Advertisement
Quick Links
Advertisement
Related Manuals for Trafomatic Audio EOS Series
Summary of Contents for Trafomatic Audio EOS Series
- Page 1 1 ...
- Page 2 2 ...
- Page 3 E OS Stereo Integrated Tube Amplifier Stereo Power Tube Amplifier User’s Manual http://www.trafomaticaudio.com/ Rev. 1 3 ...
-
Page 4: Table Of Contents
Table of Contents Section Page No. Safety Precautions 3, 4 Getting Started About Your Amplifier Construction and Testing Packaging/Unpacking 5, 6 Accessories Preparation for Use Operating Procedures Controls and Their Functions Vacuum Tube Layout: Tube Replacement 8, 9 Servicing Technical Specifications 4 ... -
Page 5: Safety Precautions 3
SAFETY PRECAUTIONS IMPORTANT SAFEGUARDS PLEASE READ CAREFULLY ALL THE FOLLOWING IMPORTANT SAFEGUARDS THAT ARE APPLICABLE TO YOUR EQUIPMENT CAUTION! TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE SCREWS. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. SAFETY 1) Read the User’s Manual and refer to it frequently during use of this product A ll the ... - Page 6 wall outlet. Tubes During operation the tubes get very hot. Do not touch the tubes since this may result in a severe burn. Allow at least 10 minutes after removing power from the tubes for them to ...
- Page 7 If you have already placed your clear tube guard onto the front of your amp, remove it now for ease of access to the tubes. You'll notice a meter dead center on the front façade of the amp. It's more than just the 'O' in EOS, it's also the meter you'll use when biasing. You'll notice that your output tubes (the big ones) are marked V1 through V4. Examine your power tubes and place them into the appropriately marked sockets. If you've already removed the tubes from their marked boxes, don't worry, the tubes are also marked on their bases. Once your output tubes are installed, install the four smaller tubes. The taller ones on the outside and shorter ones on the inside. (doesn't matter which side) Next you'll want to locate the included screwdriver. Make certain that your Eos' on/off switch (located on the left side of your amp) is toggled to 'off'. Next, connect your amp and power supply using the included umbilical. Plug the power supply into the wall. Turn the switch on the power supply (not the amp) On. Connect your speakers. If you want to be ready to listen to music directly after biasing, go ahead and connect a source. Turn on the source but keep the volume of your source at nil or zero. If you have the integrated version of the Eos, and have plugged your source into inputs 1 or 2, I would put the input selector on an input not being used. Again, turn on your source. It need not be playing, and again, keep the volume set to zero. Looking at the right side of your Eos, you'll find a bias plate. In it are 4 holes which correspond to the 4 output tubes and are so marked. If you are comfortable with using the holes, do so, many of you may find it easier to remove the plate so you can actually see the screws.(I do) You'll also want to have comfortable space around that area when biasing the amp. Give yourself a good 12 inches and this will be an easier exercise. Now you're ready to switch on your amp. I like to let the amp set for at least 3 minutes. Once that time has passed, we will begin the biasing. You'll see the bias knob dead center on the top of your amp. The tubes get a little hot, so you'll want to use caution. That's why we left the tube guard off, so one can more easily reach in and turn the knob with the tubes heated. When the knob is dead center, pointed straight back, the amp is in operational mode. Switch the bias knob two clicks to your left, or V1. You'll see the the needle on the bias meter (on the front facade) jump into action. Using your screwdriver, go ahead and adjust the corresponding screw. You'll see with a turn or two the needle will move. Don't worry about things being too awfully high or lowthis is a sturdy amp with sturdy tubes. For optimal use, we like the amp set at 50mA. Once you've set the first tube turn the bias switch to V2 and accordingly adjust the V2 screw on your bias plate also to 50mA. Repeat the same for V3 and V4. Return the bias swich to the center position. Once set, you're ready to listen to some music. Select your source and turn up the volume. For this first time, I like to leave the plate off, and reset, after about 23 hours of play. If you don't have time to wait, don't worry, just repeat the bias section after your next long listening session. Once that is done, reattach the bias plate (if you removed it). Once bias is set, you're good to listen to your Eos for a long time before any rebiasing need occur. With regular usage, biasing need only occur a few times a year, and after one or two go rounds of practice, the procedure won't take you more than 5 minutes. ...
-
Page 8: About Your Amplifier
● Figure 1: Bias plate on the right side of amplifier SERVICE 1) Replacement Parts When replacement parts are required, be sure that the service technician uses replacement parts specified by the manufacturer or parts with the same characteristics as the original ... -
Page 9: Preparation For Use
sufficient time, (a minimum of 30 minutes), for the tubes to cool down and the internal capacitors to discharge. Before you insert a tube you should make certain that the unit is disconnected from the AC outlet and that the ... -
Page 10: Operating Procedures
F igure 2 : E OS t ube layout Never use excessive force when inserting the tubes into their socket. Operating Procedure Make sure that you have read the instructions before attempting to operate your unit. Attach the audio sources and speakers (refer to the picture below). N ever run the amplifier without speakers connected since that may damage the transformers. Speaker’s minus terminal should be connected to the speaker terminal marked as zero (0) and positive terminal should be connected to the terminal that corresponds to the speaker’s nominal impedance (4 or 8 ohms).The amplifier is optimized for these impedances.Higher or lower impedances will result in higher distortion or loss of power. Do not use a speaker with impedances lower than 2 ohms on either of the outputs.Make sure to avoid short circuiting (where you cross + and with the power on) at the amplifier’s speaker terminals as that will damage the amplifier. 10 ... -
Page 11: Controls And Their Functions
Figure 3 : E OS s peakers connection NOTE: 4 ohms and 8 ohms speakers cannot be connected to the speaker terminals at the same time! Make sure your amplifier is properly connected to a highcurrent power receptacle. EOS WARNING: T he are power amplifiers. This means that they are always on at full power. Applying an unattenuated line signal, or a signal from a preamplifier with volume control fully open will result in full power output. This can damage your speakers or ears. Always take care that volume controls are in the proper position (as in turned down) and that you use a controllable source. The amplifier will be fully functional after only a couple of minutes. However, as it warms up over 30 minutes, you may notice a slight improvement in the sound quality. At the end of your listening session make sure to turn the amplifier off. Leaving it on does nothing for the sound quality and it reduces the life of the vacuum tubes. The amplifier should always be turned on and off via its own power onoff switch. Controls and Their Functions 11 ... - Page 12 tube into a socket. Should you decide to buy replacement tubes from Trafomatic Audio, rest assured that they ...
-
Page 13: Servicing
Servicing Because of its careful design and high manufacturing standards, your amplifier should normally require only minimal service to maintain its high level of performance. CAUTION: Lethal voltages are present inside the amplifier. Do not remove the amplifier’s bottom ... -
Page 14: Technical Specifications
Technical Specifications: Stereo tube amplifier Maximum output power: 100W Class of operation: A THD: 3.5% max (100W/1kHz) Bandwidth: 10Hz85kHz Inputs: 4x RCA inputs for integrated version and 1xRCA and 1x XLR for power amplifier Input sensitivity: 0.8Vef Input impedance: 100 kohm S/N : 83 dB (1KHz / 1W) Output (speaker) impedance: Speaker terminals for 4 and 8 ohms Tubes: 4 x KT120, 2 x 6N6PEV , 2x 5687 Input Voltage: 120V, 60Hz or 230V, 50Hz (as marked on the real plate of power supply box) Maximum input current: 4A at 120V, 2A at 230V Dimensions: Width x Depth x Height: 450mmx350mmx240mm Weight of amplifier: 25kg Weight of power supply box: 12 kg 14 ...
Need help?
Do you have a question about the EOS Series and is the answer not in the manual?
Questions and answers