New Made in Canada 22mm Tweeter Series $70 a Pair - diyAudio
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CSS Creative Sound Solutions (CSS) is a service-oriented provider of high-value speaker components for the DIY loudspeaker builder

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Old 17th November 2013, 12:17 AM   #1
CSS/XBL is offline CSS/XBL  Canada
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Default New Made in Canada 22mm Tweeter Series $70 a Pair

This new series of 22mm soft dome tweeters are our first "Made in Canada" offerings. They are the tweeters in our new V1, V2 and V3 kits and will also be an option in our new ML-TL in development. Packed in pairs both mounting screws and sealing gaskets are included.

LD22FLAT.jpg


The LD22F has a more conventional face plate offering.

LD22CURVE.jpg

The LD22C has extremely good off axis response for a great imaging presentation.

LD22 Low Distortion Tweeter.pdf Updated

Last edited by CSS/XBL; 27th November 2013 at 10:44 PM.
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Old 17th November 2013, 01:14 AM   #2
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These look very interesting...

What type of measurements were you planning on publishing?

I would be very interested in seeing:
  • on- and off-axis frequency response curves out to at least 60 degrees (90 deg is better) every 10-15 degrees or so on a large baffle
  • level of 2nd-5th harmonic at 85dB@1m and 95dB@1m SPL (e.g. linear distortion testing)
  • driver impedance from 1kHz-10kHz zoomed into the "baseline" region

These tests are not difficult to do and would clearly show the quality of your product.

I truly wish that more detailed testing of this type was more commonly available from manufacturers, but DIYers are left to rely on a shrinking handful of generous people who publish their own testing results.

-Charlie
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Old 17th November 2013, 02:22 AM   #3
CSS/XBL is offline CSS/XBL  Canada
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Hi Charlie,

Thanks for your input. Do you have any examples from manufacturers who provide this sort of data for a $35 tweeter?

We are looking at 2 types right now. One would be measured on the typical "kit sized" baffle where we have experience with the kits we're making available. Second, Patrick at Red Rock Acoustics is doing some new measurement techniques which I don't think are public yet and so we've talked about that with him.

Later
Bob
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Old 17th November 2013, 02:35 AM   #4
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Quote:
Originally Posted by CSS/XBL View Post
Thanks for your input. Do you have any examples from manufacturers who provide this sort of data for a $35 tweeter?
No, and that is exactly my lament.

This kind of testing is not expensive. Many DIYers can do it, including me, so why manufacturer's aren't providing the data is a mystery to me.
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Old 17th November 2013, 04:56 AM   #5
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Quote:
Originally Posted by CSS/XBL View Post
Patrick at Red Rock Acoustics is doing some new measurement techniques which I don't think are public yet and so we've talked about that with him.
I looked at that company's web site. Impressive.

But there is a huge gulf between what is currently offered (by CSS and most other companies) and the testing methods listed at Red Rock Acoustics. Most DIYers don't need a full Klippel analysis of the driver. We would be thrilled with linear distortion measurements, however. With just a one time $200-$300 investment you can make all of the measurements that I described "in house", over and over again, on every model of driver you produce, now and in the future, and it's not all that complicated.
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Old 18th November 2013, 03:04 AM   #6
RAW is offline RAW  Canada
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As I am designing a lot of kits for this tweeter there is more than enough measurements for the tweeter.
I have done and do acoustic measurements from 0-40 off axis and we have those for the kits using a 7" wide baffle to a 10" wide baffle.

My measurements with Praxis, I can provide all measurements for Bob at a moments notice.And as we (Bob and I) meet normally at my place every week Bob knows me very well.Bob gets to not only see the measurements watch me do some measurements but also listen to any crossovers before the crossovers are complete

Having Red Rock do the measurements for the drivers is smart move to have a non bias party do such complete measurements.As well with the complete measurements Bob is making a step in the direction you just mentioned.Having complete measurements done not only on a IEC baffle.

With Red Rock doing the data then myself doing other measurements for CSS. CSS customers will have reliable set of parameters as well as measurements on several baffle widths.
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Old 2nd January 2014, 04:11 AM   #7
RAW is offline RAW  Canada
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Below is the measurements for the NEW CSS LD22C and LD22F Tweeters.Most of this info is in the PDF on the CSS site plus above.For those not wanting to click and download here.

LD22C on 10 inch wide baffle on axis
Click the image to open in full size.

LD22F on 10 inch wide baffle on axis
Click the image to open in full size.

LD22C on 10 inch wide baffle 0-40 off axis
Click the image to open in full size.

LD22F on 10 inch wide baffle 0-40 off axis
Click the image to open in full size.

LD22 nearfield waterfall plot
Click the image to open in full size.

LD22C impedance
Click the image to open in full size.

LD22F impedance
Click the image to open in full size.

LD22C impedance data
Click the image to open in full size.

LD22F impedance data
Click the image to open in full size.

LD22 tweeters compare the LD22C to the LD22F on axis frequency response.This shows the difference between the 2 tweeters on axis.
Click the image to open in full size.

Last the LD22 tweeters off axis compare both tweeters 40 off axis.
Click the image to open in full size.

More data will follow once RED Rock completes the testing on these tweeters.
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Old 2nd January 2014, 06:54 PM   #8
CSS/XBL is offline CSS/XBL  Canada
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Thanks Al. Hope to connect with Red Rock in the next few days so we can get the testing done.

Bob
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Old 3rd January 2014, 08:16 AM   #9
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Does the LD22 use XBL like the LD25X? The LD25X is one of the most detailed tweeters I have ever heard, does the LD22 sound similar? Thanks!
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Old 3rd January 2014, 10:47 AM   #10
sreten is offline sreten  United Kingdom
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Hi, No. 1.6mm coil in a 2.5mm gap. rgds, sreten.

FWIW ~ double the excursion of a typical Seas tweeter.
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Last edited by sreten; 3rd January 2014 at 10:50 AM.
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