I want to clarify how bass management works with "Large" and "Small" speakers in bypass modes:

1) With a digital input (coax or optical) and the Model 990 in bypass mode with speakers set to "small" you will receive a sub signal relative to the crossover point set for these speakers. In this mode you bypass surround DSP, but not bass management.

With all settings as described above, but speakers set to "large", you get no signal to your subwoofer. The L/R + Sub settings only work when not in bypass modes (such as Stereo and Upsample).

2) Analog bypass (bypass for regular two channel analog inputs) behaves a little bit differently. With speakers set to "small" you will receive a signal to the sub. However, since you are using an analog input connection, you will bypass both surround DSP and bass management as BM occurs in the digital domain. In order to receive a signal at your sub, the L/R signal is duplicated and sent on to your sub full range. Under these configuration settings you will need to activate the crossover in your sub to aid high frequency roll off.

As noted above, if your speakers are set to "large" you will get no signal to your subwoofer. The L/R + Sub settings only work when not in bypass modes (as in Stereo and Upsample).

Scott