Monoprice 115863 Deep Blue Sub75 Waterproof Bluetooth Speaker — main product image

Monoprice 115863 Deep Blue Sub75 Waterproof Bluetooth Speaker

Monoprice

Monoprice 115863 Deep Blue Sub75 Waterproof Bluetooth Speaker

Name: Monoprice 115863 Deep Blue Sub75 Waterproof Bluetooth Speaker
Brand: Monoprice
SKU: 115863

★★★★★2.7 (4 reviews)

A rugged, IPX7 waterproof Bluetooth speaker with deep bass and a carabiner clip for outdoor adventures.

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Overview

The Monoprice Deep Blue Sub75 is a compact, portable Bluetooth speaker built for environments where water, dust, and rough handling are part of the equation. Its IPX7 waterproof rating means it can survive full submersion in up to 3 feet of water for 30 minutes — well beyond splash resistance — making it a practical choice for pool days, beach trips, kayaking, and shower listening. The included carabiner clip adds a convenient attachment point, letting you hook the speaker onto a backpack, bike, or belt loop without needing a separate case or mount.

Audio performance centers on a built-in passive radiator, a secondary diaphragm that reinforces low-frequency output without requiring an additional powered driver. The result is a bass response that sounds fuller and deeper than the speaker's small footprint might suggest, complemented by clear highs for balanced sound across music genres. Bluetooth connectivity pairs the Sub75 with smartphones, tablets, and laptops, keeping the setup wireless and simple. For an affordable, go-anywhere speaker that doesn't shy away from water, the Sub75 covers the essentials.

Key Features

The Deep Blue Sub75 features an IPx7 protection rating, which means that it can be submersed in up to 3 feet of water for up to 30 minutes

The passive radiator enhances the bass response, so you can enjoy music with deep, rich bass and sweet, accurate highs.

We include an aluminum carabiner, which allows you to quickly and easily attach it to your gear.

The Bluetooth radio allows you to wirelessly connect to a variety of mobile and portable devices

Specifications

Brand

Monoprice

Model

115863 (Deep Blue Sub75)

Waterproof Rating

IPX7 (submersible to 3 feet for 30 minutes)

Connectivity

Bluetooth

Bass Enhancement

Built-in passive radiator

Attachment

Included carabiner clip

Pros & Cons

👍 Pros

IPX7 waterproof rating allows submersion in up to 3 feet of water for 30 minutes
Built-in passive radiator delivers deeper bass than typical speakers of this size
Included carabiner clip makes it easy to attach to bags, belts, or gear for on-the-go listening
Compact and portable design suits outdoor activities, poolside use, and travel

👎 Cons

Compact size limits maximum volume output compared to larger portable speakers
No specific battery life information provided, making runtime expectations unclear
Passive radiator bass enhancement may not satisfy listeners who prefer powerful, room-filling low end
Limited to Bluetooth connectivity with no aux-in cable option mentioned

Frequently Asked Questions

How waterproof is the Deep Blue Sub75?

It carries an IPX7 rating, meaning it can be fully submerged in up to 3 feet of water for 30 minutes — making it safe around pools, at the beach, or in the rain.

How does the speaker produce deep bass at its size?

The Sub75 uses a built-in passive radiator that amplifies low-frequency output, delivering fuller bass than a single driver alone could produce in a compact enclosure.

Does the speaker come with a way to attach it to a bag or gear?

Yes, it includes a carabiner clip so you can hook it onto a backpack, belt loop, bike handlebar, or other gear for hands-free portability.

Can I use this speaker in the shower?

With its IPX7 waterproof rating, the Sub75 can handle direct water exposure, making it suitable for use in the shower as long as it is not submerged beyond its rated depth and duration.

Does it connect via Bluetooth to any device?

The Sub75 connects via Bluetooth, making it compatible with smartphones, tablets, laptops, and other Bluetooth-enabled audio sources.