Question:
Alright, my amp is the Yamaha DSP-AX620. All my speakers are Mordaunt-Short, the Subwoofer is the Mordaunt Short MSW20. Now out the back of the amp, is the sub woofer output jack, which is one just one jack for a long lead by phono plug, might be coaxial, not too experienced at seeing the differences, well this is connected to the subwoofer output R. And I've been playinf DVDs for half a year now, great bass with explosions, great effect in the room etc, just a little paranoid, it could be better, or wanting to know I'm not connected fully, I feel I'm doing it wrong because I've connected output subwoofer jack to the output R (redcoloured) jack, and you know you got L white output there, and input R, input L. Now the manual says connect the input jack of the subwoofer system to the amp subwoofer output jack. But as the output jack of Yamaha amp is just for one lead, to one input lead connection, is it correct I've put it in the R output jack of the sub woofer?
Making it clear once more, my amp subwoofer jack is connected by one lead my phono or coaxial/gold tinted, to the actual subwoofer, to the OUTPUT R jack
There are also different input and output for separate R and L wiring, which can't be for my amp, as only one subwoofer output on the amp.
Anyone else wish to share their subwoofer connection experiences, and maybe see if I'm right or wrong, it's not me who actually set it up, but my brother, and he talked to the guys where he purchases everything etc, so just wanted to see if its correct, am I getting the best out of it, etc.
Its ok, I've found out the answer from a Richard H in another forum, just in case anyone wants to know how my confusion was sorted out:
RichardH on Sunday, 28th July 2002, 09:11
Yes, you're fine.
The inputs you are using are called "low level" - i.e. the singal arrives at the sub unamplified, leaving the sub to do the amplification. Some subs have two of these inputs, and I believe you can get a cable that splits the single phono lead into two. (Strictly speaking a coaxial lead is a digital lead, rather than an analogue one, but they look the same from the outside!!). Some say the split lead helps improve the bass - the IXOS 1009-YF is such a splitter cable, which could be added on to the end of your existing cable.
The input and output for separate R and L wiring are "high level inputs" - the already amplified signals on their way to the front speakers are passed through the sub, the sub's crossover filters out the low level information and reproduces that, and leaves the higher level stuff to go off to the speakers. That's what the crossover/rolloff knob on the sub is for - to govern the frequency of cutoff between sub and mains.
If you are using the sub for 5.1, then the seperate .1 soundtrack is sent direct to the sub via the lead you have connected, so all is fine and dandy.
Hi
I have a 620 and have just purchased a subwoofer. I have it connected via a single phono lead. The problem is that the amp
appears to be sending a loud hum to the sub. When the sub is first powered up there is a nice quiet hum, but as soon as the amp is switched on there is a very loud audible hum even at volume levels of 3/4 on the sub.
As you are a fellow amp owner with a sub connected the same way, did you experience any similar problems. Have I set it up wrong, or do I have a faulty amp/sub.
Thanks
Originally posted by fuzzball
Hi
I have a 620 and have just purchased a subwoofer. I have it connected via a single phono lead. The problem is that the amp
appears to be sending a loud hum to the sub. When the sub is first powered up there is a nice quiet hum, but as soon as the amp is switched on there is a very loud audible hum even at volume levels of 3/4 on the sub.
As you are a fellow amp owner with a sub connected the same way, did you experience any similar problems. Have I set it up wrong, or do I have a faulty amp/sub.
Thanks
Sounds like an earth loop.
It might be worth trying the sub and amp plugged into the same mains socket, but I'm sure there are others with better advice (I'm not too strong on this electrical stuff, but I had an earth loop in the past).
Thanks Warren
At the moment I have both the amp and the sub going into a 4 way extension lead which feeds into the same mains socket. Does this mean that it is a different problem.
Do you have any more info on what an earth loop is?
Hmmm... You know, since I swapped out for a Yammy630 (from an A592) my sub has been humming a little too. Even when the amp is 'off' it seems to do it. Everything's plugged in where it was...
Any thoughts?
Originally posted by SeanValen
(Strictly speaking a coaxial lead is a digital lead, rather than an analogue one, but they look the same from the outside!!).
Rubbish. Coaxial refers to the cable construction and has nothing to do with digital / analogue.
I suspect if you try a cable splitter ( 1fm-2m ) to feed a second input signal into the speaker then the subwoofer will take on a more lively sound.
Sean,
You might find this prior thread of interest
http://Here.com/forums/showthread.php?s=&threadid=186045
Anybody know where i could get a Y splitter cable?
Sure I heard someplace to use a bit of wire from the amp to the sub ... just unscrew a screw someplace and wrap it round on each ... worth a try ;) It'll probably tie the earths together nicely
Making it clear once more, my amp subwoofer jack is connected by one lead my phono or coaxial/gold tinted, to the actual subwoofer, to the OUTPUT R jack
There are also different input and output for separate R and L wiring, which can't be for my amp, as only one subwoofer output on the amp.
Anyone else wish to share their subwoofer connection experiences, and maybe see if I'm right or wrong, it's not me who actually set it up, but my brother, and he talked to the guys where he purchases everything etc, so just wanted to see if its correct, am I getting the best out of it, etc.
Answers:
Its ok, I've found out the answer from a Richard H in another forum, just in case anyone wants to know how my confusion was sorted out:
RichardH on Sunday, 28th July 2002, 09:11
Yes, you're fine.
The inputs you are using are called "low level" - i.e. the singal arrives at the sub unamplified, leaving the sub to do the amplification. Some subs have two of these inputs, and I believe you can get a cable that splits the single phono lead into two. (Strictly speaking a coaxial lead is a digital lead, rather than an analogue one, but they look the same from the outside!!). Some say the split lead helps improve the bass - the IXOS 1009-YF is such a splitter cable, which could be added on to the end of your existing cable.
The input and output for separate R and L wiring are "high level inputs" - the already amplified signals on their way to the front speakers are passed through the sub, the sub's crossover filters out the low level information and reproduces that, and leaves the higher level stuff to go off to the speakers. That's what the crossover/rolloff knob on the sub is for - to govern the frequency of cutoff between sub and mains.
If you are using the sub for 5.1, then the seperate .1 soundtrack is sent direct to the sub via the lead you have connected, so all is fine and dandy.
Answers:
Hi
I have a 620 and have just purchased a subwoofer. I have it connected via a single phono lead. The problem is that the amp
appears to be sending a loud hum to the sub. When the sub is first powered up there is a nice quiet hum, but as soon as the amp is switched on there is a very loud audible hum even at volume levels of 3/4 on the sub.
As you are a fellow amp owner with a sub connected the same way, did you experience any similar problems. Have I set it up wrong, or do I have a faulty amp/sub.
Thanks
Answers:
Originally posted by fuzzball
Hi
I have a 620 and have just purchased a subwoofer. I have it connected via a single phono lead. The problem is that the amp
appears to be sending a loud hum to the sub. When the sub is first powered up there is a nice quiet hum, but as soon as the amp is switched on there is a very loud audible hum even at volume levels of 3/4 on the sub.
As you are a fellow amp owner with a sub connected the same way, did you experience any similar problems. Have I set it up wrong, or do I have a faulty amp/sub.
Thanks
Sounds like an earth loop.
It might be worth trying the sub and amp plugged into the same mains socket, but I'm sure there are others with better advice (I'm not too strong on this electrical stuff, but I had an earth loop in the past).
Answers:
Thanks Warren
At the moment I have both the amp and the sub going into a 4 way extension lead which feeds into the same mains socket. Does this mean that it is a different problem.
Do you have any more info on what an earth loop is?
Answers:
Hmmm... You know, since I swapped out for a Yammy630 (from an A592) my sub has been humming a little too. Even when the amp is 'off' it seems to do it. Everything's plugged in where it was...
Any thoughts?
Answers:
Originally posted by SeanValen
(Strictly speaking a coaxial lead is a digital lead, rather than an analogue one, but they look the same from the outside!!).
Rubbish. Coaxial refers to the cable construction and has nothing to do with digital / analogue.
I suspect if you try a cable splitter ( 1fm-2m ) to feed a second input signal into the speaker then the subwoofer will take on a more lively sound.
Answers:
Sean,
You might find this prior thread of interest
http://Here.com/forums/showthread.php?s=&threadid=186045
Answers:
Anybody know where i could get a Y splitter cable?
Answers:
Sure I heard someplace to use a bit of wire from the amp to the sub ... just unscrew a screw someplace and wrap it round on each ... worth a try ;) It'll probably tie the earths together nicely
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