Gain formula?

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Lizardking

Copper - Posts: 184

Joined: August 23, 2004

Posted: December 17, 2004 at 11:33 PM / IP Logged

All I know is I used the method and it worked for me!! My system sounds incrediable, of course I'm not using cheap components.

Lizardking

Copper - Posts: 184

Joined: August 23, 2004

Posted: December 17, 2004 at 11:35 PM / IP Logged

My specs for those wondering!!

"Eclipse Approaching Perfection"

04 Nissan Titan King Cab SE 4X4

Smoke/Graphite, Born on 11-05-2003

Options- RF With Bench, Off-Road Package, Utility Bed Package

Add On's- Nissan Bug Deflector, Nissan Splash Guards, Nissan All Season Mat's, Nissan Step Rails, Nissan Tow Hitch, Banks Monster Exhaust, Volant CAI, Garmin 2620 GPS, Astrostart 5204 Remote Start/Security, Kenwood Excelon KVT-915DVD, Kenwood Sirius Tuner, Eclipse Subs SW8122DVC 12's, Diamond Audio Components M661, Diamond Audio Coaxials M361I, Eclipse DA7232 2 Channel Sub Amp, Eclipse Amp 5422, 1.0 Farad Stinger Cap, 7inch LCD'S (Eigervision) In Headrests, Extreme Dynamat (all doors/roof/back wall)

daze

Copper - Posts: 112

Joined: December 02, 2004

Posted: December 17, 2004 at 11:41 PM / IP Logged

Wow I cant believe out of all those posts, there was no mention of an Oscilloscope !? That is the best way possible but not everyone has one off hand !

Lizardking

Copper - Posts: 184

Joined: August 23, 2004

Posted: December 17, 2004 at 11:49 PM / IP Logged

I think the issue is getting our hands on one!! lol

stevdart

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Joined: January 24, 2004

Location: Pennsylvania, United States

Posted: December 17, 2004 at 11:54 PM / IP Logged

daze, this would be a good thread, then, to describe setting gain using an oscilloscope...doncha think? Can it be done without using the RTA that haemphyst and DYohn touched on?

flynntech

Copper - Posts: 275

Joined: April 15, 2004

Location: United States

Posted: December 19, 2004 at 3:16 PM / IP Logged

The best products for you mobile electronics guys would be the handheld O-scopes. They are comming down in price and easy to use.

The Fluke color triple trace is my favorite, but at $800-$1000 I won't be purchasing that anytime soon.

I have an old school HP dual trace scope and some old school 1960's sound generator. Both of these items put together take up a bit of space, I would need a cart to use them with a car. I use these to test amps inside for now, someday I will upgrade to something more compact and modern.

haemphyst

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Joined: January 19, 2003

Location: Michigan, Bouvet Island

Posted: December 19, 2004 at 9:43 PM / IP Logged

stevdart wrote:

haemphyst wrote:

OK, I'll give in...

Now that'll be the day! lol

Sweet... I made the list...

haemphyst wrote:

...Personally, I use an oscilloscope to discover the clipping point of the headunit, set the gain of the amplifier for the LEAST efficient speaker in the system, running the amp to JUST where the driver starts to complain at the resonant frequency of that driver, then I use an RTA to set the gains on the remaining drivers in the system.

I always use an o-scope, especially for the first gain stage, which is the head-unit, then I follow the above steps to set the rest of the gains in the system...

It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

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Gain formula?

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