50W x 8 @ 4Ω

Amplifiers with a Power Output Rating of 50-Watts x 8-Channels, 4-Ohm Final Impedance

Amplifiers with a Power Output Rating of 50-Watts x 8-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 50-Watt, or 50W for short, RMS rating should be paired with a fifty-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 50W @ 4-ohm might put out 100-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.

2 products

  • Alpine HDP-D90 : 12ch Hi-Res Automotive Amplifier, 50W x 8ch + 80W x 4ch @ 4Ω Alpine HDP-D90 : 12ch Hi-Res Automotive Amplifier, top side.

    Alpine HDP-D90 : 12ch Hi-Res Automotive Amplifier, 50W x 8ch + 80W x 4ch @ 4Ω

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    Using expertise gleaned from over five decades of crafting premium car audio products and trickle-down engineering and design from the Ultra Hi-Res AlpineF#1Status system technologies, the Alpine Status system features exceptional tooling and rich build quality for the best possible sound reproduction. Each component was hand-picked from the highest quality materials for the highest in-class audio performance, that when used as a complete system, can achieve 192kHz/24bit playback. Building a sound system while overcoming acoustical challenges in the interior environment of the vehicle is no easy feat, however, the HDP-D90 14-Channel Hi-Res Digital Sound Processor Amplifier provides flexible system building and Hi-Res processing power up to 192kHz/24 Bit for an infallible listening experience. Custom developed for Hi-Res Playback, the HDP-D90 has a 192kHz/64Bit internal sampling rate and an ultra-wide audio bandwidth of 10Hz-110kHz for recording studio-level sound. Intentional designs, like a copper-plated chassis, bring the signal-to-noise ratio up to >110dB and minimize noise and distortion during playback for complete music fidelity that’s true to the original source. The HDP-D90 includes multiple source inputs for flexible system building for the option to retain a factory head unit, add an aftermarket head unit, or the Alpine Status HDS-990 Digital Media Controller. For older vehicles with no source player, the HDP-D90 can also function as a standalone music source and can receive music sent directly from a smartphone with Bluetooth® wireless streaming. When paired with the Hi-Res HDS-990 Digital Media Player, you unlock even more control options for your processor while getting the highest-quality playback possible in your vehicle. With 12-channels of amplifier outputs, the HDP-D90 can be used as a standalone source to power a 2-Way Speaker System, or for a more dynamic listening experience, includes 10- channels of RCA output for adding additional amplifiers to power a 3-way speaker system. The Alpine Status System is sold separately and can be used to build a custom sound system. For best results, install the complete Alpine Status system together as a full system to achieve the highest in-class audio performance only second to the Ultra High-Resolution AlpineF#1System. Features High-Performance 14-Channel Digital Sound Processor Amplifier  Hi-Res Audio Playback (192kHz/24Bit)  PC Tuning Application  Selectable pre-configured sound system configurations  Embedded RTA signals for sound tuning  Bluetooth® audio streaming with included external module   Optional Controller   Specifications Hi-Res Audio Playback (192kHz/24Bit)  14-Channel Inputs (All DSP control) Inputs: 12-Channel Hi-level/2-Channel RCA/Optical (SPDIF)/Coaxial (Digital)  Outputs: 10-Channel RCA output/ 12-Channel High-Level amplified outputs (50W x 8 @ 4ohm + 80W x 4 @4ohm) 31 Band Parametric or Graphic EQ  Channel mixing by Matrix Input Summing Sampling Rate = Internal: 192kHz/32Bit  S/N: >110dB, THD: <0.001% Hi pass/low pass crossover per channel Time correction: up to7mm delay per channel Sigma DSP (ADAU1467x2)

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  • 8ch Marine Amplifier 50W x 8ch @ 4Ω, or 100W x 8 @ 2Ω : Kicker 44KXMA8008 8ch Marine Amplifier 50W x 8ch @ 4Ω, or 100W x 8 @ 2Ω : Kicker 44KXMA8008, top side.

    Kicker 48KXMA8008 : 8ch Marine Amplifier 50W x 8ch @ 4Ω, or 100W x 8 @ 2Ω

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    8-Channel Marine Amplifier, 50-Watt x 8ch @ 4-Ohm, 100-Watt x 8 @ 2-Ohm This KXM 8ch marine amplifier uses Class D power technology, KickEQ+™ for 18dB of amplified variable bass boost, and a powerful 24dB crossover and subsonic filter to give you onboard acoustic control to quickly tune your setup. This Kicker KXM 8 channel weatherproof amplifier can be used to power 50-100W for the satellite speakers, 200W RMS power for a sub channel can be readily available when 2 of the eight are bridged. Specifications RMS Power [Watts] @ 14.4V, 4Ω stereo, ≤ 1% THD+N: 50 x 8@ 14.4V, 2Ω stereo, ≤ 1% THD+N: 100 x 8@ 14.4V, 4Ω bridged mono, ≤ 1% THD+N: 200 x 4 Length [in, cm] 14 ¾, 37.4 Height [in, cm] 2 ⅛, 5.5 Width [in, cm] 8 5⁄16 , 21 Frequency Response [Hz] 10Hz–20kHz Signal-to-Noise Ratio [dB] 95 Input Sensitivity 250mV–10V Selectable Electronic Crossover Amp 1 and Amp 2: OFF/HP/LPVariable 10–5,000Hz with X10 switch Amp 3 and Amp 4: OFF/HP/LP/BPVariable HP, 10–500HzVariable LP, 40–5,000Hz with 10X switchSlope: 24dB/octave KickEQ+™ Bass Boost 0-18dB @ 40Hz CEA Power 50 x 8 @ 4 ohms, 14.4VDC, 1% THD, CEA-2006B (Watts) CEA Signal-to-Noise Ratio -75dB CEA-2006B (ref: 1W, A-weighted) Kicker KXMA Amplifier Manual

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