L1® Classic

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Revision as of 15:20, 3 April 2008 by ST (talk | contribs) (=== Acoustic Output: Comparing the {{Classic}} and {{Model II}} ===)
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Classic This information is applicable to the L1® Classic

L1DoubleBass.gif

The L1 Classic

"The L1™ Classic" or simply "The Classic"

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

Cliff the Inventor

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 Power Stand 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
    • Features above support accessing the three amplifiers separately. One application is to drive up to six B1 Bass Modules from a single Power Stand. See: Classic Extended Bass Package
  • 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.


Different Models

How to Tell the Difference Between L1 Models

This is how to tell which L1® unit you have.


 
2020 - Present L1 Pro8, L1 Pro16, L1 Pro32
2020 - Present Sub module for L1 Pro32
2018 - Present 4 channel ToneMatch Mixer (stereo)
2018 - Present 8 channel ToneMatch Mixer (stereo)
2018 - Present Extremely Portable PA Battery powered
2015 - Present Flexible Array Loudspeaker and Subwoofer

2003 - 2007 Classic30.pngRounded front. The Output Panel has Amp1 Out, Amp2 Out, Amp3 Out
2007 - 2012 ModelI30.pngRounded front. The Output Panel has no outputs for Amp1, Amp2, Amp3.
The Output Panel and L1 Cylindrical Radiator® loudspeaker sections have orange L1® markers.
2012 - 2020 MII32.pngExtending legs, one Cylindrical Radiator® (Top Array), Bottom Extension
2007 - 2020 MII32.pngExtending legs, two Cylindrical Radiator®s, Bass Line Out,
2003 - 2020 B1 Bass ModuleUp to two per Power Stand (above). More if using the PackLite® power amplifier model A1. 2 x 5.25" drivers, 26.6 lb
2012 - 2020 B2 Bass ModuleUp to one per Power Stand (above). More if using the PackLite® power amplifier model A1. 2 x 10" drivers 45 lb. 3 position switch.
2005 - 2020  Allows bass expansion for L1 Classic L1 Model I L1 Model II (not L1 Compact not L1 Model 1S)
2007 - 2018 T1® ToneMatch Audio EngineT1 ToneMatch Audio Engine
2009 - 2021 L1® CompactIntegrated Power Stand and Bass Unit, two Extensions



Compatibility with Other Members of the L1® Family of Products

This Page Reviewed By Bose

Cylindrical Radiator®s

Cylindrical Radiator®
Cylindrical Radiator®s are not interchangeable across models

Specifically (and without exception)

T1 ToneMatch® Audio Engine, T4S/T8S ToneMatch® Mixers

T1 This information is applicable to the T1 ToneMatch® audio engine
T4S This information is applicable to the T4S ToneMatch® mixer
T8S This information is applicable to the T8S ToneMatch® mixer

PackLite® power amplifier Model A1

A1 PackLite AmpThis information is applicable to the PackLite® A1 Power Amplifier

B1 Bass Module

B1 Bass ModuleThis information is applicable to the B1 Bass Module

B2 Bass Module

B2 Bass ModuleThis information is applicable to the B2 Bass Module

Holistic View

L1™ System Holistic View


Acoustic Output: Comparing the L1 Classic and L1 Model II

Ken-at-Bose

The Model II system plays as loud as the Classic or the Model I.

Complete Quote

Hi Folks,
Here and in a few other areas, there's been a good discussion about volume levels in the L1 classic vs the Model II.
I think there are two separate issues:
  1. How LOUD can the Model II play vs. the Classic or the Model I?
  2. If you set trim and channel volumes on the T1 similarly to the Classic, will you hear the same sound level?
As to Question 1, The Model II system plays as loud as the Classic or the Model I. Moreover, the Model II is no more or less susceptible to microphone feedback than the Classic of the Model I.
Question 2 is being answered thoroughly in other threads. My take is that the Model II and the Classic are two different products in the same family. There are some differences in how the gain staging is done. The best course in my opinion is on both units to set the trim levels and leave those alone, then use channel and master gain to bring the level to the desired amount. Again, there's no difference in the maximum sound levels.
Ken



The maximum output volume of the L1 Classic and the L1 Model I are virtually identical.

In the L1 Classic, the L1 Cylindrical Radiator® loudspeaker is powered by two (2) 250 Watt amplifiers. In the Model I, the L1 Cylindrical Radiator® loudspeaker is powered by one (1) 250 Watt amplifier. Both the Classic and the Model I use a second 250 Watt amplifier to power one or two B1 bass modules.

Although these numbers serve as a point of reference they do not tell the whole story. During the design of the L1 Model I the impedance of the L1 Cylindrical Radiator® loudspeaker was lowered. As a result of the lower impedance, a single 250W amplifier now powers the system to within 1.75 dB of the max SPL of the L1 Classic. Several other changes were made to the signal processing and acoustical sections to further reduce this small difference. Particular attention was paid to this change and many A/B comparisons were conducted by Bose to confirm that there was no significant audible difference between the two systems.