Hi, Scott:
I also own the Lehmann Audio Black Cube (with the larger PWX power supply), and use it with a Grado Reference cartridge (4.5 mV output). While the Black Cube has adjustable gain up to 60dB, which should be enough for your Dynavector cartridge, most of the comments I have either read or heard suggest that the Black Cube is not the best phono preamp for moving coil cartridges (although it performs very well with higher output moving magnet and moving iron cartridges). The criticisms of the Black Cube, comparing the sound with moving coil cartridges vs. moving magnet units, is that there is less air and reduced dynamics with moving coil cartridges. I have not personally had a chance to make an A-B comparison, so please take these "second hand" observations for what they are worth. If true, however, you may find that you will be better served with a different phono preamp if you want to keep your Dynavector.
Most moving coil cartridges will work satisfactorily with 100 ohms loading. The only way to really know if 100 ohms loading and 60-dB of gain will work satisfactorily is to try it and let your ears be the judge. If you don't like what you hear, and want to keep your Dynavector, you might want to look through the Audiogon archives for posts about phono preamps that work well with moving coil cartridges (such as the Acoustech, the Coph Nia, etc.).
I also own the Lehmann Audio Black Cube (with the larger PWX power supply), and use it with a Grado Reference cartridge (4.5 mV output). While the Black Cube has adjustable gain up to 60dB, which should be enough for your Dynavector cartridge, most of the comments I have either read or heard suggest that the Black Cube is not the best phono preamp for moving coil cartridges (although it performs very well with higher output moving magnet and moving iron cartridges). The criticisms of the Black Cube, comparing the sound with moving coil cartridges vs. moving magnet units, is that there is less air and reduced dynamics with moving coil cartridges. I have not personally had a chance to make an A-B comparison, so please take these "second hand" observations for what they are worth. If true, however, you may find that you will be better served with a different phono preamp if you want to keep your Dynavector.
Most moving coil cartridges will work satisfactorily with 100 ohms loading. The only way to really know if 100 ohms loading and 60-dB of gain will work satisfactorily is to try it and let your ears be the judge. If you don't like what you hear, and want to keep your Dynavector, you might want to look through the Audiogon archives for posts about phono preamps that work well with moving coil cartridges (such as the Acoustech, the Coph Nia, etc.).
