Sound Pure's Take

Condition: Used, Excellent

This Swart amplifier is a beautifully expressive, hand-wired Class A design that delivers rich, dimensional tube tone with remarkable feel and character. Its single-ended circuit, valve rectifier, and zero negative feedback create touch-sensitive response, while lush tube-driven reverb and tremolo add depth and movement at the tap of a footswitch. Built with premium components, point-to-point wiring, and a resonant pine cabinet, it feels alive and responsive at any volume. Compact yet powerful, this Swart is a thoughtful, enduring investment—crafted to inspire creativity and reward discerning players for many years to come.

From Swart Amplifiers

Yep, the STR-Tremolo will have the same soul and basic circuit as the STR-Tweed, just with:


The addition of a great tremolo stage

(along with a revised and more surf Zone Reverb Stage)


The addition of  a 3 way EQ Switch that makes

the STR-Trem more flexible


Available in the original STR "Tuxedo" 60s style

or the AST Style Tweed cab.

Push comes to shove, I think the STR-Tremolo does have a touch less gain than the STR-Treed as the Tremolo section will take place of the extra gain stage in half of the 12AX7.  On the other hand, it will still have much of the STR-Tweed's great tone, immediacy,  growl, and touch sensitivity.  Drop in the Atomic Boost, and you get it back and more.  I really dig this amp and have been playing it daily since we finally got it off the bench. 

5W CLASS A ~ Single-Ended Output

Zero Negative Feedback

100% Tube Circuit - GZ34 or 5Y3 Valve Rectifier

Big Swart Tube - Spring Tank Reverb - Foot Switchable

Swart Tube Tremolo - Foot Switchable

3 way EQ Switch ~ Full, Natural, Low Cut

Powered by choice of 6V6 ~ 6L6 (shod w/6V6)

JJ 12AX7(2) - JJ 12DW7 - JJ 6V6S - JJ GZ34 Rectifier

Shop Tube Subs - Tung-Sol 12X7, TAD 6V6, TAD GZ34

Point to Point Hand Wired Circuit

Cathode Biased (no need to bias)

Carbon Comp Resistors ~ Mallory Caps

Cloth Hook-Up Wire

Hi/Lo Input for High & Low powered Pickups

Heaters referenced to ground

Standby Switch for tube warm-up, extending tube life

All Swart Amplifiers employ Star Grounding

4/8 ohm 1/4" Out - Drive other Speaker/Cabinet

Switchcraft 1/4 inch inputs and output

CTS Potentiometers

Custom High Quality USA Built Swart Spec Iron

Speaker: 12" Mojotone BV-30H ~ 8 ohm

Finger-Jointed, solid Pine Cabs w/Two Build Options

Vintage Jewel Lamp ~ Circuit Fuse Protected

Two-Button Footswitch for on/off Reverb & Tremolo

Dimensions: 17" W x 10 3/4" D X 16 3/4" H (w/feet) ~ 29.5lbs

Warranty

This item is sold without the Sound Pure 3-year warranty (used / B-stock / dealer-exempt). Coverage terms for items in this category live in Terms & Conditions, Section 27.

Returns

Try Before You Buy: 48-hour audition. Program details →

Sound Pure Studios Control Room A — Durham, NC

Sound Pure Studios · Durham, NC

Come hear it in our control rooms.

Sound Pure is a working studio in Durham, NC — a 1,000 sq ft live room and two pro control rooms. Book a session to audition gear in a world-class acoustic space before you buy.