US Amps Merlin MD Series User's Manual
Contents
1. accompanied by a Return Authorization Number issued by U S Amps in advance of shipment The Return Authorization Number must be clearly and conspicu ously displayed on the shipping carton or U S Amps will refuse delivery For Return Authorization Numbers first call your U S Amps dealer you purchased the products from The dealer will help you to obtain Return Authorization Numbers This warranty extends only to the original purchaser and is not transferable Defective equipment must be returned within the warranty period freight prepaid to the U S Amps Factory or an Authorized U S Amps Warranty Station This warranty covers only detects in materials and workmanship of manufactured electronic products amplifiers Incidents of misuse abuse neglect or unauthorized modification will not be covered within the terms of this warranty U S Amps reserves the right to refuse warranty service under such conditions U S AMPS WILL NOT BE RESPONSIBLE FOR ANY DAMAGES WHETHER INCIDENTAL OR CONSEQUENTIAL RELATED TO THE USE OF THIS OR ANY OTHER PRODUCT BEARING OR SOLD UNDER THE U S AMPS BRAND NAME USE THIS PRODUCT AT YOUR OWN RISK IMPROPER USE OF THIS PRODUCT CAN RESULT IN PROPERTY DAMAGE BODILY HARM AND OR OTHER DAMAGE U S AMPS ASSUMES NO RESPONSIBILITY FOR YOUR HEALTH OR SAFETY USAmbSs www usamps com2. 0 80 Examples Quiet library soft whispers Living room refrigerator away from traffic Light traffic normal conversation quiet office Air conditioner at 20 feet sewing machine Vacuum cleaner hair dryer noisy restaurant Average city traffic garbage disposal alarm clock at 2 feet The following noises can be dangerous under constant exposure 90 100 120 140 180 lay D Subway motorcycle truck traffic lawn mower Garbage truck chain saw pneumatic drill Rock band concert in front of speakers thunderclap Gunshot blast jet plane Rocket launching pad Information courtesy of the Deafness Research Foundation for a lifetime Enjoyment Model Serial Purchased Date Purchased From Write down key information of your Merlin amplifier s as noted above Please refer this information when you need assistance from our technical support or RA service You can find important warranty information on the back Limited Warranty U S Amps warrants all manufactured electronic products to be free from defects in material and workmanship for a period not to exceed ONE YEAR from the date of purchase IMPORTANT WARRANTY NOTICE U S Amps will only warrant and service products displaying valid U S Amps serial numbers WARRANTY SERVICE WILL ONLY BE PERFORMED WHEN THE UNIT IS ACCOMPANIED BY A COPY OF THE ORIGINAL SALES RECEIPT FROM AN AUTHORIZED DEALER All product returned to U S Amps for service MUST be
3. 5 Indu N S soo 600 600 coo soo soo aor 12301 __ ooexz ost xz ooz xt 2 000 X T OOSTXT OOZT XT ZHOOT ZHMOZ ZHOT OOCT XT 000T XT Aduanbea y 06 X 00T X lt OS9 XT 005 XT OOT XY SLX SL XZE AEON evan CaN 7 SPECIFICATIONS SINY INdInO 4 TROUBLESHOOTING Before removing your amplifier refer to the list below and follow the suggested procedures Always test the speakers and their wires first Confirm that all terminal strip connections are secure and tight Check both in line and built in fuses Confirm that the audio signal source car radio equalizer etc is connected and is supplying output signal To check if the amplifier is supplying signal unplug the RCA cables from the signal source but leave them plugged into the amp and briefly tap the center pin of each of the disconnected RCA plugs with your finger This should produce a noise feedback in your speakers Confirm that all terminal strip connections are secure and tight Check the BALANCE control on the head unit or other source to verify that it is set to its mid point e If you are using the low level RCA input reverse the input plugs at the amplifier switch the R with the L If the channel which is silent switches to the other side the problem is either in the h
4. INPUT SPEAKER OUTPUT usam Sees ora nen see meim mp2 Impedance 4 89 to BATTERY GROUND 77 dl from REMOTE OUTPUT J of HEAD UNIT MLT Wiring BASS REMOTE IN OUT LEVEL SUB SONIC BOOST T 7 USAm merim mp3p to OUTPUT IN OUT of HEAD UNIT D of Slave BASS REMOTE LEVEL SUB SONIC BOOST enabled An MLT led Amp PWR PRO VN T U SAmps multi link technology im re mei MD2D SPEAKER OUTPUT Lise POWER INPUT menim mpsp GROUND to BATTERY lapedunces 4 80 TT from REMOTE OUTPUT of HEAD UNIT COMMON GROUND SPEAKER OUTPUT ieee a mm DIO E z sume O ara Q POWER INPUT merim mp GROUND to BATTERY LED from REMOTE OUTPUT of HEAD UNIT A ZHNI 1491 YBIH ANARISUSS ce e er8_ T_T ajqedes sajsep a jqede5 APZI ssed 5 Aduanbeij 055019 SSed MO OS API asuodsay 24 UYIpIM pueg 4 00S 0 00S 0Zd OOS Oe OT OT OT OSZ OZ OSZ OZ 05 0 MOE OT MOE OT MOE OT asuodsay Aouanbald Y N Y N Y N 08 E8 G6 ap ZHMT Shi r uonesedas jauueyD 08 08 08 OOT OOT SOT ap 104
5. Owners Manual and Installation Guide Congratulations on your selection of a U S Amps MD series amplifier We take pride in manufacturing our products and you can expect your new amplifier to give you years of trouble free service To make your installation as easy and reliable as possible please read this manual carefully before beginning If you need more information your U S Amps Dealer will be glad to help 1986 Founded in Gainsville Florida USA 1988 First no negative feedback amplifier First one half ohm stablesamplifier Magnetic Loop Regulation 1991 First dual board amplifiers Power amplifier strapping Plexiglas panel 1992 Vari loud tone filters First class D amplifier at the IASCA Finals 1995 Mirror polished heat sink 1996 First dual torroid master slave MOSFET power supply 1997 XTERMINATOR 1998 Smart Amp Technology SAT 2000 TRUE DIGITAL full range stereo performance 2001 Utilize the vacuum tube 2002 Takes a solid step into multi channel amplifiers 2003 Class DE Digital Amplifiers 2005 New lines of products Merlin2 IS and AX Series New facility in California USA 2006 XTERMINATOR is BACK Introducing Multi Link Technology MLT 2007 Whole NEW design of Merlin2 series A gt 2 0000000000000 3 0000000000000 4 0000000000000 5 0000000000000 7 0000000000000 8 0000000000000 9 0000000000000 10 000000000000 back 0000 Con
6. bles do not run parallel to the 12V wiring Basic Wiring A IN OUT LEVEL SUBSONIC HPF X OVER LPF BASS REMOTE O Le 21 Jil to OUTPUT of HEAD UNIT HPF FULL LPF in FULL position SPEAKER OUTPUT ele ee gt OWEL INPUT 2ChPOWERAMP once Merlin mp to BATTERY GROUND from REMOTE OUTPUT of HEAD UNIT BASS LEVEL SUB SONIC HPF X OVER LPF BOOST menim mpaz PRO P OO A 4 FI Both in FULL position HPF FULL LPF to OUTPUT of HEAD UNIT POWER INPUT AHA 1H 20 a 4C0H amp FUSE FUSE FUSE SSIS ene merli mpa Impedance 4 89 to BATTERY GROUND TTT from REMOTE OUTPUT of HEAD UNIT I X 2 Bridged Wiring IN OUT LEVEL SUBSONIC HPF X OVER BAS m O n usam mea mn Y adapter OER LIL to OUTPUT of HEAD UNIT HPF FULL LPF in LOW PASS position SPEAKER OUTPUT gt OWEI INPUT RIE Merlin ma to BATTERY GROUND Minimum Impedance 45 NZ EA from REMOTE OUTPUT of HEAD UNIT EVEL SUB SONIC X OVER Ret 2 Y adapter TA Both in LOW PASS position HPF FULL LPF to OUTPUT of HEAD UNIT POWER
7. ead unit other source or the connecting cables Re adjust the Input Level Control to better suit the input signal If the noise is a whine whose pitch follows the engine speed confirm that the amplifier and any other signal sources head unit equalizer etc are properly grounded If the noise is a clicking or popping noise whose rate follows the engine speed this usually means that the vehicle is equipped with resistor spark plugs and wires or that the ignition is in need of service Check the routing of the speaker and input wires to make sure they are not adjacent to wires which interconnect with lights and other accessories If the above steps fail to improve or clear noise interference the system souled be checked by a authorized U S Amps Dealer Jump starting your vehicle can cause large voltage spikes within your automobile s electrical system To prevent damage to your stereo system make sure the entire system is shut down until full battery charge has been reached and jumper cables have been removed from the battery We want you listening for a lifetime Used wisely you new Merlin will provide a lifetime of fun and enjoyment Since hearing damage from loud sound is often undetectable until it is too late U S Amps and the Electronic Industry Associations Consumer Electronics Group recommend you avoid prolonged exposure to excessive loud sound dB level 30 40 50 60 7
8. gratulations History Milestone TOC Genuine Power Features amp Installation Basic Wiring e 2 channel Monoblock e 4 channel Bridged Wiring 2 channel 4 channel e Monoblock MLT wiring Specifications Troubleshooting Caution For Better Listening Experience Memo Limited Warranty U S Amps is a manufacturer of reliable high power quality car audio amplifiers and accessories What is your expectations U S Amps will meet your needs and provide you with genuine power and accurately reproduced sound No other company offers a wide range of high quality purpose designed amplifiers as we do Discover the secret of car audio professionals and serious sound enthusiasts For 21 years U S Amps has defined the standard of amplifier quality and power High performance listeners agree the best systems are built on a rock solid foundation of U S Amps Designed and hand crafted in our Florida Factory U S Amps are the finest car amplifiers ever built All U S Amps products are uniquely designed and carefully engineered to allow for maximum versatility and dependability A High current MOSFET devices e MMT regulated Power Supplies 35 nanosecond Switching Diodes e High capacity Power Transformer Multiple Bypass Capacitors on incoming 12V supply Time Delay Turn on with Opto coupled Muting Circuits Power supplies use Pulse width Modulation Thermal and Reverse Polarity Protectio
9. n e High efficiency Class D design 1D 2D 3D e Output stages utilize high current MOSFET devices High speed audio grade components in all low level stages Active Constant Current Bias Tracking Circuit Platinum plated RCA inputs and connectors Wide range of sensitivity accepts signal from any head unit 24dB octave Subsonic Crossover 24dB octave Lowpass Crossover True Line Output Auto Bridge feature Short Circuit Protection Use at least 8 gauge wire for power and ground connections Use at least 12 gauge wire for speaker connections Use at least 16 gauge wire for remote connection Mount the amplifier where it can receive the best ventilation Use the shortest ground connection to the chassis of the vehicle and make sure that the paint is removed at the connection point e Connect the remote input to the remote antenna output of the head unit Mount the fuse holder within 200mm 8 of the vehicle s battery Use a fuse equal to that specified for your amplifier if a large single 12V line is run which feeds more than one amplifier add up all required fuse ratings and use the total rating for the fuse Connect the speaker to the amplifier observing the correct phasing Make sure that none of the speaker connections can touch the vehicle chassis Connect the RCA inputs to the appropriate signal source using only the highest quality RCA cables Make sure that the RCA and speaker ca
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