Nicer-S 18V AC/DC Adapter for Brookstone Big Blue Speaker

This is a Nicer-S 18V AC/DC replacement adapter designed to power Brookstone Big Blue Party and Big Blue Studio Bluetooth speakers model 849504 safely and reliably.

If your Brookstone Big Blue Party indoor-outdoor speaker or Big Blue Studio wireless unit stopped powering on or runs only on battery, this Nicer-S replacement charger provides a direct-fit alternative to the original power supply. It meets international input ranges and delivers a steady 18V output, and the unit is manufactured to meet CE, FCC and RoHS standards so it integrates cleanly with the speaker’s power requirements.

Will this adapter fit my Brookstone Big Blue speaker?

Yes — the adapter is built to match the Brookstone part number and the connector and voltage specification used by the 849504 series. It’s intended as a drop-in replacement for the Brookstone P/N: KSAS0451800200HU and compatible variants.

• Compatibility: Brookstone Big Blue Party / Big Blue Studio models 849504 and 849504p
• Manufacturer part compatibility: fits BROOKSTONE P/N KSAS0451800200HU
• Connector and polarity matched for direct connection

How does the power and safety of this charger compare to the original?

The adapter accepts a wide input range (100–240V, 50–60Hz) and outputs a regulated 18V, which aligns with the speaker’s requirements. Nicer-S tests units to meet or exceed the original specifications and the product carries common safety certifications to reduce risk during everyday use.

• Input: 100–240V AC, 50–60Hz for international compatibility
• Output: stable 18V DC tuned for Brookstone speakers
• Certifications: CE, FCC, RoHS indicating compliance with safety and environmental standards

What practical benefits will I notice after installing this replacement adapter?

Replacing a faulty or lost adapter restores mains power to the speaker so you can charge internal batteries and use the unit without interruption. The adapter’s consistent voltage delivery helps maintain sound performance and prevents power-related shutdowns.

• Reliable power delivery for longer listening sessions
• Quick reconnection to AC power for battery charging
• Durable build designed for frequent plug/unplug cycles

How easy is it to use and what should I check before buying?

Installation is straightforward: match the connector to your speaker’s input and plug into a standard wall outlet. Before purchase, confirm your speaker’s model number and existing adapter’s voltage rating to ensure compatibility.

• Plug-and-play replacement — no tools required
• Verify model 849504 or P/N KSAS0451800200HU on your speaker or original adapter
• Check polarity and connector size visually if uncertain

Who is this for: This replacement adapter is for owners of Brookstone Big Blue Party or Big Blue Studio wireless Bluetooth speakers (model 849504 series) who need a dependable AC/DC power supply. It’s suitable for users replacing a lost or broken adapter, for those who travel internationally (thanks to wide input voltage), or anyone seeking a certified aftermarket charger that matches OEM power specs without having to buy a whole new speaker.