When choosing an intercom system for group riding, there are a lot of options to consider. With over 5,400 reviews and a 4.3 star rating on Amazon, the LEXIN B4FM is one of the top selling helmet intercoms. Many users have reported high satisfaction levels for this model, so much so that it should certainly be considered by anyone interested in purchasing a group riding intercom. This two-unit pack supports up to 10 riders and comes equipped with a 2 year warranty as well as waterproofing rated at IP67. Check how it stacks up on our comparison table.
Specifications and Features
One of the key features of the B4FM is its Bluetooth 5.0 connection using Qualcomm chips for fast and reliable communication. When utilizing the intercom feature, you can communicate with up to 10 riders. Using Digital Signal Processing (DSP), and Clear Voice Capture (CVC), the speakers are designed to provide better voice clarity at speeds up to 75mph. Utilizing the built-in rechargeable batteries in each B4FM unit, which has a total capacity of 800mAh, you will get up to 15 hours of music or talk time. Standby time is estimated at approximately 168 hours. Charging times for your B4FM take only around 2 hours via USB-C.
As far as durability goes, the B4FM is rated as IP67, which means it has a level of protection greater than IPX5 and IPX6, which are typical ratings for lower end helmet mounted headsets. Thusly, the B4FM can endure extended periods of time exposed to heavy rain/snow/short term submergence. Included in addition to the standard functions of each B4FM unit are an FM radio with auto-scan for stations, the ability to share music between two riders and last but not least, LEXIN's Universal Pairing Technology, making it easy to pair your B4FM with any LEXIN-branded model as well as some non-LEXIN branded products.
Every purchase includes two full units of the B4FM, providing a superior price/value ratio relative to purchasing individual units from competing companies.
Performance and Sound Quality
Generally speaking, the B4FM produces fairly good audio quality for an intercom unit in its class. The Mylar coaxial speakers produce excellent midrange and treble tones and decent bass tones (as would be expected from speakers mounted inside a helmet). The volume produced by these speakers while traveling at highway speed while wearing earplugs was sufficient for both music and conversation.
The true strength of the B4FM is its intercom abilities. Connectivity between units is strong for a budget-priced model and enables open-air communication amongst up to 10 riders. Several reviewers noted that performance begins to degrade slightly after you go beyond four or five riders. Sharing music is also possible, so two riders can listen to the same song simultaneously when touring.
What Amazon Reviewers Have Said About Their Experience
With over 5,400 reviews for the B4FM, it has one of the largest bases of reviews for any intercom on Amazon.
Positive Feedback From Customers
Numerous reviewers who purchased prior models from Sena or Cardo praised the B4FM as being a substantially less expensive alternative offering comparable performance. A reviewer who owned a previous Sena model said that he could utilize his new B4FM just as effectively as his former Sena model, but at nearly half the cost. Numerous reviewers expressed admiration for the battery life of the B4FM stating that they were able to enjoy anywhere from 8 to 10 hours of ride time per charge. Most reviewers were also happy with the waterproofing abilities of the B4FM, with many commenting that they had ridden through entire days of rain without experiencing any issues.
Negative Feedback From Customers
A few reviewers indicated difficulties with the B4FM's group intercom functionality when attempting to link multiple units. Although numerous reviewers were successful connecting four to five units together consistently, they frequently encountered issues establishing successful connections between all eight or ten riders. Some reviewers experienced frustration during pairing processes, particularly when attempting to perform sequential pairing of additional units.
Some reviewers also mentioned that sound quality diminished at increased speeds. Some reviewers indicated that speaker performance remained adequate up until 60 to 70 mph, but other reviewers with louder exhaust systems or less sound-dampening helmets experienced poor reception at those speeds.
Recommendations For Purchasing
The B4FM is ideal for group riders who wish to obtain 4 to 6 rider intercom functionality without paying prices associated with Cardo or Sena. The 2-pack pricing represents a great bargain for couples or smaller groups.
Best For:
- Smaller groups (4 to 6 riders)
- Touring couples seeking reliable intercom
- Riders transitioning away from single-headphones/no-intercom
- Those valuing IP67 waterproofness
- Snowmobilers/off-road enthusiasts
Not Recommended For:
- Larger groups of 8+ riders requiring seamless mesh connectivity
- Audiophiles desiring premium music quality
- Those requiring latest mesh technologies
Frequently Asked Questions
How many riders can connect?
Up to 10 riders in group intercom mode, though best performance is with 4 to 6 riders according to reviewers.
What's the intercom range?
2km or about 1.2 miles between units in open terrain. Dense forests or urban areas reduce the range.
Is it waterproof?
Yes, IP67 rated. It handles rain, snow, and brief submersion. One of the highest waterproof ratings available.
Can it connect to other brands?
The B4FM supports universal pairing with other LEXIN models including the G2P, GTX, G16, and MeshCom. It may also pair with some third-party brands.
How's the battery life?
800mAh battery delivers up to 15 hours of music or talk time. Over 168 hours standby. Real-world use with intercom active gives about 8 to 10 hours of ride time.
What warranty does it have?
2-year warranty from LEXIN. The manufacturer has a track record of responsive customer service according to reviews.
Bottom Line
The LEXIN B4FM is a proven, well-reviewed intercom system that delivers 10-rider group communication, IP67 waterproofing, and solid audio quality at a fraction of the price of premium brands like Cardo and Sena. It's been on the market long enough to have a track record you can trust. With over 5,400 reviews and a 4.3 star average, it's one of the safest bets in the helmet intercom market for group riders who don't want to spend Cardo or Sena money. Check the comparison table to see how it stacks up against other group intercom options.
