Operating the dB500a, Using the Equalizer Section

Operating the dB500a

Controls and Functions

The following section details each part of the dB500a’s INPUT section including the MIC and LINE inputs, the two-band EQ, as well as the MIC and LINE LEVEL controls.

1MIC LEVEL

The dB500a’s MIC LEVEL controls the overall level of the microphone input. The MIC LEVEL control features an audio taper. Raise the MIC Level to adjust the volume of the microphone connected to the MIC input.

NOTE: Be sure to keep the MIC LEVEL control all the way off if there is no microphone connected.

2PEAK LED

SAMSON				4		5		6
1		3			4	4	4	4
1		3			8	8 8		8
		AMP / CLIP			8	8 8		8
		AMP / CLIP
0	10		0	10	12	12	12	12
MIC LEVEL		PROTECTION	LINE LEVEL			EQUALIZER
2					LOW 100Hz		HIGH 10KHz
2
P E A K
MIC INPUT		LINE OUTPUT	LINE INPUT

The PEAK LED will illuminate RED when the dB500a’s mic input is receiving a clipped signal. If the PEAK LED lights up, lower the MIC LEVEL control. Once the PEAK LED goes off, raise the level con- trols back up until just before the PEAK LED lights.

3DYNAMIC PROTECTION

The AMP / CLIP LED is a dual color LED used to monitor the output of the dB500a’s internal power amplifiers. When the unit is first powered on, the AMP / CLIP LED will light red (indicating the output relay is open). After the soft-start circuitry activates and the output relay closes, the AMP / CLIP will change to bright green indicating the unit is ready for operation. The LED will flash red on signal power peaks, while the green LED is still on. If there is a failure condition such as DC on the output, the output relay opens and the LED will switch to solid red, indicating a fault. If this happens, contact your authorized Samson Audio Service Center.

4LINE LEVEL

The dB500a’s LINE LEVEL controls the overall level of the LINE input and features an audio taper. Raise the LINE Level to adjust the volume of the signal connected to the LINE input.

Using the Equalizer Section

The dB500a input channels feature a 2-band equalizer allowing you to adjust the high and low fre- quencies independently. The channel’s frequency response is flat when the knobs are in the "12:00" position.

5LOW

Rotating the LOW knob towards the right will boost the bass frequencies at 100Hz by 12dB, and rotat- ing it towards the left will cut the bass frequencies at 100Hz by 12dB.

6HIGH

Rotating the HIGH knob towards the right will boost the treble frequencies at 10kHz by 12dB, and rotating it towards the left will cut the treble frequencies at 10kHz by 12dB.