Home Amps JDS Labs ATOM Amp Review – Behold! The Power Of ATOM!

JDS Labs ATOM Amp Review – Behold! The Power Of ATOM!

by Stuart Charles Black

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Greetings bloke and Welcome aboard!

Stuart Charles here, HomeStudioBasics.com helping YOU make sound decisions leading to a beautiful audio experience that will make you fall in love with music (NOT gear) all over again, so…

In The Box


16VAC Power Adapter


  • Price: Check JDS!
  • Frequency Response, 20Hz-20kHz: +/- 0.01dB
  • SINAD @ 2VRMS, 1kHz: 119 dB
  • SINAD @ 50mV, 1kHz: 90 dB
  • SNR (20-20kHz): > 122 dB
  • IMD SMPTE: -95 dB
  • Noise (20-20kHz): 1.99 μV
  • Crosstalk @ 10kHz 150 Ω: -92 dB
  • Input Impedance: 10k Ω
  • Output Impedance: < 0.7 Ω
  • Channel Balance: < 0.6 dB
  • Headphone Output: 6.35mm (1/4″)
  • Analog Inputs: RCA and 3.5mm
  • Preamp-Output: RCA
  • Case Dimensions 5.0 x 5.5 x 1.4 in
  • Weight 9.3 oz
  • Dual Gain: 1.0x and 4.5x
  • Volume Potentiometer Taper: 15A, Hand Matched Gangs


JDS Labs Atom

ATOM with some of his friends.

Well, I didn’t have an official ATOM review and figured now would be as good a time as any to make one, especially considering how often I recommend it.

My previous go-to neutral/clean amp recommendation was the Objective 2 from you guessed it, the same company in JDS Labs.

They’ve since discontinued that one which I’m kind of sad about, but it is what it is. The good news is that the ATOM fixed some of the minor (but still kind of irritating) things about the Objective 2 – namely its weird choice of connection locations and overall implementation.

For example, the Objective 2’s line input and power input jack were on the front and it made everything really awkward to set up. Don’t believe me?

Take a look at this image:

JDS Labs Atom vs. Objective 2

Or this one:

or this one:

JDS Labs Objective 2 + DAC Magic 100I think you get the idea.

All of the main connections are on the back this time and are much easier to work with.

But how does the ATOM stack up with the old O2 otherwise?


Let’s address the elephant in the room first.

I hate to say it, but The ATOM comes in at a rather paltry 9.3 Oz. and feels rather flimsy in your hand – nothing like the robust, rock-solid feel of the original Objective 2.

It’s made of mostly plastic this time around, and pressing the buttons isn’t nearly as satisfying as it once was.

The unit doesn’t move around on your desk per se, but it’s definitely more unstable than the Objective 2 and you may have to use your other hand to hold it as you’re adjusting the volume.

Oh well.

There aren’t many other websites that will be quite as honest about it, so take it for what it’s worth.

Fortunately, the gripes pretty much end there as far as I’m concerned.

Front Panel

On the front we’ve got the Volume potentiometer, 1/4″ headphone jack, gain button as well as the input button.

Back Panel

The input button essentially cycles between the RCA outputs or RCA inputs on the back as the ATOM can be used as a Preamp into separate speakers/monitors such as my Presonus Eris e3.5s.

Because it’s just an Amp, you’ll need to use a separate DAC and connect it to the ATOM with either RCA to RCA cables or RCA to mini (3.5mm).

This entirely depends on the DAC in question, but when I demoed the ATOM I used a DragonFly Red, FiiO K3 and RCA to 3.5mm as pictured below:


Any DAC with RCA outputs or 3.5mm line output will work here.

Some other examples include a FiiO K5 Pro, JDS’ own ATOM DAC, a Zen DAC, a DragonFly Red, DAC Magic 100 (pictured earlier), etc.

As A Preamp

Back when I demoed the ATOM, I didn’t have my Presonus Eris e3.5s yet, but I’ve been really enjoying them with an array of different setups.

Just make sure whatever speakers you utilize have RCA inputs or line input and are Active Speakers rather than Passive.

Passive speakers basically need a separate amplifier or receiver to run, while Active speakers do not. Related: Passive vs. Active Speakers: Which Are Best For YOU?

Power Output & Sound

One reason why the ATOM remains a mainstay recommendation when people ask me for help is that not only is it affordable, but it’s also very neutral and clean sounding.

The original Objective 2 boasted an Output Impedance of <0.1 but still somehow managed not to sound completely cold, overly sterile, and/or lifeless.

This time around, JDS has opted for a slight increase to around <0.7, but you probably aren’t going to notice much of a difference in terms of it being less neutral than its predecessor.

It’s still incredibly clean, neutral, and sounds great with any headphones you might have, so don’t freak out about it. Related: What is Output Impedance?

The ATOM is also a great value is because of its power output.

Let’s take a look:

  • Max Continuous Power @ 600Ω 136mW (9.05VRMS)
  • Max Continuous Power @ 150Ω 545 mW (9.04VRMS)
  • Max Continuous Power @ 32Ω 1 Watt (5.66 VRMS)

I appreciate that JDS Labs specifies Continuous power rather than peak power.

A lot of companies out there do NOT differentiate between them on spec sheets and I find it to be rather deceptive, especially since many folks aren’t even aware of the difference and would never know unless you pointed it out. Related: RMS Power vs. Peak Power In Headphone Amplifiers

In any event, the ATOM is well equipped and provides more than enough power for 99.9% of headphones.

The majority of the time I’m not even using the gain button but if you’re anything like a typical snobby audiophile, you’ll really appreciate the added headroom and peace of mind.

Continuing the tradition of clean sound, the ATOM ensures that the music you’re hearing is as neutral and honest as possible.

Output Impedance

Seeing what all the commotion is about.

Due to its low output impedance, you can also expect it to deliver roughly the same output into any load (your headphone).

In other words, the device’s ability (in this case the ATOM) to deliver unrestricted current or power when passing a musical signal to your ears.

This is one of the biggest reasons why higher output impedance sources (like receivers for example) can sometimes radically alter the way music sounds – and not always in a good way.

This also brings Tube amps into the equation, but that’s a can of worms for another day.

Just know and understand that I recommend the ATOM a lot because of its ability to realistically and honestly portray the music in its most raw and genuine state – without any details or artifacts missing.

Low-ish output impedance is also important because of what we just touched on – that is, there are hundreds of different types of headphones out there all with varying Impedance and Sensitivity ratings.

A low output impedance amp means your experience listening to music will be much more consistent and won’t vary wildly depending on the headphones you’re using.

Potential Downsides

As nice as it is to have an amp like this, it’s not all sunshine and rainbows.

One of the main reasons why low output impedance isn’t always ideal is due to source discrepancies.

In other words, how well the music was recorded, mixed, and mastered.

If the quality of the source is poor, an amp like the ATOM, in conjunction with your headphones, will absolutely reveal that and it might not make for a very pleasant experience depending on who you are.

The flip side is that sometimes it can really enhance the experience and you may even enjoy those quirky errors and abnormalities in the track.

So in short, tube amps sometimes mask errors and subtle artifacts in recordings while solid-state amps like the ATOM most certainly do not.

As far as matching, most of the time, I’d say the majority, you won’t have to worry about it.

As long as the headphones in question are about 10x higher in impedance than the amplifier, you’re not going to lose out on any of the energy that the music provides and won’t be stressing out the amp.


Considering everything we’ve discussed today, the only thing left to mention is the price.

Would you believe that after all that, the ATOM is only about $100?

Hard to believe, isn’t it?

Yes, you’ll have to pair it with a DAC, so snag the ATOM DAC and be on your merry way.

With this setup, you can also run an optical cable into something like a PS4 and use the setup for gaming/film as well.

Final Word

JDS Labs ATOM Amp Review


The ATOM represents everything I love about entry-level products and it’s something I’ve recommended a lot over the last few years. Why? Because it’s an incredible value and sounds excellent.

I’m still recommending it today as a budget solution that doesn’t sound budget.

In short, it’s a fantastic product that’s stood the test of time and likely will continue to as we move forward into the audiophile rabbit hole of oblivion that we’ll never ever be able to come back out of, ever.

FoLlOw mE!


Well that’s about it for today my friend! I hope you’ve enjoyed this JDS Labs ATOM Review and came away with some valuable insight.

Questions? Comments? Requests? Did I miss the mark on something? Please let me know down below or Contact me!!

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Does the ATOM sound like a can’t-go-wrong purchase? I would love to hear from you. Until next time…

All the best and God bless,





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