Audiobahn ACAP7J 2 Farad Capacitor

(2 Reviews)
Brand: Audiobahn
Condition: New
This item is currently unavailable. Notify me when it's back in stock.

Though amplifiers already have internal capacitors, their size and capacity is limited to keep the amplifier more compact. External capacitors help to deliver power when the audio system places severe demands on the electrical system of the automobile. They are designed to store power to be made available to the amplifier under extreme current draw. Aluminum capacitors have very fast charge/discharge times. Carbon cell capacitors have a higher capacity in a smaller design. Audiobahn offers a traditional aluminum 2-farad capacitor with a choice of standard connection terminals or distribution blocks.

  • Brand New Audiobahn 2 Farad Car Capacitor (Chrome)
  • 2 Farad Capacity
  • 24 Volt Rated - 30 Volt Surge
  • Auto on / off Blue Four-Digit Readout
  • Blue LED Indica tor Light
  • Electronic Polarity Protection Circuit
  • Overvoltage Protection Circuit
  • Soft on / off Circuit
  • Mounting Brackets & Hardware
  • Part Number: ACAP7J
  • Product Condition: BRAND NEW
  • 1 Year Manufacturer Warranty
Written by from Alameda, California on Nov 3, 2011
Audiobahn ACAP7J is NOT a one-of-a-kind 24 Volt rated, 30 Volt surge device!

The Audiobahn ACAP7J (UPC: 651718015710) is touted as a one-of-a-kind 24 Volt rated, 30 Volt surge device, but it doesn't work at all with my 24 Volt system.Audiobahn responded to my email about this issue, after 5 calendar days (= 3 working days) later and informed me that the matter had been referred to their engineering department. But after waiting 7 more calendar days (= 5 working days) without a response, I escalated the matter to (where I purchased the product) for a quick return of the item and a refund.   I charged the capacitor, through the supplied resistor, on my 24 Volt battery, and was surprised to still see a spark-jump when I connected the positive wire (although a  spark-jump does not damage a car audio capacitor). The ACAP7J capacitor showed no signs of life at all, even when I later tested it on a 12 Volt battery. It may be possible that I was, somehow, supplied with a mislabeled 12 Volt rated, 24 Volt surge capacitor:  The internal circuit board number reads: 220419. The circuit board also contained a relay that was clearly rated @ 14VDC. The photo (as well as the Audiobahn website photo) shows a 24 volt capable 4-digit digital display on the device, but the capacitor I received is not a true 4-Digit Digital Display (19.99 volt maximum display). The outside of the capacitor clearly reads:  "2 farad ACAP7J"Also, the retail box originally had a UPC: 651718015710 printed on it, but was covered by a label with a barcode that read: B004W36NR0 (256147). The reason I am pointing this out is that, upon further scrutiny, there are numerous photos of the Audiobahn ACAP7J, throughout the internet, featuring 4-digit digital displays with a 19.99 volt maximum display. So you are advised to use caution here. On closer inspection, the internal capacitor is a standard 2 farad, 60VDC aluminum cylinder capacitor, 3" diameter x 8.5" tall(76mm diameter x 216.5mm tall), housed in a boxy-shaped 3.156" x 3.156" x 8.75" (80mm x 80mm x 222mm) chromed plastic exterior.I bench tested the 2 farad, 60VDC capacitor, by switching the Audiobahn circuit board with a typical 12 Volt rated, 24 Volt surge circuit board, and the capacitor tested just fine on a 12 volt system.But there are definitely quality control issues with this product:- Both of the aluminum "+" and "-" terminals of the internal cylinder capacitor were deformed, such that the circuit board, when screwed tight on one of the terminals, was 1/16" (1.5mm) above the other capacitor terminal. And to screw-tighten down the other terminal would have put unacceptable stress on the circuit board and damage its components. So I had to do a quick re-surface of the aluminum "+" and "-" terminals of the cylinder capacitor until they were on the same plane, before I could bench test the capacitor.- There was an insulated yellow wire, on the underside of the Audiobahn circuit board, that was completely mashed flat, between the "-" connecting surface of the circuit board, and the "-" terminal of the cylinder capacitor. But the Audiobahn circuit board still did not function when I re-routed the wire.Final Note:I have to confess that this is not the outcome I really wanted for this device. I expected to have some dialog with the Audiobahn engineering department and they could have easily gotten off the hook by simply mailing me the correct 24 Volt rated, 30 Volt surge circuit board, and I would have installed it myself  -if indeed there even is a 24 Volt rated, 30 Volt surge circuit board in existence.

Would I recommend this to a friend or family member? No
  • Poor Quality
Is this review helpful?      
Written by from Texas on Apr 7, 2012
Got it new in box and nothing had bought audiobahn in past but no more junk!!!
Would I recommend this to a friend or family member? No
Is this review helpful?      
Have a question that's not answered here? Ask our team of product experts!
This will be visible to our community
We'll use this to email you a response. We won't make this public. See our Privacy Policy