09-06-12: Johnnyb53
09-05-12: Tbromgard
I think Johnnyb53 is correct. If the Denon is that light you could have compliance issues.
I may have overstated the difference a bit. The DL103 is spec'd at 8.5g; the Zu
103 at 14g. Still, 5.5g is significant, especially when we're dealing with a
compliance rating of 5 at 100 Hz. With the Zu103, if you have a 12g effective
mass tonearm and a 14g cartridge plus .5g mounting hardware, you're at
nearly 27g total effective mass which is an advantage over the stock cartridge.
I've read somewhere that Denon's rating at 100 Hz may not be equivalent to
other cart vendors who specify at 1000 Hz. By that standard, the DL103 may
have a compliance of more like 7 or 8, maybe even 10.
Even with that consideration, if you look at this cartridge compatibility chart, it's a challenge to get a DL 103 at 8.5g on a 12g arm to get into the green area.
I'm pretty sure that if the compliance of the cartridge is too stiff relative to the
arm's effective mass, you won't get much bass response.
I'm not sure why some Japanese cartridge makers specify compliance at 100Hz, because the frequencies of interest are around 7-14Hz - ie where we want resonance to occur.
The more useful 10Hz (not 1000 as you stated) is more often specified by other cartridge manufacturers.
Empirically I have found (with the HFN test record) that the stock 103R has resonance around 11Hz in a 12g effective mass arm (Graham 1.5T) - which indeed indicates a compliance close to 10cu.
That is the stock cartridge.
My 14.5g re-bodied 103R has a resonance closer to 7Hz in my Graham Phantom tonearm - which is actually getting on the low side - though it tracks beautifully and no misbehavior is evident with warps etc. Higher mass arms may make the resonant frequency of the heavy modded cartridge undesirably low - ie close to footfall and record warp frequencies.
YMMV, but my experience is that the compliance compatibility issues with the 103 cartridges are hugely overstated. Lower quality arms may have issues dealing with the energy from the cartridge perhaps.