Basic question I'm sure but how do people test new drivers when they get them. Ive got some drivers and I want to make sure there isnt any fault with them before building the enclosures.
Visual inspection looks fine and no rubbing sounds when lightly pressing on the drivers.
At the moment Im just running some full range music through each one in free air for a few hours at very low output levels but not sure how to expand on this safely. Any help appreciated.
Visual inspection looks fine and no rubbing sounds when lightly pressing on the drivers.
At the moment Im just running some full range music through each one in free air for a few hours at very low output levels but not sure how to expand on this safely. Any help appreciated.
Except for coil rubbing, I do not test new drivers. They usually are fine or obviously defective.
If you want to, you can measure the frequency response and Thiele/Small parameters. Woofers must be 'burned in' and allowed to rest first. During burn in, listen for sounds like rubbing and buzzing. Coil centring can be checked by pushing at the cone perimeter, making the cone assembly tilt. Centring is OK if the cone does not rub more easily when pushing at one spot as compared to another spot. An abnormal voice coil dc resistance is an indication of a burnt coil.
If you want to, you can measure the frequency response and Thiele/Small parameters. Woofers must be 'burned in' and allowed to rest first. During burn in, listen for sounds like rubbing and buzzing. Coil centring can be checked by pushing at the cone perimeter, making the cone assembly tilt. Centring is OK if the cone does not rub more easily when pushing at one spot as compared to another spot. An abnormal voice coil dc resistance is an indication of a burnt coil.
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