newbie question.
Here is review of JBL Stage A130
JBL Stage A130 Review (speaker) | Audio Science Review (ASR) Forum
I was wondering by DIY can we ...
1) match distortion levels ?
2) frequency response sans peak at approx. 1000 to 2000 hz and strong peak at 15khz ?
3) within or equal in same price category ?
Thanks and regards.
Here is review of JBL Stage A130
JBL Stage A130 Review (speaker) | Audio Science Review (ASR) Forum
I was wondering by DIY can we ...
1) match distortion levels ?
2) frequency response sans peak at approx. 1000 to 2000 hz and strong peak at 15khz ?
3) within or equal in same price category ?
Thanks and regards.
For $US209, and from that review, they look to be pretty good performers but I don't know anything else about them.
There are several kit options for under US$200, such as the Overnite Sensations (4" woofer) and C-Notes (5"woofer). I don't think the detailed distortion and other measurements provided in the review of the JBLs are available for those options, but the reviews are pretty good. FR graphs are available on the PE web pages.
PE has a kit for the 'Tritrix' MTs for $200, including cabinets; again, these are well reviewed but the distortion measurements and graphs aren't available. FR looks pretty good and I really like the sound of the Tritrix MTMs.
In Oz, the JBLs are $400-500, for which I could make an excellent DIY bookshelf speaker with a 6.5' woofer, such as a pair of Paul Carmody's "Hitmakers". Components for them - not including cabinet - can be found for about US$200.
I'm sure you'll get heaps of suggestions
Geoff
There are several kit options for under US$200, such as the Overnite Sensations (4" woofer) and C-Notes (5"woofer). I don't think the detailed distortion and other measurements provided in the review of the JBLs are available for those options, but the reviews are pretty good. FR graphs are available on the PE web pages.
PE has a kit for the 'Tritrix' MTs for $200, including cabinets; again, these are well reviewed but the distortion measurements and graphs aren't available. FR looks pretty good and I really like the sound of the Tritrix MTMs.
In Oz, the JBLs are $400-500, for which I could make an excellent DIY bookshelf speaker with a 6.5' woofer, such as a pair of Paul Carmody's "Hitmakers". Components for them - not including cabinet - can be found for about US$200.
I'm sure you'll get heaps of suggestions
Geoff
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Those specs are "anything", and I don't know of any speaker manufacturer that talks about distortion. (for various reasons that are not relevant now)
Personally it's a bit poor on the low end, my pick would be a minimum 6.5 "mid-bass speaker. Either Diy or JBL.
I think the wave-guided highs must be great, but I haven't heard them. If you are not handy with wood and connections etc etc, I would buy something "finished".
Jbl Stage A130 Bafles De Estante Hifi Nva Linea- Avisistemas | Mercado Libre
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Unless you think you really know about the speakers, I would not recommend to buy any speaker until you hear it.
It's extremely hard to beat 200$ / pair of ready made speaker with DIY. This is active
as well.
There are some designs available from meniscus, partsexprrss, Madisound etc but this JBL looks well developed, despite its bargain price.
Good and cheap are overnight sensation by Paul Carmody.
Do you our research on ready made kits or jus buy JBL. You will find lots of them, mainly on Dayton and Hi-Vi.
Btw, Kii Three drivers are Seas DXT, mid is Dayton RS125 and for bass duties they are using 20$ Peerless driver. And each of those is powered by amp costing several times driver cost.
as well.
There are some designs available from meniscus, partsexprrss, Madisound etc but this JBL looks well developed, despite its bargain price.
Good and cheap are overnight sensation by Paul Carmody.
Do you our research on ready made kits or jus buy JBL. You will find lots of them, mainly on Dayton and Hi-Vi.
Btw, Kii Three drivers are Seas DXT, mid is Dayton RS125 and for bass duties they are using 20$ Peerless driver. And each of those is powered by amp costing several times driver cost.
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I hadn't spotted that the JBLs were active, my suggestions aren't really very helpful in that case
Geoff
Geoff
Thank you all. What would be the best way to attenuate 15khz peak shown in the measurements.
regards
regards
In the original post there is a link to the Audio Science Review article, and about halfway down he describes the filter he used to flatten it. That was an active filter, but the 15kHz peak is a single resonance, which you could implement as a passive LRC.
The impedance plot is given in the same article, about 1/3 of the way down. It shows that the impedance around 15kHz is moderately flat at an average of about 8.5 ohms.
You should be able to find "notch filter" descriptions, maybe even a calculator, somewhere online. The specification is a 5dB depth, with a Q of 4.0.
(You may have guessed, I had the same idea, and gave some thought to whether it was feasable. I was too lazy to follow up with an actual design, since I am not that interested in low-efficiency speakers. :^)