A B727 FREIGHTER CAPT RPTS THAT HE MAY HAVE RECEIVED; AND A DC-8 FREIGHTER CREW DID RECEIVE; AN APCH CLRNC FROM DEN TRACON THAT WAS VERY DIFFICULT TO COMPLY WITH. HAD THE RPTR FLOWN THIS CLRNC; HE WOULD HAVE HAD TO VIOLATE HIS ACR PROCS FOR A STABILIZED IFR APCH. WX FACTORS LOW CEILING WITH GOOD VISIBILITY. NIGHT OP.

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(ILS RWY 35L DEN). CLRNC FOR ACFT AHEAD OF US; A DC8; WAS TO MAINTAIN 7500 FT MSL TO 'DYMON' INTXN. THE GS INTERCEPT AT DYMON IS 7000 FT MSL. THIS SET UP AN UNSTABLE APCH FOR THIS ACFT. OUR CLRNC WAS TO MAINTAIN 170 KTS TO DYMON; I AM UNSURE IF WE WERE GIVEN THE 7500 FT RESTR AS WELL. THE DC8 COMPLAINED ABOUT THE PROC TO THE CTLR. WE LOCKED ONTO THE GS AS WE WERE CLRED FOR THE APCH. THE CTRL SAID NOTHING TO US. DYMON (FAF) IS ONLY 4.5 MI FROM RWY. IT COULD NOT BE LEGAL TO ASK A DC8 AND B727 TO CROSS IT AT 170 KTS AND 500 FT ABOVE GS. THIS PROC NEEDS TO BE LOOKED INTO. BOTH ACFT GIVEN THE SAME BAD CLRNC! SO IT MUST BE A MISUNDERSTANDING BY THE CTLRS! CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR DROVE TO THE HOTEL WITH THE CREW OF THE DC8. THE DC8 CREW CALLED DEN TRACON BUT GOT NO SATISFACTORY EXPLANATION OF WHY THEY WERE GIVEN THE ALT RESTR. THE TRACON CTLR MADE A REMARK ABOUT AN UNDERLYING AIRSPACE RESTR; BUT THE CLASS B AIRSPACE CHART SHOWS THE FLOOR AS THE SURFACE IN THE VICINITY OF 'DYMON.' THE RPTR IS NOT SURE IF HE GOT A RESTR ALT CLRNC ON HIS APCH. HE POINTS OUT THAT IT IS ILLEGAL FOR HIM TO ACCEPT THIS CLRNC AS HIS OPERATING MANUAL REQUIRED HIM TO BE CONFIGURED FOR LNDG AND AT SPD AT THE FAF OR GS INTERCEPT. THE RPTR GOT NO CHANGE IN CLRNC AFTER TRACON ASKED IF HE WAS ON THE GS. THE RPTR UNDERSTANDS THAT THERE HAVE BEEN MANY NOISE COMPLAINTS FROM PEOPLE LIVING AROUND THE NEW DEN ARPT AND THAT THIS MAY BE THE CAUSE OF HIGH ALT OVER 'DYMON.'