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    Monolith by Monoprice Desktop Headphone Amplifier and DAC with THX AAA Technology (Dual AKM 4493 DACs & Dual AAA-788 Modules)
    Product # 24459
    Out of Stock ETA: 11/2/2018


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    Model 24459
    Analog Inputs 1x unbalanced RCA, 1x unbalanced XLR
    Digital Inputs 1x Optical, 1x Coaxial, 1x AES/EBU, 1x USB
    Playable Frequency Response 1Hz ~ 40kHz ±0.5dB (96kHz input)
    Signal-to-Noise Ratio (A-Weighted) > 120dB
    Dynamic Range > 120dB
    Total Harmonic Distortion < 0.0005%
    Crosstalk < 100dB
    Maximum XLR Input Voltage 5.2 Vrms
    XLR Input Impedance 20 kilohms
    Maximum RCA Input Voltage 2.6 Vrms
    RCA Input Impedance 10 kilohms
    Optical Sampling Frequency 96kHz
    Maximum Optical Resolution 24 bits
    Coaxial Sampling Frequency 192kHz
    Maximum Coaxial Resolution 24 bits
    AES/EBU Sampling Frequency 192kHz
    Maximum AES/EBU Resolution 24 bits
    Supported Sampling Rates 32 ~ 192 kHz
    Direct Stream Digital™ Support DSD64, DSD128
    Input Power 16 VDC, 1.25A
    AC Adapter Input Power 100 ~ 240 VAC, 0.5A, 50/60 Hz
    Dimensions 8.7" x 7.8" x 2.0"

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    Browse 35 questions Browse 35 questions and 34 answers
    The picture has the two balanced analog lines labeled as 'analog in', shouldn't that be analog out?
    Justin B on Dec 20, 2017
    BEST ANSWER: The unit has balanced inputs, and unbalanced inputs and outputs. You can use the balanced headphone output on the front as a balanced output.
    Does the volume knob control the analog outputs? ie. Can this function as a preamp for external speakers?
    A shopper on Nov 17, 2017
    BEST ANSWER: Yes, the volume knob also controls the analog outputs.
    Does this product not have a pre out or line-level out? Would be nice to use the dac for speakers.
    New User U on Sep 3, 2017
    BEST ANSWER: To clarify, will this be a true line out, or will it be variable so that we can use this as a pre-amp for powered monitors?
    is this amp compatible with 220v 50Hz?
    A shopper on Sep 4, 2017
    BEST ANSWER: yes!
    what's the output impedance of this amp?
    A shopper on Sep 24, 2017
    BEST ANSWER: Staff - it seems that you answered the supported headphone impedance, but what most of us want to know is the actual output impedance of the headphone out on this unit. Will it be below 1ohm so we can use it with more sensitive IEMS and the like?
    What's the output impedance(not the advertised range of headphone impedance that the amp "supports") of the headphone amp ?
    A shopper on Jan 9, 2018
    Monolith by Monoprice Desktop Headphone Amplifier and DAC with THX AAA Technology (Dual AKM 4493 DACs & Dual AAA-788 Modules)
    Monolith by Monoprice Desktop Headphone Amplifier and DAC with THX AAA Technology (Dual AKM 4493 DACs & Dual AAA-788 Modules)
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    BEST ANSWER: Desktop HPA is 32Ω. Monolith tube HPA is selectable; 32Ω, 64Ω, 150Ω, 300Ω, & 600Ω
    How big is this amp?
    A shopper on Sep 4, 2017
    BEST ANSWER: Full dims will be made available when the product is released.
    Will this come with, or have available, a remote control or IR sensor so that a universal remote control could be used?
    A shopper on Nov 12, 2017
    BEST ANSWER: This headphone amp does not have any IR capability.
    will this need to install a driver to use the usb input?
    A shopper on Oct 29, 2017
    BEST ANSWER: For Macs you should not need one but Windows will likely require one to take full advantage of the high resolution formats. It is my understanding that The newest Creators Edition of Windows 10 includes an updated USB 2 driver that supports resolutions higher than 96Khz but I'm not sure of the extent of that support.,
    does the Dirac Sensaround mode work when using the analog imputs or only works with the digital ones?
    A shopper on Sep 3, 2017
    BEST ANSWER: The Dirac Sensaround will work on both types of inputs.
    is the headphone jack 1/8 or 1/4inch?
    A shopper on Sep 29, 2017
    BEST ANSWER: 1/4inch.
    Can Dirac Sensaround II interpret multichannel sources? (and can the DAC receive them?)
    New User U on Oct 31, 2017
    BEST ANSWER: No, when listening to headphones you will need to set your system to 2 channel output.
    Will we able to change the DAC's digital filter?
    A shopper on Sep 28, 2017
    BEST ANSWER: There are no user serviceable parts inside.
    Will the volume control be a pot, stepped relays, fully digital, or some other type?
    A shopper on Mar 2, 2018
    BEST ANSWER: Fully digital via AK4493 DAC
    What are the dimensions?
    A shopper on Oct 23, 2017
    BEST ANSWER: Final dimensions are not complete, but it will be relatively compact.
    Do we have a release date/month/timeline?
    Stacy D on May 29, 2018
    You have been advertising this unit for 6-8 months now, when will it be available?
    New User U on May 21, 2018
    You describe the DAC as capable of DSD 11.2MHz, but AMK lists the AK4493EQ as supporting DSD 22.4MHz. Is there a limitation in the way the design has been implemented?
    A shopper on Feb 13, 2018
    BEST ANSWER: Specs listed are currently not final and will be updated.
    Can we pass SACD DSD to this unit? I was under the impression that this can only be passed via HDMI.
    Timothy H on Nov 22, 2017
    BEST ANSWER: Yes and no. You cannot hook up a SACD player to the unit since it does not have an HDMI input. However, anymore the DSD files, formerly only found on SACD's, are available as Hi-rez downloads from quite a few sites and some people have even gone to the considerable trouble of ripping their SACD's, so they have the files on a computer. Once you have the DSD files on a computer, you can play them on this unit via the USB type B input, assuming your player software supports the playing of DSD files (JRiver, for example). Also, if this unit supports DSD over DoP, you could probably use the coaxial digital input, but it is not stated if this unit allows that. This usually only works for 2.8 Mhz DSD files, not the 2X or 4X resolution files as coaxial doesn't have the bandwidth for that.
    What is the deal? This thing has been pushed back by nearly a year!
    Jason B on Jun 9, 2018
    Did you guys put two 788 modules in it to make it balanced, or just to give it more juice?
    Lyova M on May 23, 2018
    BEST ANSWER: To make it balanced output AND to double the voltage swing at the output. e.g. this quadruples the output power into 300 Ohms headphone.
    With the balanced and SE jack headphone output, What is the power output into 32, 50, 100, 300 ect ohms?
    A shopper on Oct 15, 2017
    BEST ANSWER: 300 Ohms 648 milliWatts
    32 Ohms 3180 milliWatts
    16 Ohms 1591 milliwatts
    does it have different gain levels?
    A shopper on Sep 25, 2017
    BEST ANSWER: Yes, you will be able to set different gain levels.
    Will this have a full hardware decoder for MQA?
    A shopper on Dec 12, 2017
    BEST ANSWER: It will not. It will, however, have an AKM 4493 DAC. Brand new DAC from AKM.
    What is the power output for the balanced output for 50 ohms?
    A shopper on Dec 29, 2017
    USB input appears to be type-B. Will a USB type-A female to type-B male adapter work for an iPod audio source input?
    A shopper on Dec 12, 2017
    BEST ANSWER: You will need an adapter and it should work.
    Will this have a remote control?
    A shopper on Dec 9, 2017
    BEST ANSWER: It will not have a remote control.
    OK, so the 788 isn't a true balanced amplifier... but you're putting two in. AND you're putting in two AKM 4493 DACs.

    Are you putting two of these in to make it a balanced output? What is the reasoning behind using two of each of these units if the unit won't be balanced? Furthermore, why put a 4-pin XLR connector on the unit if it won't be balanced? You have a lot of clarifying to do Monoprice and I suggest you get someone who actually knows what they're talking about to answer all these questions, because they are not being answered with any clarity.
    Tom T on Aug 21, 2018
    BEST ANSWER: Incorrect. This Monoprice unit is truly balanced in & out. It contains dual THXAAA-788 stereo amplifier modules configured to create a fully balanced bridged stereo output. It also supports TRS unbalanced output.
    The XLR-4 is present to permit balanced headphone connection.
    Does this device decode Dolby Digital?
    A shopper on May 21, 2018
    BEST ANSWER: No it does not.
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