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All products

  • Amplifiers
  • Subwoofers
  • Tweeters
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Featured Newest Arrivals Name (A-Z) Price - Low to High Price - High to Low
QF 2.5K Mono 2500w rms High SPL Amplifier

QF 2.5K Mono 2500w rms High SPL Amplifier

QF 2.5K Mono 2500w rms High SPL Amplifier - Class D
$ 700.00
QF4 15" 3500w rms D2 Subwoofer Custom Built

QF4 15" 3500w rms D2 Subwoofer

QF4 15" 3500w rms D2 Subwoofer

Custom Built "Products will begin upon receipt of payment". No refunds for this product once payment is made.
$ 975.00
QF NT1 100w rms 4Ω Pro Series Tweeter - Pair

QF NT1 100w rms 4Ω Pro Series Tweeter - Pair

QF NT1 100w rms 4Ω Pro Series Tweeter - Pair

Tweeter size: 3" x 1.5"
Weight: 0.882 lbs
Impedance: 4Ω
Frequency Response: 1KHz ~ 25KHz
Sensitivity: 105dB
Power: 100w rms / 240w max
Material: Aluminum
Voice coil: 1"
$ 100.00
QF4 15" 3500w rms D1 Subwoofer

QF4 15" 3500w rms D1 Subwoofer

QF4 15" 3500w rms D1 Subwoofer
$ 875.00
QF4 12" 3500w rms D1 Subwoofer Custom Built

QF4 12" 3500w rms D1 Subwoofer

QF4 12" 3500w rms D1 Subwoofer

Custom Built "Products will begin upon receipt of payment". No refunds for this product once payment is made.
$ 795.00
QFSM 10" 600w rms D4 Shallow Mount Subwoofer

QFSM 10" 600w rms D4 Shallow Mount Subwoofer

$ 250.00
QF ST100 100w rms 4Ω Pro Series Tweeter

QF ST100 100w rms 4Ω Pro Series Tweeter

QF ST100 100w rms 4Ω Pro Series Tweeter

Tweeter size: 4.875" x 2.5"
Weight: 4.25 lbs
Impedance: 4Ω
Frequency Response: 1KHz ~ 23KHz
Sensitivity: 106dB
Power: 100w rms / 240w max
Material: Aluminum
Voice coil: 1.7"
$ 80.00
QF 1600.4 1600w rms 4 Channel Full Bridge Amplifier QF 1600.4.webp

QF 1600.4 1600w rms 4 Channel Full Bridge Amplifier

QF 1600.4 1600w rms 4 Channel Full Bridge Amplifier

274w x 4 @ 4Ω Stereo
400w x 4 @ 2Ω Stereo
800w x 2 @ 4Ω Bridge
Frequency Response - 10Hz -2KHz (-3dB)
Input Impedance 56K Ω
Input Sensitivity 5v max
S/N Ratio 100dB
Minimum Supply Voltage 9v DC
Maximum Supply Voltage 15.5v DC
Working Voltage 10.5 ~ 15.5v
$ 220.00
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Designed for car enthusiasts

We are a team of audio enthusiasts dedicated to enhancing your driving experience with top-notch car audio equipment and services. Our products are tailored for car owners looking to elevate their sound quality and overall enjoyment.

Get in touch

Quadfathers LLC
87-621 Hakimo Road 
Waianae, Hi 96792 
United States

  • +1 808-364-5538
  • waiolani@quadfathers.org
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