LaChapell Audio 503 500 Series EQ - Manual (Page 6)

Specifications:
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SAFETY PRECAUTIONS:
• Always provide adequate ventilation by allowing the top vents of your 500 series power supply chassis to
remain unobscured. Due to the vacuum tube and the internal secondary power supply, the 583 will get
warm, blocking or defeating any existing vent is not recommended.
• Never position the power supply directly above other heat generating sources such as a power amplifier.
• Always provide a source to ground (earth.) Never under any conditions should a power cord that has the
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rd prong for ground missing or defeated be used with the power supply.
• Do not place the 583 or 503 in an area where there is a potential for fluids to fall, spill into or come in
contact with the 583. If you notice fluids or moisture present inside the 583 DO NOT turn power on! Contact
LaChapell Audio for direction.
• The 583 (S or E) should only be used with power supply frames that have a >130ma rating per bay.
Power Requirements: 583S mk2 120ma
583E 248ma
503 100ma
AMPLIFIER (583S & E):
Internal Gain (microphone):
Internal Gain (Hi-Z):
Maximum Output:
Frequency Response:
THD+N:
Noise: (EIN)
SNR @30dB gain:
Input Impedance (microphone):
Input Impedance (Hi-Z):
Output Impedance:
Tube Compliment/Type:
72dB
52dB
+26dBu (1% THD+N)
10hz to 50kHz (-3dB)
Variable: 0.050% to 10%
-121dB (150ohm load)
87dB
1500 Ohm
100K Ohm
<50 Ohm
1/ea 12AX7
EQ 583E 503
Noise Floor:
THD+N:
Frequency Response:
Cut/Boost Range:
Max Input Level:
Input Impedance:
Input/Output type:
Output Impedance:
-90dB -90dB
0.014% 0.014%
10hz to 50Khz 10hz to 50Khz
+/- 8dB +/-12dB
>24dB >24dB
48kohm 48kohm
Transformer-less
50ohm 50ohm