Pyle - 4" Speakers: The wake speakers feature an impressive bass response. The ideal subwoofer speakers for your wakeboard tower. The dual 4inch speaker system kit is designed to provide outstanding performance in terms of output power, bandwidth extension and distortion. The pair features up to 4 Ohms impedance ensuring high quality sound at all times. The 4 inch dual wakeboard speakers are built and tested to withstand even the harshest aquatic conditions. Durable & marine grade materials keep your boat speakers waterproof and UV resistant.

General Features:

• waterproof marine grade Rated construction - rugged & weather-resistant housing
• Compact mountable design
• 2-way full range audio speaker system
• Titanium dome tweeters
• long excursion subwoofers
• anti-corrosion, UV resistant coating
• power Output: 300 Watt Max (150 Watt RMS)
• sound system: 4" subwoofers, 1.0" tweeters
• waterproof marine grade rating: ip-44
• Frequency response: 70Hz-20KHz
• Impedance: 4 ohms
• magnet: 10 oz.
• sensitivity: 90 db. 
• construction material: engineered ABS grills