Seems tough to ensure only subwoofer is playing bass frequencies (& not the main speakers)


Given that the bass from main speakers will be qualitatively different than the bass from a subwoofer...  I do not want  them both playing the bass frequencies. Seeking help in this quest of mine to ensure only the sub plays the bass. 

**My Setup:**
- Source: Oppo UDP 205
- DAC : Black Ice Audio  Glass FX  (fyi: it has volume control)
- Integrated amp: Primaluna Dialogue Premium HP.  (no pre-outs, but has high level mono out and also HT bypass mode)
- Subwoofer: Velodyne DD+ 10 inch.  

Without the DAC in the picture, its pretty easy. The Oppo has bass management & dedicated sub output. This allows using the oppo for master volume control.

How can I use an external DAC (instead of whats built into the oppo) for both the  and continue to send bass frequencies to the sub but not the main speakers ? 

one thought i have is.. it will need introducing an external digital cross over as follows :

Oppo -> DAC -> Cross over -> Subwoofer & Integrated amp

In which case i suppose I would have to use the volume control on the DAC ?
roxito
Actually you do want the mains playing bass. The easiest and best way to get really good bass is with a lot of drivers in a lot of different locations. Do a search for distributed bass array, DBA, or swarm subwoofer system. The two main speakers help contribute to that. What you really want is like this, five subs and two mains with great bass response. https://systems.audiogon.com/systems/8367 The last thing you would want to do is remove the bass from the mains and have just one sub try and do it all. Seriously. Hard to think of a worse idea. Leave your speakers full range, get a couple more subs. You will not believe how much better that will be.
I would not mind using multiple subs of the same type for that purpose.

In this case, the passive woofers from the ported main speakers produce qualitatively different bass than the high powered sealed subwoofer.  I'd prefer to let 1 or more subs deal with bass... and let the mains deal with the rest.
Have you tried using an RCA cable between the integrated’s single subwoofer output to the Plus’ RCA (Right) LFE Input and using the Plus’ Line level control to adjust the subwoofers volume? Or to the RCA (Left) Input?

I use L/R XLR preamplifier outputs to a DD Plus which is connected to a second Plus using the RS 232 terminal.


The integrated’s subwoofer/mono output is actually a speaker level output. The RCA (right/left) LFE input on the subwoofer is a line level input. Don’t think its possible to hook them up (if I understand you correctly). My integrated does not have pre-outs. Using pre-outs wont help as the full range signal still goes to the main speakers.