Db Boulevard - Hard Frequency
- Hard Frequency (Megahertz Club mix)
- Hard Frequency (Original Club mix)
- Hard Frequency (Original radio edit)
- Hard Frequency (vocal radio edit)
- Hard Frequency (vocal Club mix)
- Frequency (Original Club mix)
- Frequency (Megahertz Club mix)
- Hard Frequency Antonilli Extended
- Hard Frequency Antonilli radio mix
- Hard Frequency Frequency Club mix
- Hard Frequency Megahertz mix
- Hard Frequency radio edit
- Hard Frequency vocal 12 mix