★★★★★ 5
Great product
Great product
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Reviewed in the United States on December 30, 2025
Darkglass Harmonic Booster Clean Bass Preamp
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Darkglass Harmonic Booster Clean Bass PreampThe Darkglass Harmonic Booster is a clean bass preamp that improves the attack of your bass while tweaking the midrange to add a percussive bite. Originally designed as part of a bass overdrive, the team at Darkglass separated the preamp section after realizing their 'harmonic excitation circuitry' sounded great with less gain. The Harmonic Booster has an active 3 band EQ along with a character knob to add additional enhancements.
Quick Dispatch:
Your Darkglass Harmonic Booster Clean Bass Preamp orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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You'll receive a tracking link by email once your Darkglass Harmonic Booster Clean Bass Preamp ships.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.6 ★★★★★
Based on 184 reviews
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Product Reviews
★★★★★ 5
Fit Mercury 150 saltwater 2 stroke great!
These fit my Mercury 150 perfect. Took it out for a test run and engine ran great with no overheating issues.
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Reviewed in the United States on August 26, 2025
★★★★★ 5
Work’s okay
They work ok, as expected
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Reviewed in the United States on August 26, 2025
★★★★★ 5
Just as good as OEM
Exactly what I expected...
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Reviewed in the United States on August 9, 2025
★★★★★ 5
Fit perfectly
Truly impressive, bought these and a set from a us boat supplier a thermostat made in the USA . They came with the gasket separate . I could not figure out how to put it together . I used these in my mercury optimax 135 hp . They fit perfectly and appear to be working great at a quarter the cost .
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Reviewed in the United States on August 29, 2024
