Bluetooth Amplifier Power Amplifier 5.0 Stereo Amplifier Audio Amplifier

Bluetooth Amplifier Power Amplifier 5.0 Stereo Amplifier Audio Amplifier

Q: What is the subwoofer frequency crossed at?

According to the Fosi site, the 'sub freq' knob does exactly what you would expect, acts as a variable crossover point control. ""...adjustable 40-300Hz cutoff frequency for subwoofer... It doesn't say what the slope of the cutoff is.

Q: Are they screw fasteners for the speaker wires?

The unit has a set of combination binding pot/RCA connections. So it will accept bare wires or RCA connectors for your speakers.

Q: has any one used this with a non powered sub, and did it sound OK ?

William, I have this Fosi amp for a small patio sound system. I do have a sub speaker but it is powered and not passive. I am 100% satisfied with the sound of my system. The Bluetooth works great as well as the aux input. This however does not answer your question but I may give you something to consider. According to Fosi specs, the rated output is 50 watts + 50 watts + 100 watts. I deduce that to mean 50 watts for each left & right speaker and 100 watts for sub speaker. That should be a sufficient 2 to 1 ratio for output division. Fosi also states that the output can be increased with an option 8 amp power supply, but they don’t state exactly how much the output increases. Whether or not a passive sub speaker would “sound ok” has many other variables, ie: size of speaker, sensitivity of speaker, speaker material, type of enclosure that houses speaker, if the enclosure is ported and if the port is tuned properly, if speaker is front firing or down firing, acoustical environment, etc, etc. It is possible a passive mode that the sub speaker may not “sound” satisfactory but may not be the fault of the Fosi amp. I hope this was helpful.

Q: I see in some reviews that there should be a bluetooth/rca switch on the back , but no switch exists on mine. how do i switch to bt and pair it?

For the BT30D theres a power switch on the front. When you turn it on it activates the Bluetooth, but uses the RCA jacks until you actually pair a device via Bluetooth. Just unpair the Bluetooth if you want to use a turntable or DAC.

4.4/5

Product ID: 728805918

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Details

Brand
Fosi Audio
Connectivity Technology
Bluetooth
Special Feature
RCA Subwoofer
Compatible Devices
Speaker
Connector Type
RCA
Audio Output Mode
ステレオ

⚡Compact 680g design, powerful output

🎵RCA & Subwoofer support for deep bass

🔊5.0 Bluetooth for crisp wireless sound

Frequently Bought Together

Fosi Audio Bluetooth Subwoofer Amplifier 2.1, BT30D Pro Subwoofer Amp with TPA3255 Chips 165W x2+350W & Bass Treble Control, 2.1 Channel Sub Amplifier for Desktop/Outdoor/Bookshelf Speakers

Banana Plugs with Dual Set Screws,Black and Red Aluminum Shell,6 Pairs

Amazon Basics 16-Gauge Speaker Wire Cable, 100 feet, Bronze

Description

🎧 Elevate your sound game—wireless power meets deep bass perfection!

PLUG AND PLAY SIMPLICITY - No batteries needed—just connect and amplify your favorite tracks instantly, perfect for busy professionals on the go.
COMPACT POWERHOUSE DESIGN - Sleek and lightweight at just 680g, this amplifier fits effortlessly into any setup without sacrificing power.
TRUSTED FOSI AUDIO QUALITY - From a brand known for premium sound gear, ensuring reliability and crisp audio clarity every time.
SEAMLESS BLUETOOTH 5 0 CONNECTIVITY - Experience flawless wireless streaming with the latest Bluetooth tech—ditch the cables, keep the vibe.
RICH DEEP BASS WITH RCA SUBWOOFER - Elevate your audio with dedicated subwoofer support and RCA inputs for immersive sound that commands attention.

The Fosi Audio BT30D PRO is a compact, 680g Bluetooth 5.0 stereo amplifier featuring RCA and subwoofer support. Designed for seamless wireless connectivity and rich, immersive sound, it requires no batteries and fits perfectly into any modern audio setup.

Specifications

Compatible Devices	Speaker
Batteries Included	No
Batteries Required	No
Brand	Fosi Audio
Item Model Number	BT30D PRO
Special Features	RCA, Subwoofer, Built-In Bluetooth
Connectivity Technology	Bluetooth
Product Dimensions	15.24 x 12.7 x 2.54 cm; 680.39 g
Item Weight	680 g

Have a Question? See What Others Asked

What is the subwoofer frequency crossed at?

Are they screw fasteners for the speaker wires?

has any one used this with a non powered sub, and did it sound OK ?

I see in some reviews that there should be a bluetooth/rca switch on the back , but no switch exists on mine. how do i switch to bt and pair it?

Common Questions

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