The Speaker settings are used by REW to determine the idealised frequency response for each speaker, which depends on the bass management or crossover filtering that is applied to the signal sent to that speaker.

Current Name is an editable field in which you can enter your preferred name for the speaker. Entries are truncated to about 11 characters (the exact limit depends on the letters used as the font is proportional). If the current name is left blank or deleted the default name will be used.

Type indicates whether bass management is applied to the speaker, "Full Range" speakers (often referred to as "Large") do not have any bass management filtering applied to them, their idealised response is a flat line. "Bass Limited" speakers (often referred to as "Small") have a high pass bass management filter to remove low frequency content which they cannot reproduce, this content is usually redirected to the sub. Subwoofers have a low pass filter applied to remove high frequency information, this is usually done in the AV processor or receiver, but in some installations the subwoofer filter may be in the subwoofer.

Cutoff is the crossover frequency for this speaker, typically 80Hz in a Home Cinema system though in sub/satellite systems it can be as high as 150Hz and for main speakers with extended bass response it may be set much lower. This figure is usually found in the menus or documentation of your AV processor or receiver.