Subwoofer for "seamless" integration with Zu Druid

Would you care to list the rest of your system, amp, source, cables?

Sure -

I've got a Wavelength Brick DAC feeding a Musical Fidelity A308 integrated, DH Labs Silver Sonic BL-1 interconnects and DH Labs T-14 speaker cable -> Zu Druid Mk.iv (non-2008).

I'm coming from Vandersteen 2Ce's so I know this system will produce the bass I'm looking for if the speakers are capable. I listen to a lot of pop/rock and electronic music where a lot of it is obviously missing without the sub 40hz. :)

Take a look at the TBI subs for sale here on the Gone.
The seller has a pair but it looks like he will split them up and just sell one.
I had these awhile back and were the finest subs that I have heard, very fast with a nice organic sound.
Good Luck, Tish
PS The reason I sold them was because I purchased full range speakers that go down to 27hz. (Sonist Concerto 4's)

You need a REL Britania series B2,or B3 you can find these used at very nice prices..it is the only way to get seemless integration with your Druids. Check it out.

I am very familiar with the Druids, having listened to them at a friends house. He bought them new, and they took many hundreds of hours to fully break in, with bass being the most noticeable during the process. His bass is so good, some have even asked, "Where's the subwoofer?"

Have you experimented with the gap between the bottom of the speaker and the floor. This definitely affects the bass response.

Also, the impedance curves of the Druid and Vandersteen are quite different. A speaker cable can work great with one speaker and not so well with another. Myself and a few other friends have experienced this with various speakers and cables.

Have you done anything with your power, dedicated lines, upgraded outlet, power conditioner?

One thing to keep in mind is that the sound of Zu speakers is extremely coherent, and that will be compromised when you add a subwoofer.

BTW, the MF A308, great amp, I have one as well.