If you want a compact, rechargeable radio and Bluetooth speaker for webinars, choose Avantree SP850; if you need a larger AM/FM radio with a more powerful mono speaker, choose Sony ICF-506. The Avantree offers more ways to play audio, while the Sony focuses on straightforward radio listening and a bigger speaker setup.
Avantree SP850 vs Sony ICF-506 at a Glance
• Avantree SP850 strength: FM radio, Bluetooth streaming, and SD-card MP3 playback in a compact, rechargeable device. Trade-off: Its 2-watt speaker is intended for personal, close-range listening rather than filling a large room.
• Sony ICF-506 strength: AM/FM reception, a powerful mono speaker, and the choice of battery or supplied AC-adaptor power. Trade-off: It is larger and heavier, and its listed playback options center on radio rather than Bluetooth or SD-card audio.
• Choose Avantree if portability, rechargeable power, Bluetooth, and several audio sources matter most.
• Choose Sony if you want AM radio, a larger mono speaker, and a simple radio that can run on AA batteries or AC power.
The SP850 is a small, multipurpose listening device. It combines FM radio, Bluetooth streaming, and MP3 playback from a standard SD card. That mix is useful if your listening shifts between radio programs, podcasts or news from a phone, and audio files stored on a card. Bluetooth pairing with a phone, tablet, or PC gives it a role beyond a conventional radio, while the SD-card option can play audio without streaming from another device.
Its compact body measures 5.12 by 1.26 by 2.6 inches and weighs 158 grams. That makes it easier to carry from a desk to a kitchen or take along for personal listening than a larger tabletop-style radio. The built-in rechargeable battery charges over USB, and the product information lists a replaceable battery. A 3.5 mm headphone jack also gives you a wired personal-listening option when you do not want audio coming from the speaker.
For station browsing, auto-scan and numeric keys provide ways to find FM stations, and number keys can save favorites. The LED display is another practical touch when you want to see information on the device rather than rely on analog tuning. Its speaker output is 2 watts, and Avantree positions the sound for clear voices and balanced audio at close range. That makes radio speech and personal listening a more natural fit than trying to cover a large room.
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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-18 · 7 min read · Independent comparison
The ICF-506 takes a simpler route: it is an analog-tuning AM/FM radio with a mono speaker. Its main appeal is focused radio listening rather than combining radio with Bluetooth streaming or SD-card playback. If your routine is to tune in to a station and listen through the built-in speaker, the Sony’s more direct set of functions may suit you better than a device with several playback modes.
At 9.06 by 2.95 by 7.28 inches and 2.1 pounds, it is substantially larger and heavier than the SP850. A built-in carry handle helps when moving it around, but this is not the more pocketable choice. Sony describes the mono speaker as powerful, making it the more speaker-focused option of these two. The trade-off is that the sound is mono, not a stereo setup.
The ICF-506 supports both AM and FM, while the SP850 is listed for FM radio. It can run on three AA batteries or use the supplied AC adaptor, which provides flexibility between portable listening and a fixed spot near an outlet. A dedicated headphone socket is listed for personal listening. For webinars, that socket can provide a private listening route, but the specs do not list Bluetooth, a microphone, or noise cancellation.
Skip it if you need Bluetooth streaming, SD-card playback, or a compact, rechargeable radio.
• Best for Bluetooth streaming → Avantree SP850. It can pair with a phone, tablet, or PC for music, podcasts, and news; the Sony’s listed focus is AM/FM radio.
• Best for AM radio → Sony ICF-506. It supports both AM and FM, while the Avantree is listed as an FM radio.
• Best for carrying in a small bag or keeping nearby on a desk → Avantree SP850. It weighs 158 grams and has a 5.12-inch listed length, compared with the Sony’s 2.1 pounds and 9.06-inch length.
• Best for a more powerful built-in speaker → Sony ICF-506. Its speaker is described as powerful; the Avantree’s 2-watt speaker is intended for close-range, personal listening.
• Best for rechargeable listening → Avantree SP850. It has a built-in rechargeable battery and USB charging. The Sony uses three AA batteries or its supplied AC adaptor.
• Best for storing MP3s on a card → Avantree SP850. Its SD-card playback gives you an option that is not listed for the Sony.
• Best for straightforward analog radio tuning → Sony ICF-506. Its analog tuner supports AM and FM, while the Avantree uses an LED display and offers auto-scan and numeric station access.
• Better suited to webinars as a compact audio source → Avantree SP850. Bluetooth and a headphone jack offer useful listening options, but neither product is specified as a microphone-equipped webinar headset.
I would choose the Avantree SP850 for most personal listening because it combines FM radio, Bluetooth, SD-card playback, USB charging, and a headphone jack in a compact device. For webinars, I would treat it as an audio playback option—not as a microphone-equipped headset or a noise-cancelling solution. I would choose the Sony ICF-506 instead if AM reception and a more powerful mono speaker matter more than portability and varied playback.
Before choosing, think about where you will listen and what audio you need to play. If webinars are the main use, neither product’s listed features establish it as a two-way headset: neither sheet specifies an integrated microphone or noise cancellation. The SP850’s Bluetooth and headphone jack support listening, but that alone does not make it a headset for speaking during meetings. The Sony likewise offers a headphone socket for personal listening, not a listed microphone.
Power is another meaningful difference. The Avantree has a built-in rechargeable battery and USB charging, which keeps its power setup simple for portable use. The Sony can take three AA batteries or connect to the supplied AC adaptor. That gives it a clear option for use near an outlet, while battery use depends on having AA cells available. Neither product’s listed information gives a battery-runtime figure, so it is not possible to compare how long either will play between charges or battery changes.
Consider the audio source, too. The SP850 can play from FM, Bluetooth, or an SD card, which is helpful if you want one device for radio and audio from other sources. The Sony concentrates on AM/FM radio and a mono speaker. Its larger body and carry handle may make sense for moving it around the home, but the size and weight are trade-offs if you plan to carry a radio regularly.
For personal listening, both list a 3.5 mm connection for headphones. That can be useful when you want to keep sound private, though the sheets do not specify included headphones. If you want to use either one for webinars, check the requirements of your meeting setup separately—especially whether you need a microphone for speaking. For current price information, check the current price on Amazon using the page’s button; the feature differences are the more useful guide to which one fits your needs.
FAQ
The Avantree has Bluetooth and a headphone jack, so it offers more listed options for listening to webinar audio. Neither product sheet specifies a microphone or noise cancellation, so neither is described as a dedicated headset for speaking in meetings.
No. It is listed as a Bluetooth speaker, not Bluetooth headphones. It also has a 3.5 mm headphone jack, but the listed features do not include built-in headphones.
Bluetooth is not listed for the Sony. Its documented features center on AM/FM radio, a mono speaker, a headphone socket, and power from three AA batteries or the supplied AC adaptor.
The Avantree is the more compact and lighter option at 158 grams, with listed dimensions of 5.12 by 1.26 by 2.6 inches. The Sony weighs 2.1 pounds and measures 9.06 by 2.95 by 7.28 inches, though it has a built-in carry handle.
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