4 Way RCA Switch 4 In 3 Out AV Switch RCA Switcher Box Video L/R Stereo Audio AV Selector Box 4X3 Composite Switcher For DVD. Eliminates the need for separate cables. 1 AV RCA Switcher. 4X3 RCA Splitter: The video switch enables you to connect up to 4 RCA devices to three TV set which has a RCA port.
eBay
1Pair Universal Car Coaxial Speakers 4*6 Inch High Power Car Audio Stereo Speakers Full Range Audio Non-Destructive Installation
Aliexpress UK
This compact switcher box allows connection of up to 4 stereo sources input and selects 1 audio output through the rotary knob (Note: when 1-in 4-out: 4 outputs are not simultaneously). rotary the knob on front panel to switch audio output easily.
eBay
6 Inch 600WCar Speakers 2-Way Full Range Frequency Automotive Audio Music Stereo Speaker Auto Door Subwoofer Car Audio Speaker
Aliexpress UK
VU102 amplifier / speaker selector: two working modes (2-IN-1-OUT / 1-IN-2-OUT), with A/B channel switch button, convenient to compare the sound quality of 2 pair of different speakers or 2PCS power amplifiers without plugging in and out cables repeatedly to avoid wearing the contact point of the sockets. Euipped with VU meter and remote control: a 72*32mm large vu meter, can dynamically decorate audio environment and provide incomparably visual effects when enjoy HIFI music. Remote control makes everything convenient, all settings can be quickly adjusted from distance.
eBay
Herdio 4‘’ 160W 2Way Ceiling Bluetooth Speakers Audio Control Amplifier Receiver For Home Audio Loundspeaker Stereo Music Player
Aliexpress UK
2-way amplifier/speaker selector: both working mode (2-IN-1-OUT / 1-IN-2-OUT), with A/B channel toggle switch, convenient to compare the sound quality of 2 pair of different speakers or 2PCS power amplifiers without plugging in and out cables repeatedly to avoid wearing the contact point of the sockets. Strong compatibility for audio device: support doing comparison between different types of amplifiers such as BTL, class A, class B, class D, tube amp etc.. Each channel can pass up to 200W power, also suitable for the comparison between most passive speakers. Purely mechanical passive circuit: no power supply is required, no loss of input and output signals during transmission, and no audio rendering or electromagnetic interference, providing HiFi lossless audio without distortion.
eBay
4/5/6.5 Inch Car Speakers &Speaker protector Coaxial Subwoofer Automotive Audio HiFi Music Full Range Frequency Full Car Audio
Aliexpress UK
Enables extra devices such as CD, Tuner etc into an amplifier with only one AUX input Connections via RCA phono sockets. All Connections via RCA phono sockets. This Sturdy 3 way stereo audio source selector from E-Audio connects up to 3 audio components to your amplifier.
eBay
KUERL New 6.5 Inch Car Audio Coaxial Speaker High Power Active Car Audio Modified Speaker 60w Door Horn
Aliexpress UK
Analogue Audio Switch | 4 port(s) | Connection input: 1x 3.5 mm Audio Input / 3x (2x RCA Female) | Connection output: 1x (2x RCA Female) | Manual | Metal | Anthracite This Nedis analogue stereo audio switch can be used to connect three devices with RCA stereo audio connections and one additional device via a 3.5mm Jack connector to an amplifier/receiver with RCA stereo audio connection. This switch box is bi-directional and therefore also works when you want to connect one device to four amplifiers/receivers. The source can be selected via the rotary switch on the top.
eBay
High Efficiency Mini Dome Tweeter Speaker With Base 12V Loudspeaker Audio Auto Sound Speaker For Car Audio System 900W (2*450W)
Aliexpress UK
4-way(1-in-4 output) audio splitter, 4 channel can output at the same time, convenient for users to do contrasts among headphone, power amplifier and active speakers etc, each channel with independent volume control, easy to adjust proper volume for different audio devices.
eBay
Gravity Planet G1 Pro Bluetooth Speaker Subwoofer High Sound Quality HIFI Audio-grade Wireless Audio Cool
Aliexpress UK
The switch allows you to select speakers individually or all at once, provided the amplifier can handle the total number of speakers connected. AV Link 8 Way Speaker Selector Switch HiFi Audio Splitter Box 8x100W AD-SPK18.
eBay
Car Audio Modified Speakers 165mm Two-Way 6.5 Inch DC-12v Car Package Speaker Front Door Combo Audio RMS 70w Sound System
Aliexpress UK