Sony SRS-D4

     For you, music fan, this speaker can be one option. Sony SRS-D4 is a speaker 2.1 which has output with power 13 watt RMS. A subwoofer with 95 mm driver has provided to support bass output which is enough for you to listen any kind of music. Two satellites sized 46 mm guaranteed the sound produced would be clearer and better. Sony SRS-D4 has power, volume, and bass buttons in front side (bottom) and also placed all power port and satellite in rear side. Material used in subwoofer is not so good since when playing music with high bass, we can see its vibration, and it caused the bass became inoptimum caused by unperfect resonance.
                                             
    Satellite in this speaker is designed 15 degrees faced upside, made the sound produced can be listened better since the sound produced aimed up. This Speaker also uses digital amplifier to converse analog signal produced. It made Sony SRS-D4 save more power and has lower temperature.

Spesc:
Pros : unique design, clear sound for treble music
Cons : Bass is less sharp and sounds cracked.
Name : Sony SRS-D4
Frequency Response : 40 Hz - 18 KHz
Bass Driver : 95 mm
Satellite Driver  : 2 x 46 full range driver
Speaker System : Full Range
Speaker System (Satellite) : Magnetically-Shielded
Power Output (Satellite)  : 7W + 7W
Power Output (Subwoofer) : 13W
Speaker (Diameter)  : Satellite : 46mm, Subwoofer: 95mm
Speaker Impedance : Satellite : 10ohms, Subwoofer: 5ohms
Amplifier Input Impedance : 5 kohms (at 1 kHz)
Input : Stereo mini jack × 1
Speaker Cable  : Satellite(approx. 2.0 m) x 2
Power Source  : DC 12V (supplied AC power adaptor)
Dimensions (W x H x D) (Satellite Speakers)   : Approx. 94 x 176 x 119 mm
Dimensions (W x H x D) (Subwoofer) : Approx. 200 x 196 x 213 mm
Weight : Satellite Speakers : Approx. 400g, Subwoofer : Approx 1,300g
Supplied Accessories : AC power adaptor x 1, Operating Instructions x 1, Audio cable (stereo-mini plug　←→　stereo-mini plug, approx. 2 m)