Sorry but Denon DL-103 is very low compliance cartridge, so you need a heavy tonearm with high effective mass if you want to hear the music in a good way with dl-103. Technics stock tonearm is the worst tonearm for this cartridge, a total mismatch as it's lightweight arm for high compliance cartridges!
If you like 103 series try model 103D (higher compliance).
Or change stock tonearm to Jelco to use with dl-103 (103R is better).
For denon mc cartridges you will need step-up transformer desidged for them.
If you don't want to change stock arm use high compliance cartridges.
I HOPE INFORMATION BELOW WILL HELP:
Tonearm / Cartridge
* A tonearm whose effective mass is rated at 10 grams or below is considered low mass (e.g. early SMEs, Grace 747 etc.)
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).
* A phono cartridge whose compliance is rated at 12 x l0ˉ6 or below, is considered low compliance.
A cartridge whose compliance is rated between 13 x l0ˉ6 and 25 x l0ˉ6 is considered high to very high.
Note: Another way of expressing compliance is um/mN. Here a rating of 5 to 10 is considered very low, 10 to 20 is moderate and above 35 is very high.
* 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. Mistracking 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.
If you like 103 series try model 103D (higher compliance).
Or change stock tonearm to Jelco to use with dl-103 (103R is better).
For denon mc cartridges you will need step-up transformer desidged for them.
If you don't want to change stock arm use high compliance cartridges.
I HOPE INFORMATION BELOW WILL HELP:
Tonearm / Cartridge
* A tonearm whose effective mass is rated at 10 grams or below is considered low mass (e.g. early SMEs, Grace 747 etc.)
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).
* A phono cartridge whose compliance is rated at 12 x l0ˉ6 or below, is considered low compliance.
A cartridge whose compliance is rated between 13 x l0ˉ6 and 25 x l0ˉ6 is considered high to very high.
Note: Another way of expressing compliance is um/mN. Here a rating of 5 to 10 is considered very low, 10 to 20 is moderate and above 35 is very high.
* 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. Mistracking 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.