By
Martin Lange
This review is from: LP-2020A+ Lepai Tripath Class-T Hi-Fi Audio Mini Amplifier with Power Supply (Electronics)
" This amplifier is shipped with a 12 Volt power supply. If you are somewhat knowledgeable then you can do the math and figure out that given the 12 Volt supply voltage this amp can deliver without an excessive amount of audio distortion:
- 2 x 18 Watts with 4 Ohm speakers, and
- 2 x 9 Watts with 8 Ohm speakers.
If you further look at the current rating of the power supply then you can figure out that in fact the maximum wattage is 2 x 10 Watts regardless of the speaker.
Some other reviewers have suggested swapping the power supply with another one that has higher current to boost the power rating. However, since the supply voltage is fixed it wouldn't help at all if you are driving 8 Ohm speakers. You are still limited to a maximum of 9 Watts. To get more wattage, you'll need to look at another amp. Below I have listed some of the more popular mini amps on Amazon. I have ordered the list according to their cost. You can see the power supply voltage of each amp and the maximum wattage when driving 8 Ohm speakers:
- Lepai LP-2020 ($17): 12 Volts - 2 * 9 Watts @ 8 Ohms
- Amphony 200 ($69): 36 Volts - 2 * 20 Watts or 1 * 80 Watts @ 8 Ohms
- Topping TP20-MK2 ($70): 14 Volts - 2 * 12 Watts @ 8 Ohms
- Dayton Audio DTA-100a ($96): 24 Volts - 2 * 30 Watts @ 8 Ohms
I hope my review will help in your amplifier selection."
This review is from another Lepai end-user.
All you need is a clean 9/10 watts with a passive pair of decent speaker and a high sensitivity around 88 DB or higher. In my 14X16 room, with the Mirage Omni 150 ( 88DB) , my normal listening position is between 9 and 10 o'clock on the pot volume of the Lepai,
When I feel the need to rock the house, I use my more powerful active pro-monitors.