If you are visually impaired and are having difficulty navigating this site, please call our Customer Support line via our toll free number 1 (877) 271-2592.
    Monoprice Unity Wall Mount 35-watt Stereo Power Amp with Digital Input and Subwoofer Out
    Product # 18512
    In Stock This item should ship tomorrow (11/13/2018) if ordered within 21 hours 52 minutes

    Volume Pricing (Log In to see Member Pricing)

    Volume Pricing

    Qty: 1 $179.99
    Qty: 2-9 $179.99
    Qty: 10-19 $179.99
    Qty: 20-49 $169.99
    Qty: 50+ $169.99

    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


    Model 18512
    Audio Inputs Stereo analog RCA, S/PDIF digital optical, and S/PDIF digital coaxial
    # of Output Channels 2.1 (stereo + subwoofer)
    Output Power 35 watts/channel into 8 ohms
    Minimum Output Impedance 4 ohms
    Frequency Response 20 Hz ~ 20 kHz ±3dB
    Signal-to-Noise Ratio > 90dB (1kHz)
    THD+N < 1%
    Input Impedance > 22 ohms
    Subwoofer Low-Pass Filter Frequency 120Hz
    Input Power 24 VDC, 3.75A
    AC Adapter Input Power 100 ~ 240 VAC, 50/60 Hz, 1.5A
    Dimensions 7.2" x 8..5" x 1.2" (184 x 216 x 30 mm)
    Weight 1.5 lbs. (0.7 kg)

    Support Files:

    Start typing your question and we'll check if it was already asked and answered. Learn More
    Browse 8 questions Browse 8 questions and 10 answers
    Does this amp turn on and off automatically?
    Daniel N on Apr 15, 2017
    BEST ANSWER: No, it has an on/off rocker switch, but no automatic power option.
    So you can't turn it on/off by remote control? Do people just leave it on all the time then?
    A shopper on Sep 2, 2018
    So this unit has auto switching?
    A shopper on Mar 11, 2018
    BEST ANSWER: More accurately, both inputs are active at the same time.
    Does it have a low power/standby mode?
    A shopper on Aug 31, 2018
    How does this change inputs?
    Bryan H on Feb 15, 2017
    BEST ANSWER: The optical input has priority. If unplugged then coax then analog. There is no switching between inputs. It a discreet higher powered high quality sound option for the thin sounding speakers shipping in new displays.
    How many watts into 4 Ohms?
    Geoffrey F on Jan 17, 2018
    BEST ANSWER: The user's manual that came with my amp does not give an output rating for 4 ohms.
    Which cable/harness do I need to plug into this amp from the speakers?
    Daniel B on Aug 22, 2017
    BEST ANSWER: Thank you for your interest in this amplifier. The Unity amp is shipped with a Euro Connector that will accept bare speaker wire up to 14AWG.
    Can the subwoofer crossover frequency be adjusted?
    Brian J on Apr 12, 2017
    BEST ANSWER: Cross over is set at 120Hz. It is not adjustable.
    4.2 / 5.0
    5 Reviews
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Star
    Super handy
    The amp is super, but the instructions are incorrect. I send one back because I couldn't get it to work properly. It has a very handy IR learner function for volume+, volume -, and mute, but if you try to program it as described, it won,t work. When I noticed the second unit behaving exactly like the first, I started to experiment. Here is the deal: To program IR commands press the IR learner button until the red indicator LED starts blinking. Hold the remote in front of the learner window and press Vol+, The indicator light will blink twice, NOW YOU MUST PRESS THE IR LEARNER BUTTON ONCE OR IT WON'T WORK! This critical step is omitted in the instructions. Once I realized this, everything was fine. The amp sounds great, and runs very cool. Wrong instructions takes away from what should have been five stars.
    August 5, 2017
    1 year ago
    Great little amp for TV installs.
    Used this for a conference room TV replacement in a room with external speakers and a powered subwoofer. The old amp was a household HDMI switching amplifier. There were constant issue with the sound. With this little amp, I can take the optical out from the TV and power the speakers and subwoofer. Best part is it has a IR learning function, and a remote IR sensor, so I can use the volume control from the TV remote to control the amp volume and don't need another remote. Amp itself is mounted inside a cabinet under the TV, but is designed to wall mount too.

    The first one of these I got had an issue where the volume wouldn't change, and was stuck on very, very low. I was irritated, but Monoprice RMA'd it, I had the new one in a week and it works great.
    May 1, 2017
    1 year ago
    Nice Amp, compact; but very hard to get remote control setup properly. Unit will not work without remote control.
    It is nicely made, compact and has all the connections I need to do the job (hook a couple of old Boston Acoustics Micro 80 bookshelf speakers to my desktop pc).

    Sounds fine, once i got it working. Which is the main drawback of the unit. It is highly dependent on the infrared remote control... there are no volume controls on the unit itself. The sound is very low until you get the remote working properly. While it is very easy to program it to respond to your remote of choice, such as a Logitech Harmony, (included one is not too great), it took me several hours to figure out that the infrared receiver on my unit was defective somehow and it would only work if I utilize the bundled IR extender cable. Once I plugged that in both the included remote and my Harmony worked fine.... without the extra cable, it's dead to the world. Annoying but tolerable. As long as I don't lose or break that cable... if I do, the unit will be completely useless.
    March 31, 2018
    8 months ago
    Good sound for the money
    I bought three of these and installation was easy and you can also program Apple TV 4th generation remote to control volume so you don't need to use additional remote. Sound quality is pretty good.
    July 18, 2017
    1 year ago
    Great Apple TV amp (old version with tosLink)
    Plenty of power - like to get an in wall sub and the system will be ideal for our gym. With an old Apple TV with tosLink output this can generate some real music combinations in a compact from factor.
    March 19, 2018
    7 months ago