Not enough gain on RW-10

[voxr3m]

I have an earlier RW-10 sub and the gain on its line-in input is a lot less than that of a newer RW-10 I recently tried.

For instance, I can set the volume knob on the sub to max and it still won't keep up with my RB-61's. On the newer RW-10, I only have to set it 1/3 of the way and it's already matched with the speakers (measured using a mic and RTA). The line-in on the sub amp and speaker amp are both fed by the same output on my preamplifier.

Preamp line out 1 - > Speaker Amplifier

Preamp line out 2 -> Sub Line-in

Is there a way to boost the gain on the line-in input? There's no problem with the sub. If I turn the preamp volume up the sub gets loud enough but consequently the speakers play even louder.

Suggestions?

[TNRabbit]

What preamp are you using? Does it have a variable output?

[voxr3m]

It's a Rotel RC-1070. http://www.rotel.com/NA/products/ProductDetails.htm?Id=10

There are two line outputs on the back and one volume knob on the front to control them both.

[liebherr954]

I am not familiar with the Rotel models but with my Yamaha receiver I can adjust the LFE (signal?/Volume?) through the set-up menu.(-10+10)

Maybe your Rotel has the same set-up system?

[voxr3m]

It's a preamplifier, not a receiver. No fancy digital displays on this one. []

Why is it that the gain on two different subwoofers of the same model is so different? Both set up the same way. Both located in the same position.

[liebherr954]

^^^whoops sorry.