Best subwoofer for Quad 988?

Pro Musica in Chicago was using Sunfire subs with the 988s last year. No doubt an excellent combination.

Another DIY project would be a pair of 15" Adire Tumults on a largish dipole baffle.You could run Bryston 7b's on each with a TL circuit to tailor the bottom end.That would be cool.3k or so.

Larry Greenhill of Stereophile uses a Velodyne DD-18 with his quads and says the integration is seamless. I imagine a DD-15 or 12 would work in a smaller room just as well.
Curt

DD-15 Will work with any speaker.

If you do plan on a design other than your own, a couple of Vandersteen 2W will do fine.I used a pair with a pair of Spica TC-50's and the things just sang.Good luck.