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AS3050KT - 25W Hi-Fi Audio Amplifier (LM1875)

Ability Level 3: IntermediateProduct Formats Available: Pre-Assembled Module (AS) or
Self-Assembly Electronic Kit ( Soldering Required)

Circuit uses a high fidelity LM1875 amplifier IC and delivers up to 25W RMS into 8 Ohms @ 1% THD. S/N ratio >100dB. This little board produces quite outstanding results given it's simplicity and price.

For full technical details please click on the User Manual and LM1875 links below.

The IC has short circuit and thermal overload protection. 2 x On-board 2A protection fuses. Solder pad connections. Heatsink, power supply and cables not provided.

Input Voltage
25V dual supply (see kit 3114)
Power Supplye.g. CFS005 or kit 3114 with a suitable mains transformer
Current Consumption70mA standby, 4 Amps max.
Output TypeUp to 30W into 8 Ohms
25W RMS, 8 ohm load, 25V supply
Output impedance4 - 8 Ohms
S/N ratio> 100 dB
THD< 0.15% @ 1kHz, 20W
Freq. response~ 15 Hz to 50 kHz, -3 dB
Open Loop Gain90 dB typical
Board Dimensions51x53mm
Board ConnectionsSolder pads
Product FormatsSELF-ASSEMBLY Electronic Kit (KT) or
PRE-ASSEMBLED Electronic Module (AS) Product Formats Info
DocumentationUser Manual
LM1875 Data Sheet
Amplifier Power Supply General Advice
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