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2015 BMW 650i

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Use our shopping filters to find the right 2/3/4-channel amp to power upgraded speakers properly.

Overview Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Independance Day Sale

Amps for Adding Speakers for 2015 BMW 650i

Some vehicles require an amp bypass module, a line-output converter like the NVX XLCA2 or AudioControl LC2i, or a DSP to integrate with your factory radio and avoid bass roll-off. Bass roll-off occurs when a factory radio's crossover is designed only for the original equipment speakers, resulting in a not complete signal being sent to your new aftermarket amp.

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Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Remote bass/level controller
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
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Rockford Fosgate Power T400X4ad with Amplifier Wiring Kit

Compact 4-channel amplifier (4 x 100 Watts RMS @ 4 ohms)

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Rockford Fosgate Power T400X4ad with Amplifier Wiring Kit

Compact 4-channel amplifier (4 x 100 Watts RMS @ 4 ohms)

• 4 ohm: 100 watts x 4 chan.
• 2 ohm: 100 watts x 4 chan.
• Bridged, 4 ohm: 200 watts x 2 chan.
• Total Power: 400 Watts
• CEA-2006 Compliant
• C.L.E.A.N. Technology
• Fan Cooled

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• 4 ohm: 100 watts x 4 chan.
• 2 ohm: 100 watts x 4 chan.
• Bridged, 4 ohm: 200 watts x 2 chan.
• Total Power: 400 Watts
• CEA-2006 Compliant
• C.L.E.A.N. Technology
• Fan Cooled

Pioneer GM-DX975 with NVX 4 Gauge Amp Kit

2000W Peak (800W RMS) GM Series Class-D 5-Channel Amplifier with Remote Bass Knob

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Pioneer GM-DX975 with NVX 4 Gauge Amp Kit

2000W Peak (800W RMS) GM Series Class-D 5-Channel Amplifier with Remote Bass Knob

• 75 watts x 4 channel + 350 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 75 watts x 4 channel + 350 watts x 1 channel @ 4 ohm
• 100 watts x 4 channel + 600 watts x 1 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm + 600 watts x 1 channel @ 2 ohm
• Total RMS Power: 800 watts
• Class D 2 ohm Stable 5-Channel Amplifier
• Includes Amplifier Wiring Kit

Diamond Audio MICRO4V2 with NVX 1/0 Gauge Amp Kit

600W Peak Series Class-D 4-Channel Compact Amplifier

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Diamond Audio MICRO4V2 with NVX 1/0 Gauge Amp Kit

600W Peak Series Class-D 4-Channel Compact Amplifier

• 80 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 80 watts x 4 channel @ 4 ohm
• 150 watts x 4 channel @ 2 ohm
• Bridged: 300 watts x 2 channel @ 4 ohm
• Total RMS Power: 600 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Cerwin Vega B54 with Belva 4 Gauge Amp Kit

1200W 4-Channel Bomber Series Class D Amplifier with 4 Gauge Amp Kit

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Cerwin Vega B54 with Belva 4 Gauge Amp Kit

1200W 4-Channel Bomber Series Class D Amplifier with 4 Gauge Amp Kit

• RMS: 80 Watts x 4 @ 4 ohm, 150 Watts x 4 @ 2 ohm, Bridged: 300 Watts x 2 @ 4 ohm
• Total Peak Power: 1000 Watts
• Class D IR Chipset with DirectFET Power Mosfet Output
• Wired remote bass level control included
• Ultra Compact High Density Aluminum Alloy Chassis
• Dimensions: 4.02" W x 8.70" L x 1.40" H

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• RMS: 80 Watts x 4 @ 4 ohm, 150 Watts x 4 @ 2 ohm, Bridged: 300 Watts x 2 @ 4 ohm
• Total Peak Power: 1000 Watts
• Class D IR Chipset with DirectFET Power Mosfet Output
• Wired remote bass level control included
• Ultra Compact High Density Aluminum Alloy Chassis
• Dimensions: 4.02" W x 8.70" L x 1.40" H

Alpine KTP-445A with NVX 8 Gauge Amp Kit

180W RMS Power Pack Series Class D 4-Channel Compact Amplifier

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Alpine KTP-445A with NVX 8 Gauge Amp Kit

180W RMS Power Pack Series Class D 4-Channel Compact Amplifier

• 45 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Total RMS Power: 180 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 45 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Total RMS Power: 180 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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NVX NBA201 Amplifier + NVX 4 Gauge Premium Amp Wiring Kit

700W Total RMS N-Series Class-AB 2-Channel Amplifier Package (Includes Amplifier and Amp Wiring kit)

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NVX NBA201 Amplifier + NVX 4 Gauge Premium Amp Wiring Kit

700W Total RMS N-Series Class-AB 2-Channel Amplifier Package (Includes Amplifier and Amp Wiring kit)

• 200 watts x 2 channel @ 4 ohm
• 350 watts x 2 channel @ 2 ohm
• Bridged: 1400 watts x 1 channel @ 4 ohm
• Total RMS Power: 700 watts
• CEA-2006 Compliant

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• 200 watts x 2 channel @ 4 ohm
• 350 watts x 2 channel @ 2 ohm
• Bridged: 1400 watts x 1 channel @ 4 ohm
• Total RMS Power: 700 watts
• CEA-2006 Compliant

Deaf Bonce MFA 4.180 with Belva 4 Gauge Amp Kit

1080W RMS Machete Series Class D 4-Channel Car Amplifier

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Deaf Bonce MFA 4.180 with Belva 4 Gauge Amp Kit

1080W RMS Machete Series Class D 4-Channel Car Amplifier

• 180 watts x 4 channel @ 4 ohm
• 270 watts x 4 channel @ 2 ohm
• Bridged: 540 watts x 2 channel @ 4 ohm
• Total RMS Power: 1080 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 180 watts x 4 channel @ 4 ohm
• 270 watts x 4 channel @ 2 ohm
• Bridged: 540 watts x 2 channel @ 4 ohm
• Total RMS Power: 1080 watts
• Class D 2 ohm Stable 4-Channel Amplifier
• Includes Amplifier Wiring Kit

Deaf Bonce Apocalypse Atom 900.2 with Belva 4 Gauge Amp Kit

900W RMS Class D Apocalypse Atom Pro Series 2-Channel Car Amplifier

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Deaf Bonce Apocalypse Atom 900.2 with Belva 4 Gauge Amp Kit

900W RMS Class D Apocalypse Atom Pro Series 2-Channel Car Amplifier

• 350 watts x 2 channel @ 4 ohm
• 510 watts x 2 channel @ 2 ohm
• 900 watts x 2 channel @ 1 ohm
• Bridged: 1020 watts x 1 channel @ 4 ohm
• 1000 watts @ 2 ohm
• Total RMS Power: 900 watts
• Class D 1 ohm Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 350 watts x 2 channel @ 4 ohm
• 510 watts x 2 channel @ 2 ohm
• 900 watts x 2 channel @ 1 ohm
• Bridged: 1020 watts x 1 channel @ 4 ohm
• 1000 watts @ 2 ohm
• Total RMS Power: 900 watts
• Class D 1 ohm Stable 2-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

Rockford Fosgate Power T1000-4AD with Amplifier Wiring Kit

1000W 4-Channel Class AD Power Series Constant Power Amplifier

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Rockford Fosgate Power T1000-4AD with Amplifier Wiring Kit

1000W 4-Channel Class AD Power Series Constant Power Amplifier

• 1000W RMS
• 250W x 4-Chan @ 4 Ohm
• NOMAD Real Time Computer Protection
• 50-500 Hz LP/AP/HP Crossovers
• Includes Amplifier Wiring Kit

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• 1000W RMS
• 250W x 4-Chan @ 4 Ohm
• NOMAD Real Time Computer Protection
• 50-500 Hz LP/AP/HP Crossovers
• Includes Amplifier Wiring Kit

Crunch DR-2525.4D with Belva 4 Gauge Amp Kit

2525W Peak Class D V-Drive Series 4-Channel Full Range Car Amplifier

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Crunch DR-2525.4D with Belva 4 Gauge Amp Kit

2525W Peak Class D V-Drive Series 4-Channel Full Range Car Amplifier

• 320 watts x 4 channel @ 4 ohm
• 630 watts x 4 channel @ 2 ohm
• Bridged: 1260 watts x 2 channel @ 4 ohm
• Total peak power output: 2525 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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• 320 watts x 4 channel @ 4 ohm
• 630 watts x 4 channel @ 2 ohm
• Bridged: 1260 watts x 2 channel @ 4 ohm
• Total peak power output: 2525 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

Rockford Fosgate Punch PM500X2 + NVX XKIT42 4 Gauge Amp Wiring Kit

500W Punch Series Class A/B 2-Channel Marine Amplifier

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Rockford Fosgate Punch PM500X2 + NVX XKIT42 4 Gauge Amp Wiring Kit

500W Punch Series Class A/B 2-Channel Marine Amplifier

• 150 watts RMS x 2 chan. @ 4 ohm
• 250 watts RMS x 2 chan. @ 2 ohm
• 500 watts RMS x 1 chan. @ 4 ohm Bridged
• CEA-2006 Compliant
• Features C.L.E.A.N. Set-up
• Protected against Dust, UV, & Corrosion
• Marine grade two part epoxy coating on circuit boards
• Includes NVX XKIT42 4 Gauge Amp Wiring Kit

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• 150 watts RMS x 2 chan. @ 4 ohm
• 250 watts RMS x 2 chan. @ 2 ohm
• 500 watts RMS x 1 chan. @ 4 ohm Bridged
• CEA-2006 Compliant
• Features C.L.E.A.N. Set-up
• Protected against Dust, UV, & Corrosion
• Marine grade two part epoxy coating on circuit boards
• Includes NVX XKIT42 4 Gauge Amp Wiring Kit

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Rockford Fosgate Punch PBR300X2 + NVX XKIT82 8 Gauge Amp Wiring Kit

300 Watts Punch Series Boosted Rail Compact 2-Channel Amplifier

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Rockford Fosgate Punch PBR300X2 + NVX XKIT82 8 Gauge Amp Wiring Kit

300 Watts Punch Series Boosted Rail Compact 2-Channel Amplifier

• RMS 100W x 2 @ 4 ohm, 150W x 2 @ 2 ohm, 300W x 1 @ 4 ohm Bridged
• Features Rockford Fosgate's Class-BR Topology
• CEA-2006 Compliant
• Ultra Compact Chassis
• Boosted Rail Design
• Dimensions: 6.75"L x 4.25"W x 1.53"H
• Includes NVX XKIT82 8 Gauge Amp Wiring Kit

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• RMS 100W x 2 @ 4 ohm, 150W x 2 @ 2 ohm, 300W x 1 @ 4 ohm Bridged
• Features Rockford Fosgate's Class-BR Topology
• CEA-2006 Compliant
• Ultra Compact Chassis
• Boosted Rail Design
• Dimensions: 6.75"L x 4.25"W x 1.53"H
• Includes NVX XKIT82 8 Gauge Amp Wiring Kit

Kenwood eXcelon XM160-2 with NVX 8 Gauge Amp Kit

160W RMS eXcelon Series Class D 2-Channel Compact Amplifier for select 2014-up Harley-Davidson® motorcycles

XM1602_XKIT82 big
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Kenwood eXcelon XM160-2 with NVX 8 Gauge Amp Kit

160W RMS eXcelon Series Class D 2-Channel Compact Amplifier for select 2014-up Harley-Davidson® motorcycles

• 80 watts x 2 channel @ 2 ohm
• Total RMS Power: 160 watts
• Class D 2 ohm Stable 2-Channel Amplifier
• Plug & Play Power, Speaker, & Input Wiring
• Includes Amplifier Wiring Kit

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• 80 watts x 2 channel @ 2 ohm
• Total RMS Power: 160 watts
• Class D 2 ohm Stable 2-Channel Amplifier
• Plug & Play Power, Speaker, & Input Wiring
• Includes Amplifier Wiring Kit

Kenwood KAC-D8105 with NVX 4 Gauge Amp Kit

1600 Watts Max Power 5-Channel Class D Amplifier

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Kenwood KAC-D8105 with NVX 4 Gauge Amp Kit

1600 Watts Max Power 5-Channel Class D Amplifier

• Kenwood KAC-D8105 5 Channel Amplifier
• Peak Power: 1600 watts
• 50 watts RMS x 4 + 300 watts at 4 Ohm
• 75 watts x4 + 500 watts at 2 Ohm
• Dimensions: 9"W x 2-3/16"H x 7-3/8"D

• Includes Amplifier Wiring Kit

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• Kenwood KAC-D8105 5 Channel Amplifier
• Peak Power: 1600 watts
• 50 watts RMS x 4 + 300 watts at 4 Ohm
• 75 watts x4 + 500 watts at 2 Ohm
• Dimensions: 9"W x 2-3/16"H x 7-3/8"D

• Includes Amplifier Wiring Kit

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Rockford Fosgate Punch P500X2 + NVX XLCA2 Line-Output-Converter + Amp Kit

500W RMS 2-Channel Amplifier (P500X.2) + NVX 2-Channel L.O.C + 4 Gauge Amp Kit

P500X2, XLCA2, BAK42 big
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Rockford Fosgate Punch P500X2 + NVX XLCA2 Line-Output-Converter + Amp Kit

500W RMS 2-Channel Amplifier (P500X.2) + NVX 2-Channel L.O.C + 4 Gauge Amp Kit

• 150W x 2 Chan. @ 4 ohm
• 250W x 2 Chan. @ 2 ohm
• Built In NOMAD "Real Time" Analog Computer
• 2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• MESHA3 Reduces MOSFET Temperatures for Improved Durability

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• 150W x 2 Chan. @ 4 ohm
• 250W x 2 Chan. @ 2 ohm
• Built In NOMAD "Real Time" Analog Computer
• 2/1 Channel Operation
• 4 Gauge Power and Ground Inputs
• MESHA3 Reduces MOSFET Temperatures for Improved Durability

Rockford Fosgate R2-750X5 with Amplifier Wiring Kit

Rockford Fosgate Prime 600W 5-Channel Full Range Amplifier

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Rockford Fosgate R2-750X5 with Amplifier Wiring Kit

Rockford Fosgate Prime 600W 5-Channel Full Range Amplifier

• 50 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 600 Watts
• CEA-2006 Compliant
• Balanced Differential Inputs with RCA Pass Through Outputs
• Variable Infrasonic Filter
• Includes Amplifier Wiring Kit

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• 50 Watts RMS x 4 @ 4 ohm
• 100 Watts RMS x 4 @ 2 ohm
• Total Peak Power: 600 Watts
• CEA-2006 Compliant
• Balanced Differential Inputs with RCA Pass Through Outputs
• Variable Infrasonic Filter
• Includes Amplifier Wiring Kit

Alpine KTA-450 with NVX 8 Gauge Amp Kit

4-Channel 200 Watt RMS Power Pack Amplifier

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Alpine KTA-450 with NVX 8 Gauge Amp Kit

4-Channel 200 Watt RMS Power Pack Amplifier

• Class D 4-channels Power Pack Amplifier
• Power Handling: 50W RMS x 4 @ 4ohm/45W RMS x 4 @ 2ohm
• Dynamic Peak Power (DPP)
• Frequency Response: 15-50 Hz
• CTA-2006 compliant
• Includes Amplifier Wiring Kit

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• Class D 4-channels Power Pack Amplifier
• Power Handling: 50W RMS x 4 @ 4ohm/45W RMS x 4 @ 2ohm
• Dynamic Peak Power (DPP)
• Frequency Response: 15-50 Hz
• CTA-2006 compliant
• Includes Amplifier Wiring Kit

DS18 SXE-1200.4/BK (Black) with Belva 4 Gauge Amp Kit

1200W Peak (400W RMS) Class AB SXE Series 4-channel Car Amplifier

SXE12004BK_BAK44 big
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DS18 SXE-1200.4/BK (Black) with Belva 4 Gauge Amp Kit

1200W Peak (400W RMS) Class AB SXE Series 4-channel Car Amplifier

• 60 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class A/B 2 ohm Stable 4-Channel-Channel Amplifier (Black)
• Includes Amplifier Wiring Kit

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• 60 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class A/B 2 ohm Stable 4-Channel-Channel Amplifier (Black)
• Includes Amplifier Wiring Kit

DS18 SXE-2000.4D/RD (Red) with Belva 4 Gauge Amp Kit

2000W Peak (640W RMS) Class D SXE Series 4-Channel Car Amplifier

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DS18 SXE-2000.4D/RD (Red) with Belva 4 Gauge Amp Kit

2000W Peak (640W RMS) Class D SXE Series 4-Channel Car Amplifier

• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 3 channel @ 4 ohm
• Total RMS Power: 640 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier (Red)
• Includes Amplifier Wiring Kit

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• 100 watts x 4 channel @ 4 ohm
• 160 watts x 4 channel @ 2 ohm
• Bridged: 320 watts x 3 channel @ 4 ohm
• Total RMS Power: 640 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier (Red)
• Includes Amplifier Wiring Kit

JVC KS-DR2004D with Belva 8 Gauge Amp Kit

600W Peak (150W RMS) DRVN Series Class-D 4-Channel Marine Amplifier

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JVC KS-DR2004D with Belva 8 Gauge Amp Kit

600W Peak (150W RMS) DRVN Series Class-D 4-Channel Marine Amplifier

• 50 watts x 4 channel @ 4 ohm
• 75 watts x 4 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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List price $378.79
-21% $299.00

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• 50 watts x 4 channel @ 4 ohm
• 75 watts x 4 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier
• Includes Amplifier Wiring Kit

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