<p><strong>What's in the Box:</strong></p> <ul> <li>Amplifier </li> <li>PA microphone </li> <li>Birth sheet with tested power </li> <li>Owner&rsquo;s manual </li> <li>Mounting Screws </li> <li>Warranty </li> </ul> <p><strong> Features: <br /></strong></p> <ul> <li>Rockville KRYPTON MF4 2400 Watt Peak and 600w Dyno Certified RMS Class AB 4-Channel Marine Amplifier </li> <li><strong> Dyno Certified RMS Power Ratings: </strong> (Certified Dyno Test / Less than 1 % THD) (Use these ratings when comparing with top brands such as Kicker, Rockford Fosgate, etc) </li> <li>2 Ohm: 150 Watts x 4 Channels &lt;1% THD+N @ 14.4 Volts&nbsp; </li> <li>4 Ohm: 100 Watts x 4 Channels &lt;1% THD+N&nbsp;@ 14.4 Volts&nbsp; </li> <li>4 Ohm Bridged: 300 Watts&nbsp;x 2 Channels&nbsp;&lt;1% THD&nbsp;@ 14.4 Volts&nbsp; </li> <li><strong> Peak: </strong> (Use these ratings when comparing with the top budget brands such as Boss, Power Acoustik, etc)</li> <li>2 Ohm: 600 Watts x 4 Channels&nbsp; </li> <li>4 Ohm: 400 Watts x 4 Channels </li> <li>4 Ohm Bridged: 1200 Watts x 2 Channels&nbsp; </li> <li>Painted Conformal Coating PCB Board (Uses 2577 Waterproof Glue)&nbsp; </li> <li>Rustproof Aluminum heat sink with black hairline finish</li> <li>Stainless steel end panels are rustproof </li> <li>All screws and mounting hardware are stainless steel and rustproof </li> <li>Bottom panel is aluminum and rustproof </li> <li>Marine public address system with microphone with talkover function </li> <li>All channels on the amp have crossovers so they can each be used for subs or full range speakers or tweeters or midrange speakers </li> <li>All channels on the amplifier are bridgeable </li> <li>Digital Voltage Display on Amp </li> <li>Fully Adjustable 12dB / Octave Crossover with Differential Circuitry </li> <li>Adjustable Subsonic Filter: 15Hz -40Hz (This filter is on the HPF knob) </li> <li>Adjustable Low Pass Filter: 40Hz &ndash; 4KHz </li> <li>Adjustable Band Pass Filter: 15 Hz - 4 kHz (use both the HPF and LPF filter) </li> <li>Adjustable High Pass (Subsonic) Filter: 15 Hz - 4 kHz </li> <li>2CH/4CH Input Mode Switch </li> <li>8 Volt Preamp Circuitry </li> <li>Under Voltage Protection at 10V </li> <li>Over Voltage Protection at 16V&nbsp; </li> <li>High-Speed MOSFET Power Supply </li> <li>Full IC-Controlled Protection Circuitry </li> <li>Fully Adjustable 12dB Bass Equalizer </li> <li>Adjustable Input Level Control </li> <li>Studio-Grade Bipolar Output Stage Transistors&nbsp; </li> <li>Mute and Delay Soft Start System </li> <li>Status Mode LED Indicators </li> <li>Minimum THD at Rated Power: &lt; 0.05% </li> <li>S / N Ratio: &gt;90dB </li> <li>Frequency Response: 10Hz - 50KHz </li> <li>Damping Factor: &gt;85 @ 100Hz </li> <li>40 Amp x 2 ATC Fuses</li> <li>Color: Black</li> <li>Dimensions: (Lx W x H) 16.3˝ x 8.66˝ x 2.2˝</li> </ul> <p><a href="https://www.rockvilleaudio.com/content/Manuals/KRYPTON_Marine_Manual_Final.pdf"> Owner's Manual​ </a> ​​</p>