http://www.6moons.com/audioreviews/firstwatt/firstwatt_3.html
Am I missing something when a 100$ Fostex driver measures so much better then a 1700$ Lowther? Please forgive my ignorance.
Am I missing something when a 100$ Fostex driver measures so much better then a 1700$ Lowther? Please forgive my ignorance.
http://www.6moons.com/audioreviews/firstwatt/firstwatt_3.html
Am I missing something when a 100$ Fostex driver measures so much better then a 1700$ Lowther? Please forgive my ignorance.
well, how about that measurements tell only part of the story
http://www.6moons.com/audioreviews/firstwatt/firstwatt_3.html
Am I missing something when a 100$ Fostex driver measures so much better then a 1700$ Lowther? Please forgive my ignorance.
If you heard both you would know the difference. Fostex makes a nice driver at a very attractive price, but it does not perform like a Lowther driver (even the lowest priced PM6C).
Fostex driver measures so much better then a 1700$ Lowther?
Those are only on-axis (and 1 filtered) FR curve. Toole's new book summarizing 40 years of research shows that that by itself is of little help when it comes to correlation with what people find better.
Toole's metric, which he has shown correlates with blind listening tests, requires 70 FR measures in an anechoic chamber good down to the transition frequency.
Since that is not likely to be possible for any of us diyers we just have to listen, and use the FR measures we do make as a tool.
dave
True.
I am no longer afraid of a rising response in a full range driver and a fe206e may be in my future.
The highs arn't supported as well 10' away (the larger the driver, the less off axis dispersion as you go up the freq range).
Or you just sit a little off axis.
I remember a comment about the fostex ft17 (perfect looking frq at madisound).
http://www.madisound.com/catalog/PDF/fostexdrivers/ft17h.pdf
"Well, I was up too late last night Googling for the Fostex FT17 and there are many people recommending it. There were a couple of exceptions though, notably Dick Olsher who tried one with his BassZilla and found it made a spitting noise!" (from diyaudio)
and Olsher saying ft17 lacked resolution............ (can't remember but if forced I may be able to find it).
Yea, a waterfall plot, harmonic distortion, and IM distortion would help decribe a driver better than just a freq response.............
But I agree, those graphs SCARE me !!!!!!!!!!!
Norman
I am no longer afraid of a rising response in a full range driver and a fe206e may be in my future.
The highs arn't supported as well 10' away (the larger the driver, the less off axis dispersion as you go up the freq range).
Or you just sit a little off axis.
I remember a comment about the fostex ft17 (perfect looking frq at madisound).
http://www.madisound.com/catalog/PDF/fostexdrivers/ft17h.pdf
"Well, I was up too late last night Googling for the Fostex FT17 and there are many people recommending it. There were a couple of exceptions though, notably Dick Olsher who tried one with his BassZilla and found it made a spitting noise!" (from diyaudio)
and Olsher saying ft17 lacked resolution............ (can't remember but if forced I may be able to find it).
Yea, a waterfall plot, harmonic distortion, and IM distortion would help decribe a driver better than just a freq response.............
But I agree, those graphs SCARE me !!!!!!!!!!!
Norman
Those are Nelson Pass' measurements with a high output Z amplifier. The article is on the Pass DIY site in full under 'Current source amps and speakers', or something close to that.http://www.6moons.com/audioreviews/firstwatt/firstwatt_3.html
Am I missing something when a 100$ Fostex driver measures so much better then a 1700$ Lowther? Please forgive my ignorance.
Troels Gravesen is not very impressed by the Lowther EX3... I do agree with him.
http://www.troelsgravesen.dk/Lowther.htm
http://www.troelsgravesen.dk/Lowther.htm
might be a good idea to use a piece of foam in front of driver with rising response.
Or any driver needing HF attenuation for the desired response. I used this to achieve the transfer function I was looking for in my 2 way, as the phase was best matched without an electrical filter on the woofer.
Troels Gravesen is not very impressed by the Lowther EX3... I do agree with him.
Lowther EX3
I don't know about you guys, but the distortion graph provided by Troels Gravesen looks absolutely horrible! even for the cheapest speakers you can get from walmart!
Do a search an see what Martin King has to say about his (5 sets).
dave
+/- 15db.... sweet
Attachments
I have not listened to these speakers, but I have listened to many speakers with different harmonics distortion profiles. So looking at the harmonic distortion of a certain speaker gives me a good idea of what it'll sound like. I think what Martin King and others find so magical about these speakers is due to their high ( IMHO unacceptable) 2nd order harmonic distortion.
I think Troels Gravesen did not like Lowthers, because he is used to using high quality scan speaks and seas drivers which generally have very low harmonic distortion.
I think Troels Gravesen did not like Lowthers, because he is used to using high quality scan speaks and seas drivers which generally have very low harmonic distortion.
but I have listened to many speakers with different harmonics distortion profiles.
Did you do this blind. As in before you saw the distrotion curves?
Geddes studies have shown the distortion needs to reach some serious levels before it is audible.
dave
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