Would it spoil the blind listening test in Round 5 if the measurements were presented first? I mean, it's no surprise since one can look up any of these drivers. I have always presented it at the reveal, but now wonder maybe should be up front. It is still "blind" but you may know what to "look for" when listening to it.
Go ahead
as others really interested in seeing how the Jeep driver measures in a normal room environment, sound clips comparison will still have high value and be fun.
For fans of the SB65, I just ran across this extensive test of the SB65WBAC25-4 with Klippel, CSD, etc.
http://www.parts-express.com/pedocs/tech-docs/es140ti-8_voicecoil-review.pdf
The new ES140Ti 5.5in mid bass from Dayton looks pretty nice too.
http://www.parts-express.com/pedocs/tech-docs/es140ti-8_voicecoil-review.pdf
The new ES140Ti 5.5in mid bass from Dayton looks pretty nice too.
I like to listen first and then see the frequency response. I find it really hard to be truly objective if I have something to look at before I listen. There are times we can get surprised by what we think sounds better. Maybe make the measurements available, but make it so we have to click on it to see.
Aurum Cantus AC130F1 as a mid almost a full ranger
I just got an Aurum Cantus AC130F1, a 5.25in mid bass driver. The published specs are amazing and the measurement confirms this is one of the flattest, smoothest response drivers out there. It can almost qualify as a full range. I have it mounted to a sealed Hypercube with some stuffing and playing music direct drive - it sounds very nice. This cone essentially has no breakup. The Hypercube enclosure has a resonance at 1.55kHz which shows up as a small 2.4dB blip. But near field (2in meas) shows it is flat from 100Hz to 10kHz. The impulse and step response are very impressive for a woofer. Anyhow, this will be my next driver to try to integrate with a nice tweeter.
I just got an Aurum Cantus AC130F1, a 5.25in mid bass driver. The published specs are amazing and the measurement confirms this is one of the flattest, smoothest response drivers out there. It can almost qualify as a full range. I have it mounted to a sealed Hypercube with some stuffing and playing music direct drive - it sounds very nice. This cone essentially has no breakup. The Hypercube enclosure has a resonance at 1.55kHz which shows up as a small 2.4dB blip. But near field (2in meas) shows it is flat from 100Hz to 10kHz. The impulse and step response are very impressive for a woofer. Anyhow, this will be my next driver to try to integrate with a nice tweeter.
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Thank you all for the info.
The AMT-6MDN44-Harsch tests should be very interesting!
BTW, the Butterworth 1st order linear phase plots shown earlier are very impressive, even nice square waves could be reproduced and that is really hard to do!
http://www.diyaudio.com/forums/full-range/273524-10f-8424-rs225-8-fast-ref-monitor.html
And I would like to try this passively first for.the AMT with a vintage full range speaker , what would be the lowest recommended electrical xo.freq be for the AMT? Thanks.X!
The AMT-6MDN44-Harsch tests should be very interesting!
BTW, the Butterworth 1st order linear phase plots shown earlier are very impressive, even nice square waves could be reproduced and that is really hard to do!
http://www.diyaudio.com/forums/full-range/273524-10f-8424-rs225-8-fast-ref-monitor.html
And I would like to try this passively first for.the AMT with a vintage full range speaker , what would be the lowest recommended electrical xo.freq be for the AMT? Thanks.X!
Thank you all for the info.
The AMT-6MDN44-Harsch tests should be very interesting!
BTW, the Butterworth 1st order linear phase plots shown earlier are very impressive, even nice square waves could be reproduced and that is really hard to do!
http://www.diyaudio.com/forums/full-range/273524-10f-8424-rs225-8-fast-ref-monitor.html
And I would like to try this passively first for.the AMT with a vintage full range speaker , what would be the lowest recommended electrical xo.freq be for the AMT? Thanks.X!
I would use a fourth order at 3khz high pass on the AMT, a Butterworth or LR circuit. Use 2nd order on the mid low pass at 3kHz. To get the delays right you need to be able to precisely move the AMT relative to the mid. Look in this thread for more info:
http://www.diyaudio.com/forums/multi-way/277691-s-harsch-xo.html
The other way is the B&O Hole Filler XO. Use a 2nd order high pass on the AMT and a first order low pass on the mid. More info here:
http://www.diyaudio.com/forums/multi-way/88135-filler-driver-ala-b-o.html
Then on the woofer, use second order low pass at 800Hz and first order high pass on mid at 800Hz.
You want something that looks similar to this:
The spreadsheet to generate those target filter functions is here:
http://www.reocities.com/kreskovs/GenFiller.html
Byrtt has simulated this electrically with all DSP Xo here and summed response in a resistor load. It works quite well if you can get the drivers to behave and follow the target responses.
Here is resulting step response:
This is getting a bit OT so if you have more questions, please post in the above two threads.
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I heard the ac130f1, JHC! it was nice in a Continuum Transmission LIne.
Very smooth, very detailed. Not much in the way of BSC; too bad they were not closer to a wall. I now believe that drivers have moved on from the past.
XRK I am trying to marry a Dynaco a25 woofer to a Phase Tech PC60 tweeter using the existing xover from the PC60. Sounds pretty good but is light on top. The Shure cartridge I use is a bit light on top too. I figure if a woofer works well without a crossover it's response is surely good enough to use with one.
If I were to send a pic of the xover could you perhaps tell me how to mod it, maybe remove a resistor? There are 7caps, 3 coils, and 4 resistors!
Very smooth, very detailed. Not much in the way of BSC; too bad they were not closer to a wall. I now believe that drivers have moved on from the past.
XRK I am trying to marry a Dynaco a25 woofer to a Phase Tech PC60 tweeter using the existing xover from the PC60. Sounds pretty good but is light on top. The Shure cartridge I use is a bit light on top too. I figure if a woofer works well without a crossover it's response is surely good enough to use with one.
If I were to send a pic of the xover could you perhaps tell me how to mod it, maybe remove a resistor? There are 7caps, 3 coils, and 4 resistors!
That would work. I think if you just made them attachments the thumbnails would be too small for us to read the name of the driver until we clicked it to open it up to full size. That might be more convenient, but either way is fine with me. I just appreciate you doing this for the forum. Good stuff.
I just bought 2 B80's from them for $140 including the ride. not Bad. I live in North Carolina.