Portable Bluetooth Speaker bigben interactive PARTY Mainstream 4 AU389197 — 100W, BT 5.3, TWS Dual, USB/AUX/MicroSD, Microphone input

Bigben interactive PARTY Mainstream 4 is a portable Bluetooth speaker designed to deliver powerful audio for parties, small events and outdoor gatherings. With a rated output of 100W and Bluetooth 5.3 connectivity, the unit supports stable wireless streaming and can be paired in True Wireless Stereo (TWS) mode for stereo sound. Multiple wired and removable media playback options include USB, AUX and MicroSD, and a dedicated microphone input enables announcements or karaoke use.

Advantages

The speaker combines high output power with modern wireless technology to provide clear, loud sound in open or indoor environments. Bluetooth 5.3 improves connection stability and range compared with earlier versions, while TWS dual pairing allows two compatible speakers to operate together for a wider soundstage. Convenient playback from USB sticks, MicroSD cards or an AUX line-in reduces dependence on a single source, and the microphone input expands the device’s use cases to voice, MC or vocal performance.

Suitable for

• Home and garden parties where high volume and portability are needed
• Small corporate or community events requiring microphone announcements
• Outdoor gatherings and picnics that need battery-powered audio
• Karaoke sessions or live vocal performances using the microphone input

When it may not be suitable

This speaker is intended for portable and semi-professional use; it is not a substitute for large-scale professional PA systems required at concerts or very large venues. If you need studio-grade reference monitoring or extremely flat frequency response for critical audio production, a dedicated studio monitor would be more appropriate.

Key specifications

• Output power: 100 watts (nominal)
• Wireless: Bluetooth 5.3 with TWS dual pairing support
• Wired and removable media playback: USB, AUX (3.5 mm), MicroSD card slot
• Microphone input for live voice and karaoke
• Portable design with integrated controls for playback and input selection

How to use

Power on the speaker and select Bluetooth mode to pair with a smartphone or other source device; enable Bluetooth on the source and choose the speaker from the list of available devices. To set up dual-speaker TWS, follow the pairing procedure described in the supplied quick-start guide to put both units into TWS mode. For wired playback, connect a USB storage device, insert a MicroSD card or use a 3.5 mm AUX cable and select the corresponding input via the unit controls. Plug a compatible microphone into the mic input for announcements or karaoke, adjust microphone volume and echo settings if available, and test audio levels before use.

What to consider before purchase

• Required loudness and venue size — 100W is suitable for small to medium gatherings but may be insufficient for very large outdoor events
• Battery life and portability features if you plan extended outdoor use away from mains power
• Input compatibility with your devices (Bluetooth profile support, AUX jack, USB file formats, MicroSD capacity)
• Need for stereo separation — TWS pairing can expand stereo image when two units are available

Usage recommendations

For best results place the speaker on a stable surface at or above head level and allow some distance from walls to reduce bass buildup. When using the microphone, set initial volume levels low and increase gradually to avoid feedback. Use TWS pairing for wider coverage and balance master/slave placement according to event layout.