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Kicker Bullfrog® BF400 Music System

Waterproof portable Bluetooth® speaker with FM tuner (Gray)

9 Reviews

Item # 206BF400GY

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Our take on the Kicker Bullfrog® BF400 Music System

When I brought the Kicker Bullfrog BF400 to my desk to check it out, a co-worker jokingly asked, “Is that your lunch bag?” “No,” I replied, dropping the 8.6-pound speaker on my desk. “It's a party waiting to happen.” And so it is. This portable Bluetooth speaker kicks out sound as brawny as its waterproof casing. And that's just for starters.

Kicker Bullfrog JUMP

Waterproof and dust-proof

The party's in the bag

When I brought the Kicker Bullfrog BF400 to my desk to check it out, a co-worker jokingly asked, “Is that your lunch bag?” “No,” I replied, dropping the 8.6-pound speaker on my desk. “It's a party waiting to happen.” And so it is. This portable Bluetooth speaker kicks out sound as brawny as its waterproof casing. And that's just for starters.

360° sound

The BF400 features two 3" full-range speakers with two3" x 4" passive radiators for enhanced bass. One speaker/radiator pair faces front, and the other faces rear, generating a 360° soundfield. The system has a nice, tight sound. And you'll hear it loud and clear when used outdoors.

Waterproof casing

The speaker's casing has an IP66 rating, meaning it's waterproof and dust-proof. While you shouldn't jump into the pool with your BF400, it will withstand the splash of your cannonball while sitting poolside. And if your BF400 gets splattered with dirt or mud, you can just hose it off.

FM radio and auxiliary input

A built-in FM tuner gives you even more listening options. The BF400 comes with a detachable FM antenna to improve reception. You can also play music from other portable devices through the JUMPs auxiliary input jack.

Kicker Connect App

Download Kicker's free control app to your Apple® or Android™ device and really take control of your BF400. With it, you can pair two Bullfrog music systems for two-channel stereo.

The app also lets you save your favorite FM stations as presets. You can even label the stations to make them easier to find. For example, instead of memorizing call letters, just label your sports station preset “sports.”

Power to spare

The speaker's built-in rechargeable battery gives you up to 20 hours of portable operation. The JUMP comes with its own USB charging cable. Just plug it into a computer or a spare AC/USB adapter to recharge. And you can keep your smartphone charged through the JUMP's USB charging port.

Product Highlights:

  • built-in Bluetooth
  • range: 100 feet
  • IP66 rated waterproof and dust-proof
  • two 3" full-range drivers and two 3" x 4" passive radiators for enhanced bass
  • Kicker Connect app
    • free download from iTunes App Store® and Google Play
    • lets you adjust EQ settings
    • remotely controls volume
    • save FM radio stations as presets with customizable names
    • lets you pair two Kicker Bullfrog music systems for two-channel stereo
  • stereo minijack input for portable devices
  • USB charging port for smartphone
  • built-in rechargeable battery lasts up to 20 hours
  • USB charging cable
  • 6"W x 10-9/16"H x 7-5/8"D
  • weight: 8.6 lbs.
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's in the Box:

  • Bluetooth portable speaker
  • AC power adapter (attached 5.5' DC cord)
  • 3 AC power plugs (US/EU/UK)
  • 48" FM wire antenna
  • Quick-Start booklet

I absolutely love being able to remotely turn it on. It has great sound, great features, and the battery life is very long.

Jay, Chugiak, AK


Kicker Bullfrog® BF400 Music System Reviews

Average Customer Review(s):

(9 Reviews)

Great product

Jay from Chugiak, AK on 3/13/2019

Crutchfield Customer Review (What's this?)

I absolutely love being able to remotely turn it on. It has great sound, great features, and the battery life is very long.



Kicker Bullfrog® BF400 Music System

Crutchfield customer from Hamilton, NJ on 6/26/2018

Crutchfield Customer Review (What's this?)

works great




Scott from Muskogee, OK on 4/22/2018

Crutchfield Customer Review (What's this?)

Great speaker! The app you download with it makes it so much better. A little on pricey side, but it's pretty loud for sure an still sounds very crisp! Not much bass, but overall a good speaker. Haven't used the radio option yet and probably won't.

Pros: Does not distort at high volume, Volume gets pretty loud

Cons: Not much bass at all.

Good sound

Jim from Missouri City, TX on 12/30/2017

Crutchfield Customer Review (What's this?)

Very loud, very clear. I'd like a little more bass out of this for this price but it's still a good buy. I like how solid it feels and it does make me leave my Bose Accoustic Wave II at home cuz it's got a battery.

Pros: Small footprint, long battery life, tremendous sound

Cons: Bass is ok, could be better. That's it.

Loud and clear

Michelle from Mililani, HI on 9/14/2017

Crutchfield Customer Review (What's this?)

Need a portable speaker for the beach/tailgating and this is perfect for the job!

Pros: Gets loud and sounds clear. Bass is decently loud for music lovers

Cons: Expensive

Kicker Bullfrog® BF400 Music System

Brian from Oahu, HI on 9/3/2017

I ordered it Wednesday night (Hawaii time) came in Saturday afternoon! Was looking for a outdoor portable speaker for the beach and tailgating. I used to while working construction too. Very loud and clear! Love the app and fm station. Needs more bass to my preference but I'm a bass head. I used it while working construction. It's really built well, not fancy looking but not bad looking either. Price is pretty up there but it's durable and loud.

Pros: Loud, clear sounding, well built

Cons: Pricey not much bass

Insanely good sound and zero issues

Rich from Oklahoma City, OK on 7/25/2017

I received one as a gift and bought a 2nd one locally. I've had zero issues pairing the two together as the previous reviewer commented on. You don't even need to use the app to pair them. Press Play & Vol+ on the unit you're playing audio out of and then press Play & Vol - on the unit you're slaving to it. Boom. That's it. Takes 3 seconds. They're louder than anything and the bluetooth range is far and away longer than any other bluetooth device I've used. The app allows for some EQ adjustment, so if you're listening to hip hop very loud and you're getting some distortion, back the bass down a notch. In terms of bass output, it's got gobs. Plenty of full rich output. I've been using mine a couple weeks now. Funny part was I fired up the old bluetooth speaker I had been using just for fun.... wow..... I used to listen to that!??! HIGHLY recommended!!!

Pros: Very long battery life, LONG bluetooth range, very solid feeling, LOUD, very hardy full sound


Pairing Unsuccessful

James from Tracy, CA on 6/11/2017

Crutchfield Customer Review (What's this?)

I purchased two Bullfrogs. They are well built and very sturdy. The instructions that came with the units were vague and virtually worthless. They may have been useful if you didn't encounter any glitches as I did. I loaded the Kicker app (on my iPhone) and was able to get the first unit to operate, pairing the second unit to the first was impossible. I have other bluetooth speakers and the pairing was straight forward and easy. I tried every thing the instructions told me to do to no avail. I then turned to Crutchfield's tech support and spent hour long sessions with them over the course of three days. Again to no avail. The two speakers kept switching from the "primary" speaker to "pairing" speaker, talk about frustration. My son who was visiting from out of state surprised me. When I returned from running errands, he had the speakers playing in the paired mode. He said he just followed the instructions. I was thrilled. However, when he turn the speakers off, closed the app and attempted to demonstrate how it all worked we discovered that he had to go through the entire pairing process again! Which is not a simple process. My other bluetooth speakers stay paired when turned off and when powered up they verbally state "party pairing successful". That simplicity is what I expected. When the speakers "worked" they sounded fine (however, at higher volume the sound would distort) and covered the 25'X50' backyard area with music. I returned them.

Pros: Well built, Very Sturdy, Good sound at moderate volume.

Cons: Pairing two speakers was impossible for me to perform. Instructions were very poorly written At higher volume sound distorts

Well rounded Bluetooth speaker

Nate from Valrico, FL on 6/8/2017

Was given this as a gift just the other day and have used it quite a lot since then to test it out. Pairing is made easy by a "pairing" button on the top of the device. The sound is rich and deep as one would expect for a device in this price range. The battery life is doing well as out of the 15+ hours I have used it I have not had to charge it. The app is easy to use if not a little bland.

Pros: Looks appealing, charge holds, buttons are ergonomic and easy to figure out.

Cons: Weight is hefty and although it has a water resistant rating I would test it if I didn't have to as the speakers are deeply set in the grills and getting any dust or debris would be difficult.


Hands-on research

Features and Specs

Weather-resistant Yes
Waterproof Yes
Speakerphone Mic No
NFC Touch Pairing No

Product Research


360 Degree Sound: The Kicker Bullfrog BF400's unique driver design gives you speakers on both sides of the unit for 360 degree sound. There is one round 3" full-range driver and one oval 3"x4" passive radiator on each side of the speaker. The two 3" full-range drivers are powered by a built-in 30-watt amplifier.

Water & Dust Resistant (IP66 Rated): Its IP66-rating means the Kicker Bullfrog BF400 offers complete protection against dust and power water spray on all sides. So you can feel confident when taking this speaker system to the pool, beach or camping. The rubber cap that covers the Power, Aux, USB, and Antenna port needs to be installed for the speaker's IP66-rating.

Note: Even though the Kicker Bullfrog BF400 is water & dust resistant, it cannot be fully immersed in water (this will cause permanent damage to the speaker).

Bluetooth Audio Streaming: The Kicker Bullfrog BF400 offers built-in Bluetooth with support for A2DP & AVRCP, so you can wirelessly stream stored music and music apps from your smartphone, tablet, laptop, or computer (including Apple, Android, Windows, and Mac) to the speaker system. You'll even be able to control basic music playback functions such as Play/Pause & Previous/Next Track from the Bullfrog BF400.

  • 100' Wireless Range: The Kicker Bullfrog BF400 system combines Bluetooth with its own proprietary wireless technology for an amazing 100' wireless Bluetooth range.
  • Multi-Device Pairing & Auto-Connect: You can pair the Bullfrog BF400 with up to 5 Bluetooth source devices, but only one can be connected at a time for playback. It will automatically reconnect with the an already paired device when it comes within range.
Note: The Bullfrog BF400 system does not support Bluetooth hands-free phone communication.

Kicker Connect App: The Kicker Connect App (for Apple iOS 8.0+ & Android OS 4.3+) lets you select from 5 EQ presets (Kicker / Outdoor / Voice / Treble / Flat), create & select FM presets, control volume, and check battery level right from your compatible smartphone or tablet.

DoubleKick Connect: Using the Kicker Connect App, you can join two Bullfrog BF400 speakers together wirelessly for twice as much sound. This feature is called "DoubleKick Connect". The wireless range between speakers is 30'.

FM Tuner: The Kicker Bullfrog BF400 is equipped with a built-in FM tuner (there is no AM tuner). You can save and select FM presets on the Kicker Connect App for Apple iOS and Android. An external FM wire antenna is included that is terminated by a male 3.5mm connector which plugs into the 3.5mm antenna port on the side of the speaker.

Aux Input: The Kicker Bullfrog BF400 features a side-panel 3.5mm Aux input for connection of practically any portable audio source with an analog output or headphone jack.

USB Charging Port: A side-panel USB (type-A) charging port will charge your connected smartphone, tablet, or portable digital audio player. The USB port is rated at 5V/2.1A.

Top-Panel Controls: The top-panel push-button controls consist of Power On/Off, Play/Pause, Previous/Next Track, Source (Bluetooth/FM/Aux), Pair, and Volume Up/Down.

AC or Battery Power: The Kicker Bullfrog BF400 can be powered by AC or its built-in battery. The Bullfrog BF400 comes with an external AC power adapter that is used to supply power to the speaker and charge the built-in battery. The rechargeable lithium-ion battery (11.1V/3350mAh) provides up to 20 hours of music playback. It takes 2.5 hours to full recharge the battery. 5 top-panel LEDs indicate battery power level.

Auto Turn-Off: If no audio signal is detected for approximately 5 minutes, the Bullfrog BF400 system will automatically turn off (only in Bluetooth or Aux mode). Auto Turn-Off is not available when using the FM tuner.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.