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VoiceBooster MR-AK38 (Aker) 25watt Voice Amplifier with Built-in MP3 player & FM Radio

2.65 LBS
Calculated at checkout

Product Description

Yes, you hears it right, 25 watts! This unit comes with a built in FM Radio as well as a SD Card and USB port for playing MP3 files. The battery lasts 12-16 hours before needing a charge.

  • Model: VoiceBooster MR-AK38 (Aker)
  • Color: Black
  • Peak Power output: 25 Watts
  • Frequency response: 100hz ± 13db1khz ± 1db
  • Dimensions: 3.74” Diameter x 5.79” Length (95mm x147mm)
  • Weight: 1.72 lbs (780 g)
  • Voltage : 7.5v
  • Current consumption: 150mA
  • Speaker Sensitivity: 53 dBV/A +- 3 dB
  • Power Source: Built-in Lithium Rechargeable batteries
  • Battery Life: 12-16 hours, 6 hour recharge, 2-3 year life (replacements available)
  • Also included: Headset microphone, Charger cable (US plug), MP3 cable (male to male 3.5mm), MP3 line in port, Microphone line in port, adjustable waist band, Carry bag.
  • Possible Uses: Costumes, Props, Electronic sound effects, MP3 player, Teachers, Professors, Ministers, Coaches, Tour guides, and Presentations


  • Built in FM Radio
  • SD Card Port and USB port for playing MP3 music and sound files
  • Rechargeable lithium batteries that last 12-16 hours of continuous use before needing a charge.
  • Battery life will last 2-3 years.
  • Sound covers over 8,000 square feet.
  • Small and portable.
  • Comes with adjustable carry strap.
  • Body can be extended to aid in projecting volume.
  • Can also be used MP3 speaker from an external MP3 player. The amp has a microphone input and a MP3 input. The amp will accept signals from both input ports and out through the speaker at the same time.
  • LCD screen for playback indication.

Operation Manual

Warranty Information

6 Months Parts and Labor Warranty

Other Details

UPC code:
Peak Output Power (watts):
Distance heard:
6500 sqft
Height (inch):
Height (mm):
Length (inch):
Length (mm):
Depth (inch):
Depth (mm):
Product Weight (Pounds):
Product Weight (Grams):
Power source:
2000 mAh
Typical battery charge life:
10-15 hours
Waist Band:
Headset Microphone:
Extra MP3 input port:
MP3 Cable:
MP3 Controls:
USB Port:
MicroSD port:
FM Radio:
LCD screen:
7.5 v
Current Consumption:
150 mAh
Frequency Response High:
100 hz +- 13dB
Frequency Response Low:
4 hz +- 1dB
Speaker Sensitivity:
53 dBV/A +- 3 dB

Product Reviews

  1. This Voiceboostermr_ak38-aker-25w. is great for my streetpreaching.it a great price.

    Posted by Unknown on 20th Sep 2017

    I want to thank you for the Voicebooster. I know it will be use.because I am a Streetpreacher..Thank you again. may God Bless. your Friend Lawrence S.Brett.

  2. Excellent Portable Speaker System

    Posted by Tom Rayborn on 26th Dec 2016

    I use the VoiceBooster MR-AK38 for preaching the gospel of Jesus Christ on college and high school campuses and on the streets. The sound is clear, the volume is sufficient for people within 100 - 150 feet and it is very portable and lightweight. I keep it in my backpack and always have it with me. I have not drained a full charge yet, so I am not sure how long I can use it between charges. But three of my preacher friends have the same model and they all say that they have never run out of power. All of their VoiceBooster's are several years old and are doing great. You can't beat this for the price and quality.

  3. Great product. Delievers as advertised.

    Posted by sam on 13th Mar 2015

    The amplifier is compact and is as loud as it says, covering a very generous distance. We are using it for street preaching and can say we are very much satisfied. We recommend it to everyone. The only thing I don't like is how it slides open, it should have a latch to keep it from doing that as it can be bothersome but not something to turn one away. All in all it is worth the purchase.

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