this 4" Made in Indonesia SONY Full-range speaker is amazing IMHO because db-meter rated 96.7 db @ 1wat/1meter in open baffle configuration... in a sealed enclosure this little baby will do approximately ~50hz to ~18khz
pure sound was coming out driving with a small tube gear rated max 4W rms output
pure sound was coming out driving with a small tube gear rated max 4W rms output
An externally hosted image should be here but it was not working when we last tested it.
This one is pretty good from 100-5000HZ and inexpensively commonly available. Was quoted $12 about 2 weeks ago...
Atlas Sound - FC104-T70
Atlas Sound - FC104-T70
Atlas is not to fond of people linking to their site it seems... Interesting driver, do you happen to know the TSP? I cannot find them, only fs is mentioned as being 100hz. And these plots. Atlas Sound FC104-T70 Specification Sheet (Page 2 of 2)
Cheap and high eff seem to be my triggerwords
What do you think about this fellows :
A grup buy interest for Audax PR170Z0 from Audax :
Ist one of the best driver still and worth to ask to Audax a batch of 100 drivers (50 pairs) ? I can drive this as a french if they can plan to send us by thereselves with tracking number shipment!
Neo10 planar is good but just 94 DB in the upper range and XO is 250 hz mini !
But maybe is there a non outdated driver which is still better than this Audax for high effiienty mid-bass ?
A grup buy interest for Audax PR170Z0 from Audax :
Ist one of the best driver still and worth to ask to Audax a batch of 100 drivers (50 pairs) ? I can drive this as a french if they can plan to send us by thereselves with tracking number shipment!
Neo10 planar is good but just 94 DB in the upper range and XO is 250 hz mini !
But maybe is there a non outdated driver which is still better than this Audax for high effiienty mid-bass ?
I do not have the TSP for this driver though would say the Q is about 0.5 in the box or there abouts. TSP is not needed for anything concerning using as a real driver. Xmax is about 1mm but have not measured that either however, figured this out somehow. It sounds far better than I believe it has any right to and works likewise far better. A nice basket also with lots of mounting. Nominal 8 ohms.
A diy plasma tweeter was uncanny in the high frequency area-- but the ozone was too much !!
In general, the various TAD compression drivers are first class drivers in their frequency ranges when used in PROPER horns.
My Sequerra t1 mk4 ribbon tweeters are VERY detailed and excellent sounding.
In general, the various TAD compression drivers are first class drivers in their frequency ranges when used in PROPER horns.
My Sequerra t1 mk4 ribbon tweeters are VERY detailed and excellent sounding.
PR 170 zo DISC
The PR 170zo was a MID RANGE (only) driver, as opposed to a mid bass driver.
The current production PR 170 MO has received some quite nice reviews from users. The PR 170zo was actually better suited to a large mid range horn, but I had never seen anyone use it that way, back in it's production day.
The PR 170zo was a MID RANGE (only) driver, as opposed to a mid bass driver.
The current production PR 170 MO has received some quite nice reviews from users. The PR 170zo was actually better suited to a large mid range horn, but I had never seen anyone use it that way, back in it's production day.
I just got my hands on an ESS Oskar Heil AMT. Measures flat from 700Hz to 20kHz. No ringing in impulse response and very fast transiebts. The factory spec say 92dB at 1 watt but I measure 100.5dB at 2.83v. It sounds wonderful and very detailed, open, and revealing. No harshness, no fatigue. One of the best drivers I have heard. Truly special.
Many of your country fellows say it sounds even better above 6K to 8K Hz
Where it doesn't severely interfere with what you can hear...
how about this one
How does this look to you? I sell these which are custom made and then further modified here. 2.83 volt curve.
How does this look to you? I sell these which are custom made and then further modified here. 2.83 volt curve.
Attachments
I built a three-way speaker with these, along with the ScanSpeak D2905-9300 and the Audax HM210Z0, fifteen years ago, and have been messing around with these with various crossover configurations ever since, generally improving things a little as I go along. All the same, I have recently decided to cut my losses and go for Troels Gravensen's Classic Three-Way Mk2.
The 4" Audax HDA mid is indeed a very special driver, and has the potential to give a terrifically high definition sound. The Hi-Fi World LS6 design article, which was my original inspiration for the project, described its sound as "electrostatic-like". Its other crucial characteristic is its high sensitivity: 93 dB/1W/1m. This means that, in a three-way system with the usual bandpass filter boost, it is far too sensitive for most combinations of woofer and tweeter - in fact in the end I had to pad it down by 7dB to match mine, which I am convinced negatively affected its sound.
I think this is the Achilles heel of this driver, since if you are going to put the usual inductor in the woofer circuit to compensate for the baffle step, it means that you are going to need a woofer (or probably a pair of them) with effective sensitivity of 96 dB/1W/1m or so to take full advantage of the HM100Z0, and also use a much higher-sensitivity tweeter than most on the market.
As already stated in this thread, another important consideration with the HM100Z0 is its limited power handling and its high-ish Fs (350Hz or so, if I remember correctly), which means it needs a fourth-order filter at its low end at 4-500Hz or so to perform comfortably.
Once I have finished building Troels's design, I might experiment with the HDA mid - perhaps with an active filter setup so I don't need to passively attenuate it so brutally.
Alex
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