Used Mayflower Electronics Objective O2 Headphone Amplifier ???? Comes with the 15 VAC power cable ???? It has a metal volume knob I’m also including a 10ft balanced 3.5mm aux cable Will ship out the same day ????

This is a combination of the original production run of JDSLabs ODAC revB and O2 Amplifier. I believe these units are no longer in production. Purchased on Drop.com 8 years ago, flawlessly running since then. Hundreds of hours of burn-in time. Note the adapter for the amp could use some love, as it’s taped closed right now. Volume pot occasionally scratches on the amp as well. Overall would say these are in “good condition”, totally working with many years of service to go. Will include RCA cables, USB cable, and charger alongside both units.

JDS Labs O2 (Objective 2) Headphone Amplifier & OL DAC USB edition in good condition. Comes with power cords, RCA-to-headphone jack cable, and a USB cable. Thanks for looking!

This is a listing for both a JDS Labs OL DAC and the O2 Headphone Amplifier. Only power adapters are included, there are no additional cables. These units have cosmetic damage such as the paint scratching seen in the photos. They are both fully functional and tested. OL DAC Specification: DAC Performance Frequency Response 10Hz-20kHz (96k) +/- 0.15dB THD+N 20Hz-20kHz < 0.001% IMD CCIF 19/20 kHz -6.03 dBFS 0.00033% IMD SMPTE -6.03 dBFS 0.00031% Noise (A-Weighted) -109 dBu Dynamic Range (A-Weighted) 114 dB Linearity Error -90 dBFS +/-0.01 dB Crosstalk -10 dBFS 100K RCA -108 dB USB Jitter Components 11025Hz -116 dB PCB Stackup 4 Layers Maximum DAC Line-Output, 100K 2.00 VRMS Dimensions Case Dimensions 4.27 x 3.15 x 1.16 in Weight 13 oz Data Support Audio Formats (USB) 16/44.1kHz thru 24/96kHz USB Interface USB Audio Class 1 (UAC1) USB Driver OS Support Windows XP/7/8/10, PS4, OS X, iOS, Linux Connectivity Digital Inputs USB DAC Line-Output RCA O2 Headphone Amplifier: Performance Frequency Response +/-0.1 dB (20Hz-20kHz) THD 1 Khz 150 Ohms 0.0016% IMD CCIF 15 Ohms 0.001% IMD SMPTE 0.002% Noise (ref 400 mV) -105 dB Max Output (33 Ohms) 613 mW Max Output (150 Ohms) 355 mW Max Output (600 Ohms) 88 mW Output Impedance 0.54 ohms Crosstalk (15 ohms) -65 dB Channel Balance (50% volume) 0.6 dB Dimensions Case Dimensions (mm) 108.50 x 80.00 x 29.50 Case Dimensions (in) 4.27 x 3.15 x 1.16 Weight 11oz Connectivity Input RCA Output 6.35mm (1/4) 14-20VAC Configuration Gain 2.5x and 6.5x Volume Potentiometer Taper Alps 15A

JDS Labs O2 (Objective 2) Headphone Amplifier & OL DAC USB edition in good condition. Comes with power cords, RCA-to-headphone jack cable, and a USB cable. Thanks for looking!