Infinity PRIMUS 1270B + Alpine MRVM500 Amplifier + 4 Gauge Amp kit

1200W Max (300W RMS) 12" Primus Series Single/Dual 4 Ohm Car Loaded Subwoofer Enclosure

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• 1200 Watts Max
• 300 Watts RMS
• Polypropylene Cone
• Rubber Surround
• Stamped Steel Frame
• Black Carpeted Enclosure
• 5/8" Medium-Density Fiberboard Construction

Learn more about the primus1270bam_mrvm500_bak42
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Infinity Primus 1270B (PRIMUS1270BAM)

Single Loaded 12" Sealed Primus Series 4-ohm Subwoofer Enclosure
Quantity: 1

Product Details:

  • Sealed enclosure with 1 12" Primus Series Subwoofer
  • 5/8" medium-density fiberboard construction covered with Carpet
  • Power Handling:
    • Peak: 300 watts
    • RMS: 1200 watts
  • Final Impedance: 4-ohm
  • Polypropylene cone
  • Rubber surround
  • Compact Design
  • HARMAN Standard Reliability Testing
  • Stamped steel frame
  • Frequency Response: 35 - 200 Hz
  • Sensitivity: 91 dB
  • Dimensions: 17.250" L x 14.50" H x 7.625" W x 11.50" W2
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Alpine MRV-M500

1100W Peak (500W RMS) V-Power Series Class D Monoblock Amplifier
Quantity: 1

Product Details:

  • V Power Series Class D 2 ohms Stable Monoblock Amplifier
  • RMS Power Rating:
    • 4 ohms: 300 watts x 1 channel
    • 2 ohms: 500 watts x 1 channel
  • Total RMS power output: 500 watts
  • LED Power/Protect Light
  • Wired bass level remote control with optional Alpine RUX-KNOB.2
  • Speaker-level (high-level) inputs
  • 1 pair of pre-amp outputs
  • Signal sensing remote turn-on
  • 4-way protection circuitry (Over-Current, Over-Voltage, Under-Voltage, and Thermal Protection)
  • Input sensitivity:
    • Low level: .15 - 4 volts
    • High level: .4 - 10 volts
  • Frequency Response: 7 - 400 Hz
  • Total Harmonic Distortion (THD): .3%
  • Signal to Noise Ratio: 85 dB
  • Variable low-pass filter: 50 - 400 Hz
  • Variable Bass Boost: 0 - 12 dB
  • Fuse Rating: 60
  • 4 AWG gauge amplifier wiring kit is recommended for installation.
  • Dimensions: 7-7/8" L x 7-7/8" W x 2-3/16" H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty
  • MFR #: MRV-M500
Check out the Alpine MRV-M500 Owner's Manual

Belva BAK42BK

4 Gauge Premium (CCA) Copper Clad Aluminum Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 1200 Watts - GRAY
Quantity: 1

Product Details:

  • Complete 4 Gauge 2-Channel Amplifier Installation Kit
  • Designed for car audio systems up to 1200 watts RMS
  • Premium Powerflex power and ground wire provides optimal power transfer
  • Belva CCA wire is made from 30% copper while the competition uses only 10%
  • Helical Twist Construction Audio Interconnect RCA cables minimize noise and interference
  • MINI-ANL Fuse holder with a 80 amp fuse offers ideal protection for high powered systems
  • Complies to American Wire Gauge standards
  • Also available in Blue and Red
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Kit includes:

  1. 17 ft. (5.2 meters) Gray 4 gauge power wire
  2. 3 ft. (.91 meters) Black 4 gauge ground wire
  3. 17 ft. (5.2 meters) Gray 18 gauge remote lead wire
  4. 17 ft. (5.2 meters) Helical Twist 2-channel RCA interconnect cable
  5. 20 ft. (6.1 meters) 16 Gauge Speaker cable
  6. One MINI-ANL Fuse Holder with a 80 amp fuse
  7. One Black rubber firewall grommet
  8. One 4 Gauge Blue chrome plated ring terminals
  9. One 4 Gauge Black chrome plated ring terminal
  10. Three 18 Gauge Blue Spade terminal
  11. Two 18 Gauge Black Spade terminal
  12. One 18 Gauge Red butt connector
  13. Ten 4" Black zip ties

Specifications & Details

Subwoofer Specifications
Subwoofer Size
Total RMS Power Handling
300 watts
Total Peak Power Handling
1200 watts
Woofer Surround
Woofer Composition
Impedance (Per Voice Coil)
4 ohms
91 dB
Frequency Response
30 - 200 Hz
Subwoofer Design
Round / Circle
Enclosure Specifications
Box Type
Box Style/Shape
Second Width
Box Exterior Color
Box Finish
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details


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Customer Ratings & Reviews

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Customer Reviews

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Quality Product

The following review is for BAK42BK, which is a part of the bundle you are viewing.

Works very well with my Rockford Fosgate sub system in my car.

By Ronald on December 11, 2014


found this helpful.

good deal!

The following review is for BAK42BK, which is a part of the bundle you are viewing.

Pretty decent value for the price. Worked out great, thanks.

By Brett on January 29, 2015


found this helpful.


The following review is for BAK42BK, which is a part of the bundle you are viewing.

The wiring has done me right so far but the only thing I don't like is the speaker wires. You have to carefully split it so the wire doesn't show. Other than that minor thing everything was great and a great value!

By tyler on November 18, 2014


found this helpful.

Really good

The following review is for MRV-M500, which is a part of the bundle you are viewing.

Have this amp connected to my Dodge factory head unit using high level output connected to 2- 12inch pioneer champion series at 300 RMS 4ohm. unbelievable quality and sound. Once you tune your subwoofer and amp to specs you wil have no problem. more that enough bass needed, Great amp!!

By Ricky on July 29, 2014


found this helpful.

price is right

The following review is for BAK42BK, which is a part of the bundle you are viewing.

the price is right for this setup. the ground wire and the power wire are to big for my amp but i made them fit. better to have to much than not enough so if i upgrade to a larger amp it will be fine.

By Mark on November 13, 2014


found this helpful.

Alpine MRV-M500

The following review is for MRV-M500, which is a part of the bundle you are viewing.

My buddy had 1 of these running to pioneer 10s and it sound great Hit pretty hard great amp over all.Probably does a little more then rated 550/600 maybe.Very clean looking amp sturdy feeling and great clean sound

By josh on March 17, 2014


found this helpful.

Accessories for product

The following review is for BAK42BK, which is a part of the bundle you are viewing.

Just what I needed and made installation so much easier. Thanks

By Susie on February 9, 2015


found this helpful.

Great for the Price! 2 years still going strong!

The following review is for Primus 1270B, which is a part of the bundle you are viewing.

2021 Toyota Corolla LE Sedan Update April 2023
I replaced the original box that the Infinity 1270 in came with a Skar ported box. I know recommended port is less than what the Skar box is. If you want fast and clean bass leave it like this. Putting it in Skar box doubled the bass and was even louder than the Sound Ordnance B-17 Bandpass ported set up. All this time it is still being powered by a Belva BB200ABv2.

Bought July 2021
Just bought a Sound Ordnance B-17 Bandpass from Crutchfield last month and sold it a week after install. I personally like this infinity more, it does have less bass and shaking of the car compared to the B-17 Sub but the sound is a lot cleaner. Bandpass and ported boxes give you more of the car shaking experience with rap and EDM but if switch over to rock and other music it sounds horrible. If want that bass the car is messing and without the need to shake the car next to you the Infinity Primus is the sub. It has enough bass to actually enjoy the music and I definitely recommend the 1270B for someone looking for clean bass!

By Mehrdad on April 9, 2023 Checkmark Icon Verified purchase


found this helpful.

The perfect amp for my needs!

The following review is for MRV-M500, which is a part of the bundle you are viewing.

This little amp puts out just the right amount of power for my system. I mounted it behind an internal side panel so that it would be out of sight, and it fit perfectly. I haven't had any problems with it what so ever, and it really brought good sounding base to my sub woofer. I would definitely recommend this amp to my friends.

By Gregar on January 14, 2015


found this helpful.

awesome products

The following review is for BAK42BK, which is a part of the bundle you are viewing.

I run 2 12inch audiobahn exursions on this amp and it pushes them very well. The size is perfect not to big and fits right unerneath the seat or small space. The best part is it stays pretty cool even after running most the day.

By CJ on March 22, 2015


found this helpful.


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