- ELTIM Speakers
ELTIM Power Amplifiers
- Step 1: cabinet type
- Step 2: Current Stage mod.
- Step 3: Voltage Stage mod.
- Step 4: Power Supply mod.
- Step 5: Input/output mod.
- Step 6: Power enlargement
- Step 7: Voltage regulating
- Step 8: Protection module
- Step 9: Finishing
- Step 10: Burning in
- ELTIM Preamplifiers
- ELTIM Voltage Controlled Amplifiers
- ELTIM Buffer modules
- ELTIM Demo amplifier
Step 2: Current Stage mod.
In step two we go under the hood where the engine size has to be selected. With us, it's called a CS-module.
In our Power Amplifiers, the converting of a small input signal into a high current for the loudspeaker is, unlike about any othere manufacturer, done by a combination of two modules. First, the signal is fed into one of our Voltage Stage modules, which in turn feeds the current leading module.
The Voltage Stage module is explained in another chapter.
A Current Stage module is delivering the power to your loudspeakers. We now have five different models available. They all are about fully symmetrical and, depending on their capabilities using coppertracks in thickness of 35um - 120um. Please note that about all commercial amplifiers just use 15um thick tracks on cartboard like boards. With us the professional, microphonic free FR4 boards are using copper at both sides, resulting in way wider tracks as commonly used as well. Instead of using a single connector pin for a serious current leading connection, we use multi paralled pins as can be seen in the picture below. At horizontal connector there are the power leads with 2x6 pins (3A each), at the sides the speaker lines with 2x5 pins each. The larger the CS-module, the more pins (milled, goldplated beryllium copper contacts by the way) we use.
There are users telling us that they got an extra octave in the low range; this is basically caused by this PCB design, better components and better connections, but especially caused by the supply capacitors located close to the Power Mosfets.
Our mid-sized "engine": CS-80
Depending on the cabinet size, we have five Current Stage models available. The larger they get, the more you can expect. With just five basic models we can arrange amps from 20-2000 Wrms actually. These modules shape the basic character of your amplifier. You could compare it with the number of cylinders used in an engine where, as we probably all are aware of, the more cylinders, the nicer and smoother the engine responds to your right foot. Every model is available is several quality/price ranges as well.
Due to a clever arrangement by use of a very rare component, all modules output power can be definded just by selecting a corresponding transformer, that's it.
Where are the rows of power transistors we see in other brands? Simply, due to most modern Mosfets we just need a single pair to deliver 20 - 200Wrms output. That's more than enough for Home audio purposes. We can enhance it though, see sector 4.
As with any specific car brand's sound most of us immediatelly recognise, our modules all sound familiar (ELTIM sound) to each other, but have slight differences in behaviour due to the quality and number of parts used. The differences will be more power, more solid bass fundament and better speaker control. The 3D performance and "air" around the instruments and voices will stay the same. This was a tricky sentence since, if we believe some customers, our amplifiers don't "sound" at all, they just amplify. As we believe, any amp should do.
The number in the model name is NOT the rated power, but the height of the module in millimeters!
The power rate @ 4 ohms can be about doubled by the use of CD-modules, see the specific section.
Check at left under the > arrow the "Current Stage engines" we have available.