L1 Model II

Let's talk about the L1® Portable Line Array Systems

Using proprietary Bose® technology, L1 systems combine  PA and monitors into a single, highly portable unit. The  loudspeaker can be positioned behind or to the side —and you hear what the audience hears.

Highly portable PA and monitor combined for solo performers, DJs and general-purpose use. Fixed vertical control with 180° horizontal coverage Reduced vulnerability to feedback.

Three systems to choose from (Compact, Model 1S, Model II)
Two passive bass module options (B1 or B2)
Consistent coverage and tonal balance, portability and easy setup.

I am using the T8s. We plan to use two powered speakers out front and place the L1 behind us. A T1 ToneMatch mixer is connected to the T8S via the channel 9 input on the T8S.  Channels 1-8 on the T8s are panned to the center. I am using a balanced 1/4 TRS cable from the right master output channel (mono)  to the L1 base. Tonight in practice we also connected the left XLR master output to a powered speaker (Mackie SRM-450). The volume level to the L1 was as usual and fine. However the master output volume to to the powered speaker was substantially lower than it was to the L1. The linear output meter on the T8S confirmed this. We had to turn the volume way up on the powered speaker get a usable volume level but it's not going to be loud enough for our upcoming outdoor event.  I am concerned that we won't have enough output level to push those powered speakers. What can I do to increase  the master volume level on the XLR outputs?  Shouldn't the output volume be the same for all master outputs?

Thanks for your help!

Original Post

Hi Larry 4,

It sounds like you may have the input sensitivity on the L1 Model II Power Stand set higher than the input sensitivity on the Mackie SRM-450. This would make it difficult to get similar volume from the two units.  This can happen when working with equipment from different manufacturers.

Larry 4 posted:

I am using the T8s. We plan to use two powered speakers out front and place the L1 behind us. A T1 ToneMatch mixer is connected to the T8S via the channel 9 input on the T8S.  Channels 1-8 on the T8s are panned to the center. I am using a balanced 1/4 TRS cable from the right master output channel (mono)  to the L1 base.

Tonight in practice we also connected the left XLR master output to a powered speaker (Mackie SRM-450).

On the Mackie SRM 450, what is the setting on the GAIN control?



The volume level to the L1 was as usual and fine. However the master output volume to to the powered speaker was substantially lower than it was to the L1.

The recommended setting for the L1 Model II Power Stand Analog Input Trim is 9:00 o'clock when connected to the T8S.

When you set the L1 Model II Power Stand Analog Input Trim is 9:00 o'clock you may have to turn the T8S Master volume than you have it now.



The linear output meter on the T8S confirmed this.

On the T8S are the meters at the same level for the left and right sides?





We had to turn the volume way up on the powered speaker get a usable volume level but it's not going to be loud enough for our upcoming outdoor event.  I am concerned that we won't have enough output level to push those powered speakers. What can I do to increase  the master volume level on the XLR outputs?  Shouldn't the output volume be the same for all master outputs?

Thanks for your help!

If you turn down the input sensitivity on the L1 Model II (setting at 9:00 o'clock or lower), you will be able to turn up the T8S Master Volume and get more volume from the Mackie SRM 450.

ST

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@ ST... as a matter of interest. Taking a snippet from Larry's post "However the master output volume to to the powered speaker was substantially lower than it was to the L1. The linear output meter on the T8S confirmed this." To me reads that the level meters on the T8s confirmed that the output to the Mackie was actually low and the level meters confirmed it, therefor I take it the output meters are not reading the same.

That being the case then it suggests that Bose have done things correctly and the meter readings are actually taken at the output socket. Therefor it would follow that if two different power amplifiers have different input impedance's then the output meters may read different levels.

So am I correct in saying that turning down the input gain on the L1 may be used to balance the actual sound level but it will not balance the meters?

To balance the meters you would have to use the channel pan to obtain equal output voltages into different load impedance? Or perform some impedance matching?

Thanks for the quick response guys! After double checking the pan on each channel, I discovered that I had 3 channels panned right - channels we normally don't use.  Getting those back to center took care of the balance issue. I cut back the trim level on the L1 base from 10 o'clock to 9 o'clock as recommended, and increased the master volume to about 12 o'clock. I also increased the volume on the individual channels a bit. All those together seemed to give me enough juice to the powered speakers. I seem to be able to increase the master volume to about 1 o'clock without creating noise if I need more volume. Or I may have some more room to raise the channel volumes, but I won't know till we get out there. 

Thanks again! 

Larry

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