Bose FreeSpace E-4 Business / Retail 4 Channel Music System Power Amplifier

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Item History - Pre-owned

Manufacturers Description - This information is to be used for reference only. Because the item may be pre-owned, accessories or warranties mentioned in this section may not apply to this specific item. Please check the “Included Accessories” section and photos for more details..

The Bose® FreeSpace® E-4 system is an integrated four-channel digital signal processor and 400-watt power amplifier for 70/100V business appli- cations.

Freespace system InstallerTM software, included with each unit, makes it easy to configure and service the E-4 system.

With capacity for four source inputs, including two Line In, one Mic/Line and one Page/Mic/Line, the E-4 system provides the inputs needed for most business music installations.

Its proprietary power-sharing amplifier dynamically shares 400 watts across 4 output channels ranging from as low as 1W to as high as 400W. For example, if you have a two-zone system that requires 5 watts in Zone 1 and 395 watts in Zone 2, the FreeSpace E-4 system distributes the power based on those needs.

As a single component, the E-4 provides the processing and control features required for one-to-four zone business music applications. These features include:

  • Auto Volume: Offers dynamic control of individual zone volume levels to compensate for changes in background noise level. Auto Volume requires the use of the FreeSpace E-4 System Auto Volume Mic Kit.

  • Scheduling: Allows programming of the E-4 system for automated on/ off, volume, and source changes according to time of day or day of week.

  • Opti-Voice® paging: Provides the appropriate sound level regardless of variations in speech projection.

  • Source Leveling: Automates system compensation for variations in source input levels.

  • Dynamic Equalization: Maintains tonal balance at all listening levels.

    • Music on Hold: Provides an output for simple integration into a phone system.

    • Room Equalization: Provides easy adjustment of tonal balance in each zone.

    • Limiting: Protects loudspeakers from unwanted transient power loads.

    • Signal Routing: Allows for an input source to be routed to any of the four amplifier outputs.


Functional Condition - Full Functionality - This item is in full working order with all features operational.

Functionality Notes (if any) -

Cosmetic Condition - Average - It looks to be in average cosmetic shape for an item of this type with a typical amount of cosmetic wear to a comparable item of its age and use as shown.

Cosmetic Notes (if any) -

Included Accessories - FreeSpace E-4 amplifier, Power cable