Monoblock configurations

For some, the "ultimate" amplifier is a MONOBLOCK structure. With our modules you can make several types of those as well.
On request of one of our OEM customers we we altered our CS-40ps design (winter 2016, V3) in a way that we can connect extra, typical monoblock modules to a CS-40ps module. In winter 2017 we adapted this change in our CS-40 modules as well.

On the CS-40(ps) version marked as CB there are no power mosfets mounted. With the two connectors left and right of the board we can connect the special Monoblock modules we talk about here.

We started with the production of CD-modules meant to be used for "smaller" monoblock purposes:
ELTIM Monoblock built in a MODU Galaxy 230x80x280mm,
based on CS-40ps, VS-20, VR-3/30 and CD-40psMB RQ modules with 8A Mosfets (picture).
We also have a 16A variant, fitting in a 120mm high cabinet.
Just place the modules in the correct position and connect the in/out connectors to it.
In this specific monoblock (our own) we added a balanced to line converter (left top) as extra.

These monoblocks can make 150Wrms with CD-40 MB HQ, resp. 250Wrms with CS-40 MB RQ and are sufficient for most of us.

READ MORE about these most compact CD-40 MB80 and CD-40 MB120 Monoblock add-on modules.


Until 2017 there were no suitable smaller MODU cabinets with heatsinks available. On our request and advice, Modu introduced smaller versions of the Dissipante models, called Mini Dissipante.
We needed some time to find out how we could adapt these cabinetes in our setups, which appeared to be quite easy: widen the length of our CS-40 modules to the internal widht of these Mini Dissipante cabinets. With building a monoblock like this you have the (possible) intention to use truly high power, meaning that just our CS-40 module can be used. From now on our CS-40 modules will be 246mm wide, fitting exactly to the internal width of a Mini Dissipante cabinet. The can be cut down to 200mm as all other CS-modules are.

For those who want the ultimate monoblock, we also developed monoblock side modules with 2-4 pairs, meaning 2 or 4 transistors left and 2 or 4 transistors at the right side. In combination with the new (2018) CS-40 CB module they fit exactly in the new MODU Mini Dissipante cabinets:

These CD-40 MB modules are mounted directly to the heatsink flanks of these cabinets, similar as
with the smaller ones shown above. These modules are still in development, so we can't show them yet!

Actually, the 2 transistor models could also be used in combination with a CS-40ps / Galaxy cabinet.
Using more makes no sence since the power supply of this CS-40ps can deliver around 200W max.



Mounting of those HUGE side modules is done similar as in the top picture with the smaller modules, but due to the size and lots of power supply capacitors will look quite impressive.....
These extra modules bring some advantages like better speaker control, more (solid) bass fundament etc. But, more is not always better. Mosfets as we use are fantastic components, but as always have a minor mishap called the gate capacitance. This gate capacitance is truly a capacitor value measured on the control (Gate) pin of the mosfet. While adding extra mosfets this capacitance rises with the number of mosfets used. This capacitor value has to be "charged", causing a slower functioning amplifier, or in technical terms: the slew rate will go down. Happily our amps are that fast that even with four pairs they are still way faster than the best circuits in even professional mixing gear, etc. But, you probably would notice some difference in "attack" compared to one of our single pair amplifiers though.

From 2018 on, our CS-40 board is modified as mentioned above. With the "bare" board (Suffix MB CB) there are vertical mounted side connectors where some impressive CD-40 MB modules can be connected.
Since we still are in the developing phase, we can only show some drawings of them:

Two transistor CD-MB module in 80mm height, 2x 8A mosfets (right side shown only)
We also have these in 120mm  height, 2x16A Mosfets / side. Width is 298mm.

Four transistor CD-MB module in 120mm height , 4x 16A mosfets (right side shown only)
We also have these in 80mm  height, 4x 8A Mosfets / side. Width is 348mm.

The required left side versions are about 100% mirrored to these ones. They come in pairs.


We can expect around the following output power, based on a certain applied transformer voltage:

A combination of a VS-xx, CS40-MB CB and two of these CD-40 MB modules will make a truly impressive amplifier in looks AND performance. As always about without any wiring required, except for the transformer and in/out connector leads. Since there are many types we can't integrate those.
Actually, they also fit on a CS-40ps MB CB board, but due to the limited available supply capacity of around 200W, this makes no sense to us. Perhaps the double pairs in a high/deep MODU Galaxy will do fine, where the heights of these modules also exactly fit.

These large monobloc modules are still in development!