The amplifier does not meet the specifications in the ad. The power in the ad is 18 + 18W. In fact, 10 Watts at 15 volts (see photo). It is necessary to replace the transformer with 25 volts.
The parcel was initially lost, seller resent without hesitation. Trustworthy seller. The first impression of this amplifier was it had a warm sound, strong base and good voice/ mid-range. However, the base was a little loose and the whole sound seemed to played from a curtain, lack of focus and clarity. After 2 weeks of run-in, the base becomes tighter and still strong. The curtain has been lifted with excellent voice projection. Though I would like the hi range a little crispier, but at this price, it is hard to match by other amplifiers 3 times it's price. Highly recommended.