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

**URL:** https://aio.lv/en/product--bigben-interactive-au389197--12388930
**Data updated:** 2026-04-26 21:01 (EEST)
**Category:** Portable Speakers
**Manufacturer:** bigben interactive
**Manufacturer code:** AU389197
**EAN:** 3499550389180
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 72.99 €
**Prices and availability valid until:** 2026-08-24 23:59
**Price without VAT (21%):** 60.32 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--bigben-interactive-au389197--12388930

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 24.08.2026 | free |
| Pickup points | 27.08.2026 | 1.79 EUR |
| Courier delivery to door | 27.08.2026 | 4.99 EUR |

## Summary description

Bigben interactive PARTY Mainstream 4 (AU389197) is a portable Bluetooth speaker delivering 100W output with Bluetooth 5.3 connectivity. It supports TWS dual pairing, playback via USB, AUX and MicroSD, and includes a microphone input for announcements or karaoke. Suited for parties, small events and outdoor gatherings where powerful portable audio and multiple input options are needed.

## Long description

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.

## FAQ

### How much does the bigben interactive PARTY Mainstream 4 Bluetooth Speaker cost, and is it available for purchase?

The price is 72.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 24.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All bigben interactive products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized bigben interactive service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty