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Old 5th July 2011, 03:26 PM   #1
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Default And now for the FF165WK

Here are the measurements on a new pair of FF165WK's. The T/S specs are out-of-the-box. The RTA is with maybe 10hr.

I loaded the 165's in a pair of BR's that I had designed for the FE167E. The boxes are a bit big and tuned a bit low. I think that the ideal BR will be ~21L @45Hz. Anyway....

The new 165's have a sound very close to the old 167E's A bit firmer in the bass --note there is not BSC on the 165's. The bump @ 200Hz is probably baffle hump. The 165's are a bit sibilant as the FR would suggest. The only filter I see at this point is a low Q notch @4-7kHz.

I am pleased with the 165's They are drop-ins for the 167E's in my MLTL's where they sound better than the 166En's I forced into a modified MLTL. The highs are good enough for older ears, though the bat-eared will want a tweeter.

The FR traces are:
Black=0*
Red=15*
Blue=30*
Green=45*
Gray=Combined driver/port

Bob
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File Type: jpg First Specs.jpg (81.8 KB, 836 views)
File Type: jpg New FR.jpg (83.8 KB, 847 views)
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Old 5th July 2011, 09:34 PM   #2
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Looks good to me. Thanks for posting your results.
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Old 5th July 2011, 10:07 PM   #3
ra7 is offline ra7  United States
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Thanks for the measurements again Bob.

Why would say these are improvements over the FE167E? The treble looks fairly shouty.
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Old 27th October 2013, 04:08 AM   #4
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Hi Bob,as I am thinking of getting a pair of FF165 drivers,could please give me the notch filter values that work the best.Thanks,Leo.
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Old 27th October 2013, 08:48 PM   #5
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The best notch filter may be 30 degrees off axis.
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Old 28th October 2013, 02:24 AM   #6
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Right. You may want, no, you will want a BSC filter, but no notch. 30* may be a bit extreme, but somewhere around 15*.

Bob
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Old 29th October 2013, 11:36 AM   #7
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Quote:
I loaded the 165's in a pair of BR's that I had designed for the FE167E. The boxes are a bit big and tuned a bit low.
Hey Bob...do you think this may be why you are getting some sibilance out of them??
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Old 29th October 2013, 11:47 AM   #8
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Phase plugs will help. You do have a BSC filter on them, don't you? The FF165Wk's are much better in this regard, an most others too.

Bob
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Old 29th October 2013, 01:28 PM   #9
GM is offline GM  United States
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Quote:
Originally Posted by sideways View Post
sibilance
This is around an octave wide BW centered at ~6.7 kHz, so excessive peaking in the ~4.7 - 9.5 kHz BW is in theory to be avoided, yet many folks [though hardly all] find this adds a nice 'sharpness'/'inner detail' to many recordings depending on the type of signal chain combined with perceived tonal balance [flatness of response] at the listening position[s].

GM
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Old 29th October 2013, 01:48 PM   #10
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I don't own the 165's although I am considering them...

I own the 85's and find nothing wrong with them at all
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