No affect sound quality
stage speaker to control volume
Lead Free Brass
You have enough planning and other things to worry about
uxcell Ball Transfer Bearing Unit 12mm 17Lbs Carbon Steel Bolt-fixing Type for Transmission Pack of 4
uxcell Compression Spring,304 Stainless Steel,3mm OD,0.3mm Wire Size,6mm Compressed Length,10mm Free Length,2N Load Capacity for Home Projects, Silver Tone,10pcs 10mm June_2023_update No affect sound qualityuxcell Compression Spring,304 Stainless Steel,3mm OD,0. 3mm Wire Size,6mm Compressed Length,10mm Free Length,2N Load Capacity for Home Projects, Silver Tone,10pcs Product Features [Products] OD: 3mm 0. 12inch; Wire Diameter: 0. 3mm 0. 01inch; Total Height: 10mm 0. 39inch [Specifications] Compressed Length: 6mm 0. 24inch; Load Capacity: 2N; Spring Rate: 0. 5 N mm. [Material] 304 Stainless steel wire offers good mechanical properties with greater