Douk Audio L3 RCA Audio Switch 1 in 3 Out & 3 in 1 Out, 3 Channel Switcher Selector Box with Remote Control & VU Meter & Bypass for PC, Amplifier, Speaker

Nobsound G2 Subwoofer Power Amplifier Mini Mono SUB Amp 100W PBTL BTL Bridge Home Theater

Douk Audio A5 2 Channel TPA3255 Stereo Amp, 300 Watts x2 Mini Hi-Fi Audio Power Amplifier Class D for Home Theater System, Passive Bookshelf Tower Speakers with High-Pass Filter + 48V Power Supply

Douk Audio Tube Phono Preamp: HiFi MM/MC Turntable Preamplifier | Headphone Amp with AUX Input | VU Meter for Record Players, Vinyl Systems Audiophiles (T4 Plus)

Douk Audio BS-1 Bass Shaker: 50W High Power Tactile Transducer - Subwoofer Lows for Home Theater, Car Audio & Gaming Chair Vibration Immersion​ (1 PC)

Douk Audio P7 Phono Preamp: Vacuum Tube Turntable Preamplifier with Balanced XLR Output, High-Pass Filter, Bass & Treble Control, Bypass for MM Record Player, Amplifier, Speaker

Douk Audio 7 Band Equalizer Balanced EQ Audio Preamp with XLR RCA Input and Output for Home Stereo, Amplifier, Computer Speaker (T7)

Nobsound Mini Bluetooth 5.0 Power Amplifier, Stereo Hi-Fi Digital Amp 2.0 Channel 50W×2 with AUX/USB/Bluetooth Input, Wireless Audio Receiver, PC Sound Card with Power Supply (Black)

Nobsound 300Wx2 Stereo Amplifier with Phono Input - HiFi Class D Mini Power Amp for Home Theater, Turntables, Studio Monitor | TPA3255 Chip, RCA/MM Inputs, Bass/Treble Control (NS-13G MAX DC 48V)

Matched Pair 7-Pin GE JAN 5654W Vacuum Tubes Upgrade for 6AK5 6J1 6Ж1 EF95 6J1P

Douk Audio BS-1 Bass Shaker: 50W High Power Tactile Transducer - Subwoofer Lows for Home Theater, Car Audio & Gaming Chair Vibration Immersion​ (1 Pair)

Douk Audio VU22 Dual Analog VU Meter Display DB Panel MIC+LINE Sound Level Meter (Black)

4 Channel Bluetooth Amplifier, 50W x 4 Audio Power Amp, Hi-Fi Home Stereo Speaker Receiver [Douk Audio M4]

Nobsound P10 HiFi Headphone Amplifier: 1100mW Output (24–600Ω) – 30V Boost – RCA/3.5mm Inputs & 6.35/3.5mm Outputs – Swappable Op-Amps – for Audiophiles & HiFi Music Lovers

Douk Audio T14-EQ Phono Preamp: Mini MM/MC Turntable Preamp with RIAA EQ, Headphone Out, Tone Control, USB 5V Power – for Hi-Fi Vinyl Record Player Amplifier

Douk Audio U3 PRO HiFi Mini Class A Headphone Amplifier – High-Power Desktop Amp for 18-600Ω Headphones, 1500mW Output, 3.5mm & 6.35mm Jacks, DC 5V

Douk Audio VU3 PRO Dual Analog VU Meter, 2-Way Amplifier Switch, Speaker Selector, Amp Audio Switcher Box 2-IN-2-OUT with DB Panel Display

DoukAudio MC5-BX Mini Audio Mixer: 4-Channel Ultra Low-Noise Stereo Line Mixer for Home Studio Bar, Active & Passive Modes, Portable Metal Design for Musicians DJs

Douk Audio T9 Vacuum Tube Phono Preamp Stereo Turntable Preamplifier with Headphone Output and Treble Bass Control for MM/MC Record Player, Home Hi-Fi Audio, Amplifier, Speaker

Douk Audio U3 Headphone Amps, Mini Hi-Fi Amplifier for Home Desktop PC 6.35mm / 3.5mm Headsets, Class A, RCA Input, DC 5V

Douk Audio A5 2 Channel TPA3255 Stereo Amp, 300 Watts x2 Mini Hi-Fi Audio Power Amplifier Class D for Home Theater System, Passive Bookshelf Tower Speakers with High-Pass Filter + 32V Power Supply

MM Phono Preamplifier, Hi-Fi Turntable Preamp for Home Audio/Record Player/Stereo Amplifier/Active Speaker [Nobsound T3]

Nobsound AK2515 Pro Audio Spectrum Analyzer with VFD Display, MIC Input & Advanced AGC - Precise Sound Level Meter for Musicians and Audio Enthusiasts

Douk Audio HiFi Vacuum Tube 7-Band EQ Preamp Equalizer XLR Pre-Amplifier Home (T8 PRO Silver)