Hertz 12" UNO 1000W Peak 4 ohm SVC Car Audio Subwoofer S-300-S4 — Big Jeff Audio Dealer Platform
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  • 30 cm (12’) S 300 S4 car audio subwoofer: Powerful deep bass in any installation
  • Efficiency of 89.5 dB: Achieved with lightweight materials for cone and suspension
  • Exclusive patented V-cone® system: Ensures maximum stiffness for low undistorted frequencies
  • Optimized for reflex and sealed enclosures: Versatile installation options
  • Resonance frequency of 33 Hz: Demonstrates Hertz R&D team's commitment to quality

Hertz 12" UNO 1000W Peak 4 ohm SVC Car Audio Subwoofer S-300-S4

This Listing Includes:

(1) UNO 100W Peak 4 ohm SVC Subwoofer

The 12" S 300 S4 car audio subwoofer, Uno's latest addition, delivers powerful deep bass with meticulous design. Featuring an 89.5 dB efficiency through lightweight materials like paper for the cone and high-density foam for the suspension, it achieves high sound pressures in the car compartment. The patented V-cone system ensures maximum stiffness for low undistorted frequencies even at high volume. Optimized for reflex and sealed enclosures with a low resonance frequency of 33 Hz, it showcases Hertz R&D team's commitment to quality. The pre-assembled ABS gasket enhances aesthetics for an appealing look upon installation.

Technical Specifications:

  • Size mm (in): 300 (12)

  • Power Handling - Continuous W: 250

  • Power Handling - Peak W:  1000

  • Impedance Ohm: 4

  • No Filter Component: Uno subwoofer

  • Voice Coil mm(in):  38 (1.5)

  • Magnet size D x d x h mm (in): 134 x 45 x 34 (5.28 x 1.77 x 1.34)

  • Weight of one component kg (lb):  3 (6.61)

  • Magnet:  High density flux ferrite

  • Cone:  Painted Pressed Paper Pulp

  • Xmech mm (in): 15,1 (0.59)

Electro-acoustic Specifications:

  • D mm: 258

  • Xmax mm:  9,1

  • Re Ohm:  3,6

  • Fs Hz: 33

  • Vas I: 82,2

  • Mms g: 112

  • Cms mm/N:  0,21

  • BL T*m: 11,3

  • Qts:  0,6

  • Qes:  0,65

  • Qms:  7,8

  • Spl dB: 89,5

Payment Information


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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.

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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.

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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.