OWNERS MANUAL MANUAL NO. 01 REV. DATE: 1/2013 The ZEN TORII MONOS 1 Channel 60 watt Vacuum Tube Amplifier MODEL TORIIMONO Decware High Fidelity Engineering Co., East Peoria IL, USA www.decware.
OWNERS MANUAL QUICK START GUIDE - CHECKLIST Make sure you have the following items for each channel • Amplifier • PowerCord • 2 of the larger KT88 output tubes (8 pin) • 2 of the smaller 6N1P or 6922 input tubes (9 pin) 1) Install the tubes into the amplifier. Note: The large 8 pin tubes have a plastic center guide pin that fits into a notched keyway in the socket. It is important to figure out before installing the tube what the proper alignment should be.
OWNERS MANUAL Tube Locations As you can see in the picture below, the two larger tubes go into the 8 pin sockets. The tubes should be matched and it makes no difference which one goes on what side. The two smaller 9 pin tubes are of the same type. They are either 6N1P or 6922, often supplied in matched pairs, meaning both tubes are of the same type. If this is the case, then it makes no difference which tube goes in the front or the back position.
OWNERS MANUAL 2) Install Power Cord Each amplifier has a high quality IEC connector. This is an overlooked item on most amplifiers and are typically made in China with inferior plastics, metals, and feature poor electrical connections and earth grounds that change with tension, and temperature. This includes the gold plated ones being sold to unknowing audiophiles at an inflated price. Our power cord connector, being quite the opposite, is fully worthy of an expensive power cord.
OWNERS MANUAL Power Draw Each Zen TORII Mono amplifier will draw between 1.2 and 1.6 amps from the wall outlet. (150 ~175 watts) The actual amount depends on how high the tubes are biased, as higher biased tubes draw more current. Neg 4 ohm 8 ohm 16 ohm 3) Speaker Connections There are 4 gold binding posts located at the rear of each amplifier for hooking up your speakers. The bottom of these jacks are color coded. The black one should be connected to the negative speaker wire.
OWNERS MANUAL 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.
OWNERS MANUAL HOW TO USE THE BIAS BALANCE KNOB Approximately 30 to 40 seconds after the power switch has been turned on, the heaters inside the output tubes (part that glows) will begin to emit electrons and current will begin to flow. You will want to watch this happen in real time by keeping your eyes on the meters and watching them climb and seeing if the both stop at the same number. After the tubes heat up the meters will show how many milliamps of current each tube is adjusted to.
OWNERS MANUAL After the bias meters are balanced, you can raise or lower the value of them both at the same time without loosing the balance between them via this control at the rear of the amplifier. The range of this control varies with output tubes. The ideal operating point for KT88’s in this amplifier would be between 60 and 70 milliamps. 80 milliamps should be considered the absolute maximum. Running any higher will sacrifice headroom and create more heat.
OWNERS MANUAL Summary of quick start up You’re going to hook up your speakers, properly install the tubes and power cord, plug the amplifier in, turn the volume control all the way down, and turn on the amp. You’ll watch the bias meters as the tubes start to glow and within a minute or less you’ll see them register the current of each output tube. Adjust the control so they match. NOISE Check At this point, the amp is on with a speaker hooked to it and the volume is turned all the way down.
OWNERS MANUAL SOURCES - Balanced and Unbalanced The Zen TORII Mono’s feature two fully balanced XLR input jacks and one single-ended (unbalanced) RCA input jack. The two XLR jacks are selectable via a switch on the front half of the amplifier so that you can potentially have a feed from two different sources and select between them. The RCA jack is active all the time and is unaffected by the source switch.
OWNERS MANUAL Source switch - continued. When looking at the amplifier from the front, as in the picture on the previous page, moving the source switch towards you will select the XLR jack on the right, which is the one directly next to the RCA jack. Moving the source switch to the rear position selects the other XLR jack. After you have your source connected to the amplifier and music playing, slowly raise the volume control on the front to the desired listening level.
OWNERS MANUAL OPERATION If you’ve been going through this manual (highly highly recommended) and reached this point, we know you’re already listening to music and we’ll probably never see you again... but a few additional notes... TYPE OF AMP Your Class A amplifiers are a push-pull design with an adjustable fixed bias using ultralinear output transformers with multiple taps for different loudspeakers.
OWNERS MANUAL SPECIFICATIONS • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 120/240 volt 50/60Hz OPERATION: CLASS A1 INPUT TUBE CHOICES: 6922, 6N1P OUTPUT TUBE CHOICES: EL34 6CA7 KT77 6550 KT88 INPUTS: 2 BALANCED XLR INPUT JACKS FOR EACH CHANNEL - SELECTABLE INPUTS: 1 UNBALANCED RCA INPUT JACK OUTPUTS: 1 PAIR HEAVY GOLD 3 WAY BINDING POSTS PER CHANNEL FOR 4, 8, 16 OHM SPEAKERS IDLE CURRENT: 50~90 MILS PER OUTPUT TUBE - ADJUSTABLE HIGH B+ VOLTAGE: 510 VDC WITH LOAD INPUT IMPEDANCE: 38 K O
OWNERS MANUAL JT-11P-1 LINE INPUT TRANSFORMER 1:1 FOR "BALANCED BRIDGING" INPUTS M M M M M Ideal for balancing any high-impedance unbalanced input Wide bandwidth: !3 dB at 0.25 Hz and 95 kHz Recommended for levels up to +20 dBu at 20 Hz High input impedance: 13 kS S with 10 kS S load 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.
OWNERS MANUAL Ordering Information AC Microammeters Rectifier Type, Self Shielding Movement Range Model/Size and Catalog Number Approx. Impedance (ohms) 3-1/2” Model 45 04080 3400 0-100 AC Milliammeters, Iron Vane & Rectified Movement Model/Size and Catalog Number • Glass window for optimum viewing • Rugged black plastic case • Black spade-type pointer for easy distant reading Range 0-1 0-5 0-10 0-15 0-100 0-150 0-250 0-500 Approx. Impedance (ohms) @ 60 Hz 600 200 887.0 80.0 717.2 8.76 3.1 .
OWNERS MANUAL RoHS ALS30 Series 85°C • • • • • Compliant Compact size Long life, 20000 hours at 85°C (Ur, Ir applied) High ripple current Excellent surge voltage capability Optimized designs available on request APPLICATION BASIC DESIGN Smoothing, energy storage, or pulse operation in telecommunication demanding power supplies, process control, AC-motor control, traction, welding and measuring.
OWNERS MANUAL TECHNICAL QUESTIONS or SERVICE: DECWARE / High Fidelity Engineering Co. 75 S. Riverview Dr. East Peoria, IL 61611 309 822 5255 zen@decware.com - technical sarah@decware.com - service Decware High Fidelity Engineering Co., East Peoria IL, USA www.decware.
OWNERS MANUAL Added Notes: BIASING - There are some important additional notes about biasing and output tubes that you should understand. First is the bias “window”. This means “range of adjustment” and primarily concerns the rear bias control next the power cord jack on your TORII Mono’s. We have tried to define a window where the lowest bias setting you can achieve is 45 milliamps and the highest setting is 75 milliamps.
