Description
The Swart Space Tone Atomic Jr 5-Watt 1×8″ Guitar Combo Amp (2020, Tweed) delivers boutique Class A tone in a compact, beautifully crafted package. This used amplifier is in exceptional cosmetic and functional condition, showing only a few tiny blemishes in the lacquered tweed. Everything has been fully tested and works exactly as it should. The cabinet legs are also in excellent shape. Not mint—but not far off!
Inspired by the classic single-ended, all-valve American amps of the 1950s, the Swart Space Tone Atomic is built around a refined and modified Fender Princeton 5F2/5F1 circuit, enhanced by Swart’s own tonal tweaks. The result? A uniquely rich, harmonically complex, touch-sensitive amplifier with musical breakup and unmatched character.
Founder Michael Swart, a longtime musician and recording engineer, designed this amp to extract the most tone and soul from a small-format combo—and it absolutely delivers. Whether you’re recording, practicing, or performing, the Space Tone Atomic Jr stands in a league of its own.
This model features premium tubes, custom-wound Heyboer transformers, point-to-point wiring, and a Weber Ceramic Sig 8 speaker for authentic vintage flavor with modern reliability. If you’re after killer low-wattage tone, this is the amp.
We invite you to browse the photos and contact us with any questions!
Specifications
Space Tone – Power & Circuitry
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5W Class A with rich even-order harmonics
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Single-ended output with zero negative feedback
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100% tube circuit with valve rectifier (no solid-state diodes)
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3dB negative feedback/compression switch
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Point-to-point hand-wired circuitry
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Cathode-biased (no biasing required)
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Cloth hook-up wire
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Heaters referenced to ground
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Swart star-grounding system
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1A slow-blow fuse protection
Swart – Tubes
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JJ 12AX7 (preamp)
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JJ 6V6GT (power)
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JJ GZ-34 or NOS 5Y3 (rectifier)
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Compatible with 6L6 family for more headroom (no KT66)
Components
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Heyboer custom-wound output & power transformers
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CTS potentiometers
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Switchcraft 1/4″ input & output jacks
Speaker & Outputs
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Weber Ceramic Sig 8 “Straight Cone” speaker (4Ω or 8Ω)
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4Ω 1/4″ output for external cab
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Safe with 8Ω speaker loads
Cabinet
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Finger-jointed pine
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Lacquered tweed finish
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Dimensions: 13 3/4″ H × 13″ W × 7 1/4″ D
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Weight: 14 lbs
Shipping Info
We offer worldwide shipping (rates vary by destination). International buyers, please contact us for an exact quote before purchasing.
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All orders ship within 1 business day (continental U.S.)
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Expedited, Hawaii, and Alaska shipping available for an additional cost
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All items ship fully insured
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Most items ship in custom double-walled boxes for maximum protection
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Orders over $50 require a signature
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PO Box shipments for large items may incur additional charges
If you wish to waive the signature requirement, you must notify us. You assume full responsibility for loss or theft.
Returns
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Original shipping costs are non-refundable on non-defective returns
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A 10% restocking fee applies to all non-defective returns
Swart Official Site
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