2.1 Channel setup discussion with photos!

Maybe could use a little advice. If the best advice is “DON’T” that’s fine.

So thinking about my office setup which is pretty darn good It’s a straight 2 channel, spanning decades of technology. To re-introduce it so you know what I’m working with, I have streaming going from an iPad on my desk via BT5, AAC to an iFi Zen Blue V2. ZEN Blue V2 by iFi audio - The Ultra-Affordable Bluetooth DAC from iFi audio the output from that goes into a Schiit Lokius Schiit Audio: Audio Products Designed and Built in California and Texas and that goes into my Sansui AU-919 integrated amp, which drives a pair of EgglestonWorks Nico Evo speakers. Here is a pic of the back of the Sansui:
Sansui AU-919 Super Fidelity DD/DC Amplifier for sale.

I don’t often play loudly, it’s an office and there are businesses nearby and an apartment above. I frequently play quietly - anything from stuff with very little bass like ancient music to chamber to world to edm which of course has plenty of bass. Even some pipe organ…

The Eggleston’s have 6 inch mid/bass woofers are ported, and are rated down to 38db, so they actually produce some real bass.

As some of you know I have been toying with adding a sub, or perhaps a pair of subs. Size is critical in the office, and the room is not huge but not small. I have been thinking about the SVS 3000 Micro sub.

I’d probably start by seeing what one could do. Since it is an office, I don’t much in the way of visible wires, and I’m thinking about using SVS’s SoundPath wireless adapters.

Note that one of the advantages of the SVS system is that it comes with an EQ app, SVS Subwoofer Control Smartphone App, which provides parametric EQ for the subs.

Now my question is how should I go about connecting subs to this system? Nothing above (why I provided links) has a subwoofer out. I suppose I could get some of those RCA connectors that split 1 into 2. Or I could perhaps use some kind of external crossover like https://www.amazon.com/dp/B07KJRYHFH/ref=as_li_tl?ie=UTF8&tag=coa_us-20

But I’m still not at all clear on IF I should use a crossover. If I do, should I put it in the path between the iFi Zen Blu and the Lokius? And if so should I set it at 36 or 40 hz and still allow the Nico’s and the amp to provide bass to the extent they can? Or would it make sense to roll off at perhaps 60 hz?

Neither the Nico’s nor the amp strain at all now - as I don’t play them loudly.

Or do I not need a crossover at all because I have the EQ app?

I would put the sending unit(s) for a sub (or subs) inside the cabinet that hides the amp, zen, and Lokius. The sub would go either under my extend desk, or in an inconspicuous spot alongside. To start, of course.

As always, I appreciate any and all thoughts, suggestions, and commentary, from actual help to “Watcha talkin’ about, Willis?”.

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