Massive Audio SUMMO64XL

300W Max (150W RMS) 6.5" Single 4 Ohm Car Audio Subwoofer

Only 2 Left!

• Peak Power: 300 watts
• RMS Power: 150 watts
• Kevlar Fiber Cone
• Foam Surround
• Impedance: Single 4 ohms
• Mount depth: 4.37"
• Sensitivity: 85 dB

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Massive Audio

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The Massive Audio SUMMO64XL is a powerful 6.5 inch Subwoofer that produces high SPL while allowing you to save as much space possible in your vehicle. High quality materials are utilized and bolted to a durable cast basket and 55oz magnet. 

The SUMMO64XL Subwoofers small stature will impress even hard core audio enthusiasts. As with all SUMMO XL Series subwoofers, we deign them all to play so low and with such a deep center of force that the competition cannot help but to bow out gracefully. 

Let there be no doubt that with Massive Audio you will be the "King of the Ring"

Product Details:

  • 6.5" Single 4 ohms Massive Audio Summo XL Series Subwoofer
  • Power Handling:
    • Peak: 300 watts
    • RMS: 150 watts
  • Kevlar Fiber Cone
  • Foam Surround
  • Die Cast Basket with Black Textured Finish
  • Fiberglass Woven Dust Cap
  • Enhanced Cooling T-yoke Design with Black Anodized Finish
  • 1.5" High Temperature Voice coil
  • 10 mm Xmax
  • 55 oz. Double Stacked Ferrite magnet motor structure
  • Resonance Frequency (Fs): 63.596 Hz
  • Sensitivity: 85 dB
  • Sealed box volume: 0.45 cubic feet
  • Ported box volume: 0.6 cubic feet
  • Top-mount depth: 4.37"
  • Cutout diameter: 5.94"
  • Authorized Internet Dealer
  • Protective subwoofer grille: No
  • 1-year Manufacturer's Warranty

  • Priced Individually

Product history:

Massive Audio SUMMO64XL thumbnail
(newest, current model)
Massive Audio SUMMO 64 thumbnail
(previous model, replaced by Massive Audio SUMMO64XL)

Subwoofer Wiring Guide

Wiring Guide to Wire 1 Massive Audio SUMMO64XL Subwoofer

Mono Amp

2 Channel Amp - Bridged

Wiring Guide to Wire 2 Massive Audio SUMMO64XL Subwoofers

Mono Amp

2 Channel Amp

4 Channel Amp - Bridged

Wiring Guide to Wire 3 Massive Audio SUMMO64XL Subwoofers

4 Channel Amp

Wiring Guide to Wire 4 Massive Audio SUMMO64XL Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Specifications & Details

Subwoofer Specifications
Massive Audio Summo XL Series
Subwoofer Size
Peak Power Handling
300 watts
RMS Power Handling
150 watts
Voice Coil(s)
Impedance (Per Voice Coil)
4 ohms
Voice Coil Diameter
85 dB
Xmax (millimeters)
10 mm
Subwoofer Design
Round / Circle
Main Cone Color
Woofer Composition
Kevlar Fiber
Woofer Surround
Magnet Structure
Double Stacked
Magnet weight
55 oz.
Magnet Type
Subwoofer Grille
Re-Cone Kit Available
Recommended Enclosure Specifications
Recommended Enclosure Type
Ported / Vented
Minimum Sealed Box Volume
0.45 cubic feet
Maximum Sealed Box Volume
0.65 cubic feet
Minimum Ported Box Volume
0.6 cubic feet
Maximum Ported Box Volume
0.85 cubic feet
Top-Mount Depth (Mounting Depth)
Cutout Diameter
Shallow Mount Installation
Electromechanical Parameters
Free-Air Resonance (Fs)
63.596 Hz
Equivalent Compliance (Vas)
2.552 liters
Total Speaker Q Value (Qts)
Electrical Q Value (Qes)
Electrical Resistance of Voice Coil (Re)
3.2 ohms
Mechanical Q Value (Qms)
What is in the box?
User manual
WITB: Subwoofers
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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Serious sound in small package

I ordered one of these just to test them out. I built a ported enclosure to the manufacturer specs. This little guy blew away everyone who heard it and swore it was a larger subwoofer. At one point I decided to put my 1200 RMS amplifier to it, do not recommend, it withstood two songs with only a small hint of clipping. after I let it cool down I continued to use it regularly with no issues. Wonderful little subwoofer.

By CmfB on January 7, 2021


found this helpful.

Great in-home subs I'm using

These are great, I'm using them in my lounge room, they add terrific balance with my 6.5.

By Jay on August 3, 2023 checkmarkIcon Verified purchase


found this helpful.


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