Speaker Jack vs. Instrument Jack... Is there a difference?

[Nalte]

I'm converting my combo amp into a separate head and cab (yes, I know it's a horrible idea, but I'm still doing it), and I want to make sure add the correct hardware in the cab.

One of the capital crimes of equipment setup is to confuse a speaker cable with an instrument cable. Does the same apply to the 1/4" jack? Do they make separate jacks for instruments and speakers? For example, will this one from PartsExpress work in the cab?

Thank you, experienced bassists and DIYers, for your sage advice.

[Rick Auricchio]

It's the same type of jack. Just get a quality one and you'll be fine.

You don't really need a switching jack like the one to which you linked, but the switching contacts won't be a problem. Just use the tip and sleeve contacts and ignore any others.

[Nalte]

Thanks! Answers all my questions exactly!

[Chasarms]

They are designed the same, but it is worth noting that, depending on the wattage, there is about 10,000 times more current running through the speaker jack than there is through an instrument jack.

If the metal is too thin, it will get hot. If it gets too hot, anything flamable or meltable that is in contact with the metal will be in peril.

I'm unsure if they are actually current rated, but it's worth looking into before you buy.

[slyjoe]

Generally rated at 10A for decent ones (i.e., Neutrik).

For a combo amp, probably don't need to worry about it.

[billfitzmaurice]

Originally Posted by slyjoe

Generally rated at 10A for decent ones (i.e., Neutrik).

For a combo amp, probably don't need to worry about it.

From the standpoint of current draw true, from the standpoint of inadvertently plugging an instrument into the speaker jack or vis-versa that's the best reason to bag the 1/4" on the speaker output and use a Speakon.

[Energy]

+1 for Speakon. Always the better connection.

[BassmanPaul]

Originally Posted by slyjoe

Generally rated at 10A for decent ones (i.e., Neutrik).

For a combo amp, probably don't need to worry about it.

That current rating is too high. I wouldn't use one past a 100W. Eventually we'll all have to make the change to speakons. Why not change now and be done with it?

Paul