Dual amp and dual speaker selector
- Thread starter Beginner_N
- Start date
antoniodias
Active Member
Great Sir. Loved that idea. In fact I was looking at some on the net. Could you tell me the price please. And do we require 2 for 2 different amplifiers, but the speaker set is the same? Do reply
Congrats on your built. Can you put some additional info about the working of this switch. I See 2 switches and 4 pair of connectors in your Photo. The 2 switches are fine but I am unable to understand about the 4 pair of connectors, are there additional connectors on backside of the top box Or it has switches on back side.
Beginner_N
Well-Known Member
Thank you Sadik.
Each consists of 2 switches 1 for speaker and 1 for amplifier selection.
Both are on-off-on switches.
About terminals, 2 are amplifiers and 2 are for speakers.
I am still unable to figure it out. As I said i can see only 4 pair of connectors. So if you connect wires from 2 amplifiers to them then all will be used, Now where will you connect the speakers? That's my question.
Beginner_N
Well-Known Member
There are 2 boxes. One to the left one to the right. Each box will have 2 amp inputs and 2 speaker output. That makes 4 pair terminals on each side. And 2 switches one for amp and one for speaker selection.
surfatwork
Well-Known Member
Are you using dpdt switches or Relays to switch? If normal switches, are they break before make? Can they take the switching current?
Beginner_N
Well-Known Member
It's dpdt on off on switch with 15A rating.
surfatwork
Well-Known Member
I assume you mean 3 position switches.. Just checking that there is no chance of short-circuit ing one amp output to the other amp.
15A seems good for most domestic use. Assume 250VAC? Might be an idea to state max ratings, so someone doesn't try to use this for a professional setup.
Beginner_N
Well-Known Member
Thanks for your inputs.
It's 3 position switch.
I would like to get more information on cons of this design. I am mechanical guy so might have missed something. This will be helpful for HFV member as well.
Also anything which can help to make this box more safe.
surfatwork
Well-Known Member
Make sure the switches and the contacts within are really good quality. If there is corrosion, or bad contacts, it can cause problems. Ideally the switch should be sealed.
You could use a snubber circuit to minimize arcing.
Even better a high current solid state relay would be great. The circuitry for this can be pretty simple.
You could use a snubber circuit to minimize arcing.
Even better a high current solid state relay would be great. The circuitry for this can be pretty simple.
I used 0.047 uF X2 capacitor rated at 1100V for suppressing spark for my TT. Works well.
A beautiful, well-constructed speaker with class-leading soundstage, imaging and bass that is fast, deep, and precise.
