KSR Amps Orthos MkII

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Page last updated Aug 10, 2025

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Description

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The KSR Amps Orthos MkII is a powerhouse guitar amplifier head that stands out in the world of high-gain amplification. Designed for guitarists who demand precision and versatility, this amp head is perfect for both studio sessions and live performances. With its dual-channel architecture, the Orthos MkII offers a wide range of tonal possibilities, from pristine cleans to crushing high-gain distortion. Each channel is equipped with its own independent EQ controls, allowing for fine-tuned sound sculpting tailored to your unique playing style.

The Orthos MkII is also equipped with a footswitchable boost function, providing an extra layer of dynamic control. This is ideal for lead players looking to cut through the mix with ease. Furthermore, the amp is built with KSR's proprietary preamp section, which ensures consistent performance and reliability. The robust construction of the Orthos MkII means it can withstand the rigors of touring, while its intuitive interface makes it easy to dial in your perfect tone quickly.

Whether you're playing in a metal band or exploring the subtleties of jazz, the KSR Amps Orthos MkII delivers the power and clarity you need to shine.

Key Features:

Dual-channel architecture with independent EQ controls
Footswitchable boost for dynamic lead playing
Proprietary preamp section for consistent performance
Robust construction suitable for both studio and live settings
Intuitive interface for easy tone adjustments

Videos

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KSR Amps

KSR Amps - Orthos 100 Mk2 -- Zoom Q2n Test

KSR Amps

Orthos Mk2 Teaser

KSR Amps

Orthos 100 Mk2 -- RCS/212 w/ V30 + K100

KSR Amps

KSR Amplification Orthos MK-II Run Through

Truck Driver Shawn

Reviews

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5.0 out of 5

Based on 1 Review and 1 Rating

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clint_norwood

105

about 7 years ago

Versatile High Gain Boutique amp.

Two channel amp with 2 modes on each channel. The effects loop can be enabled or bypassed for each mode. Crunch and bright switches allow for more tone diversity. Definitely a unique amp with great tone/features.

Roles:

Guitarist

Genres:

Rock New Wave Alternative rock

Artist usage

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Joe Satriani

Guitarist

Mark Knopfler’s Guitar Heroes

Verified via Photo

Shown on KSR’s official artist page. Satriani acquired his Orthos MKII shortly before the recording of What Happens Next and used it extensively on the album. His personal notebook details the amp’s use.

“Smooth Soul”

Melodies: MCO#1, Peavey 5150 Solo: KSR Orthos Rhythm Guitars: Gibson Custom Shop goldtop, Korg G4 Rotary Speaker, Fender ’59 Tweed Twin, Wells amp into Fender Deluxe

(...) “What Happens Next”

Melody Guitar: MCO #1, Re-amped with KSR Orthos and Tech 21 SansAmp Power Chords: ’63 Fender Deluxe

(...) “Super Funky Badass”

MCO #1, Re-amped with KSR Orthos Breakdown Rhythms: Fender Custom Shop ’69 Strat (gold sparkle), Electro-Harmonix Mel9, Electro-Harmonix Micro POG, Roger Mayer Voodoo Vibe, Strymon El Capistan

“Invisible”

Melody/Solo/Intro/Outro: MCO#1, KSR Orthos, Wells Amp into Fender Deluxe cab Intro/Outro: JS25ART #47, Electro-Harmonix Micro POG, KSR Orthos Rhythm Guitars: MCO #1, Dunlop EchoPlex Preamp, Wells amp/Fender Deluxe Cab