Cartridge compliance-Compliance up to 10 µm/mN (or CU, compliance unit, or equal amount x 10-6cm/dyne) is considered low. -Compliance in the range of 10 to 20 µm/mN is moderate. -Compliance in the range of 20 to 35 µm/mN is high. -Compliance value above 35 µm/mN is very high.Effective (dynamic) mass of the tonearm-Low mass arms* mate well with both moderately high and very high compliance phono cartridges. *A tonearm whose effective mass is rated at 10 grams or below is considered low mass (e.g. early SME’s, Grace 747).-Moderate mass arms** are good companions for moderate to low compliance cartridges. **A tonearm whose effective mass is rated between 11 and 25 grams is considered moderate mass (e.g. SME 309, IV, IV-VI, V, Triplanar, Graham). Arms above 25 grams of mass are high mass in nature (Eminent Technology, Dynavector).
Kompilijansa Decce je 10 sto je na gornjoj granici low compilijance a Koetcu je kompilijansa 5 . Jasno vam je koje masse rucke su tu pozeljne.
Low mass arms mate well with both moderately high and very high compliance phono cartridges.
* Moderate mass tonearms are good companions for moderate to low compliance cartridges.
* If a low compliance cartridge is used with a low mass tonearm, undesirable resonances can occur in the audible range. Mis-tracking may also be a problem.
* When a high compliance cartridge is mated with a moderate mass tonearm, resonances in the infrasonic range may occur in addition to some unwanted high frequency damping.
To je neka opsta teorija koja je tacna ali u praksi ima svasta.
Jelacic je pravio ako se nevaram low mass rucke. Evo postavicu i kako se racuna effective mass i ostalo.