Line Driver

Post by **AVICJR** » Fri Sep 07, 2007 5:25 pm

I added a LD in my install this evening. I followed the manual of tuning the LD and turned down the amp gains to minimum. Is it normal to turn the gain on the LD a hair--no exageration-- on my fronts and be set? The LD gain to my sub amp was turned up about 3/4, but turning the fronts up just a hair was ridiculously loud.

I have 0 gain on either amp now.

Post by **Wakeup** » Fri Sep 07, 2007 5:56 pm

Probably much louder due to the fact that most of PG's line drivers provide 8volt output rather than some decks that only put out 2volt on a cheap deck to as much as 4.5 on most standard and above decks. Some decks put out more...but not alot more.

And believe me that couple extra volts adds alot of power.

Post by **Bfowler** » Fri Sep 07, 2007 6:03 pm

yeah, thats completly fine.

your fronts will be a much more effiance speaker.

also, if you have a non fader gain on your deck for your sub, you will have to turn that up to get full output voltage to your LD.

Post by **AVICJR** » Fri Sep 07, 2007 6:21 pm

My HU has 5 volt pre-out. I was just shocked that I didn't need to turn the gain on the LD up much if any. However on the sub amp I turned it way up which is how I had the gain on the amp anyway.

Another thing I've noticed is that even with the sub out level turned all the way down it now bleeds through to the sub, whereas before it did not.

Fowler= "effiance" What???

Post by **mr tibbs** » Fri Sep 07, 2007 6:37 pm

effiance= efficient in Fowler language.

And Mando, I thought with the SLD44 you could turn the voltage up and down for each channel, why not match them?

Post by **AVICJR** » Fri Sep 07, 2007 6:40 pm

I have the right and left matched to my fronts and the subwoofer out right and left are also equal to each other.

HoseHead · Post by **HoseHead** » Fri Sep 07, 2007 6:43 pm

I think he me meant "efficient". He missed that day in English class.

The fronts will use much less power to produce comparable sound than a sub. A sub needs horsepower to make it work.

I use an AC Four1.i LD/EQ and my mid/tweet amps are at about 40% gain. My sub amp is at about 75% gain. However, I do have a few processors in between (EPiCentre, ESP2 and a 406A). Inputs and outputs on these devices are generally in the 50% range.

Post by **AVICJR** » Fri Sep 07, 2007 6:47 pm

HoseHead wrote:I use an AC Four1.i LD/EQ and my mid/tweet amps are at about 40% gain. My sub amp is at about 75% gain.

The 40% and 75% you're referring to is the gain on the LD not the amp, correct?

Post by **mr tibbs** » Fri Sep 07, 2007 7:12 pm

That's kinda what I was talking about. Set the gains on the amp the same and crank the gain on the SLD44 for the sub channels. I guess it doesn't matter either way, as long as they are getting the voltage they need.

HoseHead · Post by **HoseHead** » Fri Sep 07, 2007 7:16 pm

Mando - Yes, amp gains. With the AC LD in the system, I had to re-adjust levels on all my components from the HU on back. The higher voltage from the LD provides a much cleaner signal.