












🎶 Ride the waves with sound that commands attention!
The BOSS Audio ASK904B.64 is a marine-grade 4-channel amplifier and 6.5-inch full-range speaker combo delivering up to 500 Watts max power. Featuring Bluetooth streaming with remote control, USB charging, and auxiliary inputs, it offers versatile connectivity without the need for a head unit. Its IPX7 weatherproof rating ensures durability in marine environments, while the compact design allows for easy, flush mounting. Ideal for boaters and water sports enthusiasts seeking powerful, reliable audio on the go.













| ASIN | B00VFZ09TG |
| Best Sellers Rank | #21,255 in Electronics ( See Top 100 in Electronics ) #4 in Marine Amplifiers |
| Brand | BOSS Audio Systems |
| Date First Available | March 30, 2015 |
| Department | Unisex-Adult |
| Global Trade Identification Number | 00791489123020 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 10 pounds |
| Item dimensions L x W x H | 7.5 x 5.3 x 1.7 inches |
| Item model number | ASK904B.64 |
| Manufacturer | BOSS Audio Systems |
| Material | Plastic |
| Mounting Type | Flush Mount |
| Number of Channels | 4 |
| Output Power | 500 Watts |
| Package Type Name | Box |
| Product Dimensions | 7.5 x 5.3 x 1.7 inches |
| Specification Met | Ipx7 |
| UPC | 791489123020 |
| Voltage | 12 Volts |
B**S
Good Product!
After evaluating many options on the market, I bought this amplifier, read many reviews, and compare different options. I chose this one because it already had the speakers included. It is not easy to choose the right speaker for an amplifier since the amplifiers have RMS and nominal power, which changes if the speaker is 4 or 8. It is not easy to choose the right speaker, so I thought it was very good that already the amplifier will bring the speakers. Less task to acquire the whole set. I was surprised by the size of the amp. It is really small. I thought the sound would not be that good, but I was wrong. The sound surprised me! It is very good! My boat is a 21-foot bowrider type and with the engine running the old audio system just couldn't be heard, so I decided to change it for a better system, and this one works well. Pros: - The small size of the amp really makes it easy to hide it inside the boat - Bluetooth connection is extremely easy - The controls screen facilitates everything - It is a totally marine product - The speakers are easy to install and have the patterns to make the holes. - The USB connector is very good. Read MP3. - It is a very practical system and the sound is very good. Now my friends call it "the party boat" :) - the price is right. Cons - I don't have any for now.
P**T
Great small system for my Waverunner install.
When brainstorming to add a stereo to my Yamaha Waveventure PWC, I came across this system and it seemed to fit my needs and the size of where I intended to put it. I wanted a way to listen to some music when floating or beached and didn't want to permanently modify my ski. So I installed this complete system in a spare front storage compartment. I'm also adding 2 3.5" speakers into a set of spare mirror housings. The system itself is small, light, and came with everything and seems to be well made, I'll update after use for some time and see how it holds up. For the price, I don't expect it to last forever. I tested it hooked to a YB14 series battery which is smaller than the one in my ski. I didn't hook up an ammeter, but this seems to draw very little power. I ran it on the bench via Bluetooth from my phone for 3 hours. Battery still showed 12.7 volts and charger said battery was still 95% capacity after the test. Battery drain being a concern, I'm very happy with this. The included speakers sound good. Not great, but as expected or better. For my needs, quite acceptable. The controls are easy to use. Blue tooth range is great. I tried it at up to 40 ft away and it worked fine. I'm pleased so far and have no complaints. Update 7/18/2017: One year later, still going strong and works as well as the day it was installed! Update 5/10/2018 Almost 2 years later and still works as well as it did when new. And it lives a rough wet life in the front of my Waverunner. It has been moved to my 98 XL1200 which uses the same front storage tub and gets a lot of looks, listens and thumbs up for having a stereo in my ski. I also put the small Polk audio 3.5” speakers I had in the mirrors of my wave venture in the mounting plate. Still love this setup! Update: 10/25/2018 Still working like New after another season in the ski. And in the off season I use it in my shop for a stereo. Still very happy! Update: 4/12/2019 Still going............. All winter in my shop. And now back in the ski for another season on the water. Still works perfectly! Update 7/29/2019 You guessed it.........still working perfectly.
L**R
Absolutely great sound for the price.
Installed in my new 2025 Avid Rogue 20. Install was SUPER easy. I watched like 3 videos and felt like i had the jist of it. Mounted to the center console and it's pretty loud. I have a yamaha 150 and even WOT the music is easily audible. For the price, this is it. IF you're an audiophile, or looking for a better bass response, you're gonna have to add a sub and amp.
A**N
Love the sound!
I installed this system on my boat, a 23 foot center console that I use for offshore fishing. I wanted a system that I could hear clearly while the boat is underway and though I haven't had the opportunity to test it in the field yet it should work fine. It was plenty loud in the driveway. The sound was pretty good as well. The installation took a while. No fault of the system though. I had to pull new speaker-wire which was an ordeal. The system itself was pretty simple to install. The wires were labeled well and I had zero issues with connecting them. There were 2 small issues I had with the system that made me withhold that 5th star; 1 - The blue-tooth receiver had a very small lip to cover the cutout required for the flush-mount installation. The lip was about 1/16th on top and bottom and maybe 1/8th on the sides. This made the cutout process a bit too stressful. A larger tolerance would have mad it much easier. 2 - The speaker wires included in the package were not long enough, or heavy enough gauge. I am pretty sure it wasn't tinned either. which is what you need for a marine application. I bought a much heavier gauge, tinned wire to replace what came with the unit. Neither of these problems were a deal-breaker by any means. There is one other important thing to watch for if you intend to purchase this unit. I found this for $138ish on Prime and added it to my cart then clicked "save for later" a few weeks before I completed the purchase. I went back to complete the purchase and didn't check carefully when I re-added it to my cart. What I ended up purchasing was the same unit but for over $150 and not on Prime. When I contacted the vendor they simply said "Sorry you didn't check twice before you purchased." I guess I could have sent it back for a refund but I was too lazy. Just double-check your cart before finalizing. I will update the review after I have field tested the system but for now I would definitely recommend it.
D**Y
Ok... pues hoy lo instale y se escucha muy fuerte y claro, para el precio me parece muy bien, superó mis expectativas..
R**N
Se adapta a mis necesidades por completo. Llegaron en un periodo de 10 a 13 días. Para mi gusto solo quedaría que fuese PRIME. Por el resto son perfecto
A**R
Installed in 30 minutes. Sounds great
K**.
Exelente producto lo recomiendo se lo puse a una Road king y se escucha muy bien
A**T
Todo correcto, según especificaciones. El paquete ha llegado una semana antes. Falta montarlo y probarlo...
Trustpilot
5 days ago
1 month ago