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Decware TORIIMONO, Owner'S Manual

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Decware TORIIMONO Owner'S Manual Download Page 6

              O W N E R S   M A N U A L                

               

Decware High Fidelity Engineering Co.,  East Peoria IL, USA   www.decware.com    

                                           

STARTING YOUR AMPLIFIER FOR THE 

FIRST TIME

Once you have the tubes installed and the power cord plugged in, the volume control 
all the way down (counter-clockwise) you are almost ready to turn it on.  BEFORE YOU 
DO, we need to familiarize you with the BIAS controls.  There are only two and they 
are extremely easy to operate. (

after the amplifier is turned on and properly 

biased, we will connect your source component.

)

We’ll start with the most important of the two controls, the one in the front of amplifier 
located between the two meters.  It is a small 1/4 inch shaft with no knob on it.  The 
knob is not used because this control is seldom adjusted, and a knob makes it easier 
to accidentally bump it out of adjustment.  

This control

 is called the 

BIAS BALANCE 

KNOB

 and it is simply used to make the two meters read the same value.

In the picture above you can see the meter on the left is for the KT88 output tube 
directly behind it.  Same for the meter on the right.  These meters show how many 
milliamps of current are going through each output tube.  Since this is a push pull 
amplifier, the objective is to get both tubes to draw the same amount of current so that 
they match.  This gives the best performance and the most power.

Summary of Contents for TORIIMONO

Page 1: ...O W N E R S M A N U A L Decware High Fidelity Engineering Co East Peoria IL USA www decware com The ZEN TORII MONOS 1 Channel 60 watt Vacuum Tube Amplifier MANUAL NO 01 REV DATE 1 2013 MODEL TORIIMONO ...

Page 2: ...the pins to be sure they are straight Since the pins are smaller in diameter they are easy to bend and are often slightly bent from handling These pins can be carefully straightened by hand or you can purchase a tube pin straightener from most tube suppliers that makes the task quick and simple Installing 9 pin tubes with pins that are not straight will damage the socket of the amplifier an item n...

Page 3: ...this is the case then it makes no difference which tube goes in the front or the back position If you plan to get creative and try mixing it up a bit by installing one of each the front tube is likely to have the biggest impact on the sound The rear tube is what we call a follower so it adds no gain to the signal just a lot of torque Often we see users placing a 6922 in the front location and a 6N...

Page 4: ...owing audiophiles at an inflated price Our power cord connector being quite the opposite is fully worthy of an expensive power cord Note Having the power cord go straight up and then curve straight down relieves the leverage on the contacts inside the power cord which in turn prevents it from prematurely wearing out Fuse The IEC connector where the power cord plugs into has a concealed door that c...

Page 5: ...ing up your speakers The bottom of these jacks are color coded The black one should be connected to the negative speaker wire There are three red jacks Use the first one next to the black if your speakers are 4 ohms Use the second one if your speakers are 8 ohms or use the third one if your speakers are 16 ohms These are industry standard 5 way binding posts that accept bare wire up to 8 AWG spade...

Page 6: ...controls the one in the front of amplifier located between the two meters It is a small 1 4 inch shaft with no knob on it The knob is not used because this control is seldom adjusted and a knob makes it easier to accidentally bump it out of adjustment This control is called the BIAS BALANCE KNOB and it is simply used to make the two meters read the same value In the picture above you can see the m...

Page 7: ...ed and then expect them to stay that way until you turn the amplifier off When you turn it on again for your next listening session you ll find the tubes will bias up right where you had them set once they have fully warmed up Of course you can make fine adjustments at any time and if music is playing just turn the volume control all the way down to make your adjustment Later on you will notice th...

Page 8: ...0 and 70 milliamps 80 milliamps should be considered the absolute maximum Running any higher will sacrifice headroom and create more heat This control may be operated while music is playing at normal listening levels or below It is common to set this control every time you change output tubes NOTE This amp is compatible with the Tungsol KT120 power tubes IF the bias is run at the lowest setting Th...

Page 9: ...nt from this stage forward to pay attention to the residual noise floor that we have established in the noise check above If it increases in any way as we hook up the source component s then we know the cables or source components are the cause The next step is to hook up your source and this can be done with the amplifier on or off but in both cases the volume control on the amplifier should alwa...

Page 10: ...at means that even if you have the XLR jacks hooked up as soon as you plug in the RCA jack it will take priority and that is all you will hear The RCA jack must not be shorted with a shorting plug when not in use Note Select your source prior to turning the amplifier on because access the switch without touching the hot output tubes will be difficult The switch is located here for sonic reasons Be...

Page 11: ... be no more transparent than the weakest link in the chain sometimes this can be a preamp The way to tell is to listen to the amps with and without a preamp and see if there is a detectible veil over the music when the preamp is used OUTPUT TUBE MATCHING TIPS The meters on this amplifier can be used to see tubes age and monitor their performance If you find that you have to adjust the bias balance...

Page 12: ...g direct coupled stages for maximum transparency and minimal phase angle SAFTEY Your amplifiers are fused however with all devices that generate heat it is not recommended to leave the amplifier on when you are not at home or during the night when you are sleeping There are no internal user serviceable parts inside this amplifier OPTIONS Your amplifier comes with a pair of Jensen JT11P1 balancing ...

Page 13: ...JEWELED MOVEMENT WINDOWED BIAS CONTROL to ADJ OUTPUT TUBES DYNAMIC BIAS BALANCE CONTROL FOR PERFECT MATCHING of EVEN UNMATCHED TUBES 1UF 600V CRYO TREATED FLAT STACKED COPPER FOIL BEES WAX SIGNAL CAPACITORS 20 POS STEPPED ATTENUATOR w GOLD CONTACTS for INPUT LEVEL GAIN CONTROL 4400 UF 500V LABORATORY GRADE POWER SUPPLY CAPS TOP GRADE GOLD TEFLON INPUT JACKS RECTIFICATION ULTRA FAST RECOVERY 3 AMP ...

Page 14: ...ended for levels up to 20 dBu at 20 Hz M High input impedance 13 kS S S S with 10 kS S S S load M High common mode rejection 107 dB at 60 Hz This transformer is designed for use in wideband line input stages Distortion remains very low and CMRR remains high even when driven by high source impedances The primary is fully balanced and its leads may be reversed to invert polarity if required A 30 dB ...

Page 15: ...3 5m Model 29 3 80 96 5mm Models 55 155 185 5oz 0 14kg Models 85 125 145 45 7oz 0 20kg Models 25 27 8oz 23kg Model 29 11oz 31kg Specifications Ordering Information AC M Microammeters R Rectifier T Type Self Shielding Movement Range Approx Impedance ohms 3 1 2 Model 45 Model Size and Catalog Number 0 100 3400 04080 AC M Milliammeters Iron Vane Rectified Movement Rectified Models Available on specia...

Page 16: ...er is the smaller Note CR is in µF Operational life time 85 C UR IR 85 C UR Shelf Life 2000 hrs at 0V 85 C or 30000 hrs at 0V 40 C Temperature range 40 to 85 C Operating 55 C to 85 C Storage The ALS30 31 series of screw terminal capacitors cover a wide range of case sizes and voltage ratings featuring high ripple currents and long life performance They are ideally suited for industrial and Can Dia...

Page 17: ...CWARE High Fidelity Engineering Co 75 S Riverview Dr East Peoria IL 61611 309 822 5255 zen decware com technical sarah decware com service O W N E R S M A N U A L Decware High Fidelity Engineering Co East Peoria IL USA www decware com ...

Page 18: ...y during the day or when your electric heat kicks on during the winter months the bias window of your amplifier can shift UP or DOWN In this case the window tends to follow the voltage If the voltage is low 113 Volts you may see the window move down several milliamps If the voltage is high 125 Volts you may see the window move up by several milliamps The combination of both A and B can cause the b...

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