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Old 20th April 2013, 07:33 PM   #811
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There should be nothing stopping someone from tipping the entire horn forward the 5 and then realigning the top and bottom as long as the internal details are kept the same.

dave
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Old 10th May 2013, 12:58 PM   #812
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Hi guy's, just got a valve amp and was wondering what tap you would recommend for the Mark Audio alpair 7 in the frugal horn, 4 or 8 ohm.
Think the spec says there 5.2, so a little confused.

Scratch
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Old 10th May 2013, 01:25 PM   #813
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Depends on the specific behaviour of the amp, and ultimately what you prefer. Try both if possible and see what you like more.
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Old 10th May 2013, 02:51 PM   #814
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Ok, thanks Scott.
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Old 10th May 2013, 04:20 PM   #815
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by mr scratch View Post
Ok, thanks Scott.
I doubt either will damage anything, and you may or not hear much difference.

Remember the single number listed on the spec sheet is DC resistance. Even the simplest graph of test sweep for T/S parameters will show the wide range of impedance with frequency.

In the case of the A7.3 the REVC = 5.4Ohm, but the impedance curve shows the peak at 70Hz of approx 35 Ohms, a minimum slightly higher than 6 Ohms ad at 300-400 HZ range, a fairly smooth rise that with minor resonant peak at 1500Hz, continuing to approx 12 Ohms at 40K.


Since any driver mounted in an enclosure may likely display different impedance characteristics from the test specs, and music is far more complex than any test signal, there will be few points at which the nominal "match" between any driver and any transformer coupled amp is "perfect" .
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Old 18th October 2013, 09:48 PM   #816
cbiern is offline cbiern  United States
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Am I doing it wrong somehow?
I'm laying out the pattern of the sides and using a measurement of 10 " from the top right edge and 17 11/16" over and 15mm up from the bottom I get a chord length of
35 5/8" instead of the specified 35 3/8". Does that " matter?
Thanks
Charlie
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Old 18th October 2013, 10:25 PM   #817
chrisb is offline chrisb  Canada
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already answered - in short, don't worry
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Old 25th December 2013, 05:40 PM   #818
Ebano is offline Ebano  Spain
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Hello to all members of diyAudio, I'm doing a frugel-horn mk3 and studying the plans do not understand why on FH3-2 plan for 18mm , the side panel is 194mm in the top and yet on page 10 the side pattern the top measure is 185mm...there is something wrong?
Regards.
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Old 25th December 2013, 07:40 PM   #819
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I will look into that.

dave
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Old 30th December 2013, 02:45 PM   #820
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Hi folks + seasons greetings

I have had my FH mk3s with fostex 126 for some time now and am very happy. But was wondering if a pair of drivers could be attached to the front baffle? Has this been tried? Would it be a good idea?
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