Overeem Line Amp Mixer

Marsoni

M251S

$149.50

Get it in 3 business days with 1 day shipping. Friday, May 29

Overeem Line Amp MixerHans Overeem was making amps and PA equipment in Brisbane in the late 60s early 70s and apparently was the go to guy for vocal PAs for rock bands. This is a line mixer, with 6 channels (3 groups of 2) into 1 output. Each pair of channels has levels, bass, presence (mid) and treble controls. Inside, it's all discrete transistors running off around 40V. I have fully recapped and restored it, added an output transformer for a balanced out and generally

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Got it for my son’s older ebike that my wife rides now. He kept on popping tubes, maybe because of his weight. Anyhow, I fixed it up for my wife and put some FlatOut in it to prevent flats. Seems to work so far. Got the off road FlatOut for my ebike’s fat tires. Easy to add to the tires. The pump clogs up but it’s easy to clean. I will always add this to all tires moving forward!

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Reviewed in the United States on April 4, 2026

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Brian ward

Whiting, US

★★★★★ 5

Easy to use and works great

Size: 1 Gallon + Tool, Set name: Off-Road Formula

Easy to use

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Reviewed in the United States on April 22, 2026

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Carnegie, US

★★★★★ 5

Worked on slow leak… one month already!!!

Style: 18oz

Edit: Still holding proper pressure at 2-months !!! Had a slow leak where my tire went from 44psi to ~18psi over 2-3 days… Dashboard light would let me know every few days that I had a tire problem and I would inflate the tire back up to 44psi… Anyway, I used this product and filled air back to 44 psi and it’s held the pressure for a month already !!!! Be sure to deflate tire to ~15 PSI before adding the product… it only took about 30 seconds to empty the container into my tire with the tire pressure low. Very happy with this product !!!

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Reviewed in the United States on April 6, 2026

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Kindle Customer

Whiting, US

★★★★★ 5

Excellent stuff!

Style: 18oz

Used this on a Z-Trac with a flat and it fixed it and has held up for over 8 months.

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Reviewed in the United States on May 11, 2026

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