Music related stuff on eBay/Aliexpress/anywhere else - instruments, equipment, etc

[Like Ra]

copper shielding tape

Yep, will try this one, since I aeady have copper sticky tape.

[Like Ra]

Next one. Only positive reviews and no noticeable delays: LEKATO WS-90 Wireless Guitar System 5.8GHz

Sample Rate: 24bit/48KHz uncompressed professional sound quality
Wireless Band: 5.8G
Latency: 5.6ms
Range: 30m / 98.4ft outdoor or 15m / 49.2ft wall distance
THD + Noise: -98dB
Dynamic Range: > 105dB A weighted
Frequency range: 20 ~ 20KHz, 1dB/-3dB
Channel: 4 sets of devices work at the same time
Battery Capacity: 3.7V 1100mAh
Playing time: 8h

[Like Ra]

Next one. Only positive reviews and no noticeable delays: LEKATO WS-90 Wireless Guitar System 5.8GHz

Sample Rate: 24bit/48KHz uncompressed professional sound quality
Wireless Band: 5.8G
Latency: 5.6ms
Range: 30m / 98.4ft outdoor or 15m / 49.2ft wall distance
THD + Noise: -98dB
Dynamic Range: > 105dB A weighted
Frequency range: 20 ~ 20KHz, 1dB/-3dB
Channel: 4 sets of devices work at the same time
Battery Capacity: 3.7V 1100mAh
Playing time: 8h

It has arrived and it's fantastic! No noise, no hum, no delay! Works straight out of the box! What means, I do not have to rewire, shield or do anything with the small Ibanez bass - no electrical connection - no hum! (Yes, I'm still going to play with pickups and might go the extreme way - high output Dimarzio blades + 500k pots).