Amplifiers

Objective2 Headphone Amplifier

This product has been discontinued. You might be interested in Atom Amp+.

Atom Amp+

$99.00

Covered by our 2-year transferable warranty
Custom model pictured, please read all options!

REFERENCE GRADE AMPLIFICATION

Objective2 is an opensource amplifier designed by brilliant engineer NwAvGuy, with emphasis on benchmark performance and low cost. Objective2 arrives fully assembled, hand tested, and ready to enjoy. Made in the USA.

Gallery

Features

REFERENCE GRADE SOUND

Objective2 achieves vanishingly low THD and noise performance for audible perfection.

LOW OUTPUT IMPEDANCE

Objective2's extremely low output impedance ensures transparent frequency response for all headphone loads.

POWER

At over 600mW, Objective2 provides enough output power to drive all dynamic headphones on the market with authority.

Customer Reviews

Apr 22, 2019

Just wanted to commend the excellent customer service; I emailed the DIY section with a query regarding my failed O2 amp and I thought the "we respond fast" header would get me a response in 24-48 hours, I was shocked to receive a response from a real person within 20 minutes!

Sam J.

Verified Buyer

Mar 13, 2019

My listening setup I am very happy with the sound. JDS Labs makes exceptional products!

Stephen A.

Verified Buyer

Dec 17, 2018

Enjoying my stack!!! @jdslabs

@pramodnundlall

Verified Buyer

Nov 5, 2018

"Just got my first amp. O2. Great, sturdy little powerhouse. It really opens the soundstage and makes audio fuller with my AKG 700s. I had mine customized as well. Great way to make your amp yours!"

Marlyece B.

Verified Buyer

Nov 5, 2018

Love the Objective 2 - awesome little amp!

Steve N.

Verified Buyer

Nov 5, 2018

From one diy project to another one... 🤓😎 Thanks @TheMagP1 & @jdslabs #O2Amp #ODAC #AIYProjects

@thwk_

Verified Buyer

Nov 2, 2018

I love so much your Objective2!! A masterpiece!

Loki C.

Verified Buyer

Nov 2, 2018

Just received my objective 2. Everything from packaging. Weight. Material and most of all the audio quality is 10/10. Even was caught off by the esd bag it was contained in. I'll be back for any possible audio needs

Daniel W.

Verified Buyer

Nov 2, 2018

My new custom Objective 2 is truly my new secret weapon for mixing university assignments. Sounds amazing with my 2i4 and K702 headphones. Thanks guys! :)

Dan M.

Verified Buyer

Nov 1, 2018

My Objective 2 works great, and looks good to. Dropped some coin on a nice little Topping rack for it on Amazon. Thanks so much again JDS! I'm getting a lot of compliments on the sound and look of the amp

Bolt V.

Verified Buyer

Nov 1, 2018

Great gear alert 🚨. No more hiss with my new O2 headphone amp from @jdslabs. #tinydesk concerts never sounded so good 🤩 🎧 🎶

@joshrogosin P.

Verified Buyer

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Specifications

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
Battery Run Time 6-8 Hours

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 3.5mm or RCA ^1.
Output 3.5mm or 6.35mm ^2.
Power Battery or 14-20VAC

Configuration

Gain 2.5x and 6.5x ^3.
Volume Potentiometer Taper Alps 15A
Batteries 2x9V LSD NiMH

^1. Custom input configurations are available
^2. Custom output configurations are available
^3. Custom gain configurations are available

Packaged Items

Genuine Objective2 Headphone Amplifier
15VAC Power Adapter
2x Tenergy 9V NiMH, Low-Self-Discharge Batteries
Rubber Feet

Instructions & Guides

JACK CONFIGURATIONS

Black Edition: Default configuration, featuring front mounted 3.5mm (1/8") headphone jack, 3.5mm input jack, and AC power jack.

Customize: Choose a 3.5mm or 6.35mm (1/4") headphone jack, front or rear mounted AC power jack, 3.5mm or RCA analog input jack, and custom gain levels. Customized units ship within 1 business day, exclusively in black!

AC ADAPTERS

Objective2 ships with one (1) free 15VAC Power Adapter. Add Objective2 to your shopping cart to select a plug style. US plugs accept 100-120VAC input. EU, AU, and UK plugs accept 220-240VAC input.