Abbingdon Music Research Reference Class Proffessional Monitor LS-77 Owner's Manual
                                                     | |
Contents
| 
25Appendix A - Adjusting tonal balanceIf you feel that the tonal balance in the upper midrange and lower treble frequencies of the LS-77 is not correctfor you, you may wish to change the resistor combination fitted under the cover labelled “High Frequency LevelAdjustment”. Some of the required adjustment may be due to the differences in listening distance while othersmay be a result of differences in taste and furnishings.Remove this cover after removing the machinescrews that hold the cover in place using the 2mmmetric hex key (Allen Key) which is providedwith your speakers (or equivalent replacement iflost). Under the cover you will in stock conditionfind two resistors one marked 15Ù and onemarked 47R. You will also find a pair of optionalresistors included per speaker, one marked 100and the other marked 220.Respectively the resistor marked 100 will bereferred to below as 10R, the 15Ù as 15R andthe one marked 220 as 22R. Using differentcombinations allows an adjustment of the uppermidrange and lower treble frequencies by +/-3dBin steps of around 1.5dB.15Ω 47ΩHFLFDesigned and Engineered in Great BritainLS 77 Professional Monitor-Sensitivity:Frequency Response:Peak Prog Handing:.Cont Power Handing. :Impedance:87dB8Ohms150W600W27Hz-40kHzIN OUT100 1000 10000Frequency Hz( )Frequency Hz( )5060708090100Output dB( )Output dB( )HFLFLevel AdjustmentHigh Frequency |
This manual is suitable for:
manualsdatabase
Your AI-powered manual search engine