Currently unavailable.
We don't know when or if this item will be back in stock.

Genuine National JDSLABS Objective2 Black Edition By NwAvGuy Headphone Amplifier JDS LABS (Made in USA)

3.3 out of 5 stars 30 ratings

Currently unavailable.
We don't know when or if this item will be back in stock.
    This fits your .
  • Make sure this fits by entering your model number.
  • Gain: 2.5x and 6.5x
  • Frequency Response: +0.01, -0.01 dB (20Hz-20kHz)
  • Output impedance:0.5 ohm Volume Potentiometer Taper: 15A or 3B
  • Power:14-20V AC adapter with a standard 5.5 x 2.1 mm(not DC adapter). You can charge 9V battery inside from AC Jack and carry this amp.
  • Size: 108.50 x 80.00 29.50 x mm Weight: 311g Accessories: cleat rubber/adapter

Special offers and product promotions

Have a question?

Find answers in product info, Q&As, reviews

There was a problem completing your request. Please try your search again later.
All Product Information Customer Q&A's Customer Reviews

Your question may be answered by sellers, manufacturers, or customers who purchased this item, who are all part of the Amazon community.

Please make sure that you are posting in the form of a question.

Please enter a question.


Compare with similar items


Genuine National JDSLABS Objective2 Black Edition By NwAvGuy Headphone Amplifier JDS LABS (Made in USA)
Monolith Liquid Spark Headphone Amplifier - by Alex Cavalli with RCA Input, Single 1/4 Output 1.3Watt@50R, 108Db
Mayflower Electronics Desktop Objective2 ODAC Rev B.
FiiO K5 Docking Headphone Amplifier/DAC, Titanium
FiiO E10K USB DAC and Headphone Amplifier (Black)
SMSL Audio M3 USB Powered Audio Decoder, Black
Customer Rating 3.3 out of 5 stars (30) 4.5 out of 5 stars (148) 4.6 out of 5 stars (31) 4.1 out of 5 stars (109) 4.2 out of 5 stars (2417) 4.2 out of 5 stars (111)
Price Unavailable $129.99 $259.00 $206.54 $69.99 $83.99
Sold By Amazon.com MayflowerElectronicsAudio HFC Lotus Inc Tinbel Store Game Corner US
Item Dimensions 4.27 x 3.15 x 1.16 inches 11.10 x 7.30 x 2.80 inches 4.00 x 4.25 x 1.50 inches 4.72 x 5.12 x 2.17 inches 3.11 x 0.83 x 1.93 inches 4.00 x 4.50 x 2.50 inches

Product description

The Objective2 (O2) is an open source headphone amplifier designed by NwAvGuy, with emphasis on benchmark performance and low cost. This item includes a fully assembled and hand tested O2 amplifier, ready for use. You will only need an AC adapter suitable for your region. The O2 has created a stir in Head-Fi.org’s do-it-yourself community. After being banned from Head-Fi for heated discussion, he proceeded to design O2 for maximum benchmark performance to prove his points. It’s large and heavy, so hardly worth consideration as a portable amp, however, O2 lives up to its name.


Product information


Customer Questions & Answers

Customer reviews

3.3 out of 5 stars
3.3 out of 5
30 customer ratings
How does Amazon calculate star ratings?
Reviewed in the United States on May 27, 2017
Verified Purchase
9 people found this helpful
Comment Report abuse
Reviewed in the United States on February 26, 2018
Verified Purchase
4 people found this helpful
Comment Report abuse
Reviewed in the United States on January 2, 2017
Verified Purchase
20 people found this helpful
Comment Report abuse
Reviewed in the United States on December 17, 2019
Verified Purchase
2 people found this helpful
Comment Report abuse
Reviewed in the United States on July 9, 2019
Verified Purchase
Reviewed in the United States on May 25, 2014
Verified Purchase
4 people found this helpful
Comment Report abuse
Reviewed in the United States on May 20, 2016
Verified Purchase
2 people found this helpful
Comment Report abuse
Reviewed in the United States on April 23, 2016
Verified Purchase
2 people found this helpful
Comment Report abuse

Top international reviews

Ian Gough
5.0 out of 5 stars Great little box!
Reviewed in the United Kingdom on April 2, 2015
Verified Purchase
7 people found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
Paul Fallon
5.0 out of 5 stars Five Stars
Reviewed in the United Kingdom on April 9, 2017
Verified Purchase
One person found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
JADE.
5.0 out of 5 stars 使い勝手は悪いが音質はトップクラス
Reviewed in Japan on August 20, 2014
Verified Purchase
14 people found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
楊秋実
5.0 out of 5 stars 音質はすごく綺麗
Reviewed in Japan on October 18, 2013
Verified Purchase
13 people found this helpful
Sending feedback...
Thank you for your feedback.
Report abuse
Pages with related products. See and discover other items: iphone dac, Best Rated in Headphone Amps, jds element