KLH-3 Analog Bass Computer Power Supply

[Fusion9]

Will this plan work for a KLH-3 Analog Bass Computer (ABC) wall wart?

From everything I've read the ABC requires 13 - 14 VAC, 220ma, it draws 9 watts, and is an ac to ac adapter. I think the adapter below is correct, and I can just replace the connector with the one listed, or similar.

Am I doing this right?


Jameco Reliapro ACU140050C6951 Transformer, AC to AC Wall Adapter, 14 VAC/500 mA, Female, 2.8" H x 2.0" W x 1.6" D, Black: Electronic Power Transformers: Amazon.com: Industrial & Scientific

Amazon.com: Fancasee (2 Pack) Replacement 3.5mm Male Plug to Bare Wire Open End TS 2 Pole Mono 1/8" 3.5mm Plug Jack Connector Audio Cable Repair: Industrial & Scientific

 

[swechsler]

I'd test it with a voltmeter before modifying. With (unregulated) DC wall warts, the specified voltage is supplied only when the specified current is being drawn. When the current is lower, the voltage is higher. Since this is AC, it may be just a simple transformer, so if the rating doesn't take current into account, you're probably OK.

There's probably a little flexibility; since AC power supplies like this are unregulated, their output voltage is proportional to their input. But I probably wouldn't want to go more than 10% either way.

 

[Fusion9]

Thanks much! From what you are saying, it won't explode and destroy the universe either way. I'd feel really bad if that happened.

 

[swechsler]

Yes, I think the universe is safe.

 

[Fusion9]

For future reference to others.

Ordered both from Jameco: https://www.jameco.com/

Mono male power plug: PL1035-R: Jameco Valuepro : Mono Male Power Plug 3.5x14.5mm : Interconnects

Wall adapter: ACU140050C6951: Jameco Reliapro : AC to AC Wall Adapter Transformer 14 Volt 500mA Black Straight 2.1mm Female Plug : Power Supplies & Wall Adapters

 

[kfa888]

ALWAYS test these power supplies. You actually can ruin equipment with them as many from china are WAY out of spec. I found out the hard way.

 

[Maxmano356]

I have a set of KLH-3's. Attached is a shot of the wall wart which I believe to be original. I also have a brochure and operating instructions but nowhere are the power supply specs given.


Good Luck - great little speakers!