DD-12 question.

[Hallett]

Hello guys what would be the best way to connect a DD-12 sub to
a bryston sp-2 only using two channel. just wonderin if any one
has done this. thanks for your help

[Burke Strickland]

Both the Bryston SP2 and the Velodyne DD-12 are excellent equipment choices. I have been using a Bryston SP2 which I connected to a Velodyne SMS-1 via the “subwoofer out” on the back panel of the SP2. The SMS-1 was then connected to a Velodyne FSR-18. The combination of the SMS-1 and the FSR-18 approximates the operation of a Velodyne DD-18.

Two questions:

1) Are you using 2 channel analog/digital or 2 channel bypass? In 2 channel bypass mode, nothing but the front left and right channels are “active”, so you would not be getting anything from the subwoofer in that mode.

2) Are your front speakers set to “large” or “small” ? If they set to “small”, all bass will go to the subwoofer (except when in bypass mode of course); if they are set to “large”, the subwoofer will be inactive in stereo unless you use the Xbass mode as explained below.

Per page 11 of the SP2 owners manual:

With any 2-channel material, there is no LFE (Low Frequency Effects, .1 channel) track. So, if your front speakers are defined as ‘Large’, the subwoof¬er will be inactive because no bass is being direct¬ed there. The Xbass mode allows the subwoofer to be active, even if the front speakers are full-range. You may find this is particularly useful for Pro Logic movie soundtracks.
In the Speaker Setup Menu, under the SUB head¬ing, there are 3 choices:
1: None: no subwoofer attached to the system.
2: Yes - Xbass Off: subwoofer is active, but only active with LFE tracks if the front speakers are full-range
3: Yes - Xbass On: subwoofer is active in system, in addition to full-range speakers.

So to use your subwoofer for two channel stereo use in digital or analog (non-bypass) modes, you have two choices. Either identify your front speakers as “small”, in which case all bass will go to the subwoofer, or engage the Xbass mode.

Enjoy!

Burke

[Hallett]

Thanks Burke for the info i'm kinda green to this stuff witch way are yours conected trying to get the best setup. thanks again for your for your help
Hallett.