Yamaha, Onkyo and Denon are reputable brands of mini stereo systems, according to About.com. Popular products offered by these manufacturers include the Yamaha MCR-N560, Onkyo CS-265 and Denon D-M40.
The Yamaha MCR-N560 features two speakers, a CD player and a radio. It also has USB and Ethernet ports for connecting computers, flash drives, personal audio players and other sound sources. Optional accessories include wireless and Bluetooth adaptors.
The Onkyo CS-265 is a Bluetooth-enabled mini stereo available in black, white and red. This system includes two speakers, an amplifier, a CD player and a radio. Other features include bass boosting and a wireless remote.