Help with LOC gain

[dragonballz]

I have a 2006 Civic with the stock headunit. I hooked up a Tsunami LOC to my rear speakers. I am setting the gain by hooking up the RCAs to the LOC and taking voltage readings from the other end of the RCAs. The voltage goes from 0 to .4xx volts. Four-tenths of a volt with the knobs maxed out. Isnt it supposed to go higher than that... like around 4 volts? I played a 70hz test tone at 30/40 volume (75%).

The RCAs are going to my amp to power a 400w RMS subwoofer.

Even though the pre-out voltage is less than a volt, the speaker-out on the amp is able to reach the correct voltage while setting the amp gain using DMM method. The subwoofer sounds fine too.

This LOC has been installed 3 years ago and I am re-installing it after going back to my stock headunit after removing my Alpine headunit. I dont recall the voltage not being able to reach 2 or 3 volts.

Why is it so low?

Thanks

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[dragonballz]

Please?

 

[Varinabassing 10+ year member]

i say set it at max and then set the gains on the amp if it is higher it was reflect on the amp and you wont have to turn the gain up to high

 

[dragonballz]

Thanks for the reply.

Wouldnt there be a chance that I could clip the signal by setting the LOC to max? I dont have access to an oscilloscope.