Quantum Audio
Quantum Audio delivers a diverse range of car audio products, from amplifiers and speakers to subwoofers and complete sound systems, all engineered for exceptional performance and precision. Whether you're upgrading your current audio system or building an entirely new one, Quantum Audio provides the perfect solutions to transform your in-car sound experience. Shop now with Designer Motorsports for great prices, free shipping and fast customer service support! Be sure to join our affiliate program for exclusive low prices!
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Quantum Audio QSX8CD | 8 Inch 700W 4 Ohm 2-Way Coaxial Pro Speakers (Pair)
Quantum Audio
Price: $229.98Quantum Audio QSX8CD | 8 Inch 700W 4 Ohm 2-Way Coaxial Pro Speakers (Pair) The Quantum Audio QSX8CD is a high-output 8-inch 2-way "Powersport" coaxial loudspeaker. It is a "point-source" pro-audio driver, meaning it combines a powerful mid-bass woofer...Price: $229.98 -
Quantum Audio QSX69CD | 6x9 Inch 700W 4 Ohm 2-Way Coaxial Pro Speakers (4 Pack)
Quantum Audio
Price: $459.96Quantum Audio QSX69CD | 6x9 Inch 700W 4 Ohm 2-Way Coaxial Pro Speakers (4 Pack) The Quantum Audio QSX69CD is the 6x9-inch version of the high-output "Powersport" series. It is a 2-way coaxial speaker that combines a large mid-bass driver with a pro-audio...Price: $459.96 -
Quantum Audio QSX69CD | 6x9 Inch 700W 4 Ohm 2-Way Coaxial Pro Speakers (Pair)
Quantum Audio
Price: $229.98Quantum Audio QSX69CD | 6x9 Inch 700W 4 Ohm 2-Way Coaxial Pro Speakers (Pair) The Quantum Audio QSX69CD is the 6x9-inch version of the high-output "Powersport" series. It is a 2-way coaxial speaker that combines a large mid-bass driver with a pro-audio...Price: $229.98 -
Quantum Audio QSX65CD | 6.5 Inch 500W 4 Ohm 2-Way Coaxial Pro Speakers (4 Pack)
Quantum Audio
Price: $379.96Quantum Audio QSX65CD | 6.5 Inch 500W 4 Ohm 2-Way Coaxial Pro Speakers (4 Pack) The Quantum Audio QSX65CD is a 6.5-inch 2-way high-efficiency "Powersport" coaxial loudspeaker designed for extreme volume and durability. Unlike standard car speakers, it...Price: $379.96 -
Quantum Audio QSX65CD | 6.5 Inch 500W 4 Ohm 2-Way Coaxial Pro Speakers (Pair)
Quantum Audio
Price: $189.98Quantum Audio QSX65CD | 6.5 Inch 500W 4 Ohm 2-Way Coaxial Pro Speakers (Pair) The Quantum Audio QSX65CD is a 6.5-inch 2-way high-efficiency "Powersport" coaxial loudspeaker designed for extreme volume and durability. Unlike standard car speakers, it...Price: $189.98 -
Quantum Audio QS2TW | 1 Inch 375W 4 Ohm Dome Tweeters (4 Pack)
Quantum Audio
Price: $49.98Quantum Audio QS2TW | 1 Inch 375W 4 Ohm Dome Tweeters (4 Pack) The Quantum Audio QS2TW is a 2-way high-efficiency dome tweeter system designed to add crisp high-end detail to car audio systems. It is part of Quantum's "QS" series, which focuses on...Price: $49.98 -
Quantum Audio QS1TW | 1 Inch 300W 4 Ohm Dome Tweeters (4 Pack)
Quantum Audio
Price: $33.98Quantum Audio QS1TW | 1 Inch 300W 4 Ohm Dome Tweeters (4 Pack) The Quantum Audio QS1TW is a 1-inch swivel dome tweeter designed for high-frequency precision and flexible installation. Unlike the bullet-style "Pro Audio" tweeters, this model is built for...Price: $33.98 -
Quantum Audio QS1TW | 1 Inch 350W 4 Ohm Dome Tweeters (Pair)
Quantum Audio
Price: $16.99Quantum Audio QS1TW | 1 Inch 350W 4 Ohm Dome Tweeters (Pair) The Quantum Audio QS1TW is a 1-inch swivel dome tweeter designed for high-frequency precision and flexible installation. Unlike the bullet-style "Pro Audio" tweeters, this model is built for a...Price: $16.99 -
Quantum Audio QRS69 | 6x9 Inch 200W 4 Ohm 4-Way Coaxial Speakers (4 Pack)
Quantum Audio
Price: $239.96Quantum Audio QRS69 | 6x9 Inch 200W 4 Ohm 4-Way Coaxial Speakers (4 Pack) The Quantum Audio QRS69 is a 6x9-inch 3-way coaxial speaker designed for high-output, full-range performance. It is the largest and most powerful speaker in the QRS coaxial series,...Price: $239.96 -
Quantum Audio QRS69 | 6x9 Inch 200W 4 Ohm 4-Way Coaxial Speakers (Pair)
Quantum Audio
Price: $119.98Quantum Audio QRS69 | 6x9 Inch 200W 4 Ohm 4-Way Coaxial Speakers (Pair) The Quantum Audio QRS69 is a 6x9-inch 3-way coaxial speaker designed for high-output, full-range performance. It is the largest and most powerful speaker in the QRS coaxial series,...Price: $119.98 -
Quantum Audio QRS65 | 6.5 Inch 180W 4 Ohm 3-Way Coaxial Speakers (4 Pack)
Quantum Audio
Price: $159.96Quantum Audio QRS65 | 6.5 Inch 180W 4 Ohm 3-Way Coaxial Speakers (4 Pack) The Quantum Audio QRS65 is a 6.5-inch 3-way coaxial speaker designed as a high-efficiency replacement for factory door or rear deck speakers. It is a popular "drop-in" upgrade for...Price: $159.96 -
Quantum Audio QRS65 | 6.5 Inch 180W 4 Ohm 3-Way Coaxial Speakers (Pair)
Quantum Audio
Price: $79.98Quantum Audio QRS65 | 6.5 Inch 180W 4 Ohm 3-Way Coaxial Speakers (Pair) The Quantum Audio QRS65 is a 6.5-inch 3-way coaxial speaker designed as a high-efficiency replacement for factory door or rear deck speakers. It is a popular "drop-in" upgrade for...Price: $79.98