To the Seller, is the review correct, that the volume knob is not a master volume for the sub out?

The knobs, bass/treble/master, controls the Sub completely. Read the sub hook instructions carefully. For my example, Sony CS9 requires both the speaker's wires and amplifier's wires connect to the subwoofer on its back with the amp's sub out cable connecting to sub in. These connections ensure the sub and amp functioning as a whole unit.

Does it read normal usb flash drives like sandisk cruzer 128gb usb 2.0 flash drive?

[updated response] yes, it should work. tested it on a sandisk cruzer glide 64gb usb (2.0? not sure) works fine, not all but most (95%) the other usb drives i've test worked fine. there does seem to be an issue with some drives, like an old PNY drive (16GB USB 2.0) and/or how you format the disk, kinda works but songs will lag and pause for about 5 seconds then continue. i'm not sure if it has problems with the usb hardware version (e.g. 1.0 vs. 2.0 vs. 3.0), or the disk format (FAT vs. FAT32 vs. exFAT, **NTFS does not work**) or the USB disk size (their notes mention supporting up to 32GB). so for now i would recommend usb 3.0 or newer, 32GB, FAT32 format, i have tested all their supported (claimed) music file formats and they seem to work fine. (i mostly just use .mp3)

Seller, the bass & treble dials have no level marking so can you tell me: are they 0 to the left and +10 to the right, or, is it 0 straight up (aka 12

I assumed "straight up" was flat, i.e. +/-0db. It sounds good to me that way. Turning them to the left reducees bass/treble. Likewise, turning them to the right increases bass/treble, respectively. Hope this helps :-)

does this support aptx?

Hello. No, it doesn't support aptx.

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Douk Audio M1 PRO 320W Bluetooth Power Amplifier, 2 Channel Audio Amp, Wireless Receiver, for Home Stereo Speakers/Active Subwoofer, with Treble & Bass Control/U-Disk Music Player

Douk Audio M1 PRO 320W Bluetooth Power Amplifier, 2 Channel Audio Amp, Wireless Receiver, for Home Stereo Speakers/Active Subwoofer, with Treble & Bass Control/U-Disk Music Player

Product ID: 372179970

Details

Item dimensions L x W x H
30.8 x 25.5 x
Manufacturer
Douk Audio
Maximum supply voltage
35 Volts (DC)
Minimum supply voltage
19 Volts
Voltage
35 Volts

🎵Supports lossless U-disk playback

📶Bluetooth 5.0 with extended range

🔊320W max output power

RM778

Duties & taxes included

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Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Elevate your sound game—because your speakers deserve the M1 PRO power boost!

POWERHOUSE PERFORMANCE - Delivers a robust 160W per channel to drive even demanding passive speakers with crystal-clear HiFi sound.
SLEEK DURABLE DESIGN - Compact aluminum alloy chassis with gold-plated terminals combines style and longevity for your modern home setup.
AUDIOPHILE GRADE SOUND CONTROL - Customizable treble and bass adjustments let you tailor your audio experience to perfection.
SEAMLESS WIRELESS CONNECTIVITY - Bluetooth 5.0 with high-gain antenna ensures stable, long-range streaming from all your favorite devices.
VERSATILE MULTI SOURCE PLAYBACK - Supports stereo RCA, Bluetooth, and U-disk inputs with lossless formats like FLAC and APE for ultimate flexibility.

The Douk Audio M1 PRO is a compact yet powerful 320W Bluetooth 5.0 amplifier designed for home stereo and active subwoofer setups. Featuring a classic TDA7498E chip, it delivers 160W per channel with HiFi clarity and zero audible noise. Its versatile inputs include RCA, Bluetooth, and U-disk support for lossless audio formats, while treble and bass controls let you customize your sound. Encased in a stylish aluminum alloy body with gold-plated terminals, the M1 PRO combines durability with modern aesthetics, making it the perfect upgrade for audiophiles seeking immersive, cinema-like audio experiences.

Specifications

ASIN	B07Y8B7RBV
Brand Name	Douk Audio
Customer Reviews	4.4 4.4 out of 5 stars (630)
Included Components	1 * Power Amplifier; 1 * 32V/5A Power Supply; 1 * Manual
Item Dimensions	30.8 x 25.5 x 6.3 centimeters
Manufacturer	Douk Audio
Material Type	Aluminum alloy, Gold
Maximum Output Power	320 watts
Maximum Supply Voltage	35 Volts (DC)
Minimum Supply Voltage	19 Volts
Model	M1 PRO
Mounting Type	Surface Mount
Number of Channels	2
Number of Items	1
Number of Packs	1
Output Power	160 Watts
Package Type Name	cardboard box
Part Number	DZ071
Specification Met	FCC
Supply Current	5 Amps
Unit Count	1.0 Count
Voltage	35 Volts

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