The discussion regarding speaker kill switches triggered an idea.

Whose volume or fader controls would you recommend for handing dividing
speaker output from what's basically a car head unit?

I've got a setup in a boat that has two speakers in the main cabin and two
in the forward cabin. They're both being driven by the 'Front' speaker
outputs from a Clarion head unit (radio). The rear line-out is fed to an
amp that powers the rear speakers out in the cockpit and radar arch. I'd
like to consider adding some speakers on the bow to give a bit of coverage
when at anchor without having to crank up the arch speakers. I'd also like
to be able to fade between the foward and main cabin speakers.

Output currently:
Head unit
|
+-- rear line-out -- amp -- rear speakers
|
+-- front speaker out --+--main cabin speakers
|
+--forward cabin speakers

I'm not planning on the bow speakers to be anything other than background
level sound. I don't expect they'd need amplification. If they did I'd
probably add a small amp for them as the existing amp doesn't have means to
support them.

The installation areas in a boat are more like a house, in that it's wood
bulkhead not automobile dashboard plastics.

Basically I want to accomplish two things, get some audio up on the bow and
be able to turn off the foward cabin speakers but leave the main cabin ones
on. I'm guessing this means a fader between the main and front, along with
a volume control for the bow. Something like this:

+-- front speaker out --+ +--main cabin speakers
| |
+---0 fader
| |
| +--forward cabin speakers
|
0 volume control
|
+---bow speakers

That look about right? I'd probably use units rated for outdoor use, but
they'd be mounted inside the main cabin.

So whose controls are worth considering?

Thanks,
-Bill Kearney

A simple potentiometer could be used to control the line-level signal going
to an amplifier (and then to speakers). I did this once in my car to
control the subwoofer volume. That was mono and you need stereo, of course,
so you will need a stereo pot, or you could just use two. I bought mine at
Radio Shack for something like $3. A stereo one would be a little more
expensive but a better way to go. Go to http://partsexpress.com/ as they
will have what you need. You basically just need a stereo line-level
attenuator between your HU and the amp that will drive these speakers. Just
split the signal that is going to that other amp to get the line-level
signal for the stereo attenuator and then you will have a volume control for
this new amp/speaker combination you want to add to your boat.

Hope that helps,

MOSFET

"Bill Kearney" wrote in message
t...
The discussion regarding speaker kill switches triggered an idea.

Whose volume or fader controls would you recommend for handing dividing
speaker output from what's basically a car head unit?

I've got a setup in a boat that has two speakers in the main cabin and two
in the forward cabin. They're both being driven by the 'Front' speaker
outputs from a Clarion head unit (radio). The rear line-out is fed to an
amp that powers the rear speakers out in the cockpit and radar arch. I'd
like to consider adding some speakers on the bow to give a bit of coverage
when at anchor without having to crank up the arch speakers. I'd also
like
to be able to fade between the foward and main cabin speakers.

Output currently:
Head unit
|
+-- rear line-out -- amp -- rear speakers
|
+-- front speaker out --+--main cabin speakers
|
+--forward cabin speakers

I'm not planning on the bow speakers to be anything other than background
level sound. I don't expect they'd need amplification. If they did I'd
probably add a small amp for them as the existing amp doesn't have means
to
support them.

The installation areas in a boat are more like a house, in that it's wood
bulkhead not automobile dashboard plastics.

Basically I want to accomplish two things, get some audio up on the bow
and
be able to turn off the foward cabin speakers but leave the main cabin
ones
on. I'm guessing this means a fader between the main and front, along
with
a volume control for the bow. Something like this:

+-- front speaker out --+ +--main cabin speakers
| |
+---0 fader
| |
| +--forward cabin speakers
|
0 volume control
|
+---bow speakers

That look about right? I'd probably use units rated for outdoor use, but
they'd be mounted inside the main cabin.

So whose controls are worth considering?

Thanks,
-Bill Kearney

Use Russound impedance matching volume controls. They'll need to be
protected to use them in a marine environment though. You might use
polyurethane or ACF-50 spray (try Sporty's Pilot Shop) to keep moisture out
of them.

--

Regards,
Robert L Bass

=============================
Bass Home Electronics
4883 Fallcrest Circle
Sarasota · Florida · 34233
941-866-1100 Sales & Tech Support
http://www.bassburglaralarms.com
=============================


The discussion regarding speaker kill switches triggered an idea.

Whose volume or fader controls would you recommend for handing dividing
speaker output from what's basically a car head unit?

I've got a setup in a boat that has two speakers in the main cabin and two
in the forward cabin. They're both being driven by the 'Front' speaker
outputs from a Clarion head unit (radio). The rear line-out is fed to an
amp that powers the rear speakers out in the cockpit and radar arch. I'd
like to consider adding some speakers on the bow to give a bit of coverage
when at anchor without having to crank up the arch speakers. I'd also
like
to be able to fade between the foward and main cabin speakers.

Output currently:
Head unit
|
+-- rear line-out -- amp -- rear speakers
|
+-- front speaker out --+--main cabin speakers
|
+--forward cabin speakers

I'm not planning on the bow speakers to be anything other than background
level sound. I don't expect they'd need amplification. If they did I'd
probably add a small amp for them as the existing amp doesn't have means
to
support them.

The installation areas in a boat are more like a house, in that it's wood
bulkhead not automobile dashboard plastics.

Basically I want to accomplish two things, get some audio up on the bow
and
be able to turn off the foward cabin speakers but leave the main cabin
ones
on. I'm guessing this means a fader between the main and front, along
with
a volume control for the bow. Something like this:

+-- front speaker out --+ +--main cabin speakers
| |
+---0 fader
| |
| +--forward cabin speakers
|
0 volume control
|
+---bow speakers

That look about right? I'd probably use units rated for outdoor use, but
they'd be mounted inside the main cabin.

So whose controls are worth considering?

Thanks,
-Bill Kearney