Search query: 4 channel speaker selector

Product: Xtrempro 61048 2 to 4 Way Speaker Switch, 1 in 2 Out to 1 in 4 Out Way Pair Stereo Speaker Selector W/Terminal Clamps Metal Non-Slip Box - Black (1 x 2 Way)
Brand: XtremPro
Relevance: Exact
2 or 4 channel stereo speaker control, allow conventional amplifier or stereo receiver to drive multiple sets of speakers, without the need for external impedance matching devices
Ideal for low cost Distributed audio in residential or commercial sound applications
Individual control of each speaker pair. Impedance constant at 4-16 ohms, 150w(per Channel), 300W max, Cable length: Max 164ft/50m
Just hooked up to the stereo. No extra power supply needed
Metal non-slip box, 5in x 3in x 1. 5in (2 way) and 9in x 3in x 1. 5in (4 way)

Product: Nobsound Little Bear MC22 Mini 2-IN-2-OUT 3.5mm Stereo Audio Switcher Passive Speaker Headphone Manual Selector Splitter Box Audio Sharing (2-IN-2-OUT)
Brand: Douk Audio
Color: Black
Relevance: Substitute
Features:
2-IN-2-OUT (switch audio sources)
Input (3.5mm) connections: Computer / Phone / Music player. etc.
Output (3.5mm) connections: Active speaker / Headphone / Amplifier. etc.
High quality volume control knob; Smoothly control the volume
Mute button; Mute the device with just one key; Very useful for special conditions
A / B, 1 / 2 both select button; Can conveniently select the device you want to use as the audio input or output
No power and additional software required
Hot-swappable (no need to reboot devices)
Compact and super mini size; Easy to place and suitable for your desktop and office

Parameters:
Interfaces: 4 * 3.5mm jack
Knob and key: 1 * volume knob; 1 * A/B selector; 1 * mute botton,1 * 1/2 selector
Dimensions: 3.23 * 2.17 * 0.79 in
Weight: 0.22 lb

Packing List:
1 * audio selector (without audio cable)
2-IN-2-OUT audio selector / splitter / switcher box designed for customers having several audio sources and outputs
How to use: (1)connect two sound sources like computer / CD player with A & B ports; (2)connect two sound outputs like speakers with ① & ② ports
Main functions: (1)select audio input with A/B switcher; (2)select audio output with ①/② switcher
Volume control; One key to mute; Passive device; No power needed; Won't affect sound quality; Super mini size
Volume adjustment may not be gradual if connecting headphones to output port directly. Direct replacement or refund for defective devices. Prompt and courteous customer service.