pbr300x2 ?
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Road Captain
Joined: Oct 2013
Posts: 563
Likes: 4
From: Raleigh, NC
pbr300x2 ?
Are you guys that are familiar with the RF amp setting your gains by using the little dot on the gain control button or the lines that are cut into the dial button? I'm wondering because I finally got my system back together with the amp and it doesn't seem much louder than without it. The Kenwood has something like 22 watts output so I assumed it would be MUCH louder. I have the gain set at what I believe is about 6, according to the little dot on the dial that you can barely see. I guess I really need to do the "set your amp by ear" procedure. I didn't have time to do it so I just set it at what I thought would be a good gain setting, 6 and put it all back together. All polarities are connected correctly, and I'm using the 4V pre outs.
Outstanding HDF Member
Joined: Jun 2012
Posts: 2,248
Likes: 7
From: Atlanta, Georgia
Are you guys that are familiar with the RF amp setting your gains by using the little dot on the gain control button or the lines that are cut into the dial button? I'm wondering because I finally got my system back together with the amp and it doesn't seem much louder than without it. The Kenwood has something like 22 watts output so I assumed it would be MUCH louder. I have the gain set at what I believe is about 6, according to the little dot on the dial that you can barely see. I guess I really need to do the "set your amp by ear" procedure. I didn't have time to do it so I just set it at what I thought would be a good gain setting, 6 and put it all back together. All polarities are connected correctly, and I'm using the 4V pre outs.
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Road Captain
Joined: Oct 2013
Posts: 563
Likes: 4
From: Raleigh, NC
Thanks Eshaw. lol, I guess six isn't enough then. The main reason I'm asking is because I don't recall, ever, reading that anyone has had to go higher than 5-6 on the gain. Is this assumption incorrect? How high is too high for the gain?
Outstanding HDF Member
Joined: Jun 2012
Posts: 2,248
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From: Atlanta, Georgia
Well, that all depends on a lot of factors. What kind of speakers are you using? I remember going up as high as 10-11 when I was pushing the kappas with that amp and I do remember that 6 was definitely not enough.
Cruiser
Joined: Aug 2013
Posts: 120
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From: Louisville, Ky.
I run 2 PBR300X2 amps, my gain is set at 3 on both and my system rocks. I usually only turn the volume up to about 20 and you can hear it loud and clear on the highway doing 80mph and I also have loud pipes.
Outstanding HDF Member
Joined: Jun 2012
Posts: 2,248
Likes: 7
From: Atlanta, Georgia
I stand corrected about 10 or 11. I meant 7 or 8. I have changed so many amps over the past few months and easily get em all confused.
Stellar HDF Member
Joined: Apr 2008
Posts: 3,002
Likes: 86
From: Charlotte Metro
I recently got gains adjusted properly with my DVM. I’ve got 4ohms speakers so adjusted to ~20 volts AC volt scale (100watts x4 ohms=400 take sq. root 400=20vac) at 75% volume setting. Amp gain is right about 7. I' am running RCA inputs and have HU with 4 volt pre-outs. Check out the top sticky by UltraNutz to set the gain using DVM.
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Road Captain
Joined: Oct 2013
Posts: 563
Likes: 4
From: Raleigh, NC
I recently got gains adjusted properly with my DVM. Ive got 4ohms speakers so adjusted to ~20 volts AC volt scale (100watts x4 ohms=400 take sq. root 400=20vac) at 75% volume setting. Amp gain is right about 7. I' am running RCA inputs and have HU with 4 volt pre-outs. Check out the top sticky by UltraNutz to set the gain using DVM.
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Thread Starter
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Road Captain
Joined: Oct 2013
Posts: 563
Likes: 4
From: Raleigh, NC
I knew I was setting it on the low side. I just can't believe that at a setting of 6 out of 11, and it's about the same as the 22 watts I was getting straight from the HU?
Last edited by jamess71; Aug 20, 2014 at 08:59 AM.