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Kopul SLM-4 4-Channel Mic/Line Stereo Mixer

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Kopul SLM-4 4-Channel Mic/Line Stereo Mixer
Key Features
  • Mix Mic Signal with Three Line Signals
  • 3 Stereo RCA Line Inputs
  • 3.5mm TRS Stereo Line Input
  • XLR Mic Input, Switchable 48V Phantom
Ideal for content creators, musicians, DJs, and audio enthusiasts, the Kopul SLM-4 4-Channel Mic/Line Stereo Mixer offers a straightforward yet effective solution for integrating a microphone with multiple audio sources with ease. With its versatile input options, individual volume control, and headphone monitoring capability, it’s a valuable addition to any project studio, live performance setup, podcasting rig, multimedia workstation, or home theater where high-quality sound mixing is required.
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Kopul SLM-4 Overview

Ideal for content creators, musicians, DJs, and audio enthusiasts, the Kopul SLM-4 4-Channel Mic/Line Stereo Mixer offers a straightforward yet effective solution for integrating a microphone with multiple audio sources with ease. With its versatile input options, individual volume control, and headphone monitoring capability, it’s a valuable addition to any project studio, live performance setup, podcasting rig, multimedia workstation, or home theater where high-quality sound mixing is required.

Versatile Input Options
The SLM-4 features three stereo line-level RCA inputs, allowing you to connect a variety of audio sources, such as media players, drum machines, keyboards, turntables, computers, audio interfaces, or DJ mixers.

For vocal applications, it includes an XLR microphone input with switchable 48V phantom power, accommodating both dynamic and condenser microphones. This makes it a great choice for live streaming, presentations, or recording sessions where speech or vocals need to be mixed with background music or other audio sources.

Additionally, Channel 2 is equipped with an optional 3.5mm TRS input, providing a convenient way to integrate audio from smartphones, tablets, or portable digital recorders. This flexibility ensures that you can easily incorporate playback from mobile devices without needing additional adapters or converters.

Intuitive Controls
Each of the four channels features its own dedicated stepless volume control, giving you precise control over your mix. The mixer allows you to blend and adjust audio levels to achieve the perfect balance for your specific needs, whether you're DJing, broadcasting, or running a small PA system.
Flexible Monitoring
The mixed audio is output via a stereo RCA pair, making it easy to connect to powered speakers, amplifiers, or recording devices.

Additionally, a dedicated 3.5mm TRS stereo output lets you monitor the final mix through headphones, ensuring accurate audio adjustments before sending the signal to your main output.

Compact and Reliable Design
Designed with portability in mind, the SLM-4 features a sturdy, lightweight construction that makes it easy to transport and integrate into different setups.

Its compact size makes it perfect for desktop use, small recording studios, or mobile sound systems, while the durable build ensures reliability in both professional and personal applications.

UPC: 847628535701

Kopul SLM-4 Specs

Key Specs
Number of Analog Input Channels
4 (1 Mono / 3 Stereo)
Number of Mic Preamps
1
Analog Output Channels
1x Stereo Master Output
1x Stereo Headphone Output
EQ
No
Built-In Effects
No
Wireless
No
Rack Mountable
No
Mixer
Number of Analog Input Channels
4 (1 Mono / 3 Stereo)
Number of Mic Preamps
1
Analog Output Channels
1x Stereo Master Output
1x Stereo Headphone Output
Mix Routing
Main Mix
Faders & Level Adjustment
4x Channel Knob
Meters
No
Signal Processing
Gain/Trim Range
XLR Mic Input:
32 dB

1/8" / 3.5 mm Line Input:
26 dB

RCA Line Input:
26 dB
Dynamic Processing
No
EQ
No
Solo/Mute
No
Built-In Effects
No
Performance
I/O Impedance
Input:
10 Kilohm
SNR
> 90 dB
THD
0.008%
Connectivity
Analog Inputs
1x XLR 3-Pin Balanced Mic Input
6x RCA Line Input
1x 1/8" / 3.5 mm TRS Stereo Line Input
Analog Outputs
2x RCA Line Output
1x 1/8" / 3.5 mm TRS Stereo Line/Headphone Output
Phantom Power
+48 V, Selectable On/Off
Digital I/O
No
Wireless
No
Power
AC Input Power
100 to 240 VAC, 50 / 60 Hz
Power Supply Output
12 VDC (Included)
Physical
Rack Mountable
No
Dimensions
4.7 x 2.7 x 1.5" / 11.9 x 6.9 x 3.8 cm
Weight
0.9 lb / 0.4 kg
Packaging Info
Package Weight
1.315 lb
Box Dimensions (LxWxH)
9.7 x 6.5 x 3.2"

Kopul SLM-4 Reviews

Easy to use, well-made and gets the job done.

By Jim
Rated 5 out of 5
Date: 2025-06-02

I'm happy and impressed with this little Kopul SLM-4 stereo mixer. I’ve been using it mainly for live presentations where I need to blend multiple audio sources into a single output to a speaker system. Typically, I’ve got a laptop playing background music or video content along with a microphone for speaking. This mixer handles both with no problem and still gives me a couple of extra inputs if anything else needs to be plugged in last minute. The XLR input with phantom power is great for handling mics that need power, and the RCA inputs make it easy to connect just about anything else: media players, DJ mixers, keyboards, etc. I’ve also used the 3.5mm input for quick access to phone or tablet audio. What’s really useful is having independent volume controls for each channel. This lets me get the levels just right without having to mess with the source devices. This mixer is compact and tough, with a metal body and well-made knobs and ports, making it ideal for setups that move between rooms or venues. And the headphone output is really helpful for monitoring the sound. That feature is vital and definitely appreciated. For anyone doing presentations, events, or small venue setups where you’re juggling a few different audio sources, this little mixer is a clean and simple solution. It's one of those little tools that just makes life easier. [I have received this product in exchange for my honest review.]

See any errors on this page?

Is the power connection a DC5521 spec?

Is the power connection a DC5521 spec?
Asked by: John
Yes, the barrel on the power supply that is included with the Kopul SLM-4 4-Channel Mic/Line Stereo Mixer is DC5521 spec.
Answered by: David M
Date published: 2026-03-11

Can it mix input channels without anything ...

Can it mix input channels without anything plugged into the microphone ports?
Asked by: KENNETH
Yes, the Kopul SLM-4 4-Channel Mic/Line Stereo Mixer can mix the line input channels without utilizing the mic input.
Answered by: David M
Date published: 2025-12-05
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