The website catalogue did not show what I demand model, how can I do?

 Besides widely used general models, acoustic components were produced with customer’s request dimension and parameters. Therefore, as non-standard product, we can not gather all models here. PLS send us your request dimension and parameters, we would recommend our most proper model or take design & make new tooling for you!

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 What is the best sample rate and sample size to use?

 There is no best size - selection is a compromise between increased frequency resolution (more sample points or lower sample rate), noise immunity (more sample points), and performance (less of everything).

 For woofer impedance testing (to get Q and resonance) use the largest sample size and lowest sample rate possible. Note that sample rates below 44KHz are not correctly filtered by most sound cards and will cause aliasing (frequency response imperfections).

 For acoustic measurements and crossover design a lower sample size is often adequate, but use a 44KHz sample rate to have woofer and tweeter response with the same frequency range.

 For passive component testing a lower sample size is often adequate.

 We recommend using 8K to 16K sample size and 44KHz sample rate for most tests. Lower sample sizes won't be significantly quicker - but noticeably less accurate. Lower sample rates will be more accurate but noise levels will increase dramatically due to the filtering issue.

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 Why are my acoustic measurements wrong?

 The first step is to try switching right/left in the Options/Preferences Measurements tab. If that doesn't help ensure that your acoustic levels are correct. Microphones have limited dynamic range. Set your amplifier volume and microphone spacing to achieve a maximum 8-16K level (using Sound Record to check absolute levels). Below 2K Speaker Workshop is unable to reliably sense the start of input acoustic data. Above 32K there is data clipping which will cause all sorts of anomolies. Also, manually adjust the mic volume in your sound mixer - we can't programmatically.