Sub questions
 

I have recently received a cheap Chinese Sub which was badly dinged up in
the delivery (thanks a bunch, DHL...) and another one is being sent for just
a tenner to cover the shipping charges. So I've taped this one up pro temps
and have had some noises out of it and will give it a good thrashing
shortly.

Anyway , the instructions are in German, so I've got some questions about
the connections, which look quite comprehensive - see:

http://www.apah69.dsl.pipex.com/keit.../subwoofer.jpg


I take it the 'Hi Level In' and 'Hi Level Out' is where the speaker output
wires from a stereo amp are routed for a normal 'sub/sat' stereo setup?
(amp - sub - speakers.)

What about the 'Line In' and 'Line Out' (which I have never seen before) - I
presume the single SW phono connection from the AV amp can go to either of
the Line In sockets and they are 'commoned', but what are the 'Line Out'
phono sockets for? What would you do with them? (OK, probably nothing for
normal use, but I'm curious....??) Finally the Phase Switch - I haven't
heard much difference with either setting yet. Is there a 'correct' setting?

TIA

Sub questions
 

Keith G wrote:

I have recently received a cheap Chinese Sub which was badly dinged up in
the delivery (thanks a bunch, DHL...) and another one is being sent for just
a tenner to cover the shipping charges. So I've taped this one up pro temps
and have had some noises out of it and will give it a good thrashing
shortly.

Anyway , the instructions are in German, so I've got some questions about
the connections, which look quite comprehensive - see:

http://www.apah69.dsl.pipex.com/keit.../subwoofer.jpg

I take it the 'Hi Level In' and 'Hi Level Out' is where the speaker output
wires from a stereo amp are routed for a normal 'sub/sat' stereo setup?
(amp - sub - speakers.)

Yes. I envisage the subwoofer would rely on the main amplifier power to
move the air, using only active circuitry to provide crossover and phase
adjustment.

What about the 'Line In' and 'Line Out' (which I have never seen before) - I
presume the single SW phono connection from the AV amp can go to either of
the Line In sockets and they are 'commoned', but what are the 'Line Out'
phono sockets for? What would you do with them? (OK, probably nothing for
normal use, but I'm curious....??) Finally the Phase Switch - I haven't
heard much difference with either setting yet. Is there a 'correct' setting?

The one that sounds the best.

The phono passthrough would be for you to insert the subwoofer between a
preamplifier and a power amplifier for the front speakers.

--
Now Playing: ListenToYaMother [128kbps mp3]

Sub questions
 

On Sat, 30 Oct 2004 02:30:15 +0100, nsj
wrote:

Keith G wrote:

I have recently received a cheap Chinese Sub which was badly dinged up in
the delivery (thanks a bunch, DHL...) and another one is being sent for just
a tenner to cover the shipping charges. So I've taped this one up pro temps
and have had some noises out of it and will give it a good thrashing
shortly.

Anyway , the instructions are in German, so I've got some questions about
the connections, which look quite comprehensive - see:

http://www.apah69.dsl.pipex.com/keit.../subwoofer.jpg

I take it the 'Hi Level In' and 'Hi Level Out' is where the speaker output
wires from a stereo amp are routed for a normal 'sub/sat' stereo setup?
(amp - sub - speakers.)

Yes. I envisage the subwoofer would rely on the main amplifier power to
move the air, using only active circuitry to provide crossover and phase
adjustment.

Not quite. The sub has its own power, those connections may provide
high-pass filtering for the main speakers, which are fed from the Hi
Level Out terminals.

What about the 'Line In' and 'Line Out' (which I have never seen before) - I
presume the single SW phono connection from the AV amp can go to either of
the Line In sockets and they are 'commoned', but what are the 'Line Out'
phono sockets for? What would you do with them? (OK, probably nothing for
normal use, but I'm curious....??) Finally the Phase Switch - I haven't
heard much difference with either setting yet. Is there a 'correct' setting?

The one that sounds the best.

The phono passthrough would be for you to insert the subwoofer between a
preamplifier and a power amplifier for the front speakers.

Quite so. There will be high-pass filtering to take the bass load off
the main speakers.
--

Stewart Pinkerton | Music is Art - Audio is Engineering

Sub questions
 

Keith G wrote:

I have recently received a cheap Chinese Sub which was badly dinged up in
the delivery (thanks a bunch, DHL...) and another one is being sent for just
a tenner to cover the shipping charges. So I've taped this one up pro temps
and have had some noises out of it and will give it a good thrashing
shortly.

Anyway , the instructions are in German, so I've got some questions about
the connections, which look quite comprehensive - see:

http://www.apah69.dsl.pipex.com/keit.../subwoofer.jpg

Hmm, the back of your sub looks like mine, but with better speaker terminals.
Though I can't really complain for £40!



I take it the 'Hi Level In' and 'Hi Level Out' is where the speaker output
wires from a stereo amp are routed for a normal 'sub/sat' stereo setup?
(amp - sub - speakers.)

Yes. The speaker wires from the terminals on the amp go to 'Hi Level In' and the
speaker wires from the 'Hi Level Out' go to the terminals on the satellite speakers.


What about the 'Line In' and 'Line Out' (which I have never seen before) - I
presume the single SW phono connection from the AV amp can go to either of
the Line In sockets and they are 'commoned', but what are the 'Line Out'
phono sockets for?

possibly a connection to the power amp, if the pre-amp only has one 'pre-out'
socket?



Finally the Phase Switch - I haven't
heard much difference with either setting yet. Is there a 'correct' setting?


I haven't heard a difference in mine either. I believe it depends on your
listening room condition and the distance between the sub and satellite speakers.

I have a M&K sub manual and this is what they say about phase

"the phasing test ensures optimum sound in the critical bass frequencies where
your sub and sats overlap.

Play a familiar CD/LP with steady consistent bass. Listen carefully to the
mid-bass (75 - 125Hz) region - the part of the specturm where electric or string
basses and drums are found. Move the phase switch to the opposite direction. Now
listen to the same musical passage again. If you hear less bass, the original
connections were correct. If you hear more bass, the new connections are correct"

Sub questions
 

"nsj" wrote in message
...
Keith G wrote:

I have recently received a cheap Chinese Sub which was badly dinged up in
the delivery (thanks a bunch, DHL...) and another one is being sent for
just a tenner to cover the shipping charges. So I've taped this one up
pro temps and have had some noises out of it and will give it a good
thrashing shortly.

Anyway , the instructions are in German, so I've got some questions about
the connections, which look quite comprehensive - see:

http://www.apah69.dsl.pipex.com/keit.../subwoofer.jpg

I take it the 'Hi Level In' and 'Hi Level Out' is where the speaker
output wires from a stereo amp are routed for a normal 'sub/sat' stereo
setup? (amp - sub - speakers.)

Yes. I envisage the subwoofer would rely on the main amplifier power to
move the air, using only active circuitry to provide crossover and phase
adjustment.



Hmmmm, that ain't right - the only amp 'moving the air' with the sub's
driver is the sub's own, but I'm OK with the aspect of the sub's functions.


What about the 'Line In' and 'Line Out' (which I have never seen
before) - I presume the single SW phono connection from the AV amp can go
to either of the Line In sockets and they are 'commoned', but what are
the 'Line Out' phono sockets for? What would you do with them? (OK,
probably nothing for normal use, but I'm curious....??) Finally the Phase
Switch - I haven't heard much difference with either setting yet. Is
there a 'correct' setting?

The one that sounds the best.


Yep. Thought so.


The phono passthrough would be for you to insert the subwoofer between a
preamplifier and a power amplifier for the front speakers.


OK. Interesting.

Used the sub (with the split seams taped up - the cabinet really is poop)
watching 'The Shpping News' late last night and it wasn't half bad! There
was a bit of a clattering from time to time as there is obviously summat
busted inside (the 'Hi Level Out' speaker terminals can be sprung in and out
with fingertip pressure). Easily worth the money for someone on a budget and
not really sounding much different to the *many times* (5 ?) more expensive
Mission that I tried.

(The question is, could you get one shipped to your house without it being
wrecked?)

Sub questions
 

"Tat Chan" wrote in message
...
Keith G wrote:

I have recently received a cheap Chinese Sub which was badly dinged up in
the delivery (thanks a bunch, DHL...) and another one is being sent for
just a tenner to cover the shipping charges. So I've taped this one up
pro temps and have had some noises out of it and will give it a good
thrashing shortly.

Anyway , the instructions are in German, so I've got some questions about
the connections, which look quite comprehensive - see:

http://www.apah69.dsl.pipex.com/keit.../subwoofer.jpg

Hmm, the back of your sub looks like mine, but with better speaker
terminals. Though I can't really complain for £40!


Absolutely, provided it hasn't been damaged in transit!




I take it the 'Hi Level In' and 'Hi Level Out' is where the speaker
output wires from a stereo amp are routed for a normal 'sub/sat' stereo
setup? (amp - sub - speakers.)

Yes. The speaker wires from the terminals on the amp go to 'Hi Level In'
and the speaker wires from the 'Hi Level Out' go to the terminals on the
satellite speakers.


Yes, I'm happy with that and looking forward to trying on audio kit when the
replacement arrives. (I'm getting to keep the damaged one for effectively a
tenner! - Can't fault the eBay seller for that!! :-)



What about the 'Line In' and 'Line Out' (which I have never seen
before) - I presume the single SW phono connection from the AV amp can go
to either of the Line In sockets and they are 'commoned', but what are
the 'Line Out' phono sockets for?

possibly a connection to the power amp, if the pre-amp only has one
'pre-out' socket?


Yes, as 'nsj' has suggested also.




Finally the Phase Switch - I haven't heard much difference with either
setting yet. Is there a 'correct' setting?


I haven't heard a difference in mine either. I believe it depends on your
listening room condition and the distance between the sub and satellite
speakers.


Yep - make that I've heard *no* difference myself yet, either....



I have a M&K sub manual and this is what they say about phase

"the phasing test ensures optimum sound in the critical bass frequencies
where your sub and sats overlap.

Play a familiar CD/LP with steady consistent bass. Listen carefully to the
mid-bass (75 - 125Hz) region - the part of the specturm where electric or
string basses and drums are found. Move the phase switch to the opposite
direction. Now listen to the same musical passage again. If you hear less
bass, the original connections were correct. If you hear more bass, the
new connections are correct"


Excellent - I'll play about with it a bit more.

Many thanks to you both.

Sub questions
 

Stewart Pinkerton wrote:

On Sat, 30 Oct 2004 02:30:15 +0100, nsj
wrote:

Keith G wrote:

I take it the 'Hi Level In' and 'Hi Level Out' is where the speaker output
wires from a stereo amp are routed for a normal 'sub/sat' stereo setup?
(amp - sub - speakers.)

Yes. I envisage the subwoofer would rely on the main amplifier power to
move the air, using only active circuitry to provide crossover and phase
adjustment.

Not quite. The sub has its own power, those connections may provide
high-pass filtering for the main speakers, which are fed from the Hi
Level Out terminals.

I don't think I was being clear enough. This would most likely be the case
if the high level in/out was used, with the internal amplification only
being used when the equipment was supplied with a line-level input.

--
Now Playing: Coldplay - Trouble [161kbps mp3]

Sub questions
 

Hi,

In message , nsj
writes
Stewart Pinkerton wrote:

On Sat, 30 Oct 2004 02:30:15 +0100, nsj
wrote:

Keith G wrote:

I take it the 'Hi Level In' and 'Hi Level Out' is where the speaker
output wires from a stereo amp are routed for a normal 'sub/sat'
stereo setup? (amp - sub - speakers.)

Yes. I envisage the subwoofer would rely on the main amplifier power
to move the air, using only active circuitry to provide crossover and
phase adjustment.
Not quite. The sub has its own power, those connections may provide
high-pass filtering for the main speakers, which are fed from the Hi
Level Out terminals.

I don't think I was being clear enough. This would most likely be the
case if the high level in/out was used, with the internal amplification
only being used when the equipment was supplied with a line-level input.

I'm not aware of any subs that do this, but I suppose it could happen.
In the designs I'm familiar with, the speaker level input is filtered
and split. Then one side of the split signal is sent to the high level
outputs to go to the main (LR) speakers, and the other side is
attenuated and fed to the onboard sub amplifier.

--
Regards,
Glenn Booth

Sub questions
 

More likely is that the, line-in line-out, is just a link through so you can
feed more than one "sub" daisy chain mode

Chris W

"nsj" wrote in message
...
Stewart Pinkerton wrote:

On Sat, 30 Oct 2004 02:30:15 +0100, nsj
wrote:

Keith G wrote:

I take it the 'Hi Level In' and 'Hi Level Out' is where the speaker
output
wires from a stereo amp are routed for a normal 'sub/sat' stereo setup?
(amp - sub - speakers.)

Yes. I envisage the subwoofer would rely on the main amplifier power to
move the air, using only active circuitry to provide crossover and phase
adjustment.

Not quite. The sub has its own power, those connections may provide
high-pass filtering for the main speakers, which are fed from the Hi
Level Out terminals.

I don't think I was being clear enough. This would most likely be the
case
if the high level in/out was used, with the internal amplification only
being used when the equipment was supplied with a line-level input.

--
Now Playing: Coldplay - Trouble [161kbps mp3]

Sub questions
 

"chris" wrote in message
...
More likely is that the, line-in line-out, is just a link through so you
can
feed more than one "sub" daisy chain mode


Interesting.

If/when the second (replacement) sub arrives I will be able to check that
out.....