L1® Classic

This is the name now used to describe the L1 in the Bose^® Personalized Amplification System™ family of products.

Introduced in 2003, this remained in production until 2007 when the L1 Model I was introduced. Visually and audibly, almost identical, the main differences were:

L1 Classic

See PS1 Powerstand Connections for a detailed view of the following
- On the right side of the input/output panel, there are inputs for
  - All Amps In
  - Amp 1 In
  - Amp 2 In
  - Amp 3 In
- There are outputs
  - Amp 1 Out
  - Amp 2 Out
  - Amp 3 Out (used for B1 Bass Modules)
- Features above support accessing the three amplifiers separately. One application is to drive up to six B1 Bass Modules from a single PS1 Power Stand (Classic) / Model I.
Units that were shipped with the Version 2 Presets have a blue ring around the Amp 3 output (for B1 Bass Modules).

L1 Model I

Identified by orange labels and L1™ logo
Simpler output panel (dropped Amp 1 out, Amp 2 out)
RoHS compliant.


S1 Pro+	2023 - Present	S1 Pro+ (optional wireless transmitters), Remote Control and ToneMatch Presets with Bose App
L1 Pro	2020 - Present	L1 Pro8, L1 Pro16, L1 Pro32, Remote Control and ToneMatch Presets with Bose App
Sub1 Sub2	2020 - Present	Sub module for L1 Pro32
T4S	2018 - Present	4 channel ToneMatch Mixer (stereo)
T8S	2018 - Present	8 channel ToneMatch Mixer (stereo)
F1 Model 812	2015 - Present	Flexible Array Loudspeaker and Subwoofer

Classic	2003 - 2007	Rounded front. The Output Panel has Amp1 Out, Amp2 Out, Amp3 Out
B1 Bass Module	2003 - 2020	Up to two per Power Stand (above). More if using the PackLite^® power amplifier model A1. 2 x 5.25" drivers, 26.6 lb
A1 PackLite Amp	2005 - 2020	Allows bass expansion for L1 Classic L1 Model I L1 Model II (not L1 Compact not L1 Model 1S)
L1 Model I	2007 - 2012	Rounded front. The Output Panel has no outputs for Amp1, Amp2, Amp3. The Output Panel and L1 Cylindrical Radiator^® loudspeaker sections have orange L1® markers.
L1 Model II	2007 - 2020	Extending legs, two Cylindrical Radiator®s, Bass Line Out,
T1	2007 - 2018	T1 ToneMatch Audio Engine
L1 Compact	2009 - 2021	Integrated Power Stand and Bass Unit, two Extensions
L1 Model 1S	2012 - 2020	Extending legs, one Cylindrical Radiator® (Top Array), Bottom Extension
B2 Bass Module	2012 - 2020	Up to one per Power Stand (above). More if using the PackLite^® power amplifier model A1. 2 x 10" drivers 45 lb. Three position Bass Level switch.
S1 Pro	2018 - 2023	Extremely Portable PA Battery powered

Compatibility with Other Members of the L1® Family of Products

This Page Reviewed By Bose

Cylindrical Radiator®s

Cylindrical Radiator®s are not interchangeable across models

Specifically (and without exception)

The Cylindrical Radiator speaker sections of the L1 Classic, the L1 Model I and L1 Model 1S and the L1 Model II are not compatible with each other.
- The Cylindrical Radiator speaker sections of the L1 Classic can only be used with the Classic PS1 power stand (no orange markings on the input/output panel).
- The Cylindrical Radiator speaker sections of the L1 Model I (orange markings on the back of both sections) can only be used with the Model I PS1 power stand (orange markings on the input/output panel).
- The Cylindrical Radiator speaker sections of the L1 Model II can only be used with the L1 Model II power stand.
- The Cylindrical Radiator speaker sections of the L1 Model 1S can only be used with the L1 Model 1S power stand.