THE SEMOD tm  COMBINES THE FUNCTIONS OF A TRUE SYSTEM SPECTRUM ANALYZER (INCLUDING THE RESPONSE OF YOUR EAR),  AN EQUALIZER, A PINK NOISE GENERATOR, A PARAMETRIC 2-WAY OR 3-WAY OR 4-WAY CROSSOVER, AND A NARROW BAND SIGNAL ALTERING DEVICE (NSAtm) WHICH INCREASES STEREO SEPARATION WHILE DOUBLING THE POWER HANDLING OF YOUR UN-BRIDGED AMPLIFIERS. (NSA ELIMINATES UNNECESSARY AUDIO INFORMATION THAT LIMITS THE POWER HANDLING CAPACITY OF AMPLIFIERS.) THE SEMOD MAY ALSO BE USED IN FULL RANGE MODE. A 12 VOLT AC ADAPTER MAY BE USED FOR HOME APPLICATIONS. THE INPUTS HAVE ELECTRONIC GROUND LOOP ISOLATION WHICH MUST BE BY-PASSED  BY SOLDERING THE ISLET JUMPERS NEXT TO THE RCA INPUT JACKS. BY USING THE 4-WAY OUTPUTS, THE SOUND QUALITY IS WORTH THE COST OF THE ADDITIONAL AMPS.

AN OVERLAY TEMPLATE IS PROVIDED TO ASSIST YOU WITH IDENTIFYING THE CONTROLS AND FOR MARKING THE POSITION OF THE SLIDERS DURING SET-UP.  REMEMBER THAT DB (DECIBEL) READINGS ARE RELATIVE AND ARE ARBITRARY POINTS OF REFERENCE. ACCURACY OF THIS TYPE OF INSTRUMENT DEPENDS SOLELY UPON YOUR HEARING RESPONSE AND PREFERENCES. "GOOD SOUND" IS DETERMINED BY YOUR TASTES AND THE SEMOD WILL ENABLE YOU TO ACHIEVE PHENOMENAL SOUND WITHOUT EXPENSIVE TEST EQUIPMENT.   THE DB SCALE ON THE RIGHT SIDE OF THE SLIDE POTS CAN REPRESENT EITHER A BOOST OR CUT REFERENCE RANGE DEPENDING ON THE SETTING OF THE INPUT PRE-GAIN CONTROLS. FOR INSTANCE WITH THE INPUT POTS SET HIGH, -20 DB MIGHT BE CONSIDERED AS 0 DB  AND THE +3 DB POINT WOULD BE +23 DB. WHEN YOU COMPLETE THE SETUP, THE POSITION OF THE SLIDERS INDICATES THE ACCURATE GRAPHIC ANALYSIS OF THE COMPLETE SYSTEM INCLUDING YOUR HEARING.

PRE-GAIN POTS MATCH THE OUTPUT OF YOUR PRE-AMP OR HEAD UNIT TO THE SEMOD. THE RANGE IS 100mv TO 2v rms. IF SET TOO HIGH, DISTORTION OCCURS. WHEN SET TOO LOW, THE SIGNAL TO NOISE RATIO DEGRADES. START AT MID ROTATION AND RE-ADJUST AFTER COMPLETING THE SET-UP.

THE 40 DIP SWITCHES ALLOW YOU TO SWITCH THE SLIDERS TO THE OUTPUTS OF YOUR CHOICE. THIS IS HOW THE CROSSOVER POINTS ARE DETERMINED AND ALLOWS YOU TO SELECT THE NUMBER OF CROSSOVER SECTIONS (IE. FULL- RANGE, 2, 3, OR 4-WAY.) THE RANGES ARE AS FOLLOWS:

3-WAY ----------------- TWEETER- 1400 TO 9000 HZ LOW END.......................22000 HZ HIGH END
1,2,3, OR 4-WAY------MIDRANGE- 57 TO 358 HZ LOW END..........................1400 TO 9000 HZ HIGH END
4-WAY------------------MIDBASS- 57 TO 282 HZ LOW END..............................72 TO 358 HZ HIGH END
2,3, OR 4-WAY--------WOOFER/ SUB- 18 HZ LOW END..................................57 TO 358 HZ HIGH END

THE BUILT-IN PINK NOISE GENERATOR IS ACTIVATED BY THE SLIDE SWITCH IN THE LOWER RIGHT CORNER OF THE PANEL. ABOVE THIS SWITCH IS THE PINK NOISE LEVEL POT WHICH ALLOWS YOU TO SET THE INTENSITY OF THE PINK NOISE TO A SUITABLE LEVEL.

THE 10 GOLD RCA JACKS ARE CONFIGURED AS 2 INPUT AND 8 OUTPUT DEPENDING ON THE CROSSOVER. CARE SHOULD BE USED WHEN INSERTING OR REMOVING THE RCA CABLES TO PREVENT OVER FLEXING OF THE BOARD CAUSED BY USING EXCESSIVE FORCE THAT IS ASSOCIATED WITH DEFECTIVE RCA PLUGS.