The Ibanez SR300EMGB SR Series Midnight Gray Burst 4 String RH Bass Guitar has PowerSpan dual coil pickups.
 
Accu-cast B120 Bridge
The B120's extra-wide string slots can accommodate even the heaviest of gauges. The walls and channels of the new bridge plate effectively "trap" the saddles, ensuring perfect directional uniformity.
 
PowerSpan Dual Coil pickups
Developed by Ibanez, the exposed pole pieces of the PowerSpan Dual Coil pickups produce a stronger signal and increase the response of the higher frequencies without sacrificing low end. The result is a tone rich in harmonic detail and dynamic expression.
 
Ibanez Custom Electronics 3-band EQ w/3-way Power Tap switch
The 3-band EQ works in conjunction with a coil tap switch for maximum control over a wide variety of professional bass tones. Tap Mode (single coil) creates a punchy, dynamic sound with superior articulation. Series Mode (humbucking) delivers a full, warm tone, and Power Tap Mode provides the best of both worlds-combining the clarity of the single coil with the fat bottom end of the humbucker.
 
Jatoba Fretboard
Jatoba has a reddish brown color which produces a rich mid range with a crisp high end.
 
Controls
With the bass held in the playing position, there are three small knobs located towards the lower edge of the body. Directionally, from the lower bout towards the neck these knobs control treble boost/cut, mid boost/cut, and bass boost/cut knob. Above these are two larger knobs closer to the bridge. Of these, the knob closest to the end of the body is the pickup balance, and the knob located towards the neck is the volume knob. There are two switches on this bass. The switch closest to the lower edge of the body is a 3-way mid frequency switch. When the switch is in neck position, mid boost peak is at 250Hz. When the switch is in center position, mid boost peak is at 450Hz. When the switch is in bridge position, mid boost peak is at 800Hz. The other switch closer to the middle of the bass is the EQ bypass switch. When the switch is in neck position, the EQ is off. When the switch is in bridge position, EQ is on. When EQ is off, the treble knob works as a passive tone control knob.
 
Frequency Response
The bass boost/cut frequency curve has a peak at 20 Hz, the variable width becomes smaller toward the high range, and the variable width becomes zero at about 1000 Hz. The variable range of the peak frequency is approximately ±15 dB. The treble boost/cut frequency curve draws a mountain-shaped curve with a peak at around 10,000 Hz and zero variable range around 100 Hz. The variable range of the peak frequency is approximately ±15 dB. The mid-boost/cut frequency curve creates a bell-shaped curve that peaks at a specific frequency, and the variable range becomes zero near 20 Hz and around 10,000 Hz. The frequency peak can be switched to 700, 450 and 250 Hz. The variable range of the peak frequency is approximately ±15 dB.