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Old 29th September 2012, 05:55 AM   #31
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forget about the sub and just buy another pro5100, you will get better bang for your buck.
What makes a good speaker great is not low frequency response, it is transient response in the region of 40Hz to 200Hz. This is where a lot of music falls that is difficult on speakers. That is why I suggested dual gpa 416, not because they are cheaper, but because it will sound better.
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Old 29th September 2012, 06:12 AM   #32
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I already have another Pro 5100 here (I bought two at the same time) only problem is impedence. To run both of the same input I would need to run them at 2ohm or 8ohm. Only other option is to split the output and run it on the other channel of the amp at 4ohm.

I dont want to go putting the cart in front of the horse, I haven't even tried them in a baffle of any kind yet. So I could potentially get significant gains once I do that... kick up the woofer crossover by a few dB and we could be looking at a whole different ball game.
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Old 29th September 2012, 06:24 AM   #33
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Yeah. No rush. Take your time.
The woofers you have are very good. As soon as I saw "underhung" motor I knew they were going to be special.

GPA416 also uses underhung voice coils

Last edited by Murphys Law; 29th September 2012 at 06:27 AM.
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Old 29th September 2012, 08:00 AM   #34
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EQ it then run full range pink noise.

I have a pair of AE IB12s a side and they produce major cone movement when run full range. Roll them off at 40Hz and they barely move.
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Old 29th September 2012, 10:17 AM   #35
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Why can't you run your mids down to 200Hz?
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Old 29th September 2012, 10:24 AM   #36
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While on paper they look like they should do that, they sound thin down in those frequencies. The size of the cone is just too small. They may be ok in a sealed box to lend a hand but in free air its a different story.
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Old 29th September 2012, 10:28 AM   #37
Rudolf is offline Rudolf  Germany
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Just trying to remove some guesswork from the discussion. This is a simulation of the Goldwood 18" driver in H frame as propagated by MJK:
H frame Goldwood GW 1858.gif

The upper diagram is showing the driver excursion in mm. The Goldwood is very well behaved in how he limits itself below 30 Hz. Most other woofers excursion will literally go through the roof with some SPL near 20 Hz. It is always a very good idea to apply a steep high pass at 20 Hz to prevent a dipole woofer from exceeding its excursion limit.
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Old 29th September 2012, 10:28 AM   #38
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Once you have it eqd it won't sound thin.
I bet if you put it on a baffle 55cm wide it won't sound thin
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Old 29th September 2012, 10:29 AM   #39
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Quote:
Originally Posted by Rudolf View Post
It is always a very good idea to apply a steep high pass at 20 Hz to prevent a dipole woofer from exceeding its excursion limit.

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Old 29th September 2012, 10:33 AM   #40
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Quote:
Originally Posted by Rudolf View Post
Just trying to remove some guesswork from the discussion. This is a simulation of the Goldwood 18" driver in H frame as propagated by MJK:
Attachment 303902

The upper diagram is showing the driver excursion in mm. The Goldwood is very well behaved in how he limits itself below 30 Hz. Most other woofers excursion will literally go through the roof with some SPL near 20 Hz. It is always a very good idea to apply a steep high pass at 20 Hz to prevent a dipole woofer from exceeding its excursion limit.

Any chance you could please model the same thing with these driver specs? Has plenty of XMax as you can see...
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File Type: jpg Tc Sounds Pro 5100.jpg (187.8 KB, 82 views)
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