Hey X - What was your Beta8cx XKi's tuning ? I'm worried mine are tubed too low and can't be modified. As built by my friend with a long tunnel vent and tight aperture comes in @ ~60Hz - which is well below a target of around 70Hz - then again that may be acceptable as GregB's Karlsonator 8 tuned around 41Hz.
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I'd like to add my "boombox" made of two PA130 XKi that sit on a carrier has very good sound with a $20 or so Kinter 3118 12 volt supply amp and its tone controls are useful (plus can bypass). It was a total success.
A 10 inch XKi ("Tiny 10") built by a friend has not proven itself yet. Loaded with a Tymphany "pro" 10" woofer, its pink noise graph doesn't even reach 100Hz - and is beaten by an Alpha 10A. The rear chamber is only about 25 liters - but that should be sufficient - with some 10" speakers such as Delta 10A.
Bandpass sim were too optimistic for LF extension - dunno about those pink noise graphs .
If I get this cabinet then will try a couple of different 10 speakers and bass guitar.
A 10 inch XKi ("Tiny 10") built by a friend has not proven itself yet. Loaded with a Tymphany "pro" 10" woofer, its pink noise graph doesn't even reach 100Hz - and is beaten by an Alpha 10A. The rear chamber is only about 25 liters - but that should be sufficient - with some 10" speakers such as Delta 10A.
Bandpass sim were too optimistic for LF extension - dunno about those pink noise graphs .
If I get this cabinet then will try a couple of different 10 speakers and bass guitar.
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Would it work with the Alpair 5.3?XKi with A6
Here is the design for an XKi with the A6p:
6in Wide x 10in tall x 6.3in deep (all internal dims) with a 6in wide x 0.5in tall x 11in long vent. Total active volume (front and back) is 5 liters. Make the triangle front chamber 2.5in deep from front. Use 1/2in plywood.
Here is SPL at 2.83v (fb is about 67Hz):
Here is Impedance:
Here is cone displacement at xmax of 5mm and 8,3v drive:
Here is max SPL - about 100dB at 8.3v:
I have one on the way to a project, and it would be very cool to test it with a full printed version of the XKI. My printer have a build plate for 22cm x 22cm x 250cm, and would be great to fit in one print.
Hi,This was made in my usual spot inside my lab on top of a 30in tall stool about 3.5ft away from back wall. Mix was about 36in high off the floor. So there are walls for sure but mix is 0.5m away so helps to reduce ceiling and floor bounce.
It’s been a while but I think the above is with EQ applied. Here is difference between raw (red) with high pass filter (green) and with EQ (blue):
Here is typical photos of the setup (different speaker but similar setup).
View attachment 1189815
I've kinda started to jump thru this thread.
I saw earlier someone posted about using a B&C 8CXN51 driver.
While a full range, it tops out around 18kHz. (70Hz - 18kHz)
Here you're showing the Tang Band 8" Coax. (Parts Express lists it but you need to buy 50 of them before they'll order it in. )
Got to ask... How would the Tang Band Coax do in this box? I forget the specs but if memory serves. 38Hz to 40kHz.
You'd have to put in an XO ... something around 1.1kHz???
PE recommends a vented cabinet of ~1cubic ft or ~28L
Thoughts?
Thanks for the response...
I don't have anything yet... I'm kicking the tires... waiting for April to see what new at AXPONA. (I live in Chicago so its a short drive... in traffic)
The larger problem w Tang Band, that coax isn't available at Parts Express unless you want to buy 50 of them. I believe they are the only suppliers in the US?
-Mike
I don't have anything yet... I'm kicking the tires... waiting for April to see what new at AXPONA. (I live in Chicago so its a short drive... in traffic)
The larger problem w Tang Band, that coax isn't available at Parts Express unless you want to buy 50 of them. I believe they are the only suppliers in the US?
-Mike
You can get them from Europe. About $300 though - not inexpensive. But it’s a special sounding driver.
https://www.ebay.com/itm/1740058551...Y9mcKZ3Rq-&var=&widget_ver=artemis&media=COPY
https://www.ebay.com/itm/1740058551...Y9mcKZ3Rq-&var=&widget_ver=artemis&media=COPY
my kid is using the PA130 XKi with a cheap but cheerful Kinter 3118 amp (~$23 !) with his laptop - its really impressive. Do the double driver XKi sound as good/clear as single driver versions?
- A double driver PA1330 - or double Beta8A with K-tube could be pretty powerful. How should the doulbe Beta8A be done?
- A double driver PA1330 - or double Beta8A with K-tube could be pretty powerful. How should the doulbe Beta8A be done?
Ok,You can get them from Europe. About $300 though - not inexpensive. But it’s a special sounding driver.
https://www.ebay.com/itm/1740058551...Y9mcKZ3Rq-&var=&widget_ver=artemis&media=COPY
So I went to AXPONA yesterday. Stopped by the Parts Express room. Talked to one of the guys...
Seems that sometimes Tang Band can be hard to work with. I get that... Sometimes its hard to work w manufactures who have their agenda and vendors have to face the market ... Not sure I'd buy from E-Bay... would rather pay shipping from Europe. But still while they seem interesting... going w a 2 way tweeter/ woofer may make more sense.
I did like the guys from Madisound and from Parts Express. I'd rather buy from a store where there's customer service.
Since I'm really only planning on building one or maybe two sets of speakers... Going w a kit may be safer. Or if I do go Co-Ax or full range... look at a different speaker.
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