Different Models
Different Models
T1 ToneMatch Audio EngineL1 Model IIL1 Model IL1 Classic Most of the articles are applicable for the entire Bose® Personalized Amplification System™ family of products. Where information is applicable to specific technologies there will be marker like the ones shown to the right.
How to Tell
| L1 Classic | 2003 - 2007 |  Rounded front. Output panel has Amp1 Out, Amp2 Out, Amp3 Out |
| L1 Model I | 2007 - | Rounded front, Output panel has Orange markings, L1 logo. |
| L1 Model II | 2007 - |  Extending legs |
| T1 ToneMatch Audio Engine | 2007 - |  ToneMatch™ audio engine |