1. Suitable for: bass audio modification 2. Power: 220W 3. Applicable impedance: 4-8 ohms 4. Frequency point: 500Hz/550Hz (adjustable) 5. Filter: pure bass crossover frequency 6. Bass adjustment switch, fluctuation switch to adjust the different bass effects 7. More audio capacitors in parallel, filter out most of the mid-range and high frequency 8. High-temperature copper-clad aluminum wire winding, durability, to provide long-lasting performance and stable audio output 9. Size: 103 x 72 x 35mm 10. Weight: about 140g