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Audio Control SPIKE Series 8" 350W RMS 4-Ohm SVC Subwoofer OPEN BOX

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Original price $199.99
Original price $199.99 - Original price $199.99
Original price $199.99
Current price $169.99
$169.99 - $169.99
Current price $169.99

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  • Unmatched Power: With 350 watts RMS, this subwoofer ensures consistent, high-quality sound reproduction.
  • 4-Ohm SVC Configuration: Offers compatibility with a wide range of amplifiers for versatile installation options.
  • Compact Design: The 8" size allows for easy integration into small spaces without sacrificing performance.
  • Precision Engineering: Crafted with premium materials to provide longevity and reliability.
  • Dynamic Performance: Experience tight, punchy bass that brings your music and movies to life.

Audio Control SPIKE Series 8" 350W RMS 4-Ohm SVC Subwoofer OPEN BOX

**Please reference pictures

No Original Box

In Working Condition

Speaker Grill is slightly bent in

Small surface scratches and scuffs from previous installation, works as normal

These woofers were previously installed in an enclosure, but were removed from the speaker box

Open-box items are NOT subject to returns. They are sold "AS IS". All requests for returns will not be accepted.**

This Listing Includes:

  • (1) AC-SPK-8S4 Subwoofer


Introducing the Audio Control SPIKE Series 8" Subwoofer – a powerhouse in a compact form, engineered to transform your audio experience. Delivering a robust 350 watts RMS, this 4-ohm single voice coil (SVC) subwoofer combines cutting-edge technology with exceptional craftsmanship to produce deep, powerful bass that hits hard and resonates with clarity.

The SPIKE Series subwoofer is designed for enthusiasts who demand high performance without compromising on space. Its 8-inch size makes it perfect for a variety of installations, fitting seamlessly into tight spots while still delivering an impressive sonic punch. With a sleek, durable construction, this subwoofer not only sounds phenomenal but also looks great in any setup.

Whether you’re upgrading your car audio system or enhancing your home theater, the Audio Control SPIKE Series 8" Subwoofer is the ultimate choice for those who crave powerful bass and exceptional sound quality. Elevate your listening experience with this compact yet mighty subwoofer, and feel the difference in every beat.


  • High Excursion Design for Ultra Low Bass

  • Fiber Matrix Paper Cone with Mica Coating

  • 3-Layer High Temp Voice Coil Former

  • Dual Damping System for Linear Bass Reproduction

  • Dual Dust Cap System for Enclosure Compression Control

  • Efficient Heavy-Duty Motor Design

  • Removable Subwoofer Grille Included

Thiele/Small Parameters:

  • Nominal Impedance (Z): 4 ohms

  • DC Resistance (Re): 3.2 ohms

  • Resonance Frequency (Fs): 60.3665 Hz

  • Piston Area (Sd): 0.0194 m2

  • Force Factor (BL): 11.3310 T.m

  • Mechanical Q Factor (Qms): 5.4933

  • Electrical Q Factor (Qes): 0.8733

  • Total Q Factor (Qts): 0.7535

  • Sensitivity 1W/M (SPL): 81.9876

  • Mechanical Comp (Cms): 0.0752 mm/N

  • Moving Mass (Mms): 92.3784 g

  • Linear Excursion (Xmax): 8.5 mm

  • Volume Acoustic Comp (Vas): 3.9378 Ltr/ 0.1390 Cu ft

  • Reference Efficiency (NO.): 0.0952%

  • RMS Power (Pe): 350 Watts

  • Peak Power: 500 Watts

  • Frequency Response: 30-500 Hz

  • Voice Coil Diameter: 2.0 in/50.8 mm

  • Displacement: 0.05 cu ft/ 1.44Ltr


  • Cut Out Diameter: 7.25"/ 184 mm

  • Mounting Depth: 4.291" / 109 mm

  • Mounting Height (w/o Grille):  0.55" / 14mm

  • Mounting Height (w/ Grille):  1.18" / 30mm

  • Motor Diameter (w/ Cover):  5.55" / 141mm

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.

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