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AMT Product Manual

AMT Limited Warranty.   Duration of this warrantee will remain in effect for one year from the date of the original purchase.  This warranty may be enforced by the original dated sales receipt or other proof of warranty coverage is presented when warranty service is required.



What is covered?   Except as specified below, this warranty covers all defects in materials and workmanship in this product.  The following are not covered by the warranty:



1.       Damage resulting from accident, misuse, abuse or neglect.



2.      Failure to follow instructions included with microphone.



3.      Repair or attempted repair by anyone not authorized by A.M.T.



4.      Failure to remove battery when storing.



5.      Cause other than product defects including: lack of skill, competence, or experience of use.



6.      Damages occurring during any shipment of this product (claims must be presented to carrier).



7.      Damage to any unit which has been altered, or which the serial number has been defaced, modified, or removed.



We will pay all labor and material expense for covered items.   Shipping charges are discussed later in this warranty.  If your unit needs service, please write or telephone us and we will advise you where the unit should be taken or sent.  If you write us, include your name, complete address, daytime telephone number, and a description of the problem.






If it is necessary to ship the product for service:



  1. You must pay initial shipping charges, but if necessary repairs are covered by the warrantee, AMT will cover the return shipping charges via carrier of AMT’s choice to any destination within the .
  2. Whenever warranty service is required a copy of the original dated sales receipt must be presented.
  3. For products purchased outside of the , please contact 973-729-9333 for information pertaining to your country.

Exclusion of certain damages:  AMT’s liability for any defective product is limited to repair of replacement of the product of our option.   AMT shall not be liable for damages based upon inconvenience, loss of use of the product, loss of time, interrupted operation, commercial loss; or any other damages whether incidental, consequential, or otherwise.



Some states do not allow limitations an implied warrantee lasts, and/or do not allow the exclusion or limitations of incidental or consequential damages, so the above limitations may not apply to you.  This warrantee is not enforceable outside of North America .  This warrantee gives you specific legal rights, and you may also have other rights which vary from state to state.



AMT Manual of Operation:  In choosing Applied Microphone Technology you have not only selected the best hand-crafted microphone for your specific application but a company with the finest in personalized technical support.  We understand difficulty in the decision making process that has critical impact on your performance.



The intention of the information in this manual is to help you achieve peak performance from your AMT microphone.  Careful reading of the technical data and instructions will be helpful in the installation and maintenance of your AMT microphone, and will ensure correct operation and maximum musical reproduction.



AMT microphones represent an innovative method of microphone manufacturing.  AMT does not use an assembly line approach to construction; instead each unit is carefully hand assembled by dedicated technicians under laboratory conditions.  This procedure is required as many of the microphone components are either too small or too delicate to adapt to mass production techniques.  Without the limitations imposed by large scale production, AMT can utilize materials and concepts not attainable with other construction methods.  This concept also permits unusual flexibility in design and construction.  As a result some details of AMT microphones may differ slightly from published data and specifications.  Ongoing changes to improve performance are introduced whenever advances in technology and research permit.   Our goal is to ensure every AMT microphone is at the forefront of current design standards when it leaves our facility.  Keeping the mic clean by wiping with a damp rag on the clip and the rubber parts.  Never use us solvents to clean; you may use Armor All on rubber parts occasionally.  Even though the mic has a supple, flexible gooseneck, do not excessively bend and never twist.  Never keep in a damp or wet environment.



BELT PACK:  Open battery compartment on back by sliding pane down (#1).  Put in 9 volt battery (not supplied).  Turn volume knob fully counterclockwise until you feel the click. (This ensures the mic is off.)  Plug mic into mini-jack (A40, then plug supplied cable into the 1/4 inch jack.  This jack has a built in switch, so remember when the % inch jack is plugged in it turns the belt pack on.  LED will illuminate.  After using always unplug.



This belt pack is not only a power source for the mic, but is also a pre-amplifier.  This gives the highest quality performance in all applications.   (#5)  is the output of this system.  It can be used in both high and low impedance (low impedance cable supplied).  For applications such as sound reinforcement and recording systems make sure that the channel of the PA, recording console or amplifier (used for the mic) is turned down.



After you plug your belt pack into the PA or amplifier turn up knob fully on belt pack.  The LED will illuminate on the microphone then slowly turn up the PA or amplifier until the volume is at the required level.  Now you can use the volume knob on the belt pack to control your volume and turn it on and off.  Never keep 1/4 inch jack plugged in on the belt pack when not in use – (it will drain the battery).  Never unplug from amp or PA without turning down the channel.



The belt pack has been designed for multipurpose uses.  Even though it uses a 1/4 inch phone jack for output, it is still low impedance (balanced).






INSTRUCTIONS for Hardwired Belt Pack Microphone system series Z1, LS, WS, VS Belt packs.



The “ZS” Series:  Used with ZS, TA-2, TA-3, & Z117 Microphones.   Most instruments have sound emanating out of more than one spot, the flute and soprano saxophone being no exception; that is why we use more than one microphone on one instrument: one over the keys, the second over the armature.  The volume of this mic positioned over the keys is balanced at 100% while the one at the armature is balanced at 75%.  This is to enable reproduction of the flute’s natural sound.  The recommended placement is 3 1/2 – 4 inches over the keys for the first mic, and 1 inch away from armature for the second (see Figure 1).  When positioning the mic on the flute you may bend the flex part of the mic but never twist; this will damage the mic.  The microphone can be placed on the instrument by turning the thumbscrew counterclockwise until the jaws open enough to fit the clamp over the flute.  If at this point you have any reservations about scratching your flute we recommend making a sleeve out of felt and slipping it over the joint (see Figure 2).  Place the clip over the joint (or over the felt on the joint) and tighten thumbscrew tight enough so mic will not slide around.  If you your mic came with a belt pack, read on.



The “LS” Series: Used with P800, P880, Z1, & LS microphones.  A low profile microphone that can be used on most wind instruments with a flange on the bell.  It’s supple gooseneck and harmonic dampener absorbs most of the handling noise that is produced by keys or valves.  It is important to realize the microphone is attached to the bell of the instrument, and it must be placed in an area that keeps it safe from impact by mutes, stands, etc.  The microphone can be placed on the instrument by holding the clip between the thumb and middle finger and pressing the button with the index finger.  The indentation in the clips should be placed on the flange of the bell.  At the end of the microphone wire is a 3.5mm plug which allows it to be used with the M-42 Belt Pack.  *Z1 uses LS belt pack, however clamps on the body of the flute only.



The “WS” Series:  Used with WS microphone.  A low profile dual microphone designed with bi-directional principles.  The four primary instruments are:  Clarinet, Oboe, Bass and Alto Flute.  To attach the microphone to Clarinet or Oboe first open the clamp to the full position by turning thumbscrew counterclockwise.  The clamp has been provided with rubber cushioning to prevent marring the instrument.  If at this time you are uncomfortable placing it directly on the instrument, we suggest making a sleeve out of felt, suede, leather, or flannel.  Place the clamp over the ring joint of the bell with the longest gooseneck of the microphone able the keys.  The smaller gooseneck can be placed above the bell, or moved up to the lower keys, or anywhere in between, for a specific sound desired.



If used with Alto or Bass Flute, placement of clamp should be over the head joint.   If you have any reservations about placing it directly on the instrument, we suggest making a sleeve out of felt.  All other materials could damage the finish.   Placement of the longest gooseneck should be over the keys while the shorter should be aimed at the armature not to be in the direct path so as not to pick up wind noise.



The “VS” Series:  Used with VS microphone.  A low profile microphone designed for Violin and Viola.  This microphone incorporates a clamp that is adjustable for different widths of the Violin and Viola.   This can be achieved by loosening the set screw with the allen wrench that is provided.  Sliding the lip of the clamp to the width of the instrument.  The thumbscrew is used to apply pressure to the opposite side – to keep the microphone firmly placed on the instrument.  Allowing the user to decide how much tension they wish to apply.  The lips are fitted with soft suede to prevent marring the instrument.   If you are uncomfortable placing the microphone directly on the instrument at this time – we suggest soft material such as felt or chamois over the instrument where the clamp will be in contact.  Once you have the clamp open far enough to allow placement on the instrument turn the thumbscrew clockwise to apply pressure.  The supple gooseneck attaching the clamp to the microphone must be positioned in close proximity to the f-hole, but not point in.  Experimenting with placement will increase or decrease certain frequencies.



Caution:  It is important to realize when performing outside – the slightest breeze will create excessive noise.  A wind screen must be used in this situation.  We suggest using Windtec’s model number 2100.  After use of the microphone it is important to keep it clean.  Using a soft brush remove any rosin or residue from the head of the microphone.  For the rubber gooseneck we suggest using a damp rag, or commercial product known as Armor All.



WS, VS, LS, ZS Technical Configuration



Tip – non-inverted  Pin 2                  Ring – inverted  Pin3                  Sleeve – common  Pin 3             (See Figure 5)



We supply a 1/4 inch stereo XLR chord for balanced use.  For high impedance or, unbalanced use any high quality 1/4 inch to 1/4 inch guitar chord.   There might be some loss of signal in this mode.  Most likely it is not the signal but the amplifier is not designed for the frequencies of your particular instrument.



Remove the battery when not in use for long periods of time.  Never store belt pack with mic or chord plugged in.



REPLACING EPROM:  Turn pack so belt clip is facing you.  Remove battery cover.   There are four screws holding the belt pack together.  Remove these 4 screws (see figure 7).  Position belt pack so logo is facing you.  Carefully remove cover, exposing the circuit board.  On the circuit board is a large 24 pin chip.   Using a small screwdriver or allen wrench pry chip out of socket, being careful not to damage the pins (see figure 8).  Place new chip making sure all pins are in the sockets.  Press down gently on the chip.  Replace cover, and tighten all four screws.
















For Technical Support:


 Microphone Not Working:



  • No battery
  • battery dead
  • Mic not plugged in all the way
  • Bad wire from belt pack to PA or amplifier
  • Wrong setting on the belt pack or PA
  • EPROM installed incoreectly in belt pack.

Monday through Friday between the hours of  –  – Eastern Standard Time,   Pacific Standard Time



Excessive Feedback:



  • Too Close to sound source
  • Wrong setting on PA or amplifier
  • Gain structure on EPROM too hot.

PH: (973) 729-9333







System 1 Instructions






1.       Microphone plugs into belt pack.



2.      Switch on belt pack includes 3 positions:



a.      Bottom = Off



b.      Middle = Standard Setting



c.       Top = Rolls off the Low End



3.      The Belt pack uses 1 AA Battery OR Phantom Power.  Battery is preferred.



4.      The OFF position only works with a battery.  (When used with phantom power, the microphone will not be able to be turned off.



5.      The System 1 Microphone can plug directly into Sennheiser Belt pack Wireless Systems.  To do this, plug the microphone directly into the Sennheiser belt pack.  By pass the AMT System 1 belt pack pictured above.  To use the System 1 with other wireless belt packs, please see the AMT Interface.




Universal Clamp Instructions for System 1 & Roam 1 Elite.  (Brass, Woodwinds, Percussion, Recorder)



The Universal Clamp has two parts.  If the two parts are attached, you can use the clamp/microphone on the bell of a B-Flat clarinet, oboe, or on the barrel of a C-Flute, alto flute, bass flute, recorder or piccolo.



If you unscrew the clamp, you can now use it as a clip onto any bell of a saxophone, alto or bass clarinet, Eb Clarinet, or any bass instrument, or into a rim, tension rod, cable or rope of any percussion instrument. 



The microphone has a flexible gooseneck.  The best placement for the microphone is 3 to 4 inches in front of the bell.















Universal Clamp Instructions for System 1 & Roam 1 Elite.  (Violin, Viola, & Mandolin)



You will find extra parts that come along with the clamp.  These parts are to be used if you are using a system for violin, viola, or mandolin.   



1. Loosen Hex Set Screw with wrench.  (Do not remove)  Pull out small pin.



2. Rotate suede piece 180 degrees.



3. Replace with long pin for violin on opposite side. (Side with suede)  Then, tighten the hex screw back tight with hex wrench.



      4. Remove rubber from clamp (see figure D).  Take half round piece, remove



brown paper. (see figure E)  Press piece with  tape to clamp where the rubber was






5. Replace short screw with long screw and clamp is ready for Violin. 



* Warning:  Over tightening may damage violin.






Preamp Instructions for Studio Series Microphones / S25B Bass / S18C Cello / M40 Piano / M51.





1.  Works with 9 Volt Battery OR Phantom Power.



2. 9 Volt Battery is preferred and will last around 80 Hours.



3. The Battery is activated ONLY when the mic is plugged into the pre-amp.



4. When not using the microphone, disconnect the battery from the pre-amp.



5. Do not use both phantom power and a battery at the same time.



Ground Lift Switch: