Gain 5mV for 620mV (high gain setting=41,8dB)Īctidamp Mk4 czech diy op amp based preamp with passive two stage RIAAįor reference good info about the subject can be found here: Maximum input level: 93mV (high gain setting) Note: has really small input level, and I noticed that you measured only 20mV, that is pitiful. Input sensitivity: 5mV for 500mV output (this is 100x gain, so 40 db) Meanwhile lets look at some of the options that actually specify headroom value: What is equivalent of 20dB Overload margin to Maximum input level for Schiit Mani for example? Thing is (and this is the main point of this long post) that I don't have enough technical knowledge to understand the matter completely and I am not able to convert overload margin to maximum input level or vice versa and compare the preamps. Unfortunately most of the companies do not specify it. Other important parameter that affect headroom is RIAA feedback or passive implementation, with passive giving usually higher headroom. Often none of these parameters is specified, then I usually look at the voltage of the power source as it seems to be linked directly to this metric.(18V-24V seems to be the necessary minimum). These clicks have much higher voltages than the music so I would prefer the headroom to be at least 90mV to accomodate for them with higher output cartridges. The 'overload margin' is specified in db, maximum input level in mV As it’s known this parameter is very important so that the musical peaks are not distorted and also the clicks and pops are more noticeable when they distort. The one specification that I look into now is overload margin / maximum input level. I read a lot about all the important technical considerations and I am quite annoyed that companies specify their products with different metrics (I noticed that gain can be specified in at least three different ways), some of them even omitting a lot of them (looking at you Pro-Ject). All parameters are factory pre-adjusted (default), so that the screen of your mfx®-station not only displays the correct loco type, but also the function-status symbol.I am looking into buying a new phono preamp in the sub 200E category. Variety of soundĮSU offers the LokSound V3.0 M4 decoder in many different variations for your preferred prototype. LokSound V3.0 M4 decoders are firmware updatable: The interne decoder software can be replaced. SafeguardĪll function outputs and the motor connection are overload- and short circuit protected. For owners of 6020®,- 6021® – or delta® stations, the LokSound V3.0 M4 decoder utilises the time-proven, simple programming procedure. The built-in genuine duplex communication between systems’s central unit and decoder makes this possible. ProgrammingĪll parameters of the LokSound V3.0 M4 decoder can be modified comfortably with the systems’s stations, right during operation. Besides beacon, strobe and alternate flashing, there is simulated firebox flicker as well as Mars light or Gyra light. The LokSound V3.0 M4 decoder sports four function outputs, which can be allocated individually to a function and are dimmable in 15 steps. At last you can slow down your old highspeed locos. Even starter – and top speed can be controlled. The LokSound V3.0 M4 also works (without sound) on analog AC layouts. These are transferred via four polyphonic channels to the last stage audio amplifier. Besides load-dependant operational sound it can reproduce air – or water pumps, switching noise, brake squeal or other sound sequences. It can record up to 130 seconds of sound in its 16 MBit flash-chip. The LokSound V3.0 M4 decoder can replay all loco typical sounds. Load control (back EMF) with 32 kHz High frequency regulation takes care of silky smooth, absolutely silent motor operation, and lets your engines crawl super-slowly on the layout. The last stage output runs DC or coreless motors. In combination with a mfx® station, it shows off all the M4 advantages. The decoder supports addresses 1 – 80, and stops correctly on the Märklin® braking section. You can use it with all past Märklin® stations, such as 6020, 6021 and delta® or on analog AC layouts. The multi-protocol LokSound V3.0 M4 decoder handles M4 and Motorola®. As a convinced owner of Märklin®-systems, who puts emphasis on realistic operation, you can’t pass up LokSound V3.0 M4.
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