Katana - Add the missing speaker output jack on Katana Combos

Started by Elantric, November 29, 2016, 10:44:55 AM

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gumtown

Based on some peoples measurements of the 50 Watt Katana speaker DC resistance, I would say it is about 6 Ohms.

Boss say its 4 Ohm, actual measurements put it at around 6 Ohms.

You could measure your speaker DC resistance with a digital multimeter, best to use a quality one that supports low Ohms, and at first measure a zero reference with the test leads shorted together to subtract the test lead resistance.
Then the DC resistance is multiplied by 1.3 to approximate the impedance value Z (ohms).
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philjynx

I think it's worth reiterating that it's too few ohms that can damage the amp, not too many. The lower the impedance the nearer you're getting to short circuit which is what cooks the amp. A cab with too many ohms will just not be as loud (even that isn't entirely true, but it's a good rule of thumb).

admin

Despite what Boss support states,

Confirmed Katana 50 MK1/MK2  has a 8 ohm 12" speaker

Measures 6 DC Ohms ( like all 8 ohm speakers)

isoneedacoffee

Any comments on the disparity on the connector terminal sizes that are needed?

philjynx

Quote from: isoneedacoffee on March 29, 2021, 01:59:34 PM
Any comments on the disparity on the connector terminal sizes that are needed?
You just need connectors that'll stay attached.

isoneedacoffee

Quote from: philjynx on March 29, 2021, 02:18:20 PM
You just need connectors that'll stay attached.

To remain attached they have to fit, which is why the size matters.

philjynx

Quote from: isoneedacoffee on March 29, 2021, 02:54:14 PM
To remain attached they have to fit, which is why the size matters.
The figures you quote are the widths of the connectors which is not critical, the thickness of the lug that they fit onto is what (mostly) determines whether they grip onto it. Buy both types, they cost pennies.
Alternatively, as you have the amp, have you considered measuring the terminals?

Try them for grip before committing yourself to crimping any wires or switching anything on.


Once you've made that decision it's a good idea to use shrink insulation to help hold them in place & prevent other stray conductive items from shorting them and letting the smoke out.