I have a Marantz NR1606 that is 6 years old. All of a sudden the subwoofer does not receive a signal from the amp. I have checked the setup and all speakers get the soft noise, except the subwoofer.

SOURCE: Subwoofer will not work when connected

cheak setting in sterio out put for sub on ect does woofer have sperk wire going in and out use them then ok

Posted on Feb 11, 2008

SOURCE: The subwoofer is not working on our Bose 5.1 surround speakers.

First of all you should never indicate speakers as Large unless they can produce below 20Hz (which is very low), otherwise always set your speakers to Small.

Second, did you also indicate in teh setupmenu that you have a subwoofer? Because if all speakers are set to Large some receivers will omit a subwoofer because Large indicates the speakers can reproduce all sounds even below 20Hz.

So walk through your setup menu, say YES when the sub (SFW) is asked for and that should do the trick.

Posted on Apr 17, 2009

SOURCE: Marantz SR-18EX; Front left channel crackles

The f-l channel of the sr18, & sr18ex & sr19 is a common failure location due to the heating and cooling over the years. The crackling an/or distortion, is most commonly due to the amplifier going into a high idle, or d.c. offset that can no longer be controlled by the adjustment potentiometers on the board. usually the two 2sc3200 transistors become unstable, and as well a 47mfd and a 470 mfd elect. caps nearby. Also distortion is caused by one or more of the zener and germanium diodes all grouped near the big dual ceramic white resistor. The amp block is held in by six screws. first remove the cross bracket, then cut the cable tie free from the hole on the board. Ten screws hold the top board on, the pull the boards apart from the connectors. before replacing it, resolder ALL of the connector pins to BOTH boards.

Posted on May 27, 2009

SOURCE: Loud buzzing from Kef PSW1000 Subwoofer

yes. A good idea. Kill power to the sub, then unplug and remove everything from the sub. go ahead and plug it in again and check for buzzzz.
That is test one. if you have buzz still, its the sub assembly. bad luck, but not impossible. If the buzz is gone its one of the signals to the sub. They can produce a buzzz without any signal coming from your stereo equipment. Replace the feed line, enjoy! BTW...Kef sure does sound clean. good choice.

Posted on Nov 09, 2009

SOURCE: Constant noise from Mirage NanoSat 5.1 System Subwoofer

sounds like an earth fault either with the plug circut or more likely with the power board of the unit.

Posted on Jan 06, 2010