Volume Control

[mbkowns]

I would like to control the volume directly on the AMP9. I have some questions to get this to work like I want.

Where should I were the volume control? Output side or the Input side?
I potentiometer (pot) installed on mine and I need to figure out a good one to get... which one should i get for a

single channel input and a 2 channel mirrored output

L R in 4x100 out

thanks

-MBK (AIM=illmbklli)

[V-bro]

Place it on the LR inputs, a simple 50 or 100K pot will do...

The 'outer' pins on the pot on ground and source line output. The 'wiper' or 'centre pin' on the amp input. Amp ground to sourceground.

You can simply copy what they did on the SI T-amp, use google...

Only you split the LR 'output' of the pot to four inputs on the amp.

Do I smell a bi-amping plan being brewed here?

------X-max. can be several meters on any driver, too bad it can be done only once...------

[mbkowns]

I want to do 1 set of inputs to 2 pair of outputs

1 x L/R in to 1 x L/R 100w-max + 1 x L/R 100w-max

I need some helping finding the right pot for my solution

thanks

-KYLE

-MBK (AIM=illmbklli)

[V-bro]

Allright, let me see if I can get this straight....

quote:Originally posted by mbkowns
[br]I want to do 1 set of inputs to 2 pair of outputs

One 'set' as in 'one stereo source' which seems to contradict your next phrase...Or do you mean what I first thought afterall, meaning you want the four 'amp inputs' to be adressed by the stereo signal as L+L and R+R?

quote:Originally posted by mbkowns
[br]
1 x L/R in to 1 x L/R 100w-max + 1 x L/R 100w-max

Here I would conclude you want to feed two amp inputs with mono signal (L+R on input 1 and 2) and the other two inputs (3 and 4) being L and R....

quote:Originally posted by mbkowns
[br]
I need some helping finding the right pot for my solution

I'm trying to help here, but to me you're just not entirely clear yet....and trust me I've made many stepped ladder attenuators, so I know fairly well what the little thingy does...
I can't think of many situations where a normal stereo pot can't be used, except if you want to control four (or awkward number of) channels at the same time....

[mbkowns]

Its for a car computer I want to take 1 stereo output to four speakers. The amp9 does 100watts max and I want that to four speakers. Then I want to control the volume with a POT but not sure which side is safe for the unit because amping low volumes might over work it if I do it on the input but also bad for the speakers on the output to struggle with low power. Is that a little more clear thanks for for your help.

so I ment

in 1 x L/R
out 2 x L/R 100w-max

-MBK (AIM=illmbklli)

[V-bro]

You can use two 'RCA' or 'cinch' splitter (or 'Y-') cables and add a passive stereo pot on them? This makes L+L and R+R and attenuation on the total.

Add a fader from front to rear if you want to be able to adjust it.

Normally the headunit (or computer) controls the volume allready, than you only need to add the potmeter to two L/R input channels on AMP9, the potmeter is than used to attenuate front or rear (the loudest of both, or after your preference...) and the total volume will be controlled through the headunit....

I use it in my car that way, only I built a rotary switch with resistors (the 'ladder attenuator') to attenuate my L/R front speakers. The other two channels drive my L/R subwoofers, without further attenuation. On my Mp3 or minidisc player I control my total volume. I also added LP/HP @~100hz filters in the attenuators with on/off switch....They're in the photo gallery...

I just installed myself a new harddisc after my previous one crashed, otherwise I could have made a drawing....need software...

------X-max. can be several meters on any driver, too bad it can be done only once...------

[mbkowns]

I don't want to use the touch screen as a volume control I want it to be independent all hardware. So basicly just use a inline pot before the amp inputs... does the amp9 come with directions for a 1 pair inputs and 2 pairs cloned out?

-MBK (AIM=illmbklli)

[V-bro]

Only very basic instructions....

My laptop has a touchpad and mouse both active, if your carCPU can have touchscreen and a usb mouse active you can glue a mouse (which is cheap nowadays) on your dash to have mousewheel volume control.....?

Or simply use two stereo pots, one on the source, one on just two of four amp inputs...(the one towards the loudest pair of speakers?). This way you can attenuate the total volume (source) and level between both stereo sets of speakers by attenuating one pair.....

[mbkowns]

I know about hacking up a mouse and how to make it a volume control. I also have a phidget encoder which i programed to control the volume. I want a hardware only solution to this if the computer locks up i want to be able to change the volume. I also want to use a POT i don't like tapping my screen alot to just change volume. so what your saying is its fine to hook at pot on the input side. I always thought it would be hard on the amp to lets say for instance take low volume and try to amplify that.

let me know if I got it right

-KYLE

-MBK (AIM=illmbklli)

[V-bro]

I see no real problem in that, it's ok for the amp input to even short it....which is basically what a potmeter does at low volume....