LaChapell Audio 583E Operating Manual - Safety Precautions:
Internal Gain, microphone: 0 to >70dB
Internal Gain, Hi-Z:
0 to >50dB
Maximum output:
+26dBu (1% THD+N)
Frequency Response:
12hz to >70khz (-3dB)
THD+N:
<.25>
NOISE (EIN):
-120dB (rg. 150ohm, HP22)
Input Impedance (mic):
1.5kohm
Input Impedance (Hi-Z):
40kohm
Tube Complement:
(1) ECC83/12AX7
Output Impendence:
50ohm
Specifications:
3
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 3
rd
prong for ground missing or defeated be used with the power supply.
Do not place the 583 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 >120ma
rating per bay.
Power Requirements: 583S: 210ma • 583E: 248ma (+/- 14 volts)
AMPLIFIER:
EQ:
Noise Floor:
-93dB
THD+N:
0.014% (@ +4dB)
Frequncy Response:
Flat from 10hz to 50Khz
Cut/Boost Range:
8dB (+ or -)
Maximum Input Level:
>24dB
Input Impedance:
48kohm
Input/Output Type:
Transformer-less
Output Impendence:
50ohm