background image

Controls:

All Toggle switches will illuminate red when

their associated function is active

.

2

INPUT:

  Drives  more  or  less

current into the tube stage.

OUTPUT:

 Drives more or less cur-

rent into the cleaner output stage.

48V:

Supplies  48  volts  of  DC

current  for  condenser  micro-

PAD:

Reduces microphone input

signal by 20dB.

POLARITY:

Reverses  the  polar-

ity of the output signal

INPUT:

  Activates  Hi-Z  or

Microphone input jacks.

HIGH:

Frequency sweep range:

2.5Khz to 20Khz.

MID:

Frequency  sweep  range:

325hz to 5Khz.

LOW:

Frequency sweep range:

30hz to 400hz..

Each frequency band has

a cut/boost potential of

+ or - 8dB.

PRE  +  EQ:

In  this  mode,  the  EQ  section  is  internally

routed  to  serve  the  preamp’s  output  signal;  effected
signal is sent out the left bay output jack.

Independent EQ:

In this mode, the EQ section is available

as a completely independent module. The corresponding
rear right side connections are now active allowing you
to use the EQ on any external souse while the preamp
remains available on the left bay.

Summary of Contents for 583E

Page 1: ...LACHAPELL AUDIO 583 Series Vacuum Tube Preamplifier Modules for Microphones and Instruments Model s 583E S Preliminary Operating Manual ...

Page 2: ...ove 583 from the chassis wait five minutes to allow the vacuum tube to cool before attempting to remove it Using your fingers apply a slight circular rotating motion as you pull it away from the socket It is important to replace the tube with the same type When a replacement tube is installed double check that you ve inserted the correct tubes into the 583 s tube socket BEFORE powering up NOTE The...

Page 3: ...ophone input jacks HIGH Frequency sweep range 2 5Khz to 20Khz MID Frequency sweep range 325hz to 5Khz LOW Frequency sweep range 30hz to 400hz Each frequency band has a cut boost potential of or 8dB PRE EQ In this mode the EQ section is internally routed to serve the preamp s output signal effected signal is sent out the left bay output jack Independent EQ In this mode the EQ section is available a...

Page 4: ...ctly 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 3rd 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 ...

Page 5: ...ODEL 583E Diagram Microphone Input 20dB Pad Control Phantom 48v Control Direct Input Unbalanced Input Gain Output Gain Polarity Control Polarity Tube Amp Balanced Output Input Select 20dB Pad Phantom MODEL 583S Diagram ...

Page 6: ...the Products which are returned for inspection to said center within the warranty period provided such inspection discloses that the defects are as specified above and provided further that the Products has not been altered or repaired other than with authorization from LaChapell Audio and by its approved procedures not been subjected to misuse improper maintenance negligence or accident or otherw...

Page 7: ...2005 2008 LACHAPELL AUDIO 3144 N G st 125 354 Phone 209 383 3486 www lachapellaudio com ...

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