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Author Topic: ORANGE CRUSH 20 EXT SPKR JACK & SPKR SWAP  (Read 416 times)

GearHead63

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ORANGE CRUSH 20 EXT SPKR JACK & SPKR SWAP
« on: December 29, 2020, 07:52:33 PM »
So I got me an Orange Crush 20 a few months ago. I've been using it mostly for recording into my DAW (works very well).
But I noticed that the sound quality coming from the headphone jack was quite a bit better than the stock speaker,
which is pretty dark sounding. The headphone out has a pretty flat frequency output.
I wanted to be able to run an external 12" speaker in a cab, but it doesn't come with any external speaker jack.
So I punched two 1/2" holes into the chassis, I inserted a 6-lug on-on push button switch and a 1/4" mono jack.
I clipped the spade ends off the cable going to the speaker and wired it to the switch (center lugs), wired the 1/4" jack to the switch and installed new speaker wires to the speaker. Now you can only run it with an 8 ohm speaker, and can use the internal or external speaker. But not both of them. just push the switch and pick which one you want!
Then I looked around for a different 8 inch speaker. I wanted something with fairly flat response, better sensitivity (louder),
and better bass response.
Decided to chance it and bought a Rockville RM88PRO, 8 inch, 8 ohm speaker, which is actually an automotive audio speaker. Paper cone, pleated paper surround, large dust cap. $29 including shipping!
It is LOUDER, has more bottom and top end, and can easily handle being cranked to 10.

Here's the basic specs:
1.5 High Temperature CCAR Voice Coil
90oz. Magnet
Frequency Response:  88Hz - 6KHz
Sensitivity:  108dB @ 1w / 1m
It actually reproduces down to around 30Hz, and up to about 10kHz.
Took me about an hour total time to do the speaker jack mod and replace the speaker. I also ran pink noise through the amp, measuring the headphone out response, the stock speaker and the RM88PRO.
Don't pay any attention to the db levels, I was only trying to check frequency response. As you can see the headphone out is really flat! the stock speaker drops off on the low and high frequencies, and the Rockville speaker KILLS!
« Last Edit: December 29, 2020, 07:56:03 PM by GearHead63 »
Repairing Amps, Electronics, Harley-Davidsons, Guitars,
Cars, Collecting LOTS of "STUFF"!

 

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