Bryston SP 1 Series Instructions Manual page 20

18
Calibrating and Setting Levels / Channel to Channel
Balance.
1. Position the Sound Level Meter at the Centre point of your
listening area, at average ear height [ approximately 40 - 46
inches {102 - 117 cm.} with its microphone positioned
vertically (pointing at the ceiling). DO NOT aim the sensing
microphone at the speakers, as this will produce inaccurate
level indications.
2. Using the SP1 Remote, press and hold for approximately 3-5
seconds the key labeled "Light - Hold for TEST". It is the key
located directly below the Stop-Sign shaped "MUTE" key on
the remote control.
IMPORTANT: The Test-Noise Mode can only be initiated from the SP1
remote, and not from the front panel.
The shaped pink-noise test signal will begin with the left-front
loudspeaker. If the signal does not appear in this speaker
please stop the process and check your wiring and
connections for proper configuration.
3. Using the volume up/down arrows on the remote or the
arrow keys on the SP1 adjust the level of the noise so that it
reaches a predetermined level on the Sound Level Meter.
This is the level to which you will set ALL speakers using
the test signal and meter.The recommended calibration
level is no less than 80dB/SPL.THX specifications call for a
level of 85dB/SPL at the listening position.
4. Hit the "TEST" button again to sequence the noise to the
next speaker. The sequence is L -> C -> R -> RS -> LS ->
SUB. When the cycle is complete, the test noise signal will
end, and the unit will switch back to the previous mode. If
any output is unused (as defined by 'NONE' in the Speaker
Configuration Setup), the noise sequence will automatically
skip to the next speaker in the sequence.
Setting Channel Levels without Pink Noise
If you wish to adjust the speaker level trims without using the
pink-noise test signal, this can be done from the Front Panel
menu system.
1. First enter the main menu by pressing on any one of the
menu buttons on the SP1 front panel (< - > or SELECT).
2. Next move the cursor to "LVL". Hit 'SELECT' - You are now
in the Level Trim Menu.