connecting amps together?

After reading your post I'm kind of confused about what you're trying to do but you cannot connect two amps together (except a receiver to a subwoofer amp wthat has speaker-level inputs) and you can't connect the 519 to either cxa. The 519 doesn't have the necessary pre-outs. And what CV speakers are an upgrade from Dali's?

If you want bigger and louder then CV's are usually the ticket. But according to CV's website they have a sensetivity of 93 db (which is pretty low for CV) and the Dali's are a whopping 114! So you're going to need a really big amp to get the same sound pressure. Either way, you need a new receiver with pre-outs. Both of those speakers are way too much for that Pioneer receiver.

Actually the Dali 6 is rated at (2,83 V/1 m) 91db. 114db is the maximum rated output.

I don't know much about the vsx519v but it is rated at 110w .05 THD. BUT the distortion ratings is made at 1khz, not 20-20k. So the power and THD ratings are pretty meaningless.

I would guess that the pieces you have should be able to be driven to a pretty strong SPL.

What exactly is missing? Bass? Overall volume? Is the sound getting distorted once you get the volume where you want it?

You may want to consider a better sun and send more of the lower freq signals to the sub and free up more power for the Pioneer amps and Dali towers to handle. Move the cross over up some so the Pioneer amp and Dali's don;t have to play the low end as much.

I'll add a couple of points to consider. First, watts does not really tell you much about how much power you have. I have an accurate power measurement, you need watts X amps. I perfect example if that my Pioneer VSX32 receiver is rated at 110wpc, but I am using the pre outs to an external amp rated at 85wpc. The external amp is more powerful. It drives my speakers to louder levels and with greater control and better sound quality. I even was using the Pioneer to drive my center channel speaker and ended up moving the center to the external amp and the sound was much fuller, more life like.

Now some high end amps may be rated at only 25 watts, but deliver those watts with very high amps. Which in turn will drive the speakers to needed volume

Next is sound quality. In our never ending quest to duplicate the live performance, we look for ways to record sound and play it back in a way that will match the sound from the original as closely as possible. If you take a nice receiver, let's say a $999 model from (Yamaha/Onkyo/Denon/Pioneer/Sony) etc and match it up to $2000 worth of speakers, I would guess that even the not so well trained ear will be able to tell the difference between Diana Krall singing in a live venue and what the speakers deliver in your living room.

But in our quest, let's says we start with a SACD recording and drop the disc into your Ayre C-5xe ($5950), and send the signal to a Mark Levinson N°502 pre amplifier ($30,000), from there, you send the signals to the amplifiers and why not use the matching Mark Levinson N°53 monoblocks ($25,000 per channel, let's start with 5). Then come speakers and many would agree that the Wilson Audio Alexandria X2 would be a great choice. Two pair, from and rear would run you $135,000 per pair ($270,000 for two pair), and the matching center channel, Wilson Watch 3s ($5200) and Subwoofer called Thor's Hammer, which by the way is designed to handle the lowest note of a pipe organ, which is 16hz at full volume (rated 20-120hz +/- 0db or 10-300hz +/-3db), and will set you back $21,000 and requires another Amplifier since it is not powered.

Now that the big pieces are in place, and your wallet is $457,150 lighter, break out the Amex to cover $16,000 in cables, $15,000 for room acoustic treatments, $2500 for the electrician to upgrade the in home wiring, another $10,000 for racks, stands and other accessories and the sound will be much closer to that live concert you heard.

Entry-level receivers won't come near the performance you're looking for, regardless of what the specs say.

The pre-outs in receivers by-pass the internal amplifiers. The only power you will get is from the external amplifier. Home Theater amplifiers aren't like car stereo power boosters. They're instead of, not in addition to.

Also, amplifiers don't have subwoofer outputs (or inputs). You use the subwoofer output on the receiver. And most two channel stereos don't have subwoofer outputs. You would connect the speaker level outputs to the sub and then the sub to the Front speakers.

If you want a good two channel setup then I'd recomend a stereo pre-amp like the Emotiva USP-1 http://emotiva.com/usp1.shtm and the Emotiva XPA-2 http://emotiva.com/xpa2.shtm

Or better yet, the Parasound 2100 http://www.audioadvisor.com/prodinfo.asp?number=PAC2100 High quality stereo amps from Adcom, parasound, etc start at $$$! and go up from there.

If you're mostly looking for volume then get a decent multi channel receiver with at least Front channel pre-outs, like the Marantz 5006, or something from Onkyo, Denon, etc (or pick up something cheap on the used market) and the Emotiva XPA-2. And as Jon suggested (and thanks Jon for correcting that 114 db boo-boo ), get a better subwoofer from SVS, HSU, Elemental Designs, Lava or better yet - build your own.

If the Emotiva setup and those Dali's still aren't enough for you then you're going to have to wait until you get that building business started .

There are some manufacturers that provide a sub pre-out on the stereo receivers. I know the Harman/Kardons provide them.

Yes, the H/K stereo receivers do have subwoofer outputs but they output a full range signal, no bass management. I just feel using a multi-ch receiver in a two channel setup is a better way to go. Proper bass management, more inputs/outputs including hdmi, option of Zone 2 and Zone 3, room correction and speaker distance adjustments. Just too many advantages to using a HT receiver. If all you want is background music or lots of volume then a stereo receiver is alright (I think I just offended millions of stereo receiver users ) . But if you really want good sound then get a stereo pre-amp and a good source player. Just the rambling thoughts of yet another knucklehead on the internet (but I'm right ).