® Signature MPA 2250 Monster Home Theater Music Two Channel Reference Power Amplifier Signature MPA 3250 Monster Home Theater Music Three Channel Reference Power Amplifier Owner’s Manual
TABLE OF CONTENTS Page Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IMPORTANT SAFETY INSTRUCTIONS Please read and observe the following safety points at all times: i • Read these instructions. • Keep these instructions. • Heed all warnings. • Follow all instructions. • Do not use this apparatus near water. • Clean only with dry cloth. • Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
Additional Manufacturer Warnings WARNING – Power Sources DO NOT plug this apparatus into a power outlet that differs from the source indicated for safe use. If you don’t know the type of electrical power that is supplied to your home, please consult your local power company. WARNING – Cord Safety A. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles and the point where they exit from the apparatus.
INTRODUCTION Dear Enthusiast: Thank you for purchasing my Signature Series Monster Home Theater Music Reference Power Amplifier. I started my Signature Series in 2002 by introducing special versions of the Monster Power Automatic Voltage Stabilizer 2000, Home Theater Power Source 7000 and Reference Home Theater PowerCenter 5100.
SEPARATE POWER SUPPLIES ON EACH CHANNEL A unique feature of Monster amplifiers, which allow them to outperform any receiver, is that each channel has its own transformer and power supply. Receivers that share a single power supply across all channels will actually deliver far lower power levels than the maximum power rating when all channels are driven. Monster amps won’t sag when the power demands are high because they are designed to support the current delivery for each channel independently.
THE DESIGN MINDS BEHIND THE MONSTER HOME THEATER MUSIC REFERENCE POWER AMPLIFIERS Richard Marsh – There are few experts able to solve the complex problems of AC power. Richard Marsh is one of the illustrious few. He has designed best selling power conditioning components costing more than $3,000 and now brings his expertise to Monster Power. Richard developed Monster’s exclusive Clean Power ™ circuitry. He is also responsible for several other groundbreaking designs.
OVERVIEW The following information will guide you through the setup and operation of the MPA 2250 Monster Home Theater Music Reference Amplifier. For full Home Theater Music enjoyment please read through this entire manual before proceeding with setup. BEFORE YOU BEGIN Please make sure you have the following to best enjoy the high performance of your Monster Home Theater Music Reference Power Amplifier. A. This owner’s manual. B.
INSTALLATION GUIDELINES Before placing, connecting and using your new Monster Home Theater Music Reference amplifier, please read through these guidelines to familiarize yourself with the installation specifications. HEAT DISSIPATION The Monster Amp is a high current design, and like all amplifiers, will produce heat under normal operating conditions. To maintain proper operation of your amplifiers: DO NOT stack your amplifiers in an enclosed environment such as closets or completely enclosed audio racks.
RACK MOUNTING Your new Monster power amplifier comes with front and rear rack mounting for installing in equipment racks. The front rack ears are separate from the unit and must be installed prior to rack mounting. Please follow these instructions to mount your monster amplifier into a rack. 1. Remove the 10 Allen screws that secure the outer trim plates of the amplifier and set them aside. Take care when removing to not scratch the rack ears or face plate. 2.
3. Carefully replace the 5 Allen screws on each side. Make sure that the screws are tight. Take care when tightening to not over tighten the screws. 4. Carefully place the amplifier into the rack. Hold in position and tighten the front screws while continuing to support the amplifier. 5. Adjust the depth of the rear rack bracket to match the rails at the back of the rack. 6. Attach the rear rack brackets to the amplifier.
CONNECTION GUIDE The following section will guide you through the steps required to connect your Monster Power Amplifiers to the rest of your system. Read through this section carefully before connecting. This section has been broken into steps for each amplifier. For a complete system diagram see Appendix A. INPUT CONNECTIONS A. The Signature Monster Amplifiers provide both unbalanced (RCA) type and balanced (XLR) type connections for use with a variety of systems.
SPEAKER CONNECTIONS Just like the inputs, speaker connections are labeled with the channel name as well as being color coded. CAUTION: : When connecting speakers all polarity markings must be followed exactly or damage can occur to components. RED Positive + BLACK Negative - Never make audio connections when power is applied to the amplifiers or any other component. To prevent damage to the Monster Amplifiers and other components, never make connections when power is applied.
AMPLIFIER CONNECTIONS MPA 3250 REAR PANEL ). !# $# 6 2%-/4% 452. /. /&& '2/5.$ $# 6 "!,!.#%$ ).054 2)'(4 5."!,!.#%$ ).054 #%.4%2 "!,!.#%$ ).054 #%.4%2 5."!,!.#%$ ).054 ,%&4 "!,!.#%$ ).054 ,%&4 Ê£Ê /Ê ÊÎÊ ÊÓÊ, /Ê / ,Ê 5."!,!.#%$ ).054 2)'(4 /54 &53% ! 3,/7 6 &53% ! 3,/7 6 6/,4!'% 3%,%#4/2 /54054 &53% ! 6 3,/7 30%!+%2 /54054 2)'(4 3 . !# 6 6 37)4#(!",% 2%0,!#% 7)4( 3!-% 3):% !.$ 2!4).' 30%!+%2 /54054 #%.
MPA 3250 CONNECTIONS STEP 1 A For Unbalanced RCA Connections 1. Connect one end of the unbalanced RCA type interconnects to the preamp outputs of your receiver/preamp. 2. Connect the other end of the balanced interconnects to the appropriate channel inputs on the MPA 3250. 3. Set all Input Type Switches towards the Unbalanced Input.
STEP 1B For Balanced XLR type connections. 1. Connect one end of the balanced XLR type interconnects to the preamp outputs of the receiver/preamp you wish to use. 2. Connect the other end of the balanced interconnects to the appropriate channel inputs on the MPA 3250. 3. Set all Input Type Switches towards the Balanced Input.
STEP 2 Speaker Connections 1. Connect one end of each speaker cable to the Left, Center, and Right speaker terminals on the MPA 3250. Make sure to follow the markings for Positive and Negative to maintain proper speaker polarity. 2. Connect the other end of each speaker cable to the appropriate speakers. Make sure to follow the markings for Positive and Negative to maintain proper speaker polarity. STEP 3 Remote Trigger Connections 1.
STEP 4 AC Power Connections Monster amplifiers can be run at 115V or 230V. Verify that the voltage switch is in the correct position for your location. In the US this should be set to 115V. 1. Set the AC power selector switch to the proper voltage. 2. Connect one end of the supplied Monster AC power cord to the MPA 3250. 3. Connect the other end into the wall or Monster Power Center.
MPA 2250 CONNECTIONS MPA 2250 REAR PANEL ). !# $# 6 -/$% 2%-/4% 452. /. /&& 34%2%/ "2)$'%$ '2/5.$ $# 6 5."!,!.#%$ ).054 2)'(4 "!,!.#%$ ).054 2)'(4 "2)$'%$ "2)$'%$ 5."!,!.#%$ ).054 ,%&4 "!,!.#%$ ).054 ,%&4 Ê£Ê /Ê ÊÓÊ, /Ê /54 &53% ! 3,/7 6 &53% ! 3,/7 6 6/,4!'% 3%,%#4/2 /54054 &53% 2)'(4 ! 6 3,/7 2%0,!#% 7)4( 3!-% 3):% !.$ 2!4).' 3 . "2)$'%$ /54054 /(-3 -).)-530%!+%2 /54054 2)'(4 -/.
MPA 2250 CONNECTIONS STEP 1A For Unbalanced RCA Connection 1. Connect one end of the unbalanced RCA type interconnects to the Left and Right channel preamp outputs of your receiver or preamp processor. 2. Connect the other end of the unbalanced interconnects to the appropriate channel inputs on the MPA 2250. 3. Set Input Type Switch towards the Unbalanced Input for each input.
STEP 1B For Balanced XLR Connections 1. Connect one end of the balanced XLR type interconnects to the Left Rear and Right Rear channel preamp outputs of your receiver/preamp. 2. Connect the other end of the balanced interconnects to the appropriate channel inputs on the MPA 2250. 3. Set Input Type Switch towards the Balanced Input for each input. STEP 2 Bridged Mono / Stereo Switch 1. Set bridged mono / stereo switch to the stereo position.
STEP 3 Speaker Connections 1. Connect one end of each speaker cable to the Left and Right speaker terminals on the MPA 2250. Make sure to follow the markings for Positive and Negative to maintain proper speaker polarity. 2. Connect the other end of each speaker cable to the appropriate speakers. Make sure to follow the markings for Positive and Negative to maintain proper speaker polarity.
STEP 4 Remote Trigger Connections 1. Connect one end of the 1/8”-to-1/8” mono mini cable to the remote output of your receiver/preamp (or MPA 3250). Should your receiver not have a remote trigger out, the 12V power transformer can be plugged into the switched AC outlet on the back of your receiver. 2. Connect the other end of the 1/8”-to-1/8” mono mini cable to the remote trigger in of the MPA 2250.
STEP 5 AC Power Connections Monster amplifiers can be run at 115V or 230V. Verify that the voltage switch is in the correct position for your location. In the US this should be set to 115V. 1. Set the AC power selector switch to the proper voltage. 2. Connect one end of the supplied Monster AC power cord to the MPA 3250. 3. Connect the other end into the wall or Monster PowerCenter.
MPA 2250 BRIDGED MONO CONNECTIONS The MPA 2250 is designed to be used in a 2 channel system; in some of these systems more power may be required. In that case, two MPA 2250 amplifiers can be used in bridged mono mode which doubles the power output of the amplifiers. The following diagram shows how to make the connections. STEP 1 Unbalanced RCA Connections 1. Connect one end of the unbalanced RCA type interconnect to the preamp output of your receiver/preamp. 2.
STEP 1B Balanced XLR type connections 1. Connect one end of the balanced XLR type interconnect to the preamp output of the receiver/preamp you wish to use. 2. Connect the other end of the balanced interconnect to the right channel input on the MPA 2250. 3. Set Input Type Switch towards the Balanced Input. STEP 2 Bridged Mono/Stereo Switch 1. Set bridged mono/stereo switch to the bridged position.
STEP 3 Speaker Connections 1. Connect the positive terminal from the speaker to the right channel positive terminal of the MPA 2250. 2. Connect the negative terminal from the speaker to the left channel positive terminal of the MPA 2250. STEP 4 Remote Trigger Connections 1. Connect one end of the 1/8”-to-1/8” mono mini cable to the remote output of your receiver/preamp (or MPA 3250).
STEP 5 AC Power Connections Monster amplifiers can be run at 115V or 230V. Verify that the voltage switch is in the correct position for your location. In the US this should be set to 115V. 1. Set the AC power selector switch to the proper voltage. 4. Connect one end of the supplied Monster AC power cord to the MPA 2250. 5. Connect the other end into the wall or Monster Power Center.
MPA 3250 OPERATION MPA 3250 FRONT PANEL 1 WATTS LEFT CHANNEL WATTS RIGHT CHANNEL WATTS TOTAL POWER ON WATTS CENTER CHANNEL LEFT CHANNEL FULL POWER CENTER CHANNEL FULL POWER RIGHT CHANNEL FULL POWER CENTER DISPLAY OPTIONS CENTER CHANNEL WATTS TOTAL WATTS POWER ON/OFF DISPLAY BRIGHTNESS Signature MPA3250 MONSTER HOME THEATRE MUSIC THREE CHANNEL REFERENCE POWER AMPLIFIER 2 4 3 6 7 8 9 10 5 1.
MPA 2250 OPERATION MPA 2250 FRONT PANEL 1 WATTS LEFT CHANNEL WATTS RIGHT CHANNEL WATTS TOTAL LEFT CHANNEL FULL POWER POWER ON/OFF POWER ON RIGHT CHANNEL FULL POWER DISPLAY BRIGHTNESS Signature MPA 2250 MONSTER HOME THEATRE MUSIC TWO CHANNEL REFERENCE POWER AMPLIFIER 2 3 4 5 6 1. Channel Output Power Meters – These meters show the current power output in watts for the Left and Right Channels respectively. The center display shows the Total Power Output for both channels. 2.
TROUBLESHOOTING The following section lists some basic troubleshooting types should you encounter issues when using your Monster Power Amplifier(s). Symptom Possible Cause Remedy Amplifier Does Not Turn On Power Cord Disconnected Check power cord and connect to AC Line Blown Power Fuse Check Main power fuse on back of amplifier. Disconnect amplifier from AC before removing fuse. Replace with same value fuse only.
SPECIFICATIONS MPA 2250 SPECIFICATIONS Number of Channels 2 Channels Bridgeable Power Output - Stereo 250w @ 8Ω from 20Hz – 20kHz all channels driven 400w @ 4Ω from 20Hz – 20kHz all channels driven Power Output – Bridged Mono 650w @ 8Ω from 20Hz – 20kHz all channels driven THD + Noise <0.01% at 1 KHz and <0.02% at 20 KHz, at rated power 8 Ohms Frequency Response 20 Hz – 20 KHz +/- 0.
MPA 3250 SPECIFICATIONS Number of Channels 3 Channels Non Bridgeable Power Output - Stereo 250w @ 8Ω from 20Hz – 20kHz all channels driven 400w @ 4Ω from 20Hz – 20kHz all channels driven THD + Noise <0.01% at 1 KHz and <0.02% at 20 KHz, at rated power 8 Ohms Frequency Response 20 Hz – 20 KHz +/- 0.
APPENDIX A – SYSTEM CONNECTION DIAGRAM MPA3250 Connections MPA2250 Connections 30
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APPENDIX B – AMPLIFIER DIMENSIONS 19in / 484mm 17in / 435mm WATTS LEFT CHANNEL WATTS RIGHT CHANNEL WATTS TOTAL LEFT CHANNEL FULL POWER POWER ON/OFF POWER ON RIGHT CHANNEL FULL POWER 6.75in / 7.3in / 171mm 186mm DISPLAY BRIGHTNESS Signature MPA 2250 MONSTER HOME THEATRE MUSIC TWO CHANNEL REFERENCE POWER AMPLIFIER 20.
® Monster, LLC 7251 Lake Mead Blvd West • Las Vegas, NV 89128 • USA Visit us on the web at: MonsterPower.com “Monster” “Monster Cable” “Monster Power” “Clean Power” and “PowerCenter” are registered and unregistered trademarks of Monster, LLC.
