Question 1

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

Accepted Answer

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.

Question 2

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

Accepted Answer

[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)

Question 3

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

Accepted Answer

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 :-)

Question 4

does this support aptx?

Accepted Answer

Hello. No, it doesn't support aptx.

ASIN	B07Y8B7RBV
Best Sellers Rank	#48,316 in Electronics ( See Top 100 in Electronics ) #284 in Audio Component Amplifiers
Brand Name	Douk Audio
Customer Reviews	4.4 out of 5 stars 671 Reviews
Item Dimensions	12.13 x 10.04 x 2.48 inches
Item dimensions L x W x H	12.13 x 10.04 x 2.48 inches
Manufacturer	Douk Audio
Material Type	Aluminum Alloy, Gold
Maximum Output Power	320W
Maximum Supply Voltage	35 Volts (DC)
Minimum Supply Voltage	19 Volts
Model	M1 PRO
Mounting Type	Surface Mount
Number of Channels	2
Output Power	320 Watts
Package Type Name	cardboard box
Part Number	DZ071
Specification Met	Dot
Unit Count	1.0 Count
Voltage	35 Volts

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

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