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Mundorf MResist Ultra Resistor
Overview
Please select ohm value via pull-down menu
Please note: the letter "R" is used to designate decimal separator on the resistor ratings. This system conforms to the British Standard BS 1852.
- Click here for ULTRA-RD1 (MREU30-COOL.RD1) Heat sink
- Click here for ULTRA-RD2 (MREU30-COOL.RD2) Heat sink
- Metal foil resistor
- Resistances from 0.01 ohm to 47 ohm
- Power rating: 3 watts without heat sink/ 15 watts with heat sink MREU30-COOL.RD (optionally)/ 30 watts with larger sized heat sinks
- Resistance tolerances to ±1%
- TCR (Temperature Coefficient of Resistance) to ±50ppm/K
- TO-218 (TO-247) housing
The development of our MRes Ultra Resistor is based on the well-known good tonal properties of copper-manganin foil. Compared to all wound-wire resistors, this film provides an order of magnitude lower inductance. Copper is significantly softer than the metal-oxide used for MOX resistors.
The natural resonances of the copper-manganin foil are therefore significantly less pronounced, which means that distortions caused by crystallurgy and electroacoustics are significantly reduced here. That is why resistors of this design have secured a top position among audio components in recent years: They lack many of the distortions inherent in other resistor designs.
In a further, very extensive development cycle, the micro-mechanical distortions generated by the feedback of electromechanical vibrations and microphony were minimized. For this purpose, the mechanical structure of the resistor was damped, among other things, by using heavier and more sluggish copper instead of aluminum as the carrier plate.
A whole range of adhesives and insulation materials have been tested from a micro-acoustic point of view and optimized in their interaction, so that the total micro-electroacoustic distortion of the MResUltra is significantly below the level of other resistances available on the market. As a result, fewer music details are lost in the electro-mechanical vibrations of the electrical signal, hence the very instrument’s and human voices’ properties as well as their life like staging are present in a to-date unknown clean-ness.
Optional Heat Sinks:
RD1 Heatsink Set (MREU30-COOL.RD1)
(1) Heatsink
(1) Adhesive Pad
(1) Screw and Nut long enough to attach one resistor
| Wärme-Widerstand | 6,5 KelvinWatt |
| Wattage | 1x15 Watt |
| Dimensions | L42,0xH38,1xZ25,0 mm |
| Hole Diameter @ Pitch | Ø2,3 | RM25,4 mm |
RD2 Heatsink Set (MREU30-COOL.RD2)
(1) Heatsink
(2) Adhesive Pads
(1) Screw and Nut long enough to attach two resistors
| Wärme-Widerstand | 6,5 KelvinWatt |
| Wattage | 2x7,5 Watt |
| Dimensions | L42,0xH38,1xZ25,0 mm |
| Hole Diameter @ Pitch | Ø2,3 | RM25,4 mm |
