Best 4 Channel Preamp

M-Audio M-Track Duo – USB Audio Interface for Recording, Streaming and Podcasting with Dual XLR, Line & DI Inputs, plus a Software Suite Included

Yamaha MG12XU 12-Input 4-Bus Mixer with Effects

Yamaha MG10XU 10-Channel Analog Mixer, with 4 Microphone Preamps, 3 Dedicated Stereo Line Channels, 1 Aux Send, EQ, 1-knob Compressors, and Digital Effects

High sound quality! D Debra Audio Pro Portable Recording Mixer Audio With USB 99 DSP Digital Effects For DJ Mixer Console Karaoke Recording Studio (SI-4UX (4 Channel))

Focusrite ISA428 MkII Four-Channel Mic Preamp Supporting Optional Eight-Channel A-D Converter

Mackie ProFXv3 Series, 6-Channel Professional Effects Mixer with USB, Onyx Mic Preamps and GigFX effects engine - Unpowered (ProFX6v3)

Moukey Stereo Mini Audio Mixer, Ultra Low-Noise 4-Channel Line Mixer for Sub-Mixing, DC 5V Audio Mixer with USB Cable, Ideal for Small Clubs or Bars, As Microphones, Guitars, Bass, Keyboards-MAMX1

dbx DI4 Active 4-Channel Direct Box with Line Mixer

Warm Audio WA-412 4 Channel Microphone Preamp and Instrument DI, Black

LiNKFOR 4 Channel Stereo Audio Mixer CX400 Metal Shell Support RCA Input and Output Mini Passive Stereo Mixer with Separate Volume Controls