Lepi LP-225 Digital Hi-Fi Audio Amplifier User Manual
- June 9, 2024
- Lepi
Table of Contents
LP-225
DIGITAL HI-FI
AUDIO AMPLIFIER
USER MANUAL
Thank you for choosing this Lepai® amplifier for your music application. Lepai amplifiers are known worldwide for their great sound, useful features, and affordable price, proving that clean, handy, hi-fi amplifiers, can cost less money.
Contents:
1x Lepai LP-225 mini amplifier
1x 12 VDC, 2A power supply
1x DC Power Cable
1 x Bluetooth Antenna
1 x Phoenix Speaker Plug
The Lepai LP-225 mini power amplifier provides 25 watts RMS of clean audio
power to any set of stereo speakers. A built-in loudspeaker protection circuit
triggers when the amplifier is turned on to protect speakers from high volume
bursts of audio.
This amp is perfect for using on any desk, countertop, workbench, and even in
DIY projects or mobile audio applications. Built-in mounting brackets allow it
to be mounted in, on, or underneath nearly any surface or container.
Use either Bluetooth or 3.5mm line input to connect to any phone, tablet, CD
player, TV, or streaming player. Bluetooth is the default input unless you
plug-in a 3.5mm plug into the line input jack. The amplifier will switch to
line-in and the Bluetooth light will flash. Remove the 3.5mm plug to switch
back to Bluetooth input.
Separate Bass and Treble controls enable tone customization for your listening
pleasure. Hear the original audio source signal by adjusting the tone controls
to the twelve o’clock position. If you use the line-out jack, the bass,
treble, and volume will affect the sound coming out of it.
Note: If Bluetooth pairing isn’t working make sure the line-input jack is
empty. Briefly press the pairing button on the amplifier. Turn the Bluetooth
off and then back on, on your Bluetooth device.
Electrical Specifications
Specifications typical @ +25℃, unless otherwise noted. Specifications subject to change without notice.
| Parameter | Conditions | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|
| Number of Channels | – | – | 2 | – | – |
| Minimum Load Impedance | – | 4 | 8 | – | Ω |
| Nominal Power Requirement | @2x25W, 24V,1kHz | – | 2x25W | – | W |
| Operating Voltage | @1kHz, 8Ohm | 12 | – | 20 | V |
| Idle Power | Signal detected@12V | – | 0.84 | – | W |
| Switching Frequency | SD Floating@24V | – | 300 | – | kHz |
Audio Performance
Specifications typical @ +25℃, unless otherwise noted. Specifications subject to change without notice.
| Parameter | Conditions | Min. | Typ. | Max. | Units |
|---|---|---|---|---|---|
| Amp Gain | Line In | L&R | – | 29.0 | – |
| SNR | Line In 2 x 25W@8Ohm, A-weighting | L&R | – | 98.8 | – |
| THD+N | Line In 1W@8Ohm, 1kHz | L&R | – | 0.017 | – |
Output Noise Level
| Line In@12V A-weighting, Input Connected to GND| L&R| –| 90| –| uV
BT@12V A-weighting, Input Connected to GND| L&R| –| 85| –| uV
Input Impedance| Line In@8Ohm, 1kHz,| –| 10| –| kΩ
DC Offset| –| –| 5| –| mV
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Last Revised: 11/11/2022