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A Series Active Monitor Speakers

E4/34 Service Date printed: 29.02.00

4.5.2.5 A5: SPL and EQ Fine-Adjustment

• Set balanced generator to 250 mVRMS (i.e. –12.0 dBV or –9.8 dBu);

• Plot frequency response sweep @ 1 m: tolerance according to the graph

below;

• EQ fine-adjustment possibilities:

1. Overall tweeter level (3…20 kHz) with trimmer potentiometer RT300

2. Overall mid-range level (450 Hz…3 kHz) with trimmer pot RT200

3. Tweeter level @ 6.8 kHz with trimmer potentiometer RT1

4. Tweeter level @ 8.8 kHz with trimmer potentiometer RT2

5. Tweeter level @ 14.7 kHz with trimmer potentiometer RT3

6. Tweeter level @ 22.0 kHz with trimmer potentiometer RT4.

Note: Basic setting of RT1 through RT4: refer to section 4.5.1.5.

4.5.2.6 A5: Distortion Check

• Set balanced generator to 250 mVRMS (i.e. –12.0 dBV or –9.8 dBu);

• Plot a 20 Hz…20 kHz THD sweep @ 1 m: tolerance according to the graph

below.

SPL @ 1 m

20 50 100 200 500 1 k 2 k 5 k 10 k 20 k

+10

–10

–20

–30

[dB]

[Hz]

–10 dB Roll off

THD + N

20 50 100 200 500 1 k 2 k 5 k 10 k 20 k

0.2

0.1

[%]

0.5

[Hz]

Studer A1 User Manual

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