I did a test build of the Lark SM - proper cabinets awaiting build - and think they sound fine, they'll be used in a study.
Geoff
Copying the baffle dimensions, driver spacing, crossover point used for the ASR directiva speaker could work.
https://www.audiosciencereview.com/...r-directiva-open-source-speaker-review.27094/
But with a different a 6.5" woofer (same Sd), for example the Wavecor WF18 has very good parameters for a 10-15l sealed box, and measurements look very good up to 3kHz. As for the tweeter, personally I'm a fan of the Seas DXT, would be a top recommendation always.
But this would be a more involved DIY project, developing the crossover. Factoring in costs for the crossover, and it seems wouldn't quite fit the 600 Euro budget.
The Heissmann DXT-Mon kit uses the same drivers, could be another example how the baffle geometry could look like:
https://heissmann-acoustics.de/en/produkt/bausatz-dxt-mon-182/ (6.5" woofer)
https://heissmann-acoustics.de/en/dxt-mon/ (smaller, 5.5-6" woofer)
https://www.audiosciencereview.com/...r-directiva-open-source-speaker-review.27094/
But with a different a 6.5" woofer (same Sd), for example the Wavecor WF18 has very good parameters for a 10-15l sealed box, and measurements look very good up to 3kHz. As for the tweeter, personally I'm a fan of the Seas DXT, would be a top recommendation always.
But this would be a more involved DIY project, developing the crossover. Factoring in costs for the crossover, and it seems wouldn't quite fit the 600 Euro budget.
The Heissmann DXT-Mon kit uses the same drivers, could be another example how the baffle geometry could look like:
https://heissmann-acoustics.de/en/produkt/bausatz-dxt-mon-182/ (6.5" woofer)
https://heissmann-acoustics.de/en/dxt-mon/ (smaller, 5.5-6" woofer)
Understood......a noble pursuit.......build a three way with an incredible midrange driver.....it’s the key to every mix engineer’s heart
I like alot of Mike's designs, but I tend to agree with this. The BC25TG15 is a capable tweeter at any price but it will run out of steam early with an xover lower than 2k 2nd order. You don't need disco levels to hear odd order HD when pushing a 25mm dome crossed this low - even just beyond 95 dB with lower midrange heavy harmonics you'll hear issues. Just play a female vocal or piano track at an average satisfying level and I bet you will hear the tweeter announce itself in a not so good way. This is a pet peave of mine with 2 way setups having lower xover points. Some of the Morel HF domes will cope with 2k 2nd order xovers, but most cheap 1 inch domes won't.
It's good but boring advice to seek used monitors, but here are two more designs to look at, at least. Ported but you could stuff em.
https://www.diyaudio.com/community/...7tac-gb-2way-with-exceptional-clarity.390687/
https://www.audioexcite.com/?page_id=2386
Goran from audioexcite stresses that listening distance is an important factor. Most DIY speaker designs are not balanced for nearfield at all.
https://www.diyaudio.com/community/...7tac-gb-2way-with-exceptional-clarity.390687/
https://www.audioexcite.com/?page_id=2386
Goran from audioexcite stresses that listening distance is an important factor. Most DIY speaker designs are not balanced for nearfield at all.
Before I address the issue of the BC25TG15 crossover in my Lark-SM, let's take a closer look at the Distortion measurements form HiFi compass.
Note that the sweep is done from 100Hz to 20kHz at 2V.
From the Blue plot,, one can easily be misled into thinking that the BC25TG15 must be crossed above 2.5kHz to avoid distortion.
That is a wrong conclusion. Reason being that the lower frequencies are causing the tweeter to distort.
To measure the distortion of any tweeters, a high pass filter must be used. This is very basic when designing speaker crossovers.
This is what is involved in tweeter distortion measurements.
1) decide on your HP corner frq.
2) decide on the order (1st, 2nd,3rd, fourth).
The lower the corner frq, the more the midrange will enter the tweeter. When that happens, the higher the risk of distortion.
To avoid that, use a steeper crossover.
After you've decided on the above, do a distortion sweep.
You'll find that most modern tweeters have very low distortion when operated within their specs.
Obviously if one pumps 30W into a dome tweeter, it will not only distort but probably fry the voice coil.
That is not the right way to use a hifi tweeter.
If one is crazy enough to play that loud in the home, use a compression driver with a horn.
That's what they are meant for.
Regarding the 1.5kHz crossover in the Lark-SM, there is more to it than that.
I will post later on how and why it is done that way and how I got away from distorting the tweeter.
It is not so straight forward.
Hi ! did you measure the dip ? did you check the tweeters ? Behringer is not ATC but this sounds weird
if you like concentric the Tannoy Gold series look interesting But they are ported
Hi thank you very much for your very valuable reply
This tells me 2 things 1) rooms can have a very nasty impact on speakers performance 2) even cheap monitors can be quite flat
However if you put together two better drivers you could use the plate amps for building a better speakers
You can use the original speakers as passive adding a passive xover
Good luck with your projects !
This tells me 2 things 1) rooms can have a very nasty impact on speakers performance 2) even cheap monitors can be quite flat
However if you put together two better drivers you could use the plate amps for building a better speakers
You can use the original speakers as passive adding a passive xover
Good luck with your projects !