On a selfish basis, I'd love to see the Fountek FE83 from PE measured, but it's a buyout driver, so not as worthwhile as something that's going to stick around for a while.
Fountek FE83 3" Full Range Driver 8 Ohm
Fountek FE83 3" Full Range Driver 8 Ohm
Thanx, that fleshes out an idea i was already thinking about,
It will show relative differences, but may not give an absolute lower level. By using the output of the amplifier you might get an absolute level -- but likely a lot of other stuff due to the poor transfer function ofany loudspeaker.
But just like getting a REALLY good waverfall (ref tuxedocivic IIRC), may require an anechoic chamber.
dave
Allen Wright.
From what you pointed out, a more easily understood definition is simply the low level limit of the dynamic range and then additionally what happens to that limit when in the precence of a much louder signal. When i realized that after thinking about your post, it was like the sun coming out from behind the clouds.
dave
The lower limit of the dynamic range is an audiophile concept? That would automatically make dynamic range an audiophie concept since it cannot exist without a lower & upperlimit.
dave
William
Initial evaluation of this driver has us saying it is very good but overpriced (at least in north america). As it has no bass capability for furter evaluation we are planning a FAST for them. Bass enclosure & drivers are sourced, but their completion is not high in our queue.
dave
Thank you Dave. I was also thinking of a FAST with them, although, as you say, they are expensive. I have used Scanspeak drivers in the past and always had good results. I believe that a wide-band midrange/ high frequency driver does better if it is not called upon to do bass duties as well. Could you suggest any other drivers of equal sonic quality for less money?
There is an industry standard test for that. It is spurious free dynamic range SFDR.
No need to invent new audiophile terms for that.
.
Seems that this is a term used in DACs/ADCs. Spurious-free dynamic range - Wikipedia, the free encyclopedia
I don'tknow when this term was originated but it may not have been around when Allen started using his term.
dave
xrk here is a measurement of a 4" driver that I have. It's not a full range (it's actually a midrange) but I like to push the boundaries so used it as a "full range"
I don't have the details of the measurement except that it was taken outside, there is no gating, and it is 1/12th octave smoothed. It's in a reflex enclosure with small baffle and is showing full baffle step.
I's an SB Acoustics SB12MNRX25-4
actually another measurement (with some explanation) here http://www.diyaudio.com/forums/full...-4-full-range-build-thread-3.html#post3599708
Tony.
I don't have the details of the measurement except that it was taken outside, there is no gating, and it is 1/12th octave smoothed. It's in a reflex enclosure with small baffle and is showing full baffle step.
I's an SB Acoustics SB12MNRX25-4
actually another measurement (with some explanation) here http://www.diyaudio.com/forums/full...-4-full-range-build-thread-3.html#post3599708
Tony.
Attachments
I could see this as being quite pleasant with fair tonal balance, assuming wise placement or straight-up BSC is used.
Here's a driver I've been eying for some time, Fostex FW137:
http://www.fostex.jp/wp/wp-content/uploads/2014/09/fw137.pdf
I'd call it a wideband midbass, with its seemingly smooth on-axis extension, though I would not be surprised to measure a bit worse in the upper registers. Looks like it could do some decent bass in 10-20L if you don't push it too hard. I've half a mind to grab a pair.
Last edited:
I've yet to do polars of it. but it does have a very neutral sound. A little bit harsh in the top end.
Note that my mic is not calibrated, but it is a wm-60AY which are renound for being very flat. certainly tweeter measurements would indicate it as being so, but it is what it is, ie uncalibrated.
I thought I'd post it because a lot of people look at full range drivers for possible use in a multiway with helper woofers and super tweeters. I think this driver is very good for that, but would be good to do off axis measurements as well.
Tony.
Note that my mic is not calibrated, but it is a wm-60AY which are renound for being very flat. certainly tweeter measurements would indicate it as being so, but it is what it is, ie uncalibrated.
I thought I'd post it because a lot of people look at full range drivers for possible use in a multiway with helper woofers and super tweeters. I think this driver is very good for that, but would be good to do off axis measurements as well.
Tony.
No, 'DDR' is an audiophile concept. How often do you plan on putting words in my mouth? This is the third time. Your behavior is know as trolling. Please stop it.
Renowned electronics designer from New Zealand. Served his initial field work at HP in Australia, did his early audio work there where he formed Vaccuum State Electronics, then to Munich and then Switzerland. He was a friend of mine and a great influence.
http://www.diyaudio.com/forums/everything-else/186251-allen-wright-has-passed-away.html
His company lives on Vacuum State - High End Hifi Equipment and the closely related Joe Rasmussen Pages
dave
But you keep saying that the lower limit of Dynamic Range is an audiophile concept.
No matter how many times you say it, it will not become an audiophile concept. The particular term's use may not be wide-spread, but it was coined by an engineer and is not at all widely known in audiophile circles.
dave
While we're at it, here's a measurement of the FF85wkEn and the Mark Audio Alpair 6p. Not exactly equivicable, but useful. Data not useful below 300hz and not in absolute SPL (I shy away from REW, it's clunky).
http://www.diyaudio.com/forums/full...udio-alpair-6p-tested-against-each-other.html
http://www.diyaudio.com/forums/full...udio-alpair-6p-tested-against-each-other.html
I'd not come across the DDR term before but to me it seems it is simply the ability of a driver to reproduce low level information in the signal at the same time as producing the louder parts. That is it can still faithfully reproduce the low level details without being swamped by the higher level signal.
That seems like something technical to me and in no way an audiophile concept.
Bit like when mp3 lossy crompression came out. Suposedly the low level details could not be heard so could be thrown away without ill effect. I think that has been proven incorrect with DBT's.
Tony.
That seems like something technical to me and in no way an audiophile concept.
Bit like when mp3 lossy crompression came out. Suposedly the low level details could not be heard so could be thrown away without ill effect. I think that has been proven incorrect with DBT's.
Tony.
- Status
- Not open for further replies.