This is an Apogee Groove portable USB DAC and headphone amplifier for Mac or PC. It is the original Groove, not the Anniversary edition. The unit has been fully tested: it connects over USB, is recognized by the computer, the status LEDs light up blue and green as shown in the photos, the volume buttons respond correctly, and the 3.5 mm headphone output drives headphones as it should.

Cosmetically it is in good used condition with some light surface wear and small marks from normal use. No cracks or major damage. The 3.5 mm headphone output jack is clean and holds the plug snugly.

Included in this lot:

• Apogee Groove USB DAC headphone amp

• USB 2.0 cable (USB-A to micro USB)

• 1/8 inch (3.5 mm) male to 1/4 inch (6.35 mm) female headphone adapter

Key features / specs (from Apogee’s published information):

• Portable USB DAC and headphone amp for Mac and PC

• USB 2.0 connection, bus powered (no external power supply needed)

• Up to 24-bit / 192 kHz audio resolution

• ESS Sabre DAC

• Constant Current Drive technology for smooth frequency response with many types of headphones

• Quad Sum DAC: 4 DACs per channel for high dynamic range and low distortion

• Asynchronous clocking

• Dynamic range: approx. 117 dB (A-weighted)

• Frequency response: about 10 Hz – 20 kHz, ±0.2 dB

• Maximum output power: about 225 mW into 30 Ohm, 40 mW into 600 Ohm

Great little unit if you want to upgrade the sound from a laptop or desktop and drive quality headphones from a compact metal DAC/amp that fits in a pocket.

Pictures are part of the description. All items are being sold “AS Found – AS IS”.

DO NOT ASSUME SOMETHING IS INCLUDED THAT IS NOT PICTURED.

What you see is what you will receive.

You can always provide your own shipping label, if you feel like you can get a better price. Just message me before purchase and I will send you size and weight of the package.

Feel free to ask questions and request additional pictures and videos if needed.

I am not an expert in many of the items offered. I make every effort to point out any obvious problems and test it to the best of my knowledge. Please keep in mind the age of the item and that there may be some slight flaws from time to time.

Please research the item with the manufacturer to ensure compatibility with your needs. I will accept returns if the product was damaged during shipping, or if it does not work as it should. Talk to me — I always try to resolve any reasonable concerns to make it right.

It will be carefully packed and shipped with a tracking number.