If you're thinking of getting them with the Onkyo System Pack, don't worry. Onkyo speakers have a small threaded brass hole on the back, just like every other satellite speaker I've seen. it is a threaded hole. I had no intention of drilling a perfect speaker box to attach a mounting plate if the speaker already has a mounting method (it just wasn't included). Also, the Onkyo speakers I was trying to mount are plastic, and in my experience trying to attach anything to that plastic will only get you into trouble. The plastic is too thin and will eventually come loose due to sound waves and vibration. It will likely work well for speakers with a wood backing or no other mounting method.
Portable acoustics HUAWEI Sound Joy, 30 W, volcanic black
78 Review
Smart column Apple HomePod mini, gray space
50 Review
Women'S Bayite Stainless Steel Bands With Frame And Rhinestone Bling, Compatible With Fitbit Blaze For Stylish Replacement Accessory Straps
45 Review
SGEYR 5X1 HDMI Switcher: Choose From 5 Devices With Ease & 4K Ultra HD Support
35 Review
KLIM CD Boombox Portable Audio Player with FM Radio, Rechargeable Battery, Bluetooth, MP3, AUX, Neodymium Speakers, and Upgraded CD Laser Lens (2021 Edition)
11 Review
Sony ICFC1TBLACK Alarm Clock Radio
11 Review
Sangean PR-D4W Portable Weather Alert Radio with AM/FM Bandwidth Narrowing and Auto Tracking for Improved Searchability
12 Review
AUNA Connect 150 Black 2.1 Wi-Fi Internet Radio Music Player With MP3 USB Port, AUX & Remote Control - Black
16 Review