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RCF Club15 MB15ND501

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bivan84 View Drop Down
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    Posted: 20 September 2016 at 7:28pm
I have built a RCF Club 15, loaded with MB15ND501 and a ND650 horn.

RCF Club 15

In your opinion, the RCF MB15ND501 could be suitable for this application? The woofer is brand new and I don' t know if I get poor low end because it is new or because is not the right one.

Thanks.
Ivan.

https://youtu.be/S8sT_gFbARU

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outkast View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote outkast Quote  Post ReplyReply Direct Link To This Post Posted: 20 September 2016 at 10:26pm
The recommended driver for the Club 15 is RCF L15P540 which is a low frequency driver - the "L" in the model number indicates that. I'm not familiar with the MB15ND501 but the "MB" in the model number indicates that it is a mid-bass driver. So if you want to use this box full range then the MB15ND501 is the wrong driver, though it would probably work ok if used as a mid-top with a sub under it.
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bivan84 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bivan84 Quote  Post ReplyReply Direct Link To This Post Posted: 21 September 2016 at 12:22pm
Thanks for the answer!
I see that this cab needs a 6 Db boost on 60hz. I thought that this was a waste of amp dynamic.
Also, the low Power version of this project is equipped with l15l530, which is not a proper woofer.
RCF uses the mb15nd501 in the ART425A...
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DMorison View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMorison Quote  Post ReplyReply Direct Link To This Post Posted: 21 September 2016 at 1:41pm
Originally posted by bivan84 bivan84 wrote:

I have built a RCF Club 15, loaded with MB15ND501 and a ND650 horn.

RCF Club 15

In your opinion, the RCF MB15ND501 could be suitable for this application? The woofer is brand new and I don' t know if I get poor low end because it is new or because is not the right one.

Thanks.
Ivan.

https://youtu.be/S8sT_gFbARU

 
It's not an off the shelf driver, so unless you can provide a datasheet with the TS parameters, we probably can't give you any hard info. Other than it having been used in a discontinued product, do you have any more info on it please?
Cheers,
David.
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bivan84 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bivan84 Quote  Post ReplyReply Direct Link To This Post Posted: 21 September 2016 at 7:05pm
Hello.

THIELE/SMALL PARAMETERS
  • Resonance frequency:48 Hz
  • DC resistance:5.8Ω
  • Mechanical factor:4.6
  • Electrical factor:0.39
  • Total factor:0.37
  • BL Factor:19.2 T · m
  • Effective Moving Mass:90 g
  • Equivalent Cas air load:134 liters
  • Effettive piston area:0.086 m²
  • Max. linear excursion (mathematical):6.0 mm
  • Voice - coil inductance @ 1kHz:0.9 mH
  • Half-space efficiency:3.70%
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DMorison View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMorison Quote  Post ReplyReply Direct Link To This Post Posted: 21 September 2016 at 8:10pm
Originally posted by bivan84 bivan84 wrote:

Hello.


OK, would have been better to say that in your first post instead of using a different model number.
It models well enough in what I can guess the cab volume and tuning to be (85l tuned to about 45Hz) - it should have -3dB about 57Hz and -6dB about 45Hz, so pretty respectable for a 15" 2 way.
I assume that's without putting in any EQ to the low end?
Your video doesn't sound badly lacking in bass, so I don't think there's a problem.
If you want to be sure, getting any of the measurement programs like REW and doing proper measurements (outdoors, on the ground, well away from any structures that would cause reflections) would be the best way of finding out for sure.
Good luck,
David.
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bivan84 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bivan84 Quote  Post ReplyReply Direct Link To This Post Posted: 23 September 2016 at 9:33pm
Thanks for your answer.
Now the woofer sounds better: after a copule of hours of burn-in, he sound is more fat and full in the low region.
What kind of eq I should use on the bass, without sacrifing amplifier power?
In the video I was applying some bass eq, I think 3 or 4 db 2 octave at 60 hz. It's ok doing this?
Ivan.
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Steve20131 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve20131 Quote  Post ReplyReply Direct Link To This Post Posted: 23 September 2016 at 9:53pm
8-10 hours till diaphragm & spider loosens

..even if it's wrong Tongue


Edited by Steve20131 - 23 September 2016 at 9:58pm
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