
 Anthony Easton
Anthony Easton
The Shift Line Olympic MkIIIS is a compact, fully-featured tube bass preamplifier with a warm, deep, and characteristically compressed sound. It combines classic tube sound with modern audio processing technologies, making it a versatile tool for bass players. The preamplifier features universal connectivity, allowing it to be used in complex setups.
Key Features:
- Tube type: 12AX7
- Memory card type: microSD
- IR latency: 1.2ms
- Input (IN): 6.3mm, mono, unbalanced, -20dB, 1MOhm input impedance
- Thru (THRU): 6.3mm, mono, unbalanced, -20dB, 1kOhm output impedance
- Send (SEND): 6.3mm, mono, unbalanced, -10dB, 1kOhm output impedance
- Return (RETURN): 6.3mm, mono, unbalanced, -10dB, 1MOhm input impedance
- Output (OUT): 6.3mm, mono, unbalanced, +20dB, 1kOhm output impedance
- Balanced Out: XLR, mono, balanced, +10dB, 1kOhm output impedance
- Aux In (AUX): 3.5mm, stereo, unbalanced, 0dB, 10kOhm input impedance
- Headphones (PHONES): 3.5mm, stereo, unbalanced, +10dB, 10Ohm output
impedance
- Power: 12V DC 650mA, negative tip, 2.1/5.5mm diameter
- Dimensions (LxWxH): 124x104x55mm (4.9x4.1x2.2")
- Unit weight: 480g (1.06lb)
- PSU weight: 120g (0.26lb)
The preamplifier also includes a series effects loop for external processing, two built-in cabinet impulses (SUNN 200s 2х15 and AMPEG SVT-810E 8х10), and a microSD card slot for uploading custom cabinet impulses. It features controls for gain, 3-band passive EQ (Bass, Middle, Treble), master volume, and high- frequency harmonic content. Additionally, it offers a ground loop override switch and safety instructions for handling high voltage and tube replacement.
The Shift Line Olympic MkIIIS comes with a 12V DC 1000mA PSU with 4 changeable plugs and a user guide. It is designed to provide bass players with a versatile and high-quality tube bass preamplifier for various use-cases.
Watch the latest video demos and reviews for the Olympic from YouTube. Stompbx updates this every six months to reflect the most popular reviewers and guitar pedal demos for each pedal.

Below are live Reverb listings for the Shift Line Olympic from Reverb. Stompbx automatically aggregates current offers to give you a quick look at available models, conditions, and prices. Perfect for comparing options and making an informed purchase.

Excellent
$460.67

Excellent
$521.28

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 Anthony Easton
Anthony Easton
 Anthony Easton
Anthony Easton
 Anthony Easton
Anthony Easton
 Anthony Easton
Anthony Easton
 Anthony Easton
Anthony Easton
 Anthony Easton
Anthony Easton
 Anthony Easton
Anthony Easton
 Anthony Easton
Anthony Easton
 Anthony Easton
Anthony Easton
 Anthony Easton
Anthony Easton
 Anthony Easton
Anthony Easton