API MC531 Monitor Controller

Get a Professional Monitoring Solution With the API MC531

Featuring the same level of craftsmanship found throughout API's entire product line, the MC531 offers a stand-alone version of the monitoring functionality built into the center section of API's legendary analog consoles. Specifically designed to include fully-featured monitor control for DAW workflows, the MC531 can integrate seamlessly into any audio production environment where functionality, ease of use and an accurate reference of each audio source is required.

Drawing inspiration from the monitor control modules of all API consoles, the MC531 features a Main and two Alternate stereo outputs, the latter having individual trims for speaker level matching. Programmable subwoofer integration allows the user to link the Sub with the Main and/or either of the Alternate outputs. With a total of seven selectable stereo input sources (three analog line level inputs, AES, USB, plus 3.5mm and Bluetooth), the MC531 can meet the monitoring needs of almost any studio setup. Two independent Headphone outputs and a built-in Talkback mic complement the feature set. Of course, the classic API 41-detent Control Room Knob is right at your fingertips.

• 3 stereo balanced line level analog audio inputs
• Digital audio input, selectable between AES3 or USB
• 3.5 mm input on front and rear panel
• Bluetooth connectivity
• All 5 inputs are buffered with the API 2510 Op Amp
• 3 stereo balanced line level outputs with individually adjustable trim levels
• Mono balanced line level output for feeding a subwoofer with adjustable trim level
• Independently assignable SUB output
• Stereo outputs include full mute, mono, and DIM controls
• 2 stereo headphone outputs
• Headphone source selection toggle switch for C/R or CUE SOURCE
• CUE SOURCE selectable from any of the 5 inputs
• Built-in Talkback Mic with gain control and activation button
• 18 segment stereo LED meter
• Balanced unity level meter output for connecting to an external meter system
• External power supply

SPECIFICATIONS

• Input Connections
• ST-1, ST-2, ST-3: 0.25" Balanced Analog, 30 kOhm Input Impedance
• ST-4: Digital Input, USB Type-B, XLR female AES3
• ST-5: Bluetooth, Mini Jack front and rear in parallel
• Output Connections
• Control Room Outputs: XLR, selectable electronic or transformer balanced, 75 Ohms
• Meter Output: 0.25" Balanced
• Headphone: 0.25" Stereo
• Maximum Input Level: +28 dBu
• Maximum Output Level: +28 dBu
• Frequency Response: 20 Hz to 50 kHz, +/- 0.5 dB
• Signal to Noise Ratio: 115 dB
• Power Consumption: 16 W
• Unit Size: 11 x 12.75 x 4 inches
• Shipping Size: 14.5 x 13.5 x 8.5 inches
• Unit Weight: 8.5 lb
• Shipping Weight: 12 lb

We are Chuck Levin's Washington Music Center

Since 1958, Chuck Levin’s Washington Music Center has been the trusted destination for musicians and audio professionals across Maryland, Virginia, and Washington, D.C. Family-owned and operated, our legendary music store delivers Everything in Music®—from instruments and recording gear to pro audio, rentals, and repair services.

Our team of musicians and industry experts lives and breathes gear, helping you build the perfect setup for your next performance, studio session, or installation. As an authorized dealer for top brands, we also offer our award-winning CHUCKSCLUSIVE line—exclusive, limited-edition instruments and collaborations recognized with the NAMM Top 100 Dealer Innovation Award for redefining what a music retail experience can be.

Chuck Levin’s isn’t just a store—it’s a community built by players, engineers, and creators who share a lifelong passion for sound. Stop by our legendary Wheaton, MD showroom or contact us anytime for expert advice, product questions, or the best possible deal on your next piece of gear.