This is a recommended adapter for those who want to use a phone jack cable with speakers that have Speakon inputs. After purchasing it new, it has been stored at home unused, but I only tested its functionality for this listing. ■ Product Overview ・Speakon (NL4 series) male → 6.3mm standard phone jack (female) ・Convenient for connecting phone (6.3mm) cables to speakers with Speakon terminals. ・A reliable model made by NEUTRIK, a standard in professional settings. ■ Recommended for: ・Those who want to use phone cables with speakers that have Speakon inputs. ・Those in PA/live applications who want to ensure cable terminal compatibility. ・Those who want to use NEUTRIK connectors. Please refrain from purchasing if you are concerned about minor details, as this item has been stored at home. Thank you for your understanding and purchase.