Below and overleaf are listed our recommendations for different listening distances and placements. However, there is not per se any specific value that is right or wrong. Please use your own preference, discernment and hearing as guide. It is right when it sounds right.

To increase the upper midrange and lower treble frequencies compared to whatever you have currently installed use a combination marked with a greater dB value; to decrease the upper midrange and lower treble frequencies use a combination marked with a lower dB value. Should you, for any reason find the existing adjustment range insufficient please contact us for further options.

Listening Distance around 1m (nearfield listening and nearfield monitoring)

HF Level

R1

R2

Placement Suggestions

+1.5dB

15 R

10 R

Placement of speaker on a bookshelf or very close to walls

0 dB

15 R

22 R

Placement within around 1m of rear wall

- 1.5dB

15 R

47 R

Placement of speaker 2m or more from rear wall (factory fitted)

- 3 dB

15 R

not fitted

not recommended

Listening Distance around 3m (normal listening room placement and midfield monitoring)

HF Level

R1

R2

Placement Suggestions

+3 dB

15 R

10 R

not recommended

+1.5dB

15 R

22 R

Placement of speaker on a bookshelf or very close to walls

0 dB

15 R

47 R

Placement within around 1m of rear wall (factory fitted)

- 1.5dB

15 R

not fitted

Placement of speaker 2m or more from rear wall

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Abbingdon Music Research LS-77 owner manual HF Level Placement Suggestions