Question about Car Audio & Video
Posted by Anonymous on
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
SOURCE: my ma audio hk 4000
If there is no protection light on, be sure the input is on. Some head units need to be turned on manually (factory set to OFF).
Verify the subwoofers are wired properly.
A list of your components would help to solve your problem.
If it is new, it should still be under warranty - worst case scenario output transistor(s) blown, or power supply bad.
Posted on Jan 09, 2009
SOURCE: JBL GTO 301.1ii protect mode
Check the voltage at the amp. It's possible that the voltage is either too high (above 16V) or too low (below 8.5V). Also make sure that the amp case is not grounded. If these check out OK, the most likely cause is that the amp itself is defective and requires service.
Hope this helps.
Posted on May 27, 2009
If there's no sound at all from the subs and you know they are good, there's probably no output from the amp. It's either wired incorrectly or it is defective.
If there's some sound but just not loud enough, then either the amp is not getting enough of an input signal from your head unit, or the amp settings are not adjusted properly. Adjust the crossover and gains for the best output to subs. LP filter on, crossover frequency at about 80-100Hz, and gain to maximum without distortion when head unit volume is at about 3/4 maximum.
Hope this helps.
Posted on Jul 14, 2009
Fs is a thiele-small parameter, meaning resonance. You can use these parameters to simulate the woofer's bass response in different boxes etc.
Posted on Jan 22, 2010
SOURCE: HK AVR-247 protect mode
This is an indication of an internal problem. Typically this is shorted output transistors. Expect a parts cost in the $25-$40 range for this repair.
Posted on Apr 06, 2010
Tips for a great answer:
Apr 29, 2014 | Harman Kardon HK 3490
Jul 11, 2011 | Sony STR-DE597 Receiver
Jan 23, 2011 | MA Audio HK602SX Car Audio Amplifier
Jan 10, 2011 | Harman Kardon HK 3370 Receiver
Apr 01, 2010 | Harman Kardon HK 3480 Receiver
Jan 09, 2009 | MA Audio HK4000D Car Audio Amplifier
Nov 22, 2008 | MA Audio Hard Kore HK-898 Car Audio...
Mar 09, 2008 | Audio Players & Recorders
Jul 02, 2007 | MA Audio Hard Kore HK-898 Car Audio...
42 people viewed this question
Usually answered in minutes!