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Little Labs Monotor 2-channel Headphone Amplifier - Limited-edition Black

Headphone Amplifier with Audiophile Circuit Topology, Separately Amplified Dual 1/4" and 1/8" Headphone Jacks, XLR/TRS Combo Jack Inputs, and Stereo Mini Aux Input - Limited-edition Black
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Item ID: MonotorBlk
Little Labs Monotor 2-channel Headphone Amplifier - Limited-edition Black
Price:$580 and 00 cents
Special Financing - Ends Aug 2, 2026. $17/month with 36 month financing*

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Little Labs Monotor 2-channel Headphone Amplifier - Limited-edition Black
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Price:$580 and 00 cents
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Pure Sound for Your Headphones

With more and more music consumed via headphones and earbuds, you need a headphone amp that can keep up. Enter the Little Labs Monotor. This handy 2-channel headphone amplifier has garnered many fans here at Sweetwater due to its low-noise circuit design. Its signal path is almost completely passive and minimalistic, with the exception of a single active stage on each channel. The simplified design and high-quality voltage regulation guarantee the Monotor accurately reproduces any audio signal you throw at it. You get two 1/4-inch headphone jacks and a pair of separately amplified 3.5mm headphone jacks, so you never have to find a missing headphone adapter. Adjusting the volume is easy, too, thanks to the stepped volume knob. Finally, this headphone amp includes left-plus-right, left, right, and left-minus-right settings for checking phase and analyzing artifacts. Order yours now and hear every bit of audio through your headphones.

Low-noise, high-headroom circuitry

Put simply, the Monotor’s circuit topology is a stroke of genius. This headphone amplifier uses a minimalistic circuit design to prevent extraneous noise from entering the signal. The circuit uses a single active stage per headphone output. Otherwise, the circuit is entirely passive and clean, thanks to low-noise linear voltage regulation. The Monotor gives you a dramatically improved dynamic range without the hiss supplied by other headphone amplifiers. Choose a Monotor headphone amplifier and enjoy a more accurate sonic presentation of your source material.

No more annoying adapters

There are few things more annoying than needing a headphone adapter and not having one. That’s why the folks at Little Labs outfitted the Monotor with two pairs of headphone outputs. You get two traditional 1/4-inch TRS headphone jacks and two 3.5mm headphone jacks — all mounted to the front panel. The 1/4-inch and 3.5mm jacks are separately amplified for a cleaner signal. You can use any combination of headphones with the Monotor. And the best thing? You’ll never have to go digging for a headphone adapter ever again.

Little Labs Monotor 2-channel Headphone Amplifier Features:

  • 2-channel headphone amplifier for discerning listeners
  • Minimalistic circuit design gives you a precise, reliable, and high-fidelity sound
  • Flexible inputs let you connect the headphone amp to any setup
  • Extensive monitoring options are ideal for checking stereo cohesion, phase issues, or artifacts from digitally compressed files
  • Stereo/mono function switch lets you listen in any way you like
  • Separately amplified 1/4-inch and 3.5mm jacks supply exceptional sound for all headphones
  • Stepped volume attenuator offers repeatable settings
  • Compact chassis saves space in the studio
  • Bypassable volume knob offers easy remote control

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Tech Specs

  • Type: Headphone Amp
  • Input Channels: Stereo, Dual mono
  • Analog Inputs: 2 x XLR-1/4" combo, 2 x 1/4" TRS (In/thru parallel with XLR combo), 1 x 1/8" (aux in)
  • Headphones: 2 x 1/4" TRS, 2 x 1/8" TRS
  • Controls per Channel: Stereo Level control, stereo/mono function switch (stereo, stereo reverse, mono, left only, right only, phase)
  • Form Factor: Desktop (four units can be rackmounted in 1U space)
  • Manufacturer Part Number: MONOB

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Reviews

An Excellent Amp
This amp made a huge difference in the quality of what I'm hearing, even when running the exact same material over the same headphones and speakers I already had. For context, my headphones actually had a higher impedance rating than the maximum recommendation of my interface, but the monitors were powered and capable.

The sound is far more spacious than before, as if the entire field is more widely and deeply spread out, and though there seems to be even more detail and accuracy than before, it isn't at all fatiguing, overly clinical, nor harsh. Rather, the overall sound is outright pleasant and enjoyable, even in the "cleanup phases" of subtractive EQ and tone balancing. Coupled with the added features for checking different aspects of the stereo image and mono compatibility, this one's a winner in my book.
Music background: Musician/Producer