Massive Audio 6" 400 Watt Subwoofer Dual 4 Ohm Shallow Mount SUMMO64S — Big Jeff Audio Dealer Platform
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Welcome To The Dealer Platform


Massive Audio 6" 400 Watt Subwoofer Dual 4 Ohm Shallow Mount SUMMO64S

Maximize Bass Reproduction and save on airspace via this innovative new design! This new cast basket and sealed bottom plate design will replace traditional bottom venting by redirecting the cooling from the pole piece vent to the bottom of the customized basket. this allows the subwoofer to be installed where the depth is limited. By bolting this machine screw through the back of the enclosure to the backplate of the subwoofer you will minimize 'box flexing' and reduce the airspace needed in the box itself!

This listing includes:
(1) 6" Subwoofer SUMMO64S

- Shallow Mount Design via Sealed Backplate & Customized Vented Cast Basket
- Bolt-To-Box Machined Hex Screw-on Magnet Backplate for Maximized Bass via Reduced Box Flexing
- Optimized Spider & High Rolled Edge for Superior Bass Reproduction
- Kevlar Fiber Enhanced Non-Pressed Paper Cone
- 4-Layer Hi-Temp 1.5" Voice Coil
- Fiberglass Woven Dust Cap
- Double Stacked 45oz High Energy Strontium Ferrite Magnets
- Enhanced Cooling T-yoke Design with Black Anodized Finish
- Customized Rubber Gasket and Magnet Boot
- 100% Pure Copper Cables with Direct Lead Connection
- Triple Black Poly Cotton Spiders with Mirror Image Layout


Size: 6"
Peak Watts: 400
RMS Watts: 200
Cone: Non-Pressed Paper
Voice Coil: Dual 4 Ohm
Surround: Red Stitching
Magnet: 45oz Double Stacked
Terminals: Heavy Duty Direct Input Wires Connection
Basket: Rugged Industrial Textured Cast
Tinsel Leads: Heavy Duty Triple
X-Max (2-Way): 8mm
SPL: 85dB

Ported Box: 0.574 ft3
Sealed Box: 13.8" x 8.1" x 8.88"
Diameter: 7.03"
Mounting Depth: 3.86"
Baffle Cut: 5.94"

Payment Information


We accept PayPal for all ebay orders. You can use your credit through PayPal as all major credit card are accepted by PayPal.

We accept PayPal for all international orders, your address must be verified with PayPal.

We are not responsible for any custom duties or brokerage fees that may apply for all international orders.

When you click on the Buy it Now button you are entering into a
contract whereby you agree to purchasing the item at the price listed.

If you want to ship your item to an alternate address please add
that address on your PayPal account and use the address as the default
or confirmed address to pay us through PayPal

With Free Same Business Day Shipping we work to get you your order Fast. 


All orders over $500 will require a signature for delivery.

All pre-selected shipping rates and methods are for customers with a
valid residential or commercial address within the Contiguous 48 United
States (PO Boxes address may require additional charges).

P.O. Boxes, APO/FPO addresses, Alaska, Hawaii, Puerto Rico, Guam,
U.S. Virgin Islands, Northern Mariana Islands, American Samoa, Canada,
and other countries may require additional shipping fees. Please contact
a member of our team for detailed shipping charges.

Shipping is available only to PayPal verified addresses. When making
payment please confirm your address has been verified with PayPal. Once
payment is made shipping address can not be changed/altered. Payments
made using an unverified PayPal address will be refunded and order will
be canceled.

We will not accept request to change shipping address once payment
has been made. Please confirm your shipping address is up-to-date and

Typical handling time for orders is 1-business day. We do our best
to ship every package with-in 1 business day of receiving a cleared
payment. In some circumstances additional time may be need, in which
case we will contact buyer.

Shipped orders that are returned by the shipping company due to an
insufficient address or an undeliverable address will be refunded less a
20% restocking fee.

If package is refused or marked undeliverable and returned
back to us by the carrier, you will need to pay the shipping cost in
full to have the package sent back to you or we can refund the money
minus the cost of shipping


If you have not received your package, but the tracking information shows that it was delivered,
please do the following within 36 hours of expected, stated delivery:


Verify the shipping address on the order is the address where you are looking for the package

Look for a notice of attempted delivery

Look around the delivery location for the package, or see if a neighbor has accepted the delivery

Be sure to double check your mailbox and other usual spots for package delivery


If you think that your package has been stolen, we will require a police report since this is now theft.
Once we have a police report on file for the stolen package, we will reship your order.