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2. iPod Hi-Fi - Wikipedia

   en.wikipedia.org/wiki/IPod_Hi-Fi

   iPod Hi-Fi is a discontinued speaker system that was developed and manufactured by Apple Inc. and was released on February 28, 2006, for use with any iPod digital music player. [1] The iPod Hi-Fi retailed at the Apple Store for US$ 349 until its discontinuation on September 5, 2007.

3. Lightning (connector) - Wikipedia

   en.wikipedia.org/wiki/Lightning_(connector)

   Apple offers various adapters that allow the Lightning connector to be used with other interfaces, such as 30-pin, USB, HDMI, VGA, and SD cards. The Lightning to 30-pin adapter supports only a limited subset of the available 30-pin signals: USB data, USB charging, and analog audio output (via the DAC inside of the adapter [27]).

4. Digital-to-analog converter - Wikipedia

   en.wikipedia.org/wiki/Digital-to-analog_converter

   Switched capacitor DAC contains a parallel capacitor network. Individual capacitors are connected or disconnected with switches based on the input. The R-2R ladder DAC which is a binary-weighted DAC that uses a repeating cascaded structure of resistor values R and 2R. This improves the precision due to the relative ease of producing equal ...

5. Sound card - Wikipedia

   en.wikipedia.org/wiki/Sound_card

   Close-up of a sound card PCB, showing electrolytic capacitors, SMT capacitors and resistors, and a YAC512 two-channel 16-bit DAC. [1] The integrated circuit on the left is a 3403 single power supply quad operational amplifier. Sound cards use a digital-to-analog converter (DAC), which converts recorded or generated digital signal data into an ...

6. iPod - Wikipedia

   en.wikipedia.org/wiki/IPod

   The official policy was that the customer should buy a refurbished replacement iPod, at a cost almost equivalent to a brand new one. All lithium-ion batteries lose capacity during their lifetime even when not in use [136] (guidelines are available for prolonging life-span) and this situation led to a market for third-party battery replacement kits.

7. iPod Mini - Wikipedia

   en.wikipedia.org/wiki/IPod_Mini

   The battery life for the first generation iPod Mini was criticized for its 8 hour duration, [8] similar to the third generation iPod that was available at the time. Apple addressed this problem in the second generation models by increasing the battery life to about 18 hours, at the cost of removing the FireWire and AC adapter cables to avoid ...