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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-26 · 6 min read · Independent comparison
• Cardo Systems Spirit Motorcycle — biggest strength: A purpose-built helmet communication system with a 400 m intercom range, cross-brand Bluetooth pairing, and a slim 32 mm speaker set designed to fit inside a helmet.
• Cardo Systems Spirit Motorcycle — biggest trade-off: It offers no noise reduction at all, and its 10-hour battery life is a fraction of the PROHEAR's. It's a communicator first, not a listening device for blocking out the world.
• PROHEAR 033 — biggest strength: Certified hearing protection (NRR 25 dB / SNR 30 dB) combined with Bluetooth 5.4 streaming, AM/FM radio with preset memory, and a 50-hour battery on a single charge.
• PROHEAR 033 — biggest trade-off: It's a bulky over-ear earmuff at 0.82 lb per unit, with no intercom and no rider-to-rider communication. Wearing it under a motorcycle helmet isn't the design intent.
• Who Cardo is for: Motorcyclists and riders who want to talk to other riders, take calls, and hear music on the move.
• Who PROHEAR is for: People running mowers, snowblowers, chainsaws, or working in any sustained loud environment who want audio and radio while protecting their hearing.
The Spirit is a helmet communication headset, and every design decision points that way. The speakers are 32 mm dynamic drivers, deliberately thin so they sit flush against the ear inside a helmet shell without creating pressure points. The whole unit weighs 150 g, and it's waterproof — Cardo explicitly lists rain, mud, dust, and snow as conditions it's built to handle. If you ride in weather, that matters.
Who should buy it: motorcyclists, and specifically riders who ride with a passenger or in a group and want to actually talk to each other. Also anyone who wants hands-free calls and music inside a helmet without a bulky device pressing on their ears.
Who should skip it: anyone who isn't wearing a helmet. If your goal is to block out a lawnmower or a table saw, the Spirit has no noise control whatsoever — the spec sheet literally lists noise control as "None." That's not a flaw in the product; it's just a different job.
PROHEAR 033: Who It's For
The PROHEAR 033 is an earmuff first. The noise reduction is the headline: NRR 25 dB and SNR 30 dB, backed by testing to ANSI S3.19-1974 and CE EN 352-1. Those are real, standardized numbers, and they mean this thing actually attenuates sound rather than just covering your ears. For mowing, snowblowing, woodworking, construction, or landscaping, that's the entire point.
On top of that protection, PROHEAR built in a full audio package. Bluetooth 5.4 handles streaming and calls, with an integrated microphone and a multifunctional button so you don't have to pull the muffs off to answer. There's also an AM/FM radio with a high-sensitivity antenna, automatic and manual station scanning, and storage for 10 AM and 10 FM presets, all shown on an LCD display.
Battery life is where this thing runs away from the Cardo. A 1500 mAh battery delivers 50 hours of continuous operation after a 6-hour charge, or 48 hours in Bluetooth mode and over 40 hours in wired/FM/AM modes. PROHEAR rates it for over 300 charge cycles. The unit is 0.82 lb, with soft snap-in ear cushions and an adjustable padded headband that fits a range of head sizes. It ships as a 2-pack.
Who should buy it: anyone doing loud outdoor or workshop tasks who wants music, radio, or a phone call without giving up their hearing protection. The 2-pack suits couples or a household splitting one set between two people.
Who should skip it: riders. There's no intercom, no helmet mounting, and the bulk works against you inside a helmet. This is a work-and-yard product.
• Best for talking to other riders → Cardo Systems Spirit Motorcycle (400 m intercom range, cross-brand Bluetooth pairing).
• Best for blocking loud noise → PROHEAR 033 (NRR 25 dB / SNR 30 dB, certified to ANSI and CE standards).
• Best for battery life → PROHEAR 033 (50 hours continuous, versus roughly 10 hours on the Cardo).
• Best for helmet fit → Cardo Systems Spirit Motorcycle (32 mm thin speakers, 150 g, over-ear placement inside a helmet).
• Best for AM/FM radio → PROHEAR 033 (high-sensitivity antenna, 20 total presets, LCD display).
• Best for wet weather → Cardo Systems Spirit Motorcycle (waterproof against rain, mud, dust, and snow).
• Best for a two-person household → PROHEAR 033 (sold as a 2-pack).
• Best for firmware staying current → Cardo Systems Spirit Motorcycle (over-the-air updates via the Cardo Connect app).
In my opinion, these two aren't really competing — they solve different problems, and picking wrong means buying something that can't do the job you need. If you ride a motorcycle and want to communicate, I'd buy the Cardo Systems Spirit Motorcycle. It's the only one of the two built for a helmet, it's waterproof, and the 400 m intercom range is the feature you'd actually miss if it weren't there. If you're mowing, snowblowing, or running power tools, I'd buy the PROHEAR 033 without hesitation — the certified noise reduction and 50-hour battery are exactly what that work demands. Decide based on where you'll wear it, not on which sounds more impressive on paper.
can you bike with headphones
That depends on the headphones and your local rules. The Cardo Systems Spirit Motorcycle is designed to mount inside a helmet and connect wirelessly over Bluetooth, so it doesn't block your ears from the outside. The PROHEAR 033 is an over-ear earmuff with sound isolation, which is a very different fit and not intended for use under a helmet.
how to bike with headphones
The practical approach is a helmet-compatible wireless system rather than loose earbuds. The Spirit uses 32 mm thin speakers that sit over the ear inside the helmet, connects to your phone over Bluetooth 5, and pairs with any Bluetooth headset of any brand. Controls run through the Cardo Connect app and media buttons on the unit.
what are the best cycling headphones
There's no single answer, because "best" depends on whether you want communication, protection, or both. For helmet-based riding, the Cardo Systems Spirit Motorcycle is the stronger match with its 400 m intercom range and waterproof build. For loud outdoor environments where you need hearing protection, the PROHEAR 033 wins on its certified NRR 25 dB / SNR 30 dB rating.
can cyclists wear headphones
Yes, cyclists can wear helmet communication systems, and the Spirit is built for exactly that. What you should avoid is assuming an earmuff like the PROHEAR 033 will work the same way — at 0.82 lb with sound isolation, it's designed for mowing, woodworking, and similar loud tasks, not for fitting under a cycling helmet. Check the current price on Amazon before you commit to either.
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