Tosunra 4 Input Channels Mixer (F4-BT) is a small 4-channel audio mixer made for things like home recording, live streaming, and
karaoke. It has two mic inputs with phantom power for condenser mics, built-in sound effects like echo, and supports Bluetooth and
USB for playing music. You can connect it to speakers, headphones, or a recorder. It's easy to use and great for simple audio setups.
Features
Works with microphones and other audio devices
Has phantom power for condenser mics
Lets you adjust bass, mid, and treble sounds
Can play music through Bluetooth or USB
Includes built-in sound effects like echo and reverb
Has outputs for speakers, headphones, and recording
Shows sound levels with LED lights
Small, easy to carry, and simple to use
Specification
Model : TOS-F4-BT
Model / Type : 4‑channel stereo live mixer with Bluetooth & USB
Input Channels : 4: typically 2 mono (XLR + combo) + 2 stereo line
EQ per Channel : 3‑band EQ (Bass / Mid / Treble) on all channels (sometimes 2‑band on stereo ones)
Gain / Trim : Adjustable on mono/mic channels
Phantom Power : +48 V (for condenser mics)
Effects / DSP : Built‑in digital delay / reverb / echo / FX processor, with control knobs for depth and mix
Bluetooth : Yes, for wireless input
USB / MP3 / Recorder : USB input / playback, sometimes record / MP3 player function
Outputs : Main stereo (L / R), headphone output, often RCA “REC / record out”
Max Input Levels : Mic: ~ +16 dBu, Line: ~ +30 dBu, Stereo input: ~ +20 dBu (varies)
Noise / SNR : ~ –80 dB or better (noise floor)
THD + N : ≤ 0.03% at 1 kHz (typical)
Frequency Response : 20 Hz – 20 kHz (±0.5 dB)
Channel Crosstalk : ~ –82 dB or better
Headphones Output : ~300 mW into ~200 Ω load
Overall Output / Other Output : +20 dBu on other outputs
Power Supply / Consumption : DC 5 V, max ~5 W (depending on version)
Dimensions & Weight : Typical small form factor; ~0.9–1.2 kg for 4‑channel version
Other Controls / Features : Peak LED per channel, FX send/return, balance control on stereo channels, level faders or knobs
Package Includes:
1pc x Power Cord
1pc x User Manual
Weight: 1.15 kg
