USB 2.0 Audio Adapter Box with Line Input and Mic Input
RDL DS-J3 Mic/Line Input Assembly with XLR/RCA Jacks DS-J3 B&H
Studio Technologies Model 5414 Mic/Line Input & Line Output Interface - Vintage King
Mic/Line Input Gain
RDL RU-MX5ML 5 Input Mic/Line Mixer with 24V Phantom Power Mic/Line Out | eBay
Understanding Audio Level
RDL 4x1 Mic and Stereo Line Audio Mixer
Amazon.com: Audio Interface, LiNKFOR 24 Bit/192 KHz USB Audio Interface 2i2 for Recording, Podcasting, Streaming with MIC LINE Input, XLR Interface for PC Guitar Bass (Free Driver) : Musical Instruments