Will this work if I only hook up one of the speakers? It mentions not to power it on if speakers aren't connected so not sure if this will damage it

Great question! Yes, it will work fine with only one speaker hooked up (I just tested the kit I have set up to make sure). I will edit the description, thank you for your feedback.

Can the input be from a "Condenser Microphone Cartridge" or does it need to be powered source?

We have never tried to connect a condenser microphone cartridge directly to the amp. Most condenser microphones require some small amount of external power. This amplifier works well when connected to a device with enough output power to play sound through headphones.

What is the speaker wire guage?

Don't buy these, works VERY poorly, get the small square round ones with the metal (silver) speaker cones, much better sounding and you can get better/smaller amp. 24g wire, with connector on end with pins too close together...

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Degraw DIY Speaker Kit - PAM8403 5V Amplifier + 2x 4 ohm, 3W Speakers - Mini Class D Digital Audio Amplifier Module for Arduino - Includes 3.5mm Plug

Degraw DIY Speaker Kit - PAM8403 5V Amplifier + 2x 4 ohm, 3W Speakers - Mini Class D Digital Audio Amplifier Module for Arduino - Includes 3.5mm Plug

Product ID: 63880930

Details

Manufacturer
Degraw
Maximum Supply Voltage
5 volts
Minimum Supply Voltage
5
Mounting Type
Board Mount
Voltage
5 volts

🔊6W total output power

🔌5V USB/AA battery powered

🎛️Smooth volume knob control

Description

🎧 Elevate your DIY sound game—small kit, big impact!

DIY FRIENDLY - Comes with breakaway header pins and mounting hardware; perfect for Arduino and Raspberry Pi projects.
PLUG PLAY READY - Includes 2x 4Ω, 3W mini speakers and 3.5mm audio cable for seamless device connection.
COMPACT POWERHOUSE - Class D PAM8403 amp delivers crisp 3W per channel in a tiny 28x20mm board.
CUSTOMIZABLE CONTROL - Integrated smooth-turn potentiometer knob for precise volume adjustment and power on/off.
FLEXIBLE POWER OPTIONS - Runs on any 5V supply—USB charger, battery pack, or AA cells (power supply not included).

This DIY Speaker Kit features a high-efficiency PAM8403 Class D amplifier delivering 3 watts per channel at 5V, paired with two 4Ω, 3W mini speakers commonly used in flat-screen monitors. It includes a smooth volume/on-off knob, a 3.5mm audio cable, and breakaway header pins for easy integration with Arduino or Raspberry Pi projects. Powered by any 5V source (USB charger, battery pack, or AA batteries), this compact kit is ideal for adding quality sound to your custom electronics with minimal fuss.

Specifications

ASIN	B07CRVRG83
Best Sellers Rank	#307,143 in Electronics ( See Top 100 in Electronics ) #1,712 in Audio Component Amplifiers
Brand Name	JIEEDRAP
Customer Reviews	4.2 4.2 out of 5 stars (155)
Manufacturer	Degraw
Material Type	Steel
Maximum Output Power	6 watts
Maximum Supply Voltage	5 volts
Minimum Supply Voltage	5 volts_of_direct_current
Model	8541737378
Mounting Type	Board Mount,Phone Mount,Plug Mount
Number of Channels	2
Output Power	6 watts
Package Type Name	box or package
Part Number	8541737378
Supply Current	1.2 A
UPC	745560722305
Voltage	5 volts

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