Amazon.com: AudioControl LC-1.800 800w RMS Mono Amplifier Bass Processor Audio Control Bundle with Rockville HTS56 1000w 5.1 Channel Home Theater System/Bluetooth/USB+8" Subwoofer : Electronics
Amazon.com: D Debra Audio E270 Professional Digital Pre-stage Effect Anti-howling Audio Processor with 48 bit DSP Effect Echo USB MP3 Bluetooth Optical For House Karaoke, Stage, Performance (E270) : Musical Instruments
Marantz Cinema 70s 7.2-channel slimline home theater receiver with Dolby Atmos®, Bluetooth®, Apple® AirPlay® 2, and Amazon Alexa compatibility at Crutchfield
NAD Electronics M17 V2i Masters Surround Sound Preamp Processor — Safe and Sound HQ
Amazon.com: FX AUDIO Tube Preamp with DAC HiFi Home Audio Stereo 6N3 Vacuum Tube Preamplifier for Home Theater System Active Subwoofer/ Speakers with Bass Treble Control USB/Opt/AUX Input : Electronics
Marantz AV8805 AV Preamp Reviewed - HomeTheaterReview
NAD® Masters Surround Sound Preamp Processor-M17 V2i | Stereo East Home Theater | Frisco, TX
Amazon.com: Berlingtone BR-124MX, Professional 12 - Channel Bluetooth Studio Audio Mixer - DJ Sound Controller, USB Drive, RCA, 10 XLR Microphone Jack, 7 Band EQ, 16BIT Digital Multi Effect Processor : Musical Instruments
Amazon.com: DBX 286s Microphone Preamp And Channel Strip Processor with 1/4-Inch TRS and XLR Cable Bundle (3 Items) : Musical Instruments
Amazon.com: dbx 286s Microphone Preamp/Channel Strip with Lewitt LCT-240-PRO-WHT Condenser Microphone, XLR Cable, 1/4" to 1/4" TRS Cable and StreamEye Polishing Cloth : Musical Instruments
Amazon.com: 1000W Bluetooth Home Theater Receiver - 5.2 Channel Surround Sound Stereo Amplifier System with 4K Ultra HD, 3D Video & Blu-Ray Video Pass-Through Supports, HDMI/MP3/USB/AM/FM Radio - Pyle, Black : Electronics
Amazon.com: ART Tube MP Professional Mic Preamp/Processor : Electronics
Amazon.com: Douk Audio T4 PRO Vacuum Tube Phono Preamp, MM Turntable Preamplifier, GE5654 Hi-Fi Headphone Amp for Home Theater/Record Player/Stereo Amplifier/Active Speaker : Electronics
UpBright New AC in Power Cord Cable Plug Lead Compatible with Marantz Home Theater Preamp/Processor Processing and Dolby Atmos AV7701 AV7702 AV7703 AV7005 AV8801 AV8802 AV8802A AV8803 AV9000
Marantz® 15.4 Channel Black Preamplifier Processor | Paradyme
Amazon.com: Fosi Audio Box X2 Phono Preamp for MM Turntable Phonograph Preamplifier with Gain Gear Mini Stereo Audio Hi-Fi Pre-Amplifier for Record Player with DC 12V Power Supply : Electronics
Amazon.com: Douk Audio T4 PRO Vacuum Tube Phono Preamp, MM Turntable Preamplifier, GE5654 Hi-Fi Headphone Amp for Home Theater/Record Player/Stereo Amplifier/Active Speaker : Electronics
JINGERL UPC1892 HIFI Stereo Preamp Amplifier Volume Tone Control JRC2150 BBE Preamplifier Treble Balance Bass Finished Board