Velodyne Digital DrivePLUSSeries - Manual (Page 22)

Connect the Digital Drive PLUS using Dual Inputs
The Digital Drive PLUS has dual inputs; line-level RCA and speaker-level. You can use these dual inputs for dual systems and dual connections
to a single system.
Guidelines for using this feature:
• Adjust the input level from each system for proper balance.
• The line-level and speaker-level controls on the subwoofer’s back panel act as attenuators, so you can turn down the feed
from the system with the higher level.
• If NOT using dual inputs, then set both level controls on the back panel to MAX.
• The XLR inputs bypass these input level controls, but you can still adjust the speaker-level input down to match the
XLR input, if the speaker-level signal is greater than the XLR-signal level.
Dual Systems
The Digital Drive PLUS allows for connection into two audio systems at one time; one through the line-level RCA inputs and one through the
speaker-level inputs. This makes the setup easy for sharing the subwoofer with a surround system and a 2-channel music system.
Dual Connections
Some listeners find an audible benefit in simultaneously connecting a subwoofer’s line-level and speaker-level connections to the same
receiver. To easily make these simultaneous connections:
1. Connect the speaker-level connection from the receiver output to the speaker-level input on the Digital Drive PLUS .
2. Connect the LFE (or L+R) line-level signals from your receiver to the line-level input on the Digital Drive PLUS .
These dual connections aid in filling in the missing mid-bass in single systems with thin mid-bass. The single-system connection runs the
Digital Drive PLUS subwoofer off of the signal voltage applied to the satellites, but modified by the satellite impedance. This connection allows
the Digital Drive PLUS subwoofer to more naturally and seamlessly blend with your satellite speakers. If you feel your system’s mid-bass is thin
based on your listening preferences, use dual connections and evaluate if your system’s mid-bass sounds better.
Connect into a Dual System
To share the Digital Drive PLUS using its dual inputs for dual systems:
1) Connect the 2-channel music system to the subwoofer’s speaker-level inputs. Follow the connections in the Connect section.
Be sure to connect + to + and – to –.
2) Connect either the LFE signal or the line-level left and right signal from the surround system to the subwoofer’s line-level RCA input
depending on the system type and connection availability.
3) Choose which system requires the more critical alignment. Which one will you listen to more or which one requires the more precise
alignment? We refer to this as the primary system and the other as the secondary system.
4) Listen to both systems with the line-level and speaker-level controls on the back of the Digital Drive PLUS at MAX (knobs
all the way to the right).
5) Turn the subwoofer volume up so that both systems at least match the main speaker output and sound fairly balanced in level.
6) Turn down the level control (line or speaker) on the system that has too much bass compared to the main speakers when
that system is running.
7) Turn the secondary system off. Turn on and optimize the primary system using Place & Play, Self-EQ, Auto-EQ PLUS , or Manual-EQ.
See how to perform these optimization procedures in the Optimize section.
8) Turn off the primary system and turn on the secondary system. It should be close to the correct level, but you can adjust a little
more if you want. Do not change the primary system’s level control or you will have to start from Step 4 again.
Be sure to play only one system at a time. Be sure to at least turn off the preamp and power amp or receiver of the second system.
Playing both systems at the same time can result in damage to the audio components in both systems.
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Digital Drive PLUS User’s Manual CONNECT