Connecting subwoofers to a 2-channel audio amp.

Hi guys,

I was recently caught up with a friend who is planning to upgrade his
main speakers to one with responses between 20Hz-20KHz.

I was told that one of the sales guys mentioned an alternative - Buy a
good pair subwoofers to support the pair of lovely Whatmough (40
HZ-20KHz) mains my friend already has.

I was wondering how could subwoofers be connected to a two channel amp
as it is primarily a 5-channel equipment. The amp is a 20yrs old denon
with phono inputs, CD direct etc.

Is this sales guy just bull-****ting or can this really be done?

cheers

Max

"max graff" wrote in message
ups.com...


** Groper from Hell alert !


I was recently caught up with a friend who is planning to upgrade his
main speakers to one with responses between 20Hz-20KHz.

I was told that one of the sales guys mentioned an alternative - Buy a
good pair subwoofers to support the pair of lovely Whatmough (40
HZ-20KHz) mains my friend already has.

I was wondering how could subwoofers be connected to a two channel amp
as it is primarily a 5-channel equipment. The amp is a 20yrs old denon
with phono inputs, CD direct etc.

Is this sales guy just bull-****ting or can this really be done?



** So you have never heard of an "active" sub woofer ??

Use Google - there are hundreds of them on the market.,




....... Phil

Phil Alison wrote:

I was wondering how could subwoofers be connected to a two channel
amp
as it is primarily a 5-channel equipment. The amp is a 20yrs old
denon
with phono inputs, CD direct etc.

Is this sales guy just bull-****ting or can this really be done?

** So you have never heard of an "active" sub woofer ??

Needs line level output/s from the amp? Maybe not got?

Ian

"Phil Allison" wrote in message
...

"max graff" wrote in message
ups.com...


** Groper from Hell alert !


I was recently caught up with a friend who is planning to upgrade
his
main speakers to one with responses between 20Hz-20KHz.

I was told that one of the sales guys mentioned an alternative -
Buy a
good pair subwoofers to support the pair of lovely Whatmough (40
HZ-20KHz) mains my friend already has.


Use Google - there are hundreds of them on the market.,




...... Phil

"Ian Iveson the ****ing Idiot "



Needs line level output/s from the amp? Maybe not got?


** Speaker level is provided for in nearly all cases.





........ Phil

Hi Phil,

Yes I am aware of 'active' subbys and have a couple at my place.Al of
them however have been connected to my Marantz 6.1 integrated amp .

In my friend's case the only two speaker outputs are left and right.
Hence my question how do I get subbys to work on a two channel amp.

Cheers

Max

"max graff" wrote in message
oups.com...


** Groper with NO USENET CLUE alert !



Yes I am aware of 'active' subbys and have a couple at my place.Al of
them however have been connected to my Marantz 6.1 integrated amp .

In my friend's case the only two speaker outputs are left and right.
Hence my question how do I get subbys to work on a two channel amp.



** You connect them as shown in the operator's manual !!!!

Could be linked by RCA leads to the pre-amp outputs on the amp or via the
speaker outputs.

Commonly, active subs are simply linked with short wires to the existing
speakers.


BTW:


Do NOT post in "mid air" like this !!!!!!!!!!!!!!!!!!!!

ALWAYS quote the post and poster you are responding to.




........ Phil

max graff wrote:

Hi Phil,

Yes I am aware of 'active' subbys and have a couple at my place.Al of
them however have been connected to my Marantz 6.1 integrated amp .

In my friend's case the only two speaker outputs are left and right.
Hence my question how do I get subbys to work on a two channel amp.

Connect them to the two channels !

Graham

Eeyore wrote:
max graff wrote:

Hi Phil,

Yes I am aware of 'active' subbys and have a couple at my place.Al of
them however have been connected to my Marantz 6.1 integrated amp .

In my friend's case the only two speaker outputs are left and right.
Hence my question how do I get subbys to work on a two channel amp.

Connect them to the two channels !

Graham

Graham,

You mean in series with the mains?

max graff wrote:

Eeyore wrote:
max graff wrote:

Hi Phil,

Yes I am aware of 'active' subbys and have a couple at my place.Al of
them however have been connected to my Marantz 6.1 integrated amp .

In my friend's case the only two speaker outputs are left and right.
Hence my question how do I get subbys to work on a two channel amp.

Connect them to the two channels !

Graham

Graham,

You mean in series with the mains?

They would go in parallel but you need a crossover somewhere too.

I suggest you listen to the nice man in the shop. He seems to know what he's
talkking about.

Graham

On 11 Jan 2007 23:30:11 -0800, "max graff" wrote:


Eeyore wrote:
max graff wrote:

Hi Phil,

Yes I am aware of 'active' subbys and have a couple at my place.Al of
them however have been connected to my Marantz 6.1 integrated amp .

In my friend's case the only two speaker outputs are left and right.
Hence my question how do I get subbys to work on a two channel amp.

Connect them to the two channels !

Graham

Graham,

You mean in series with the mains?

Not exactly. What your friend needs is 1 or 2 subs with a
speaker-level crossover. Then, he can connect the main amp outputs to
the sub(s) and then connect the main L/R speakers to the crossover
outputs on the subs. Thus, the crossovers will divide the frequency
spectrum appropriately.

For this, I prefer powered (built-in amp) subs so that they do not
draw any significant power from the main amp. Whether he needs one or
two depends on how low he can make the crossover and his room
arrangement/acoustics. Most can do just fine with one better sub than
two cheaper ones. I personally recommend those with equalization to
compensate somewhat for room modes.

Kal