MartinLogan Grotto [11/24] Sub out using multiple grotto s

Using Sub Out offers an easy way to implement multiple

Grotto’s in your audio/video system.

Note: All additional Grotto subwoofers must run as either

dedicated 2-channel (stereo) or multi-channel (LFE) sub-

woofers, but not both.

Signal Connection:

1 Connect the first Grotto to your system using one of the

five modes previously described.

2 Connect the Sub Out of the previous Grotto to either the

LFE or the Right (or Left) input of the next Grotto using a

quality RCA interconnect. Connecting to the LFE input

allows additional subwoofers to perform as dedicated

LFE channels (see figure 11). Connecting to the Right

(or Left) input allows additional subwoofers to perform

as dedicated 2-channel subwoofers (see figure 12).

3 Repeat step 2 for each additional Grotto subwoofer in the

chain using the same input for every connection.

Recommended Control Settings:

1 Adjust the control settings of the first subwoofer using

the recommended control settings from the connection

method used to connect the master Grotto with your

audio system.

2 Adjust the control settings of each additional subwoofer

using the recommended control settings from the con-

nection method used to connect the master Grotto with

your audio system.

Note: While the settings of each subwoofer should be

similar, you will probably find that each sub will need to

be tweaked for optimal performance because of its

unique room placement.

Regardless of how you use your subwoofer, experimenta-

tion can often result in better sound. Don't be afraid to try

different settings. You can always return the controls to

their previous locations.

Sub Out—Using Multiple Grotto’s

Figure 12. Signal connection for using multiple Grottos for stereo.Figure 11. Signal connection for using multiple Grottos for LFE.

Connections and Control Settings 11