After experiencing too much noise in my system using the Sony w/ Tune Tray, RF PBR300X4 and RF Power coaxials I decided to go back to speaker level inputs and remove the RCAs. OMG what a difference! The sound quality is so much better and now my gain is set to 1... YES 1 because it's so damn loud.

I am now hearing frequencies being played that I never heard with the RCAs.

Just like a lot of other guys on here have stated. High level (speaker) inputs are far superior on this amp. It's really not built for RCA hook-ups.

Try it and see the difference!

 

carl can you elaborate on the proper way to set the amp up? i followed your cvo speaker thread and my 300x4 will be here monday i went polk dxi650's for all 4 speakers

 

the gain is just one hair past #5 on the input gain, low/all/high switch is in the highpass setting & i adjusted the x-over too.

its load as hell before it clips but you bump the folume button one more notch & it will clip.

 

I adjusted the gain on mine using a DMM. It sounds amazing.

 

I'm not a tech or audio professional, but I've found this website very helpful for many purposes, including setting the gains on the PBR300x4:

http://www.bcae1.com/gaincon2.htm

Basically, I've set the gains at their lowest; set bass and treble flat on the HK head unit; and, increased volume to about 3/4 max. Then I've increased gain to where I hear distortion.

Also, music source seems to be an important variable since various media may be recorded at different output volume levels.

Bottom line: I believe setting amp controls is mostly art, given variabilities in speakers and music sources.

Carl

 

Hey CHILLS, I am in Roseville... What shop did you go to? I am looking for a good deal on one right now for my 07 FLHX

 

i got mine from AUDIO CITY on fair oaks blvd & don way

Audio City

7609 Fair Oaks Blvd
Carmichael, CA 95608
(916) 515-8297

 

Well I just got the 300x4 today and OMG is it awesome, I am running the sony with the tune tray and polk DXI6500 components....however I am getting the clipping, I have the gain set at 5 and the xover set on all pass. So tomorrow I am gonna set the gain a lil lower and roll with it.

 

try the hi pass & run the gain just off the bottom & that should stop the clipping.
hi pass will keep the base from coming through the speakers but still alow mids to come through.
i didnt think it would work till i tried it & mann what a difference.
im running the HK deck & the gain just off the bottom & i can crank the volum almost all the way up befor it starts to distort.

 

I will try that next if just lowering the gain dont work, I am tired of taking the front off....... I figured it was just over heating.....