Compatibility between speakers and sub.

I’m not sure I understand. If I have an integrated amp, does that make a difference? Are you talking about the amp and preamp within the sub? Feel free to speak to me as though I am a third grader.

After spending a pile of cash trying various subs, the SVS SB2000 Pro was finally able to fit in with my room and Klipsch Lascalas. I thought I had given up on a sub ever being able to blend in. They have an app that you can use to tailor the frequency appropriately. I'm so glad I didn't quit searching. Punchy, clean, musical, deep and rockin'. Just sayin' Try them out. five stars

Get a high pass crossover and use what ever sun you want. Matching is mostly about the crossover. I mean most speakers have totally different tweeters, mids and woofers…. The crossovers make them play nice. 

Does your integrated amplifier have R/L RCA sockets labeled Out or Output?

ATC offers the C1 which can be connected to their active speakers. ATC's Pro 12 Also connects to their speakers. They suggests using Dolby DARDT for best performance.

I bought SVS SB 3000 subs and I’m quite happy. I use the preamp out of my musical fidelity amp. Thanks everyone for your help.