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SPM-4250

4-Channel Stereo Powered Mixer

Congratulations on your choice of the NADY AUDIO 

SPM-4250 Stereo Powered Mixer — you have 

purchased one of the finest stereo powered mixing units 

on the market today. This unit was developed using the 

expertise of professional sound engineers and working 

musicians. You will find that your new SPM-4250 has 

superior performance and greater flexibility than any 

other stereo powered mixer in its price range.  Please 

read this manual carefully to get the most out of your 

new unit.

Thanks for selecting NADY AUDIO as your choice in 

stereo powered mixers.

Date of Purchase _____________________________________

Dealer’s Name

 _______________________________________

City  _______________________________________________

State  _____________________ Zip _____________________

Model # ____________________________________________

Serial #  ____________________________________________

FEATURES

TABLE OF CONTENTS

FEATURES ..................................................................................2
WARNING ....................................................................................3
INSTALLATION ............................................................................4
FRONT PANEL CONTROLS & CONNECTIONS .......................5
REAR PANEL CONTROLS & CONNECTIONS ..........................8
CONNECTION .............................................................................9
SPECIFICATIONS ......................................................................10
NOTES .......................................................................................11

• 4 Mono input channels with balanced XLR Mic and 1/4” unbalanced line inputs, swit48V phantom power
• Fan-cooled, bipolar amplifier— 2 x 125W RMS @ 4 ohms (1% THD) both channels driven
• Built-in Echo Effects DSP emulates plate, gate, room, hall, stadium reverbs
• Input controls, connections and indicators include Channel Gain controls, Peak LED’s, High, Mid, and Low EQ’s; 

Channel EFF Send, Pan, and Main Volume controls

• 5 band master EQ; Aux Send and Return; Tape/CD In and Record Out stereo RCA jacks with Tape level control
• Stereo headphone output with separate volume adjust
• Internal shielded AC supply with 115V(60Hz)/230V(50Hz) select switch

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Summary of Contents for SPM-4250

Page 1: ...SPM 4250 P O W E R E D M I X E R 4 Channel Stereo Powered Mixer O W N E R S M A N U A L...

Page 2: ..._ _____________________ Zip______________________ Model _____________________________________________ Serial _ ____________________________________________ FEATURES TABLE OF CONTENTS FEATURES 2 WARNIN...

Page 3: ...he ears you should consult an audiologist 5 The product should be positioned so that proper ventilation is maintained 6 The product should be located away from heat sources such as radiators heat vent...

Page 4: ...r cooling Also do not place the SPM 4250 on high temperature devices such as power amplifiers etc or the unit may overheat in operation Although the unit s chassis is shielded against radio frequency...

Page 5: ...The GAIN control adjusts the input sensitivity of the mic and line inputs on each channel This control can be adjusted to accommodate input signals from a wide variety of sources from the high outputs...

Page 6: ...pre fader listen control adjusts the volume of the mono signal sent to the HEADPHONES 22 provided the master section PFL SWITCH 23 is enabled The signal is post EQ 5 and independent of the channel VOL...

Page 7: ...s in the master mix The red PEAK LED will light when the output signal is just below clipping It is acceptable if the red LED lights occasionally If the red LED lights more than occasionally you shoul...

Page 8: ...NECTOR The IEC socket is used to connect the power cord to an AC power source Caution Do not remove the center grounding pin 28 FUSE COMPARTMENT Replace with only the same type fuse as listed in the S...

Page 9: ...TRS phone jacks for balanced unbalanced stereo or in out inserts 3 1 4 TS unbalanced 4 RCA pin unbalanced Figures 1 Balanced XLR input connections 2 Stereo headphone connection with 1 4 TRS plug 3 1 4...

Page 10: ...OWER OUT 8 BOTH CHANNELS DRIVEN 105W RMS per side 4 BOTH CHANNELS DRIVEN 125W RMS per side FREQUENCY RESPONSE 10Hz 20KHz 3dB 5 GENERAL POWER REQUIREMENTS Voltage selectable 115VAC 60Hz or 230VAC 50Hz...

Page 11: ...artment Any service not performed by Nady will automatically void this warranty 2 Items not covered physical damage resulting from improper handling of the unit in transit from the factory by the ship...

Page 12: ...or money order or pay by credit card per instructions by the Nady Service Department Ship your unit prepaid to Nady Systems Service Department 6701 Shellmound Street Emeryville CA 94608 Include a brie...

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