 26th January 2013, 08:16 PM   #49
tb46 is offline tb46  United States
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Hi Djim,

No problem.

Would the cone correction (throat correction) be applicable to the Tham series of THs?

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Old 26th January 2013, 08:36 PM   #50
Djim is offline Djim  Netherlands
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Hi Oliver,

The Tham-15 could benefit from throat and S4 area corrections. Haven't looked in the other designs from Martinson but since they look relative 'tiny' in the S2 and S4 areas (in relation to the driver and the cone-volume area's) it wouldn't surprise me they could use some optimation. I think it's a pity these designs (as for the MTH-30) never got the attention like the SS15 and TH18.
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