How to Inspect Used Line Array Speakers Before You Buy
A practical 12-point inspection routine for used line array modules, covering drivers, rigging, amplifier modules and the things sellers usually forget to mention.
Knowledge base for used audio buyers
Inspection routines, freight costs, condition grading and system sizing — written by the people who test the equipment. No fluff, no listicles of gear we do not stock.
A, B, C: What Used Audio Condition Grades Actually Mean
Most used gear listings say 'excellent condition' and nothing else. Here is the grading system we use, what each grade costs you in practice, and when grade C is the smarter purchase.
Shipping Used Audio Equipment from China: Costs, Crating and Customs
What actually happens between a supplier in Guangzhou and your venue door: crating options, LCL versus FCL, duties, and the paperwork that stops a container sitting in port.
How to Test a Used Power Amplifier Without a Lab
Four measurements and one listening test that will tell you whether a used amplifier is healthy, using a multimeter, a dummy load and thirty minutes.
Used DJ Equipment: The 9-Point Checklist for Clubs and Bars
Jog wheels, cue buttons, outputs and firmware: the parts of a used CDJ or turntable that fail first, and how to test them in ten minutes.
How Many Watts Does a Bar Actually Need?
A room-size based method for choosing PA power, why amplifier watts are a poor comparison metric, and the numbers that matter more: sensitivity and coverage.
KTV Room Sound System Layout: A Room-by-Room Guide
How to lay out speakers, subs and microphones in small, medium and large KTV rooms, including the feedback problems that show up in every private room.
How this knowledge base works
Every article starts as a question a buyer asked us by email or WhatsApp. If two buyers ask the same thing, it becomes an article. Each guide links to the equipment we actually stock, and each product page links back to the guides that explain how to inspect it.
7 articles published. New guides are added every week from real buyer questions and search data.