LINKWITZ 22MG is a physical drop-in upgrade for the LX521 s low midrange driver.
Panel cutout, mounting screws and voice coil terminals are identical, making the upgrade easy for the end-user to perform.
Its newly developed magnet system drives a stiff and light magnesium diaphragm on a titanium voice coil former. A quality product made in Europe. 5kHz cone resonances are well beyond the 1kHz crossover frequency and are canceled by notch filters in the crossover network.
The magnesium cone is immune to cone break-ups/reflections in the 600-900Hz range. This results in lower distortion and a more linear frequency response. Thus, the second order harmonic distortion level measures far below the masking/perception threshold:
The level of third order harmonic distortion also remains extremely low and below perception level:
LINKWITZ 22MGs low distortion levels provide:
- greater accuracy
- improved clarity, especially in the human voice range
Power Handling IEC 268-5:
Short term 500W
Long term 200W
In Siegfried Linkwitz midrange distortion performance test a 800Hz sine is amplitude modulated by 80Hz i.o. to see harmonic and intermodulation distortion of the drivers. Top performer at 800Hz used to be SS21W
The new LINKWITZ 22MG with distortion products well below -60dB (0.1%)
The same test with at a different frequency: 150Hz sine is amplitude modulated by 15Hz i.o. to see harmonic and intermodulation distortion of the drivers. Top performer in Siegfried Linkwitz’ evaluation at 150Hz was the (small) 18cm driver SEAS W18EX, all harmonic distortion products below level of masking:
The new LINKWITZ 22MG at 150Hz offers harmonic distortion below masking as well:
Both, the 150Hz and the 800Hz measurements are relevant to judge a driver for the use in LX521.
Electric drive levels in LX521.4 @800Hz (compared to @150Hz) are ca 14dB lower.
At the same time we are much more sensitive to low order harmonic distortions at 800Hz (ca 20dB lower masking threshold compared to 150Hz). So, the 800Hz curve is quite important when judging a low distortion driver for LX521.4.