absolute gold! Here's the spec!
http://www.audax.com/archives/HIF13H2CA12 - Catalogue 1986.pdf
man this is exciting sorry.
http://www.audax.com/archives/HIF13H2CA12 - Catalogue 1986.pdf
man this is exciting sorry.
So the Qts is only .29. Quite low for a driver used in a BP sub cabinet no?
I was thinking hight Qts, low Fs and high Vas
I was thinking hight Qts, low Fs and high Vas
It appears that this driver: SPH-135KEP has very close Fs and Qts. Can someone tell me what it's Vas will be in Litres?
Here's the Audax spec: http://img16.imageshack.us/img16/1739/hif13h.jpg
Here's the Audax spec: http://img16.imageshack.us/img16/1739/hif13h.jpg
Just realised I have a pair of these drivers under my desk. Anyone know if they'd make a good match for the mid-bass section?
https://www.google.co.uk/search?q=m...ker-60--LFC13BK%2F320898650036%2Fitem;400;266
They're from a pair of mission 760s
https://www.google.co.uk/search?q=m...ker-60--LFC13BK%2F320898650036%2Fitem;400;266
They're from a pair of mission 760s
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Nice project, I love it. Congratulations... 😀
Audax HIF13H-2CA12
Vas = 14.10 (L)
Xmax = +/- 4 (mm)
The lower the Qts, the wider its available gain BW, ergo a high Qts will have a very narrow 'one note' gain BW. These define the limits where Fs is the mean:
Fl = Fs*Qts/2
Fh = Fs*2/Qts
GM
Was that a mid driver?! It's possible that would not go so low as the mission (guess). The Audax is working in conjunction with a low frequency bandpass, check the crossover. I would use it but measuring T/S parameters is a good procedure (and frequency/output/impedance).
I'm afraid to say this but the most similar driver (not the best probably, because it's a woofer) I found, here.
http://www.morelhifi.com/old/products/pdf/Woofers/EW/Specs sheet ECW 536.pdf
Interesting anyway, for a future prototype.
See the attached T/S specs calculated from the electro, mechanical ones for Monacor, Audax:
GM
Attachments
So the litres, xmax, qts and fs are close. Do you agree it's a good match for the Audax?
Strange. I thought it was the other way around and why a higher qts driver can respond further below the resonant frequency?
This driver has a qts of .45 http://www.monacor.co.uk/uploads/tx_commerce/drawings/b279c9ef2661f40_K.jpg
And this one has a qts of .29 http://www.monacor.co.uk/uploads/tx_commerce/drawings/dbeb3759176e7a7_K.jpg
is that right? or have I got it backwards? for some reason a while back when making a sub I came to the advise to choose a driver with low Fs and high QTS to achieve good sub response?
That driver looks good, although expensive. Do you not think this speaker has closer thiele parameters however? SPH-135KEP
I think I will forget the mission driver as I do not know it's spec. I may build a replica of the 760i in future instead, I have written out some plans for that previously also.
Looks good, for your new project. Make sure to respect or at least to be close to the available speaker specs that you reversed engineered.
This driver you mention (as a mid driver) needs something close to, in this case as a reference or starting point, in a vented enclosure for SPH-135KEP
VB = 6.2 L, FB = 47 Hz
F-3 dB 71 Hz
F-6 dB 54 Hz
2 Ports
int. diam. 3.4 cm (S: 18.16 cm2)
length 35.74 cm
(impedance peak at ~90Hz)
Sealed MONACOR SPH-135KEP, VB = 7.0 L
F-3 dB 120 Hz
F-6 dB ~90 Hz
(impedance peak at ~80Hz)
Check if original was aperiodic or not.
The frequencies will relate to woofer crossover frequencies.
If you are looking at similar woofers (or others?) check the MONACOR SPH-135TC or MONACOR SPH-135/AD for better LF extension (F10=25/30Hz) and 15-20 L br enclosure. The bandpass will give you the best matching with the mids as the originals, I'm guessing here (insert future simulation and woofer driver models/brand for a more accurate project/prototype that can match with what you have).
http://www.wilmslow-audio.co.uk/monacor-sph-135ad-641-p.asp
Another woofer/sub reference (same size) for a vented (other?!) first prototype (or reverse engineering the one you have?, I need to know more at this point):
Scan-Speak 15W/8530K01
Scanspeak 15W/8530K01 MidWoofer - Revelator Range
VB = 20.4 L, FB = 25.7 Hz
F-3 dB 37 Hz
F-6 dB 27 Hz
1x Ports
int. diam. 5.7 cm (S: 25.52 cm2)
length 52.40 cm
Scan-Speak 15W/8530K01
Scanspeak 15W/8530K01 MidWoofer - Revelator Range
VB = 20.4 L, FB = 25.7 Hz
F-3 dB 37 Hz
F-6 dB 27 Hz
1x Ports
int. diam. 5.7 cm (S: 25.52 cm2)
length 52.40 cm
You're welcome!
Don't know, I've no personal experience with any of these drivers and actual specs can vary enough from published to make them hard to blend [more complex XO] plus the issue of potential 'tone' mismatches that unfortunately can't be known from either T/S specs or a frequency response plot.
What you're trying to accomplish is no trivial pursuit to do right, especially without measurements.
GM
Tom (aulday),
As GM is pointing to you, I hope you can find the (right) mid you are looking for. That I assume, it's the (/your) first priority, I would go from there. 😀
Another interesting driver to consider for this or different project...
Aurum Cantus AC-130MKII
As GM is pointing to you, I hope you can find the (right) mid you are looking for. That I assume, it's the (/your) first priority, I would go from there. 😀
Another interesting driver to consider for this or different project...
Aurum Cantus AC-130MKII
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