Is it normal for it to have a hum/buzzing noise when in Aux mode? Even with no cables attached except for being plugged into power and turned on.

This is normal. It's happening because the aux line is open and there is no signal going to the speakers. I had this issue when plugging in the RCA from my DAC into the speakers. Once my DAC was plugged in, the hum goes away. As long as there is a signal going through the RCA there will be no hum. If you don't have a DAC that can be on all the time then I would recommend using optical, coax, or bluetooth.

How much hiss comes out of the tweeter?

Dear Customer, For hiss you mentioned, could you pls tell us below question? 1.What music are you using? 2.Did you open the speaker with high volume? Getting the appropriate listening volume, the speakers volume adjustment is around 80% position, please do not too loud or even to the top. Because over-adjusting the volume for both audio source and speakers may occur overload thus cause distortion during playback. In addition, excessive volume will be harmful to speaker and shorten its life. Pls help to provide us with more details by below email address: Contact us E-mail: sales@swanspeaker.com Hope to hear from you soon, thanks.

ASIN	B0BG7WWWC1
Additional Features	Bluetooth 5.0, Optical, Coaxial and Line inputs, Grey Woven Mesh Finish, Touch Control; Remote Control
Age Range Description	Adult
Antenna Location	for computers/DVD players/TV/Music Players/Gaming Consoles/Smartphones or Tablets
Audio Driver Size	10.2 Centimeters
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo
Battery Average Life	2 years
Best Sellers Rank	#122 in Computer Speakers
Bluetooth Range	10 Meters
Brand	HiVi-Swans
Built-In Media	A pair of speakers, Remotel Control, Manual
Color	Black and Grey
Compatible Devices	mobile phone/TV/Computer/Music Player
Compatible with Vehicle Type	Car
Connectivity Protocol	Bluetooth
Connectivity Technology	Bluetooth
Control Method	Touch
Controller Type	Touchpad，remote control
Customer Package Type	FFP
Customer Reviews	4.3 out of 5 stars 238 Reviews
Enclosure Material	Aluminum, rubber, silk film
Frequency Response	20 KHz
Is Waterproof	False
Item Dimensions D x W x H	7.48"D x 7.95"W x 5.23"H
Item Height	7.95 inches
Item Weight	11.2 Pounds
MP3 player	No
Manufacturer	SWAN
Maximum Range	2 Meters
Model Name	OS-10
Model Number	OS-10
Mounting Type	Tabletop, Bookshelf
Number of Audio Channels	2.0
Number of Items	1
Power Source	Corded Electric
Series Number	10
Speaker Maximum Output Power	62 Watts
Speaker Size	4 Inches
Speaker Type	Tweeter, Woofer
Specific Uses For Product	media consumption
Subwoofer Connectivity Technology	Wireless
Subwoofer Diameter	4 Inches
Tweeter Diameter	20 Millimeters
Unit Count	1.0 Count
Warranty Description	For 90 days after the date of purchase, return your undamaged HiVi-Swans product and receive a refund for ANY reason.
Warranty Type	Full
Wireless Technology	Bluetooth
Woofer Diameter	4 Inches

HiVi-Swans OS-10 HiFi Stereo Speakers, Bluetooth 5.0 Active Computer Bookshelf Speakers - 4'' Dynamic Woofer, Powered Desk Speakers 62w RMS with Touch Control for PC/Phone/TV/Monitor (Pair)

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