Thread: Turn-on amp POP Stoppers

Originally Posted by mutilator

errrm i just use a standard switching relay...

ignition wire goes through relay to the remote of amp, and is switched by the computers +12v.. that way it dosent power up till after the sound card has started, and powers down when the ignition does.

tom.

Did you buy or make it? I am looking for one, I can build it, but I'd need to know what to go buy, and then where it goes. I really dont want to spend any more money on this carPC, the wife will kill me!

So is there any agreence (is that a word) that the 30 amp relay will work ?

if so ..which configuration ?

While im not a very technical guy 0 it looks like you guys are relaying the opus - slowing it power up, where the issue lies in the amps turning on too quick ...so I would want to slow down the amps power up until windows is up and the OS takes control of the sound card.


any help would be appraciated as tommorow is dedicated "work on the car PC" day

I am doing exactly what these pageshave listed and no pops

and a 30amp relay will work..

What they're saying is if you buy a standard auto-relay from PepBoys...etc.. it has 4 wires, Ground, +12V Constant, ACC(Switched), and +12V out..

So Ground - obvious
+12V Constant - 12V (yellow) wire from the PSU
ACC - any Switched +12V source
+12V out - to amp Remote(trigger)

done.. no pops amps dont turn on till PC initializes and turn off before PC shutsdown

Thank you ! ..I'll be doing it tommorow

I tried it, same noise.
Didn't make any sense to me anyway. The Opus turns on, puts power to the relay, which clicks on and then sends 12v to the amps remote correct. Well, there is no delay there. The Opus send 12v to the remote-on with or without the relay. The issue is: the soundard needs to be on before the Amp. Lets just say it takes 30 seconds (or so) for the pc to turn on. Then we need a 30+ second delay.
I've manually done this. Disconnected the remote wire from the amp, let the pc boot up, then reconnected the remote wire...no noise, no pop.
Furthermore: the pc needs to shut off BEFORE the amp, and I don't see how this can be solved.

The turn-on pop I think can be removed with this:http://www.davidnavone.com/pop_eliminators.html
Not the "N66", 2.5 seconds is not long enough. We'd need the "N66A", "The delay time of the N-66A is adjustable between 0 seconds and 30 seconds".

Anyone agree?

Originally Posted by kdunn926

Well look at it like this. Your Opus ( I dont know Opus im using round figures) will put out a maximum of about 25 amps. A 400watt 12v amp will pull 33.3 amps (amps*volts=watts). This means when you pull that 33.3 amps through your poor Opus, you will immediately fry and or force it into protect mode, simple because it cannot provide that amount of wattage. I understand, based on your amount of posts, that you did not intend this however I am also answering to a similar post I saw earlier in the thread.

as far as i know and have seen in many amp manuals the Amp remote only draws from 350 - 750 milliamps ???

This thread hasn't been active in a while. Think I'll change that.

I've literally been looking into this issue for a few hours now and have not made a lot of progress. My situation is similar to Gene's except that I need a longer delay. As a Soundblaster Extigy user, I need to delay the amps turning on until Windows has initialized the soundcard (basically after startup). This is not simply a matter of waiting two seconds until power has been applied to the Extigy. When Windows initliazes the Extigy it causes the amps to pop. So basically I'm looking for something with more than a 30 second delay which puts David Navone's N-66A out.

Here's my some of my research:
http://www.mp3car.com/vbulletin/show...53&postcount=9
This makes use of a relay using a capacitor and resistor. In essence, this is what I'm looking for but it means playing with capacitors in order to get the correct time delay.

This brings me to the ELK-960 Delay Timer $22.99

Product Manual

Code:

* Trigger signal closes contacts for preset 
duration (1 sec to 60 min) then opens 
* SPDT relay rated @ 7A, 30VDC 
* Trigger voltage 4.5-27VDC 1.2mA 
* 12VDC or 24VDC setting 

Convert a momentary or continuous trigger signal 
into a timed output with the Delay Timer/Relay. 
Use the Delay Timer/Relay with standard PIR motion 
detectors to control lighting. Use with X10 Universal 
Module trigger inputs to control watering systems. 

The Delay Timer/Relay's timed off provides a fail safe 
off. It can also be effectively used as a door strike hold 
timer. The Delay Timer/Relay's pulse setting converts a 
continuous trigger signal into a pulsating ON/OFF signal. 
Ideal for flashing lights.

It's also adjustable from 1 second to 60 minutes. Should be plenty of time.

Here is an excerpt from the manual:

Ignore the 110v Power Strip and replace the 12V Power Supply with a 12VDC connection in the car (ie. battery). This device is designed for use in the home. With that said, by looking at the diagram this device effectively breaks the circuit going to the speaker while the delay is active. However, I need it to operate the REMOTE on the amp.

When the delay is complete a connection is made between the CONT and N/O ports. This is, I'm assuming, the equivalent to pins 30 & 86 on a relay as per this diagram from the12volt.com:


So if I am thinking of all this properly, in order for this connection to work, I would run the wire from the REMOTE on the amp to the CONN on this device and a jumper wire from the N/O to 12V+. This way when the delay is finished the connection is made supplying 12VDC+ to the REMOTE and turning on the amps.

Comments, suggestions, issues... Gimme some input on this idea because my brain is now hurting...

Derek