My current setting sounds weak

Do you have better ideas?
osc1 octave: 16'
osc1 wave: square
osc2 and 3 are turned off
Filter cutoff: 50Hz
Filter spacing: 0
Filter resonance: between 3 and 4
Filter keyb cont amount: 0
Filter Attack: 10:30 o'clock
Filter Decay: 1 o'clock
Filter Sustain: 0
Filter Release: 0
Amount to Filter: maximum
Volume Attack: 0
Volume Decay: 2 o'clock
Volume Sustain: 0
Volume Release: 0