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Energy Sistem Music Box BZ4+ Portable Speaker (451999)

Built-in FM radio and playback from a USB flash drive or a microSD card: it works even without a smartphone. Twelve watts in stereo, twelve hours of battery life and USB-C recharging.

  • Built-in FM radio
  • MP3 and WAV playback from a USB flash drive or microSD up to 128 GB
  • 12 W power output in stereo
  • 12 hours of battery life
  • TWS pairing of two speakers
  • 2000 mAh battery
  • USB-C recharge in around 2 h 30
  • Bluetooth range up to 20 m
Ref.: 451999
Energy Sistem Music Box BZ4+ Portable Speaker (451999) — image 1
Energy Sistem Music Box BZ4+ Portable Speaker (451999) — image 2
Energy Sistem Music Box BZ4+ Portable Speaker (451999) — image 3
Energy Sistem Music Box BZ4+ Portable Speaker (451999) — image 4
Energy Sistem Music Box BZ4+ Portable Speaker (451999) — image 5

Non-contractual photos

The visuals on this page are supplied by the manufacturer. They are frequently produced for a whole range — not for the exact model you are viewing: what you see in the photo is never a promise of what is included.

No exchange, return or cancellation will be accepted on the grounds that something seen in a photo (accessory, port, colour, keyboard layout, packaging…) is not found on the delivered product. Only the specifications written on the page are binding for the order.

What the image does not guarantee:

  • Staging : microphone stand, boom arm, pop filter, mounts and ambient speakers photographed are not included unless stated.
  • Quantity : the number of speakers or channels visible in the image does not necessarily match the set sold.
  • Cables and tips : the cables, adapters, ear tips and cases supplied are those listed in the specifications.
  • Specifications : Bluetooth, jack socket, USB, noise cancellation and battery life cannot be read from a photo.
  • Colour : one image often serves several colours, and the shade you see depends on studio lighting as much as on your screen settings; the colour sold is the one in the title and the specifications.
  • Props and accessories : the items shown around the product (cables, stands, decorative objects, content displayed on screen) are not included unless explicitly stated.
  • Packaging : boxes, labels and bundles change with the manufacturer's revisions: the packaging delivered may differ from the one in the photo.

What is binding: the product title, this page's technical specifications, the description and, when provided, the manufacturer's PDF datasheet available in the downloads.

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1/5
449,00 DHincl. VAT

Out of stock

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Product overview

Transform your musical moments with the Energy Sistem Music Box BZ4+ portable speaker. With 12 W of power, listen to your tracks in stereo with exceptional sound quality. Connect your devices easily via Bluetooth 5.0 or use TWS technology to double the power with a second speaker. With MP3 playback via USB/SD (up to 128 GB), a built-in FM tuner and 12 hours of battery life, this speaker is perfect for days full of rhythm, without interruption. Compact, capable, a must-have!

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Technical specifications

Technical specifications
BluetoothBluetooth 5.0
Output power12 W
Box contentsMusic Box BZ4+, USB Type-C cable for charging the battery, quick guide
Battery capacity2,000 mAh
Battery typeLithium polymer
IP protection ratingNo protection rating stated
Frequency response80 Hz - 18 kHz
Audio input1 input and 1 output, 3.5 mm mini-jack (headphone output)
Battery lifeUp to 12 hours
Bluetooth profilesA2DP, AVRCP, HFP, HSP
Speaker typePortable speaker
Technical specifications (continued)
Audio power11 W to 30 W
Battery runtime9 h to 15 h
Playback sources3.5 mm jack input, Playback from a USB flash drive, microSD card reader, FM radio
Speaker featuresStereo pairing of two speakers, Microphone for hands-free calls
Charging time2.5 hours
Drivers (transducers)2 x 1.5-inch full-range drivers (6 W each) and 1 passive radiator at the base (2.0 system)
Signal-to-noise ratio> 60 dB
Wireless pairing and daisy-chainingTrue Wireless Stereo (TWS): stereo pairing of two Music Box BZ4+
Local media playbackSD card and USB flash drive up to 128 GB (MP3, WAV), FM radio 87.5 - 108 MHz
Charging connectorUSB-C
Warranty1 year

Specific references

EAN8432426451999

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Under Law 09-08, you have the right to access, rectify and object to the processing of your personal data. This processing has been authorised by the CNDP under no. D-CE-389/2015. Learn more

Frequently asked questions about this product

Can the Music Box BZ4+ play without a phone?
Yes, in three ways: the built-in FM radio on 87.5 - 108 MHz, a USB flash drive or a microSD card of up to 128 GB in MP3 and WAV. The music plays even when the phone's battery is flat.
What do the 12 W of the Energy Sistem Music Box BZ4+ deliver?
Stereo sound covering 80 Hz to 18 kHz — a wide range for this size, letting both vocals and mid-range instruments come through. The speaker is designed for close listening: bedroom, office, terrace.
What are the battery life and charging time of the BZ4+?
Up to 12 hours of listening from a 2,000 mAh lithium-polymer battery, recharged in about 2 h 30 via a USB Type-C port. A full day of music, topped back up over a lunch break.
What is the Bluetooth range of this speaker?
Up to 20 metres with Class II Bluetooth 5.0. The phone can therefore stay indoors while the speaker plays on the balcony, within the limits of the walls between the two devices.
Can two Music Box BZ4+ speakers be paired?
Yes, with the True Wireless Stereo function: the two speakers sync up and split the channels between them to widen the soundstage. It is the intended way to expand the set-up without changing model.
Is the speaker new and covered by a warranty?
Yes, new equipment, with the invoice serving as the warranty document. It charges via USB Type-C: a recent phone's cable is enough to power it back up if the original goes missing.

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