No longer for sale here. Went to Ebay. Thanks!
I have a used Ack! Industries dAck! 2.0 with Ultra Resolution option. Great sounding battery powered non-oversampling DAC; 16-bit, up to 96kHz. I purchased used. From the previous owner "The batteries were replaced in 2014 with very little use since then". It includes original box, manual, charger, and coax cable with RCA adapter.
I'ved used it for over 6hours with the battery with no issues. The battery is supposed to last 8 hours, but recommended that you only use it 4 hours a day.
Its a really neat unit if you don't know much about it. The charger stays plugged it and when you turn it on, it stops charging and when you turn it off, it starts charging - so you don't have to worry about plugging it in and out to charge. Just use it as a regular component. Of course they recommend only using it 4 hrs on a charge to maintain battery health. You can change out the battery - just order form their website.
I find the DAC to have a quiet, detailed, and smooth sound. Its a great example of NOS DAC.
[Price removed since it is no listed on ebay] I only ship within the USA. Please let me know if you have any questions.
Location: I'm in San Francisco, CA.
References: ebay handle: hk29 with 100% rating (292 feedback)
http://www.ebay.com/usr/hk29
