Markbass F1 main features include:

• OUTPUT POWER 300W RMS @ 8 ohm, 500W RMS @ 4 ohm 
• GAIN –80 dB to +25 dB range 
• GROUND LIFT switch on rear panel 
• LOW EQ center frequency: 40 Hz; level: ±16 dB 
• LOW MID center frequency: 360 Hz, level: ±16 dB 
• HIGH MID center frequency: 800 Hz, level: ±16 dB 
• HIGH center frequency: 10 kHz shelf: ±16 dB 
• VPF (Variable Pre-shape Filter) center frequency 380 Hz (cut) 
• VLE (Vintage Loudspeaker Emulator) frequency range 250 Hz–20 kHz (cut) 
• Size: 10.04 in. / 25.5 cm X 10.87 in. / 27.6 cm X 1.73 in. / 4.4 cm (1U) 
• Weight: 2.1kg