4-channel Headphone Amplifier
    Product # 615220
    4-channel Headphone Amplifier
    Product # 615220
    In Stock This item should ship today (10/27/2016) if ordered within 13 hours 54 minutes

    Volume Pricing (Log In to see Member Pricing)

    Volume Pricing

    Qty: 1 $30.44
    Qty: 2-9 $29.65
    Qty: 10-19 $28.88
    Qty: 20-49 $28.09
    Qty: 50+ $27.33

    To see and take advantage of our member pricing sign up for a business account or contact our sales team.

    Learn more about Monoprice Business

    4-channel Headphone Amplifier

    Expand your headphone monitoring capabilities with the addition of this 4-channel Headphone Amplifier from Monoprice!

    This amplifier features four 1/4" (6.35mm) amplified headphone outputs, each with its own independent volume control. It features an extremely clean amplifier circuit, which produces a signal-to-noise ratio greater than 98dB. It accepts line-level audio input over the stereo RCA jacks on the back or headphone level through the optional 1/4" TRS jack. A switch on the back allows you to choose a mono or stereo output. The amplifier is powered by the included 12 VDC/500mA AC adapter.


    • Inputs: 2x RCA and 1x 1/4" (6.35mm) TRS
    • Input Impedance: 100 K-ohms (unbalanced)
    • Outputs: 4x 1/4" (6.35mm) TRS
    • Output Impedance: minimum 10 ohms per channel
    • Maximum Output Level: +22dB
    • Maximum Gain: 20dB per channel
    • Signal to Noise Ratio: > 98dB

    17 Reviews

    79.41% of the reviewers recommend this product


    Sh*t the bed after about 3 weeks

    • rauri finan,
    •  san francisco, CA 
    • 4/20/2016 9:31:02 AM

    Pros: cheap

    Cons: cheap and no longer works.

    worked for about 3 weeks, now its dead. No power LED, no volume on outputs. Source is definitely sending audio to the unit.

    Was this review helpful to you?

    Bang for the buck

    • ambianceacoustics.com,
    •  San Diego, CA 
    • 1/9/2016 8:35:55 AM

    Pros: Price, performance, convenient size...you couldn't build this for what you pay for it.

    Cons: I based this review/rating on my limited time (since Christmas 2015) with this product, so any potential glitches haven't yet exposed themselves. I hope they won't.

    We bought this for a kid learning to play drums as a way of allowing him to play to music, but not have to blare music through loudspeakers. Quite simply, it works. An iPod or cellphone generally cannot reproduce sound loud enough through headphones/earbuds to be audible over live drums. This little amp solves that issue. I can't attest to crosstalk, but each channel has its own op-amp (4 x 5532) and uses metal film resistors on-board (yeah, I took a look under the hood). The kid is using a pair of Sennheiser 520's and the amp drives them no problem. This is not what I would consider an audiophile headphone amplifier, but for the purpose we bought it for, it performs admirably...especially for the price! Two thumbs up!

    Was this review helpful to you?

    Pretty OK headphone amp

    • Anonymous,
    •  Philadelphia, PA 
    • 10/31/2015 9:40:36 AM

    Pros: Great price, solid build, simple, small.

    Cons: Volume levels aren't exactly independent, some bleed, some noise.

    For $30 it does what it's supposed to. If you need to push 4 sets of headphones, this will do the trick. If you're looking for pristine, crystal clear audio, this is not the headphone amp for you. I use it in my home studio, and it's great for pushing headphone mixes to multiple musicians. However, I wouldn't recommend using it for critical listening.

    Was this review helpful to you?

    Monoprice delivers again!

    • Anonymous,
    •  Portland, ME 
    • 9/19/2015 6:18:20 AM

    Pros: Excellent value, plenty of power, reasonably durable

    Cons: None experienced

    Solid little 4 channel headphone amp. I've only tested with 1/4" TRS in, but haven't experienced the crosstalk that other reviewers have complained of, even at mixed hi/low/silent volumes. I've also used this with different loads (some 600O studio cans, some 25-50O) and though the 600O load is certainly noticeably quieter, it's still plenty of volume for recording monitoring purposes.

    Was this review helpful to you?

    Not terrible but definitely not that good

    • Mike Pardi,
    •  Lake Elsinore, CA 
    • 6/21/2015 11:17:11 AM

    Pros: Small, not expensive, easy to use

    Cons: Signal bleed from channel 1 to other channels, also the more you turn up channel 1, it adds bass and distortion to the other channels. Plus it's very dirty sounding, very noisy. Also feels cheap, like you could easily over-turn the knobs

    I guess technically speaking, it works. It just doesn't work very well and even at $30, it should be better quality than it is. Sure I could go buy a used Behringer headphone amp for less than $100, but if monoprice is going to offer this for $30, I figured I would give it a shot. One less rack space to take up.

    Was this review helpful to you?
    Tax and shipping will be calculated at checkout