I recently saw these drivers which seem to have pretty nice specs - and the price of 6 for $90 seems like quite a bargain. Strange how I have not seen these drivers mentioned as part of any projects around here. These are 6.5 in poly fiberglass woofers with 0.57 Qts, 89dB, 60Hz fs, 3.75mm xmax, 100 watt rating. They look pretty nice too.
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If anyone has experience or feedback on these drivers that would be great.
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An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
If anyone has experience or feedback on these drivers that would be great.
I have used and measured these drivers, sourced from the same seller (Zalytron). For the price they are fine, but not a "high end" driver IMHO.
For instance, the attachment is the distortion measured at not a very high volume. As you can see, distortion is a bit high below 300-400 Hz. If you used the driver as a large midrange crossed over to a woofer at 400Hz all will be well up until the first breakoff peak around 2.5k-3k Hz. Cross to a tweeter there and you have a nice 3-way.
Attachments
Those distortion figures are not too bad if you use it above 250Hz even. I think it is a clean looking driver and suitable for many modest applications when crossed with a tweeter on top and a good woofer on the bottom. At this price one can use a couple or even four in parallel series and keep excursion low for even less HD. With two in parallel as an MTM you can get 95dB sensitivity. These even look like an overgrown Vifa TC9FD. One could use this as an MTM FAST with a Vifa as the tweeter/mid above the baffle step circa 1khz. That way, the extra sensitivity of the mids provides a natural BSC.
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I don't mean it as a jab at Charlie, but "as I can see", that's a meaningless squiggle created from a driver measured somehow somewhere with some stuff at some level. Without a lot of measurement condition information, and preferably a level-matched comparison of a comparable driver done with the same setup, what is anyone really supposed to think of a graph like that? Sure that's kind of unreasonable, but such are distortion measurements. If somebody made a post like that about a driver a lot of people use, they'd go berserk.
Such is the curse of anonymity. Anytime a freq response curve is posted for a well regarded Asian made driver with a round plastic frame folks do indeed, go berserk.
OK, so my distortion plot was a little less hard facts and a little more hand waving. I did say that this was not playing very loudly, so maybe around 80-85dB@1m or so. You should at least be able to determine that this driver is exceeding 1% distortion below about 200Hz (or higher if you go with the "peaks" in the measurement) and that is the threshold of what I consider to be B-A-D reproduction. The driver is not expensive, and if you use it carefully it's fine. It's probably on about the same performance level as many of the other "bargain/closeout" drivers that you find out there - being not all that good on an absolute scale. For $10 this would be a great bargain, but it's not priced at $10.
Why don't you buy one or six and do your own measurements if you don't like what I have shared about the driver.
Why don't you buy one or six and do your own measurements if you don't like what I have shared about the driver.
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Can you share the freq response curve? I can't find anything on this driver other than the TS params on the website where they are sold.
Sure, no problem. Attached is a plot of a gated FR measurement done on axis, in-box, so it includes baffle step loss. Not exactly sure what gating I used although it's probably around 4-5ms window length so 200Hz and up is OK. Also attached is a picture of the speaker - its the top driver. The cab is 40"H and 12"W.
Attachments
Here is the FRD file data plotted above:
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That looks like the same driver that is in my focal 714v except 6" vs 5". After blowing two and contacting focal for replacement they were $100 each. So 6 for $100 seems like a good buy.
Looks like the zalytron site is down.
Looks like the zalytron site is down.
Why bother with plastic frame focals, while stamped
steel Peerless SDS are available at PE for about 20$ ?
steel Peerless SDS are available at PE for about 20$ ?
You mean this driver?
Peerless SDS-160F25PR01-08 6-1/2" Paper Cone Woofer Speaker
It is 87dB, the Focal has a bit higher sensitivity. Plastic frame drivers are not always inferior to stamped metal frames. Often they have better damping and less buzz. The Focal looks nicer in my opinion. Don't get me wrong, I am a big Peerless/Vifa fan.
Yes, that's the one. I don't care much about sensitivity. It's an
overrated quality feature anyway. What should matter is decent
low frequency extension with enough Xmax capability for moderate
listening levels.
I like Focal drivers and I have worked with 5 inch polyglass
(plastic frame), polykevlar (zamak alloy frame) and W cones,
and they were all more or less fine. A higher Fs with Focals
is considered normal.
I just happen not to like the cheap look of plastic frame.
overrated quality feature anyway. What should matter is decent
low frequency extension with enough Xmax capability for moderate
listening levels.
I like Focal drivers and I have worked with 5 inch polyglass
(plastic frame), polykevlar (zamak alloy frame) and W cones,
and they were all more or less fine. A higher Fs with Focals
is considered normal.
I just happen not to like the cheap look of plastic frame.
I am toootally dredging up an old thread, but I find myself in need of ONE 6.5 Focal 8ohm...did any of you buy these and would be willing to part with one (or two?). Focal no longer makes them. They told me to buy new speakers. niiice. 🙁
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