Just built this portable speaker using a Seas L12RE/XFC coaxial unit. I followed the application note from seas, but had to reduce the volume to 2.2 litres to get the size I wanted. Battery pack and tripath TA2021 inside. It plays really nice, but not too loud, could do with some more power, but in most cases it's enough. I run it off my iPhone and on some music the poor audio output on the iPhone is really noticeable. Next step would be a DAC that is iPhone compatible. But still this plays way better than any commercial portable loudspeakers of similar size I have heard.
Some pictures.
Some pictures.
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Very nice!
Too bad the efficiency of the woofer is not higher. But it's a 4" designed to work well in very small enclosures. Seas has put a lot of know-how into this coax and I do not doubt they sound excellent. Have fun.
Too bad the efficiency of the woofer is not higher. But it's a 4" designed to work well in very small enclosures. Seas has put a lot of know-how into this coax and I do not doubt they sound excellent. Have fun.
Have been wondering about this driver too.
Do you feel the coaxial tweeter sounds and images markedly better than a similar 2-way utilizing a 5inch mid-bass woofer with non-coaxial tweeter crossed at the same 2KHz and placed very closely to the woofer on the baffle ?! Is the coaxial worth its cost.
Also which battery pack are you using small enough to squeeze inside the small cabinet.
Thanks 🙂
Do you feel the coaxial tweeter sounds and images markedly better than a similar 2-way utilizing a 5inch mid-bass woofer with non-coaxial tweeter crossed at the same 2KHz and placed very closely to the woofer on the baffle ?! Is the coaxial worth its cost.
Also which battery pack are you using small enough to squeeze inside the small cabinet.
Thanks 🙂
Well regarding how it images, does it not really need to be stereo to image good? I have not compared it to any similar size small speaker with a midbass and a tweeter. I can say that it sounds very good, and the highs are definately better than my bedroom stereo speakers with tangband w3-1878 full range. And the bass goes lower too, but the w3-1878 might go just as low in a bigger box (i use them in 3.6 liters)
The reason for choosing the seas, was that they play down to 60Hz in a 2.5 liter box. I have not been able to find any other 4-5" that will do that. All at the expense of efficiency. But still enough for portable use.
I use 10 Nimh AA cells rated at 2700 mA. The batteries lasts for weeks, when i use it occasionally. I would estimate it could handle atleast 10 hours continiously at low to normal listening levels.
The reason for choosing the seas, was that they play down to 60Hz in a 2.5 liter box. I have not been able to find any other 4-5" that will do that. All at the expense of efficiency. But still enough for portable use.
I use 10 Nimh AA cells rated at 2700 mA. The batteries lasts for weeks, when i use it occasionally. I would estimate it could handle atleast 10 hours continiously at low to normal listening levels.
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