Can you plug in a sub-woofer?

Only if your sub feeds your monitors. If you don't know the answer to that question, you should probably start there. This device just provides 2 source inputs, and 2 stereo outputs.

I want to use this to control if sound comes through my headphones or studio monitors. Is the phones out affected by the mute or monitor toggles?

It has 2 headphone outputs, each with their own control, and a knob to choose between cue an input. It is not affected by monitor toggles or mute; those just turn the respective monitor speaker on and off. I run my mains on A and my subs on B for independent control. Each monitor also has its own trim level to manage balance. This thing behaves like any line mixer should.

What cables do i need? i do not know how to set up. i have 2 krk studio monitors and scarlet solo interface. please help

You need 2x RCA to 1/4" cables to connect your Scarlett to the Big Knob, and 2x 1/4" to 1/4" to connect the Big Knob to your monitors. Since the Scarlett is unbalanced out, there's no reason to use TRS (balanced) cables for your monitor run.

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Mackie Passive 2X2 Studio Monitor Controller, USB, Black | Big Knob Volume, Mono, Mute, Dim, 1/4 Trs I and O Plus 3.5mm Input, No Power

Product ID: 256033841

Details

Audio output mode
Stereo
Brand
Mackie
Connectivity technology
USB
Frequency response
20 KHz
Speaker maximum output power
1000 Watts

💻USB connectivity for seamless control

🔊2 stereo monitor outputs

🎛️4 analog TRS inputs + 1 line in

RM871

Duties & taxes included

In stock

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Description

🎧 Elevate your studio game with Mackie's Passive 2X2 – where pro control meets sleek simplicity.

PLUG AND PLAY USB - Seamless integration with your desktop or laptop—no drivers, no hassle.
ROBUST METAL BUILD - Durable desktop form factor designed to withstand the rigors of your creative workflow.
DUAL STEREO OUTPUTS - Drive two sets of studio monitors simultaneously for flawless A/B referencing.
VERSATILE ANALOG INPUTS - Connect up to 4 professional 1/4" TRS sources plus a 1/8" line-in for ultimate flexibility.
PRECISION VOLUME CONTROL - Effortlessly dial in your perfect mix with tactile touch control.

The Mackie Passive 2X2 Studio Monitor Controller is a compact, metal-encased desktop device designed for professional audio environments. It features 4 balanced 1/4" TRS analog inputs plus a 1/8" line input, 2 stereo monitor outputs, and USB connectivity for easy integration with computers. With tactile volume control and a passive design, it delivers pristine audio signal management without power requirements, making it ideal for studio and editing suites.

Specifications

ASIN	B01NCUZ32O
Additional Features	Volume Control
Age Range Description	Adult
Antenna Location	For Studio Use
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo
Brand	Mackie
Built-In Media	Pro Tools® \| First Software, Quick Start Guide
Color	Black
Compatible Devices	Desktop, Laptop
Connectivity Protocol	USB
Connectivity Technology	USB
Control Method	Touch
Controller Type	Volume control
Customer Package Type	Flat Free Package (FFP) or Equivalent
Customer Reviews	4.5 4.5 out of 5 stars (1,231)
EU Spare Part Availability Duration	7 Years
Enclosure Material	Metal
Frequency Response	20 KHz
Global Trade Identification Number	00663961050462
Input Voltage	120 Volts
Is Electric	Yes
Is Waterproof	False
Item Dimensions D x W x H	12D x 19W x 12H centimeters
Item Type Name	Studio Monitor
Item Weight	1 Kilograms
MP3 player	No
Manufacturer	Mackie
Model Name	BIG KNOB PASSIVE
Model Number	Big Knob Passive
Mounting Type	tabletop
Number Of Circuits	1
Number of Audio Channels	2.0
Number of Items	1
Number of Power Levels	1
Power Source	Passive
Speaker Maximum Output Power	1000 Watts
Speaker Size	1 Inches
Speaker Type	Monitor
Specific Uses For Product	Studio and editing suite applications
Subwoofer Connectivity Technology	Wired
Tweeter Diameter	1 Inches
UPC	663961058840 663961050462
Unit Count	1 Count
Warranty Description	manufacture warranty
Warranty Type	Limited
Water Resistance Level	Not Water Resistant
Wireless Technology	No Wireless Communication Technology
Woofer Diameter	1 Inches

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