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.

Sorry if this is the wrong place to post, but I am hopeful to find the answer here. I posted the following on vguitarforums.com, but no one knows for certain:

c) It appears that there is no way to get the digital out of the VG-99 into the T1 or L1, is that right? Or is anyone using the USB output of the VG-99 into the USB input of the T1?? Seems unfortunate to have to go from digital to analogue to digital to analogue if the USB to USB option cannot work. If the USB to USB does not work, is there any bad latency or sound quality degradation from all the conversions?

Can anyone here give me an answer whether the USB out from the VG-99 is completely compatible and works to pass digital audio to the T1 USB input? Are there any bugs? If this is not something that works at present, can someone from Bose advise if they are working on this (or some other VG-99 preset) for the T1 to roll out in the near future?

I appreciate any input as I am researching my purchase decision. Take care. Mike
Original Post
Hi Gatormike,

The T1™ acts as a USB "Slave" or "controllee" client and requires a "Master" or "controller" host like a computer. I don't think it will accept an input via USB except from a computer that recognizes it as a USB sound card. Will your VG99 do that?

Refs: T1 and USB

Edit - terminology corrected as per troberts post below.
Originally posted by Gatormike:
...It appears that there is no way to get the digital out of the VG-99 into the T1 or L1, is that right?

Hi Mike - I work with USB on occasion at the circuit & software levels for my day job. USB is structured to have a controller (called a Master, Type A connector, usually a computer) and a multitude of controllees (called slaves, Type-B or Mini-B connector, i.e. VG-99, Bose T-1, Zoom H4, etc). The controllees cannot communicate with each other. Since both the VG-99 and T-1 are in that category they will not communicate unless one or the other makes a major hardware/software change and adds the capability to become a master.

No joy Frown
Hi troberts,

Thanks for the correction on the terms and the clarification.
Great info that I will add to the wiki.


Here is some information about latency in the L1™

Originally posted by Hilmar-at-Bose:
Welcome to our forum.

In all products (T1, L1 model II, and L1 model I) the signals go though a pre-amp (as needed) and then directly converted to digital with an A/D converter. All processing is done in the digital domain and the signals are converted back to analog before the output or the power amps. The connection between the T1 and the L1 Model II is digital. When connecting a T1 through a the Master Out to a L1 Model I, the connection is analog, i.e. the signal passes twice through and A/D and D/A. We use very high quality converters, and the effect of A/D and D/A on sound and signal quality is completely insignificant.

The latency depends a little on the exact configuration. Low latency was certainly a major design criterion for our product. It’s typically measured in 1000th of a second or milliseconds or ms for short. 1 ms is the time it takes sound to travel one foot. A delay of 1ms is equivalent to moving one foot away from the loudspeaker or instrument.

Actual latencies are ca.
Model I: 1 ms
Model II: 1 ms
T1: 2.5 ms
T1+Model II: 2.5 ms
T1+Model I: 3.5 ms

Hope that helps


Source: Latency & the L1 in the wiki.
Thank you all for the thoughtful replies. Obviously, I am sorry to hear that the USB to USB route is an apparent dead end.

The L1 does receive rave reviews on vguitarforums by some of the VG-99 users. So, the A/D/A/D/A conversion and latency appears to be a non-issue.

Thanks again.

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