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40W x 4 @ 4Ω

Amplifiers with a Power Output Rating of 40-Watts x 4-Channels, 4-Ohm Final Impedance

Amplifiers with a Power Output Rating of 40-Watts x 4-Channels, 4-Ohm Final Impedance

RMS power: This rating of any amplifier is the continuous power rating that an amp is designed to output at a maximum continued volume rating. The RMS power specification is one of two numbers to go by when pairing your speakers with an amplifier, not the only 2 but a good starting point. As an example, a speaker driver with a 40-Watt, or 40W for short, RMS rating should be paired with a forty-watt RMS amplifier. We usually recommend an amp to be over powered by 10% RMS so that the power-plant does not have to work at 100% capacity to get 100-percent efficiency from your speakers. This will keep your amplifier from overheating during long periods of continuous operation.

Ohms: Is the resistance rating of an amp and is the second most important when pairing drivers with amplifiers. A power-plant that is 40W @ 4-ohm might put out 80-Watts @ 2Ω. When purchasing an amplifier, the correct pairing of a speaker’s RMS wattage and Ohm ratings with an amp’s output power rating is absolutely essential.

1 product

  • Alpine S-A55V : 460W Amplifier, 40W x 4ch + 300W Sub @ 2Ω

    Alpine S-A55V : 460W Amplifier, 40W x 4ch + 300W Sub @ 2Ω

    Pre-Order Today!

    Alpine S-Series 40-Watt x 4-Channel Power Amplifier with 300-Watt Sub Channel @ 2Ω The S-Series amplifiers are designed to fit anywhere. The S-A55V 5-Channel model measures at 11.25” W x 8” H x 2.25” D and can be mounted under seats or behind panels. It proves to be the all-in-one solution for a multi-amp system, so you can enjoy big power output in a limited installation space. The S-Series amplifiers contain technology that was previously only available in our premium line up of amplifiers, the R- and X-Series models. The S-Series models are based on Alpine’s intelligent amplifier platform that ensures superior sound reproduction and precision imaging. With an improved heat sink, and protection circuit design that eliminates thermal shut-down, your music will keep playing no matter where your drive takes you. Specifications Alpine's Class D amplifier circuit 40W RMS x 4 +200W RMS x 1(4Ω, 14.4V, ≤ 1% THD+N) 60W RMS x 4 +300W RMS x 1(2Ω, 14.4V, ≤ 1% THD+N) Bridged: 120W RMS x 2 (4Ω, 14.4V, ≤  1% THD+N) S/N >83dB (ref. 1W into 4Ω) THD+N ≤ 0.03% (ref. 1W into 4Ω) Frequency response =10Hz to 30kHz (+/-3dB) Damping Factor: CH 1/2/3/4 >100, CH 5 >750 Alpine S-A55V Manual

    Pre-Order Today!

    $429.99

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