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Key Specs
Continuous Watts x Channel @ Ohms: 85 x 4
Maximum Watts x Channel @ Ohms: 85W x 4 x 2 ohms (This is the maximum load the speaker, subwoofer or amp can drive.)
Amplifier Class: D (An amplifier's mode of operation, specifically the conditions in which its electrical current flows for the duration of an audio signal, determines its class. Each class has its strengths and weaknesses when it comes to power efficiency, levels of crossover distortion, and overall sound quality.)
Number Of Channels: 4
Bass Boost: Yes (Circuitry that boosts the bass response of the amplifier, improving audio reproduction enhancing the sound of low frequencies. Fixed boost means the level of bass response is preset, whereas variable boost allows the user to make adjustments.)
Bridgeable: true (Bridging an amplifier increases the power it supplies to the speaker(s).)
Low-Pass Crossover: Selectable (Devices with this function allow only audio frequencies below a chosen cut-off frequency to pass through to a speaker or sound system. A device may have a cut-off frequency predetermined by its manufacturer (fixed), multiple cut-off frequency options to choose from (selectable), or have the capability for the frequency to be configured by the user (variable).)
High-Pass Crossover: Selectable (Devices with this function allow only audio frequencies above a chosen cut-off frequency to pass through to a speaker or sound system. A device may have a cut-off frequency predetermined by its manufacturer (fixed), multiple cut-off frequency options to choose from (selectable), or have the capability for the frequency to be configured by the user (variable).)
Speaker-Level Inputs: true (Also referred to as high-level inputs. Enables the amplifier to receive a sound signal from another device that does not have RCA, or low-level, inputs.)
General
Product Name: X-Power 650W Class D Digital Multichannel Amplifier with Selectable Crossover
Brand: Alpine
Mounting Hardware Included: true
Model Number: MRX-F35
Audio Power
Continuous Watts x Channel @ Ohms: 85 x 4
Maximum Watts x Channel @ Ohms: 85W x 4 x 2 ohms (This is the maximum load the speaker, subwoofer or amp can drive.)
Amplifier Class: D (An amplifier's mode of operation, specifically the conditions in which its electrical current flows for the duration of an audio signal, determines its class. Each class has its strengths and weaknesses when it comes to power efficiency, levels of crossover distortion, and overall sound quality.)
Audio
Number Of Channels: 4
Signal-to-Noise Ratio (SNR): 104 decibels (The ratio of the desired signal's strength to the level of background noise. A ratio higher than 1:1, which equates to greater than 0 decibels, indicates more signal than noise.)
Bass Boost: Yes (Circuitry that boosts the bass response of the amplifier, improving audio reproduction enhancing the sound of low frequencies. Fixed boost means the level of bass response is preset, whereas variable boost allows the user to make adjustments.)
Features
Bridgeable: true (Bridging an amplifier increases the power it supplies to the speaker(s).)
Low-Pass Crossover: Selectable (Devices with this function allow only audio frequencies below a chosen cut-off frequency to pass through to a speaker or sound system. A device may have a cut-off frequency predetermined by its manufacturer (fixed), multiple cut-off frequency options to choose from (selectable), or have the capability for the frequency to be configured by the user (variable).)
High-Pass Crossover: Selectable (Devices with this function allow only audio frequencies above a chosen cut-off frequency to pass through to a speaker or sound system. A device may have a cut-off frequency predetermined by its manufacturer (fixed), multiple cut-off frequency options to choose from (selectable), or have the capability for the frequency to be configured by the user (variable).)
MOSFET Power Supply: false (A specific type of power supply with the advantages of high switching speed and efficiency at low voltages.)
Input
Line-Level Inputs: true (Also referred to as low-level inputs. Enables the amplifier to receive a sound signal from another device via RCA cables.)
Speaker-Level Inputs: true (Also referred to as high-level inputs. Enables the amplifier to receive a sound signal from another device that does not have RCA, or low-level, inputs.)
Dimensions
Product Height: 2.25 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
Product Width: 9.88 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
Product Depth: 9 inches (The out of box depth of the item. Depth is measured as the distance from the front of the item to the back as it would be primarily used or placed.)
Product Weight: 3 pounds (The out of box weight of the item.)
Other
UPC: 793276011763
Enjoy rich audio with this Alpine X-Power MRX-F35 650W Class D digital multichannel amplifier that features a built-in selectable crossover with ultrawide frequency bandwidth for enhanced sound quality. PDX technology delivers bold, vibrant sound.
Delivers up to 55W RMS (continuous) @ 4 ohms or 85W RMS @ 2 ohms: For powerful sound. Up to 170W continuous bridged.
Selectable high- and low-pass crossover: Ensures flexible operation.
PDX technology: Features global modulation with adaptive feedback control loop circuitry to help minimize distortion, ultralow output impedance for controlled, tight bass and a -24dB octave slope for enhanced subwoofer performance.
4-channel nonfading speaker input connection: Helps simplify installation. Buffered pre-out makes it easy to add additional amplifiers.
Remote sensing: Automatically turns on the amplifier when voltage is detected.
Multistage power management: Continuously monitors component temperatures to allow smooth, uninterrupted music playback.
Compact design: Allows flexible placement.
Whats Included
Alpine X-Power 650W Class D Digital Multichannel Amplifier with Selectable Crossover
Owner's manual
The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Rated 3 out of 5 stars
second mrx-f35 that malfunctions on me :(
Well, like the title says. You can also see the full detail on my last review of the same amp. I used the high level inputs with my stock amp that only gives max 9.5 volts but from my deck volume, it has a clear signal at 33 out of 35 and at 33 my voltage is 5 volts and the amp claims to be able to take up to 10 volts. Unfortunately I wasn't able to test out the low level RCA inputs because I didn't have an RCA converter so I can't recommend this amp to anyone due to my bad experience with this amp. I now have a JL Audio HD600/4 with an Audio control LC6I to run my system right and I have had no issue with that amp. Matter of fact that amp is so much louder then my mrx-m55 bass amp so I had to upgrade that to the HD750/1 amp. If your looking for a good bass amp I would highly recommend the mrx-m55, it's a beast for such a small amp.
Posted by MRRUIZ
Rated 4 out of 5 stars
Nice amp. For what I'm doing
You just really can't go wrong with alpine. Good power and sound quality
Posted by Ford350
Rated 5 out of 5 stars
Clean
Easy install, great performance. Never any issues.