OFFCUP 4-Channel Audio Mixer, Compact Metal Line Mixer with Individual Volume Controls

Metal construction gives the OFFCUP 4-channel audio mixer a compact, practical format for bringing several line sources together. It combines four inputs into one output, with a separate volume control for each input and the output. Need to balance instruments or playback sources without setting up a larger mixing desk? This small mixer also offers a switch between stereo and mono.

How to use it

Connect up to four line-level sources, such as a guitar, bass, keyboard, microphone or playback device, then adjust each input independently to create a useful combined listening level. The output can connect to headphones or speakers, making the mixer suited to practice, home audio or a compact stage setup. Independent output adjustment gives you another level of control once the sources are balanced.

For a rehearsal, for example, a keyboard and other line sources can be brought into one listening output, with each level adjusted at the mixer rather than at the connected devices. The stereo/mono switch lets you select the supported output mode for the setup. Its compact size also makes it straightforward to keep with portable audio equipment.

Specifications

• Type: 4-channel line mixer
• Material: Metal
• Colour: Grey
• Weight: 0.33 kg
• Connectivity: TRS and XLR
• Input: Line
• Output connector: 1/4-inch TRS
• Power: DC supply, 5V/1A
• Connection for power: Type-C
• Controls: Independent input and output volume adjustment
• Mode: Stereo/mono switching

Pros

The main benefit is straightforward control over several sources in one compact unit. Individual input adjustments help when instruments or playback devices have different output levels, while a separate output control makes it easier to set the level going to the listening equipment. Switching between stereo and mono adds flexibility when matching the mixer to the intended setup.

The metal housing and four-corner non-slip pads are practical details for a mixer used on a desk or among stage equipment. Its light, compact design is easy to carry and store, so it suits musicians who want a simple way to combine line signals without organising a larger console around the task.

Buyer feedback is positive about the mixer’s functionality and quality. Views on noise are mixed: some describe low noise, while another reports noticeable hum. This feedback offers useful context when choosing a compact mixer for listening or practice.

Practical questions

How many sources can it mix? It combines four line signal sources into one output, with an individual volume adjustment for each input.

Which devices can be connected? The listed uses include microphones, guitars, basses, keyboards, phones, tablets and other playback devices. It has line audio input and TRS/XLR connectivity.

What power connection does it use? It is specified for a 5V/1A DC power supply and has a Type-C power connection.

When it makes sense

Choose this mixer when the aim is to combine a handful of instruments or playback sources and adjust their levels in one place. Its four channels, stereo/mono selection and compact metal format make it a practical fit for home practice, portable listening and streamlined stage setups. If your priority is simple source mixing rather than a larger console with a broader control layout, the OFFCUP brings the essential level adjustments together in a space-saving unit.