It is a bit rich to quote Toole on this one thing and ignore his life's work, which is linking objective performance (on- and off-axis frequency response) to subjective listener preferences. I would much rather you admit that the A7 has flaws, but it is simple to build and can make you happy on a budget. There are reasons other than how they sound to play with full range drivers--fun, cost, simplicity, and an easy entry into DIY. I have built with several full range drivers, even with many Mark Audio drivers. They are fun to play with, but I'm not going to tell others that they are going to blow out other more neutral-sounding designs.
Nothing special?
I think the massive breakup at 1.5kHz, and the dip at 6.2kHz (cone shape?) are pretty special.
Add the fact that they drop like a brick at 12kHz, and that being on axis?
I thought I remembered seeing that FR response before, I wasn't sure where.
Good to know. Maybe why they are discontinued?
I was trying to be diplomatic. Biting my tongue.
Interestingly, Toole & Olive did significant studies showing that good measurements (plural) correlate well with a positive listening experience.
I think you may also miss the point. The frequency response measured above is horrid to say the least. There could be many reasons for that, the driver just being one of them.
Here are the measurements of the KEF LS50 for comparison:
Frequency response vs horizontal angle:
Waterfall:
Contour:
Full data set: 3D3A Lab at Princeton University
Tom
That seems to be one of the things Geddes says, sounds reasonable.
Listening tests with speakers that measure differently would be interesting.
Subjective Blind Testing of Fullrange Drivers by xrk971
Round 1:
A Subjective Blind Comparison of 3in to 5in Full Range Drivers - diyAudio
Round 2:
A Subjective Blind Comparison of 3in to 5in drivers - Round 2
Round 3:
A Subjective Blind Comparison of 2in to 4in drivers - Round 3 - diyAudio
Round 4:
A Subjective Blind Comparison of 2in to 4in drivers - Round 4 - diyAudio
Round 5:
A Subjective Blind Comparison of 2in to 3.5in drivers - Round 5 - diyAudio
Round 6:
http://www.diyaudio.com/forums/full...-blind-abx-test-enabled-ff85wk-round-6-a.html
And if you want to hear what different amplifiers sound like on same speakers...
Testing (virtual audition) of Amplifiers:
http://www.diyaudio.com/forums/solid-simple-quasi-mosfet-amstate/295286-virtual-audition-very-p.html
I just want to point out that regarding post #50, I think the FR is shown in the 1st image. I think a few comments were possibly made in response to the 2nd image which looks to me like a close mic measurement used for measuring HD. Please correct me if I'm wrong; just trying to help. Looks like some good work with the measurements, BTW.
. I think they sound good with EQ. Maybe not the best for extreme off-axis though.
Care to tell more? What were you expecting? Have you ever been overwhelmed by a 5" two way?
Haha yeah perhaps that is the issue and what you get with a 5". They sounded small even in a small space.
Some hours ago I listen to: Mahler - Symphonie Nr. 2 C-moll "Resurrection" with my loved KEF Q100 5.25" coaxial speakers, tweaked and modded by me.
Trust me, I cross over how such a small speaker is capable of playing an orchestral mass and with that dynamic!
For too long I have wanted to substantially improve my second system (electronics), but I have very clear that these little speakers stay with me.
Trust me, I cross over how such a small speaker is capable of playing an orchestral mass and with that dynamic!
For too long I have wanted to substantially improve my second system (electronics), but I have very clear that these little speakers stay with me.
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