Sonic Studios

Beta-Production DSM PORTABLE STEREO MIC PREAMPLIFIER

OWNERS MANUAL

INSTRUCTIONS & TIPS: NOTE: Images below for battery changing example only; is not latest preamp model; ALSO DOWNLOAD this page as Acrobat .pdf

Set deck to LINE Input

Setting the GAIN switch:

Select HIGHEST GAIN setting NOT showing RED CLIP LED for best preamplifier sound quality.

Allow HEADROOM (overload avoiding margin) for loudest expected sounds

  • +0 = lowest setting (+24 dB)
  • 10 = medium (+34 dB)
  • 20 = high (+44 dB
To replace the batteries:
  • First, make sure preamplifier is OFF
  • Place preamplifier on table surface facing right-side up. Remove top screw with small Phillips screwdriver and set aside.
  • Rotate the preamplifier so the front panel is opposite, and you now face the rear panel
  • With two hands, gently press down cover at indented cover marking using BOTH THUMBS and slide top backwards a little until the two front (top) locking tabs are free of front panel slots
  • NOW Remove top from bottom half section and set top aside.
  • Remove the two used cells using a fingertip pushing each cell at positive end against minus terminal spring while lifting positive end up and free of positive terminal
  • Carefully dispose of used cells. Check that inside of battery holder and replacement cells are clean, free of dust/ lint, oils/grease by wiping the battery terminals (ends) of the cells with a clean cloth before installing.
  • TIP: Give each cell a spin rotation to securely seat the battery and electrical contacts.
  • USE Eveready Photo Lithium L91 cells for full performance 200+ hours operation run time. IF necessary, use ONLY regular Alkaline AA cells as substitute for about 50 hours operation
 
The LoCUT Filter Advisory
 
PA-24NJ MODEL Specifications (Shared by all models)

The DSM + PA-24NJ is a system with extraordinary (extreme) low frequency (bass) ability to < 1 cycle with LoCUT OFF.

For example, recordings of acoustic instrument music, nature/urban ambient, and general effects recordings most often benefit with LoCUT OFF.

  • Mic Powering Input
  • Single-ended Out
  • XLR BALOutput
  • -3 dBm Bandwidth
  • Input Noise
  • Distortion
  • Battery/Time
  • Low Battery
  • Near Clip LED
  • DSM-1S/DSM-6S mics ONLY
  • +2.2 dBm ( ~ 1V RMS) 600 ohms load
  • +8.2 dBm ( ~ 2V RMS) 600 ohms load
  • <1-to-140,000 cycles (LoCut OFF)
  • <-96 dBm = 4µV (un-weighted)
  • <.04% 10 - 50,000 cycles
  • (2)AA L91 Energizer Lithium/200+ Hr.
  • 2.7 Volts (~1.35 Volts Per AA Cell)
  • -2.5 dBm Below Maximum Output
Recording these extended low frequencies is very useful or a liability depending on subject, the ambient (background), and purpose (end use). LoCUT ON is suggested for reducing low frequency noise (background rumble from air conditioning/motor traffic) in recordings of vocal narration, lecture, and interviews.
USING PA-24NJ WITH PORTABLE RECORDERS
Plug in PA-24NJ output plug secured to deck as shown in illustration at left

AFTER USING SYSTEM FOR A FEW TIMES:

Clean 3.5mm type mic plug BEFORE inserting into PA-24NJ with supplied cleaning cloth, then rotate plug several times to secure good noiseless connection. 

A single drop of pure +91% isopropyl alcohol ONLY on the metal part of the mic and preamplifier output plug just BEFORE inserting  into the jacks will insure a clean noiseless connection 

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DSM™
Patented Stereo-Surround Microphone Technology
Passive DSM™ Mic Powering/Bass Filters
 
 
 
 
Eyegear/Headband/HRTF Baffle mountable matched omni mics
Stops wind blast noise; transparent acoustic design; records real wind sounds
for MD, DAT, CF, HD, and Video Field/Event/Studio Recording
HRTF RECORDING
Stereo-Surround Omni Mic Baffle for Stand, Fishpole, Studio Boom, and Ceiling
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Portable Deck Power Solutions

Patch/Adapter Cables

Field/Studio Monitoring Headphones, Reviews

 

High-definition, low noise, very wide bandwidth preamp designs to fit any field/event/studio application using DSM™ stereo-surround mics.

MONO ONLY 'Lombardo' Lapel Mic for interview, Narration, Lecture, and clip-on acoustic instrument Recording

DSM™ Magazine Reviews
   
 
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