General speaker impedance selector question

[mikepukmel]

Im working on a fender style chassis, that has standard very low profile. I got Hammond OT's that have taps for 4, 8, and 16. I have only found a Marshall style speaker impedance selector that looks way too big to fit into this chassis, and also not a lot of room om the back panel anyway. Once the amp is build, and the speaker installed, I won't be flipping the switch, so it's there in case I want to try out a different speaker, and Im cool with pulling the chassis to do that. (at least, I think I am )

That said, can anyone suggest some kind of small profile jumper block I can use in place of a big switch, that I can mount inside the chassis? I tried googling but came up with a bunch of odd stuff, since not quite sure what to call this thing.

Thanks!
MP

[Enzo]

I would wire the three transformer wires to a terminal strip through the small hole in the base - leaving the terminal loop itself clear.


Then the wire to the speaker jack reaches to the terminal strip and a quick connect female on its end - the same quick connect like on a typical speaker wire.


Now you can plug the jack wire onto the terminal of choice on the strip. That "selects" the desired impedance.

[mikepukmel]

I would wire the three transformer wires to a terminal strip through the small hole in the base - leaving the terminal loop itself clear.
[ATTACH=CONFIG]44983[/ATTACH]

Then the wire to the speaker jack reaches to the terminal strip and a quick connect female on its end - the same quick connect like on a typical speaker wire.
[ATTACH=CONFIG]44984[/ATTACH]

Now you can plug the jack wire onto the terminal of choice on the strip. That "selects" the desired impedance.

Thanks Enzo, awesome design!

[SoulFetish]

Mike, take a look at these:
Schurter 3 position rotary selector switch labeled for 4Ω-8Ω-16Ω impedances
part# 0033.4032
They are well made, are spec'd for the same load conditions as the commonly used NKK switches and Marshall switches. Actually, I believe that these were designed as a to replace those Marshall style switches in modern applications (Schurter is the OEM for Marshall's rotary switches).
The are inexpensive, low profile, and (most importantly) rated to handle the same loads as the popular NKK and Marshall switches. They barely take up more space that a speaker jack. This is what they look like.


mouser sells them for $13, but if you put the part number into octopart.com it will show you the price and availability of the product for most distributors. (So, I just did that and onlinecomponents.com has them in stock right now for under $10.)

https://www.onlinecomponents.com/sch...f=OctopartFeed

[mikepukmel]

Mike, take a look at these:
Schurter 3 position rotary selector switch labeled for 4Ω-8Ω-16Ω impedances
part# 0033.4032
They are well made, are spec'd for the same load conditions as the commonly used NKK switches and Marshall switches. Actually, I believe that these were designed as a to replace those Marshall style switches in modern applications (Schurter is the OEM for Marshall's rotary switches).
The are inexpensive, low profile, and (most importantly) rated to handle the same loads as the popular NKK and Marshall switches. They barely take up more space that a speaker jack. This is what they look like.


mouser sells them for $13, but if you put the part number into octopart.com it will show you the price and availability of the product for most distributors. (So, I just did that and onlinecomponents.com has them in stock right now for under $10.)

https://www.onlinecomponents.com/sch...f=OctopartFeed

Thanks this is a nice looking switch, looking up now.