If you need a mixer for your online radio, we recommend the Behringer Xenyx 802. It's a small, analog mixer that doesn't require a lot of money.
The mixer has: Input Channels, Channel Strip Controls (for Channels 1 & 2), FX Section, Output Section, Monitoring & Metering.
Input Channels:
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4 Xenyx microphone/line inputs:
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Channels 1 & 2: Combo XLR (mic) and 1/4" Jack (line/instrument) inputs with dedicated +48V phantom power switch (for condenser mics).
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Channels 3/4 & 5/6: 2 Stereo channels, each with two 1/4" Jack inputs (or RCA inputs for 5/6).
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Total Input Sources: Effectively 8 (2 mono + 2 stereo pairs).
Channel Strip Controls (for Channels 1 & 2):
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Xenyx Mic Preamplifier: High-quality, low-noise preamp for clean gain.
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Gain Control: Adjusts the input level sensitivity.
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3-Band British EQ: A famous feature of the Xenyx series.
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Low (Bass)
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High (Treble)
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Mid (Mid Frequency): Features a sweepable mid-range control (you select the frequency and then boost/cut it).
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Aux Send (Pre-Fader): For sending a separate mix to monitors or external effects units.
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Pan Potentiometer (Pan): Panning control for the stereo image.
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Channel Fader: Level control for the channel.
FX Section:
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Built-in Digital Effects Processor: With 16 different effects (reverbs, delays, modulations).
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FX Send Control: Determines the level of effect sent from the master section to the processor.
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FX Amount per Channel: Each channel has a knob to control how much of the effect is applied to it.
Output Section:
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Main Mix Outputs: Balanced XLR and unbalanced 1/4" Jack outputs.
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CTRL ROOM Outputs: Separate control room outputs (1/4" Jack).
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Aux Return (FX Return): RCA inputs to return an external effect signal to the mix.
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Phones Output: 1/4" stereo headphone output with its own level control.
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2-Track RCA Inputs: For connecting a playback device (e.g., smartphone, audio interface output).
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2-Track RCA Outputs: For recording the main mix to a device.
Monitoring & Metering:
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Dual-Colored LED VU Meters: Monitor the output level for clipping.
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Phones / Ctrl Room Source Switch: Allows you to choose what to listen to on headphones or control room outputs (main mix or 2-Track input).
The Behringer Xenyx 802 is a great, inexpensive, and robust analog mixer that offers surprisingly good preamps and EQ for its price. It does not have a built-in USB audio interface to connect directly to a computer for recording. You need an external audio interface to record the main output.