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expiredf12_26 | Staff posted Sep 20, 2025 12:25 AM

Fosi Audio BT30D Pro 2.1 Channel Bluetooth Amp $73.50 & More + Free Shipping

$74

$105

29% off
10 Comments
8.9K Views
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Deal Details
Fosiaudio [fosiaudio.com] has their Fosi Audio BT30D Pro 2.1 Channel Bluetooth Amp is on sale for $104.99 - $31.49 w/ code 8TH30 = $73.50. Shipping is free

About BT30D PRO:
  • THD: ≤ 0.03%; SNR: ≥ 108dB; Frequency Range: 20Hz - 20kHz (±1 dB)
  • MAX Power Output: 165W×2+350W
  • Input: Bluetooth + RCA; Input Sensitivity: ≤ 600mV
  • Terminating Impedance: 2-8 Ohm
  • Output: Passive/Active Speakers+ Passive/Active Subwoofer
  • Power Supply: 32V/5A, 48V/5A

Also Available
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Deal Details
Community Notes
About the Poster
Fosiaudio [fosiaudio.com] has their Fosi Audio BT30D Pro 2.1 Channel Bluetooth Amp is on sale for $104.99 - $31.49 w/ code 8TH30 = $73.50. Shipping is free

About BT30D PRO:
  • THD: ≤ 0.03%; SNR: ≥ 108dB; Frequency Range: 20Hz - 20kHz (±1 dB)
  • MAX Power Output: 165W×2+350W
  • Input: Bluetooth + RCA; Input Sensitivity: ≤ 600mV
  • Terminating Impedance: 2-8 Ohm
  • Output: Passive/Active Speakers+ Passive/Active Subwoofer
  • Power Supply: 32V/5A, 48V/5A

Also Available

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10 Comments

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Sep 20, 2025 2:24 AM
803 Comments
Joined Feb 2023
IndigoManatee4695Sep 20, 2025 2:24 AM
803 Posts
Can this run my focal aria evo x no2 speakers? They dip down to 2ohms
Sep 20, 2025 3:47 AM
1 Comments
Joined Sep 2025
HilariousBird9349Sep 20, 2025 3:47 AM
1 Posts
Quote from IndigoManatee4695 :
Can this run my focal aria evo x no2 speakers? They dip down to 2ohms
Supports speakers rated at 2–8 ohms
1
Sep 20, 2025 5:07 PM
970 Comments
Joined Jan 2021
BlownCamaroSep 20, 2025 5:07 PM
970 Posts
This is a very good price on a great little amp! I used mine to power sim racing haptics and also headrest speakers. It's LOUD and shakes the seat.
Sep 20, 2025 8:45 PM
5.2K Comments
Joined Dec 2009
SDSummerDaySep 20, 2025 8:45 PM
5,228 Posts
what exactly does
"MAX Power Output: 165W×2+350W"
mean?
Sep 20, 2025 9:37 PM
497 Comments
Joined Oct 2014
batavooshSep 20, 2025 9:37 PM
497 Posts
Quote from seanleeforever :
what exactly does
"MAX Power Output: 165W×2+350W"
mean?
165 is for the left and right speaker and 350 for the subwoofer. While these specs are crazy high, I use this amp to power speakers and subs and it does put out power. I'll call it closer to those Microsystems of the 90's like then denon with the bookshelf speakers rated at 35 - 45 watts
Sep 22, 2025 12:10 AM
65 Comments
Joined Aug 2018
HonestHamster3481Sep 22, 2025 12:10 AM
65 Posts
Quote from seanleeforever :
what exactly does
"MAX Power Output: 165W×2+350W"
mean?
Those outputs are only possible with a 48v 10amp power supply and likely 4ohm nominal speakers. . This comes with a 36v 5a power supply and the output with typical 6-8ohm speakers will be less. There will still be more than enough power for normal listening volumes.
I've used a couple of similar amps and they work great.
Original Poster
Pro
Staff
Sep 25, 2025 11:59 PM
39.6K Comments
Joined Apr 2014
f12_26Sep 25, 2025 11:59 PM
Original Poster
Pro
Staff
39,641 Posts
Front page reference for Fosi Audio K5 Pro https://slickdeals.net/f/17456628-fosi-audio-k5-pro-gaming-dac-headphone-amplifier-mini-hi-fi-stereo-for-ps5-pc-mac-smartphone-free-shipping-56?src=SiteSearch

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Sep 26, 2025 12:40 AM
1.1K Comments
Joined Nov 2011
topshelf207Sep 26, 2025 12:40 AM
1,095 Posts
It's weird the THD is <.03% when the BT20A Pro is <.005%
Sep 27, 2025 12:08 PM
73 Comments
Joined May 2018
SharpSardine8228Sep 27, 2025 12:08 PM
73 Posts
Quote from topshelf207 :
It's weird the THD is <.03% when the BT20A Pro is <.005%
The 30D has more complex circuit design and cross-over to integrate the second chip to power a subwoofer. It also has more complex tone controls to introduce noise into the circuit.
1
Jan 31, 2026 5:58 AM
151 Comments
Joined Jan 2014
nvpcfixJan 31, 2026 5:58 AM
151 Posts
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