FEMTO - Audioroot : Broadcast smart batteries and pro audio equipement
Amazon.com: TC-Helicon GO VOCAL Microphone Preamp for Mobile Devices : Musical Instruments
Sound Professionals SP-SPSB-1 - Microphone power supply with bass roll off SP-SPSB-1
Preamp Portable - Ehrlund Microphones
Amazon.com: Rodyweil Microphone Preamp Mic Gain Booster with 2 Input Max 75db Gain 48V Phantom Power XLR Output for Dynamic and Condenser Mic : Musical Instruments
ART Dual RP Dual Phantom Powered Mic Preamplifier | Sweetwater
Shure FP23 Battery Powered Microphone Preamp
Portable Mic Preamps
Amazon.com: Xvive P1 Phantom Power Supply 48V/12V Switch,Up to 40 Hours of Use,Rechargeable Portable Phantom Power for Condenser/Shotgun Microphones, Mic Preamp, Recording Studios : Musical Instruments
Phantom Power
FM-1 : Portable Mic Preamplifier
Denecke AD-20 Portable Microphone Preamp AD-20 B&H Photo Video