This is the JDS Labs Objective2 + ODAC Combo Rev B (https://jdslabs.com/product/objective2-odac-rev-b/), which retailed for >$200. It is also known as the O2+ODAC. It includes both a headphone amplifier AND a digital-to-analog converter (DAC) for converting from USB digital signal to analog output. For comparison, it has been succeeded by the JDS Labs Element IV, which retails for $499. Details: Analog Output: 3.5mm or 6.35mmAnalog Input: 3.5mmDigital Input: Mini-USBDAC Line Output: 3.5mm or RCA

This unit was donated to our annual charity fundraiser where all proceeds will go. Amplify your sound with this JDS LABS O2 objective2 Headphone Amplifier. With its TRS/Audio Jack and AUX audio inputs, you can easily connect it to your favorite devices and enjoy high-quality audio. The headphone jack audio outputs provide a comfortable and immersive listening experience. This black headphone amplifier is perfect for home audio and TV, video & home audio enthusiasts. Its brand, AMP, ensures high-quality and durability. Get this amazing headphone amplifier today and enhance your audio experience.

Used JDS labs O2 headphone amplifier. This version has an option to install 2 rechargeable 9v batterys (batterys are NOT included). Works well. I did enjoy it. Look at reviews online. I am selling it because I have no need for it. Thank you for viewing.

Entry-level but also good enough to not have to think about it for a long, long time. This combo is a JDS OL DAC, which goes from USB to RCA line-level outputs, a basic hosa RCA to headphone cable, and a JDS-labs built O2 headphone amp. It served me for many years with no issues. It will drive almost any headphones well. (You probably already know if you have exotic, low sensitivity stuff.) Condition as pictured, and very good overall. Writing on the adapters to keep them straight. The internal batteries in the O2 have been removed, because they went bad from old age. An enterprising person could replace them, theyre just 9V Ni-MH with normal connectors inside. Original MSRP on the DAC was $99, original on the amp was $149.

Entry-level but also good enough to not have to think about it for a long, long time. This combo is a JDS OL DAC, which goes from USB to RCA line-level outputs, a basic hosa RCA to headphone cable, and a JDS-labs built O2 headphone amp. It served me for many years with no issues. It will drive almost any headphones well. (You probably already know if you have exotic, low sensitivity stuff.) Condition as pictured, and very good overall. Writing on the adapters to keep them straight. The internal batteries in the O2 have been removed, because they went bad from old age. An enterprising person could replace them, theyre just 9V Ni-MH with normal connectors inside. Original MSRP on the DAC was $99, original on the amp was $149.

Entry-level but also good enough to not have to think about it for a long, long time. This combo is a JDS OL DAC, which goes from USB to RCA line-level outputs, a basic hosa RCA to headphone cable, and a JDS-labs built O2 headphone amp. It served me for many years with no issues. It will drive almost any headphones well. (You probably already know if you have exotic, low sensitivity stuff.) Condition as pictured, and very good overall. Writing on the adapters to keep them straight. The internal batteries in the O2 have been removed, because they went bad from old age. An enterprising person could replace them, theyre just 9V Ni-MH with normal connectors inside. Original MSRP on the DAC was $99, original on the amp was $149.

JDS Labs O2 amplifier and ODAC standalone digital audio converter. These are the original versions released in 2012. Excellent pre-owned condition. Includes original Triad AC adapter and USB cable.

More information about this item: https://www.techpowerup.com/review/jdslabs-o2-odac/

Both are fully functional with only a bit of cosmetic wear! This is an amazing combo at any budget and provides a beautiful, transparent sound to your headphones!

This Jds Labs O2 Headphone Amp is the perfect addition to your audio setup. Designed for serious music lovers, this amplifier delivers clear and powerful sound. Made by O2, a trusted brand in audio equipment, this amplifier is sure to impress. No cables included

O2 Headphone Amplifier Distributed By JDS Labs This amplifier is in good working condition- please view all photos for exact condition. Any purchased item can be picked up at Silas Deane Pawn Cromwell CT 06416Please notify us on all pick up orders so it doesnt get shipped by accident. We strive for 5 star feedback.If for any reason you are not happy with your purchase,please contact us before leaving feedback.Our goal is to make every customer happy

NwAvGuy designed and still going strong. Need a higher end set of cans (see my other listing) to truly appreciate the quality. Battery still holds a charge though never used off of computer desk. Will combine shipping.

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 Headphone Amplifier With Integrated ODAC, Desktop DAC AMP USED.

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!

JDS Labs O2 Amplifier. Phono sockets on rear, 3.5mm headphone output to front. Mark Grant G1500HD 0.75m interconnects and power supply included. No original box, but will be packed well.