AV2 and sub woofer and radio interefernce
Posted by: webrat11 on 02 December 2003
Can anyone help with this problem please.
I have a MJ Acoustics Reference 100 sub-woofer in my Naim AV system. It is attached to the AV2 processor high quality QED sub woofer cable into the dedicated sub-woofer output.
The problem is that if I set the frequency contour on the woofer to LFE I get a pronounced (loud) hum when the Low Level Gain is set to about 10'o'clock onwards (1/3rds). At about 2'o'clock onwards (2/3rds) I am getting some sort of radio reception! (sounds foreign - could be short wave?). I have always had some hum but have only just started hearing the radio reception. If I manually set the crossover I get significantly less hum and no radio reception but I need a much higher gain to get the same level of bass
extension.
I really want to set the woofer to LFE but how do I eliminate the hum and radio intereference? Any and all ideas welcomed? WHy do I get interference only when the woofer is set to LFE?
If I unplug the cable from the Naim AV2 the sub-woofer is quiet so I presume the AV is generating the signal and it is not therefore a sub-woofer fault or the cable acting as an ariel.
TIA. Ian
Naim AV2
Naim NAPV175
Naim NAP180
Naim NAP140
2 pairs Kef 104/2s
1 pair Kef 2QDs
Harmon Kardon DVD30
Panny 6.
I have a MJ Acoustics Reference 100 sub-woofer in my Naim AV system. It is attached to the AV2 processor high quality QED sub woofer cable into the dedicated sub-woofer output.
The problem is that if I set the frequency contour on the woofer to LFE I get a pronounced (loud) hum when the Low Level Gain is set to about 10'o'clock onwards (1/3rds). At about 2'o'clock onwards (2/3rds) I am getting some sort of radio reception! (sounds foreign - could be short wave?). I have always had some hum but have only just started hearing the radio reception. If I manually set the crossover I get significantly less hum and no radio reception but I need a much higher gain to get the same level of bass
extension.
I really want to set the woofer to LFE but how do I eliminate the hum and radio intereference? Any and all ideas welcomed? WHy do I get interference only when the woofer is set to LFE?
If I unplug the cable from the Naim AV2 the sub-woofer is quiet so I presume the AV is generating the signal and it is not therefore a sub-woofer fault or the cable acting as an ariel.
TIA. Ian
Naim AV2
Naim NAPV175
Naim NAP180
Naim NAP140
2 pairs Kef 104/2s
1 pair Kef 2QDs
Harmon Kardon DVD30
Panny 6.