This little amp can be used as an extra for a small secondary audio system. For best performance we must set the voltage to 24 volts maximum (attention to the recommendations of the seller, which specifies not to exceed 25 volts) and preferably choose a pair of speakers with a sensitivity of 88 dB minimum for good momentum and good volume. I tested this amp on a pair of Klipsch having 91 db sensitivity and sound and stunning result !! Content of the price and size ..... it easily goes out 2 x 10 Watts RMS with good sound quality quickly after we get beyond the audible distortion. Musically it is really doing well compared to a small amp SMSL SA-50 (for me it is a reference to the SA-50 QPR unbeatable and musicality) ..... frankly really nice because that little TPA3123 it has everything a great !! In conclusion this is a good compromise for qualitative and plays at low volume, so do not expect sound to a hall but for a room volume of 20 to 25 m² he does his job the small ^ ^
