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My bad. Since it was for portable audio I naturally assumed you meant the amp9b which is designed for that.

Hammond 1590n1 (alternatively in black version) with flanged lid is highly recommended.

I'd recommend a charger with separate load and battery connector like the Phocos CIS series. That's even waterproof to several meters. With such a charger you don't have to have a battery connected...

Look in the Shop...

If we were to make one that works with a standard socket. A circuit could be made that sense if a contact is broken on a standard minijack socket with contact switches, and if broken awakes the amp.

The only way to eliminate the latter would be with a mini-jack socket with isolated tip switch that wakes the amp when the mini-jack is fully inserted (and turns it off immediately when removed). But...

v-bro, how about that auto-on sensing we talked about? Since it really only have to switch the awake pin, it should be relatively simple. The TA2020 uses 2.5uA in shutdown which is so little it'll...

The TA2020 is normally available here in the shop but it's out of stock currently.

No fear though. It's about the same €8 on ebay.de

I have to say though. With a 50W solar panel You need at...

I can't be certain in your case because the pictures aren't close up enough but hum is usually due to ground connections. Probably both your inputs and the heatsink is connected to the chassis which...

It's shutting down due to overload. See what gain setting you have because that might be the root of all your problems.

Naturally, had you posted hq pics as asked from the start that would have...

I'm starting to think the gain is set much too high for the fairly high output sources you have.

What is your input resistor and feedback resistor values?

I use Wima MKS02 series. They're cheap and just as good as the Epcos ones in my opinion. And the MKS02 series is 2.54mm lead spacing.

I completely agree. 1uF should be the absolute maximum value for the amp6, and in most cases an even lower value would be optimal. Like in the Boominator where it's a requirement of the design that...

No. It's a requirement and integral part of the design. Together with the input cap on the amp it helps to limit excessive cone excursions under the resonance frequency of the ports. And thereby...

I could make a long long list of lifepo4 batteries advantages over any other battery technology but there's no point. They are superior in every way except on energy density. Note that I also regard...

Not (practically) possible. USB is 5V 1A max. So you'd have to have a dc-dc converter to convert that to about 15V as needed for the charger. Even with that sorted with the losses in the battery,...

Boominator MINI - development thread

http://forum.speakerplans.com/boominator-mini-development-thread_topic74610.html

none are soldered in the kit

Automatic input sensing turn-on and shut-down would be much more useful though.

I've seen maybe 25-40 legitimate complaints in the time I have known 41hz.com (since November 2006). And I know that the order number has now exceeded 10000. So the costumer satisfaction ratio is...

Indeed it is. It's my primary candidate for a micro-Boominator.

2 drivers in an 8.5 liter sealed cabinet will perform exemplary for outdoors use (Q=1.207).

When you close the awake pin. You bring the amp out of sleep. The amp should draw 60mA when awake. Do not awake the amp without being loaded (attach speakers) and if you have no input you should...

Seeing that only Qts and Fs of the driver has effect on the series capacitor this could just as easily be done by reverse engineering the series capacitor cut-off frequency and calculating the input...

I don't recommend those. They are just "the best of the worst" meaning of all the Motorola replicas these are the least bad.

I should note that I with the help of a few friends have taken contact...

Up to and after this years Roskilde Festival, I've supported at least 7 different people, mostly DIY n00bs, that had trouble with this. Several which had burned of their amps in the process.

I...