Mobile Streaming Box with Up2Stream 2.1

I have built myself a little 9L ported subwoofer box
with a random 6" subwoofer. (spoiler: this one died after the first rave^^)

I took two old flat-TV speakers for the upper frequencies.

looking quite nice so far…

structure painting…

delivery day…
Power supply is MeanWell LRS-150-24

bring into position…

voltage looks good…

grab some cables…

tuning…
the two little 2 ohm speakers were too loud and too much midrange…

optional battery pack - lasting for a long evening at moderate volume.

well ventilated…

very handy…

but the first mission at full volume for some hours didn’t end well - rattling sound from the sub…
opening this box was a pain in the a…

burn motherfucker… burn!

20210802_170638~2

ordered an Omnes Audio SW 6.01…

the coil seems more powerful to me…

20210807_065027~2

glued and screwed…

looking better than before…

double checking…

wish me luck… :grinning:

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After new year party the tweeters smelled very toasted… but I was lucky to have another pair of the little smart tv speakers.

In ACP Workbench I raised the limit frequency for the tweeters to 1800 Hz hoping that they live longer now.

The difficult thing was to get more midrange out of the woofer instead. I tried it with a high shelv filter for the woofer at 700 Hz. I found no ohter way to set a better crossover frequency between sub and tweeter. Maybe someone knows?

Last but not least I decided to add nice grills to the membranes for protection.

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Great work, thanks for the sharing. I dont’ have the clever hand to craft, but glad to see various projects. Have fun :slight_smile:

The box is still playing very fine. After doing this modification I was able to set the crossover frequency to 2200Hz:

Using ACP Workbench I set up a "save"profile with a DRC working as a limiter. Switching to that profile I don’t have to worry about people raising up the volume too hard.

Finally I added a status LED to the front.


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Here’s another arylic up2stream2.1 boombox with a smaller subwoofer (omnes audio SW 5.01)
This time the battery and charging circuit is included in the box. External power supply 24V, 6,25A.


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Could you share more on the components and pinout you used for the LEDs?

I can’t get mine to perform how it’s supposed to. Common cathode NOR common anode seem to work, and somehow the light for “wifi” is persistently on regardless of the input setting the amp is on.

This is the connector I connected the wires to. The left with the red coating is the +wire. The others are the -wires according to their LED color.

Hope this helps a little.


I forgot to draw in the current limiting resistors :upside_down_face:

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