New/Old problem...looking for help.

[Pure-Evil]

I haven't been on this forum for a very very long time...but I wanted to stop by and say hello and present a new problem.

I am still using my Onkyo TX-NR1007 receiver as a pre/pro. I don't want to replace it since it's still working perfectly, however, I recently purchased a Crown XLS 1500 pro ampa which apparently requires 1.4v input. Well....I'm just NOT getting much out of this amp and as I understand it, as was a previous complaint I had about this receiver with my Emotiva UPA7 and my subwoofers, is that I'm not getting enough voltage output from the pre-outs.

So...with that said, what's the solution here? is there such a thing as a product that will take the low voltage output from the pre/pro area and increase it? It was suggested to get a minidsp unit but I have no idea about how to use it, and, that being said is there something like that which I could use to increase ALL my pre/pro outputs to a higher voltage?

I hope this all makes sense. I'm quite disappointed with this, and I guess it's been a problem since I bought the Onkyo and started using it as a pre/pro. I first noticed the issue with my subwoofers when all of a sudden they were MUCH less powerful than when I had an older Pioneer receiver. Now....I'm running into this issue again.

If there isn't a solution, what receiver is on the market that has at least 1.4v outputs from it's pre-outs? If I have to buy a new receiver, I at least want to make sure I get the right one for my applications. I'd really like to switch over to all pro amps Crown XLS 1502's etc.