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USED Swart Space Tone Forty Five ST-45 Hand-Wired 45 Watt Tube Amp Head w/ Studio Slips Padded Cover – 6L6 Based, Black Lacquered Tweed

Out of stock

We're currently out of stock on this item but if you'd like to inquire about incoming stock, a special order or a custom build, use the form below to get in touch with one of our specialists, and we'll get you taken care of!
– Matt's Music Staff


This is a used amp. The item pictured is the one you will receive. It has been tested and gone over by the experts at our shop to ensure it’s working properly and is free of issues, unless otherwise noted in this listing. Please see pictures provided and the notes below for condition and wear. It will be packed with care to be shipped to your door! If you have any questions about this or any other piece of gear we have, please let us know and we’ll be happy to help!
Condition Notes:
– Condition: 8.5/10
– Any wear of note: The seam of the tweed on ride side of the amp is showing slightly, but it’s not actively pulling away. The lacquered tweed is still rigid and it doesn’t seem to be an issue. There’s a couple of very light scuffs in the tweed, but nothing glaring and nothing that’ll photograph. All very minor and the amp itself is in overall amazing shape! Includes padded Studio Slips cover with pouch and power cable.


From Swart:
The ST-45 Convertible
45w of 6L6 Tube ART/Beauty/TONE


We ARE excited about this one…
You’ve been waiting long enough. The all-new Space Tone Forty-Five is finally HERE and although the wait long, it’s more than worth it as it’s an amp residing outside the box, literally, this in both sonics and aesthetics. Hyperbole aside, this amp is going to make some serious waves, akin to the original release of the AST. Think of it as an AST on steroids, with amazing CLEANS, all housed in a chassis that can be put on display for tube admiration.
The ST-45 is a first for Swart Amps on a number of fronts. It’s our first 45 watt amp that’s dedicated to getting the absolute MOST from the 6L6 power tube, this via our first production “easy set” Fixed Bias offering, key in getting every last bit of goodness from this circuit. It’s our first offering that eschews our simple tone cut, moving to separate bass and treble controls, designed to refine the frequency palate for a bit more control of bottom/top. This is aided by a very useful 3-way EQ switch to help further tailor the response/output depending on room/output/guitar.

But the REAL bottom line is the ST-45 has absolutely STELLAR CLEANS at higher volume, so sweet and alluring with no trace of the mechanical, no hardness. This amp really nails that elusive harmonic richness while still sounding open and transparent. As the power increases, this is not always an easy feat but Michael has managed to pull it off here.
Of course, the ST-45 has that great Swart touch sensitivity and is actually a tool that can reveal differences in guitars instead of all guitars sounding like the amp.
You’ll also recognize the great Swart tube/spring tank driven reverb along with that signature lush swart tube tremolo, built for players that don’t even like tremolo but will appreciate it as an amazing tool that can be implemented to create depth.
And like all Swarts, the ST-45 employs tube rectification, via the GZ-34 or 5Y3, key in getting some of that magical lack of mechanical sound while winding in a bit of compression, sweetness, and hint of sag. It actually makes this powerful amp keep some of the sweetness of lower power options while still bringing the clean headroom needed for more challenging situations. We just find tube rectification lends a naturalness to the sound that one can find absent in some solid state offerings.
But the real kicker with this beast? It’s actually as beautiful as it sounds, with another first for us, a fully convertible HEAD cab that can be removed to show this beast off in full glory. It’s an aesthetic masterpiece mated with the easiest access to tube rolling fun you’ll ever find. The cab is secured with four heavy duty latches, this for removal of the top, leaving chassis sitting on its base, glowing for all to see. These turn key latches are extremely well-made, solid as the proverbial rock. And man, the look of this amp sitting topless on the cab is a sight to behold, with all the tubes aglow. Or you can simply opt to just leave it enclosed if you desire though once you go topless, it’s hard to go back.


⦁ 45W CLASS AB ~ 6L6 Power ~ JUST INSANELY BIG TONE w/Reverb and Tremolo
⦁ Push Pull Output – Zero Negative Feedback
⦁ 100% Tube Circuit – GZ34 or 5Y3 Valve Rectifier (Currently loaded w/ GZ34)
⦁ Big Swart Tube Reverb via 12DW7 & Spring Tank
⦁ 3 way EQ switch changes the EQ curve used by tone controls
⦁ Power provided by a pair of 6L6’s
⦁ 3 X JJ 12AX7 – 1 X JJ 12DW7 – 2 TAD 6L6 – TAD Select GZ34 Rectifier
⦁ Hand-Wired Turret board construction
⦁ Fixed Biased for Circuit Optimization ~ Easy Checking/Setting of bias with volt meter & screwdriver.
⦁ Carbon Comp Resistors ~ Mallory Caps
⦁ Cloth Hook-Up Wire
⦁ Heaters referenced to ground
⦁ All Swart Amplifiers employ Star Grounding
⦁ 4 and 8 ohm 1/4″ Output
⦁ Switchcraft 1/4 inch input and output
⦁ High & Low Inputs to match PU sensitivity
⦁ CTS Potentiometers
⦁ Custom High Quality USA Built Swart Spec Iron (Custom Blue Paint)
⦁ Choke Power Supply w’/Extra Filtering
⦁ Finger-Jointed, solid Pine Cab w/ Lacquer Tweed Cover
⦁ Vintage Jewel Lamp ~ Circuit Fuse Protected
⦁ Size: 19″ wide, 9.5″ deep, 11″ high
⦁ Weight: 28lbs (w/Top)

Shipping & Returns

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Most orders over $99.00 ship for free inside the lower 48 states. Certain items that are large and heavy do not qualify for free shipping.

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For information on International Shipping, please call, email or use live chat for rates. Orders shipping outside the Lower 48 States to Hawaii, Alaska, Puerto Rico and international orders do not qualify for free shipping. Orders shipping to U.S. Military APO/FPO addresses, PO Boxes, and US territories (Guam, Virgin Islands, etc.) can only ship USPS. NOTE: Boxes over 70 lbs each cannot be shipped to these locations.

As a security precaution, orders over $200.00 will only ship to the address your credit card company has on file for you.

*Korg and Mesa/Boogie products are only available for shipment within the USA.


We want you to be completely happy with your purchase, so we offer a 48 hour approval period on most purchases (see exclusions below). The 48 hour approval period begins when your purchased item is delivered to your door. If after 48 hours you’re not happy with the item, just contact us via phone, email or live chat on our website to arrange for a return authorization (RA#) and return shipping instructions. Any package sent back without prior authorization will be refused.

Returns must be shipped back to us within two days of the RA being issued. Items must come back to us undamaged and in the same condition they were shipped out. All manuals, paperwork, cables, tremolo arms, wrenches, etc… must be included or full credit will not be issued. Any items not conforming to this policy will be subject (at our discretion) to a restocking fee of 20% of the purchase price.

Refunds will be issued minus all related shipping expenses, if free shipping was initially given, the cost we incurred to get the item to you will be deducted from your refund. A 10% restock fee will also be deducted from your refund. Restock fees will be waived for full value exchanges.

Here are exceptions to our return policy.

  • Custom orders of any kind are non returnable and non refundable. We often charge a deposit before we will place a custom or special order. All special order deposits are NON REFUNDABLE, no exceptions.
  • Microphones, Harmonicas, In-Ear Systems and any other items that come into contact with your mouth or ears.
  • Items labeled as BLOWOUT, are non-returnable. These are often being sold below cost and are considered “all sales final”.
  • Software (this may also include hardware that includes software), unless still in shrink wrap with barcode affixed.
  • Guitar strings, blank media, and other disposable merchandise.
  • Guitar or bass pickups that have been installed or used in any way.
  • Any item advertised as “USED” is non returnable.

*Payments for music lessons are non refundable, no exceptions.

View our detailed Return Policy here.

Early Order Cancellation

All deposits are non refundable. Lots of our products are special orders and in many cases your order has to be built for you at the factory. This is what makes a lot of our products special. Once your order is started, it's being put together just for you. For this reason we ask that you don't cancel your order after you place it with us. If for some reason you absolutely have to cancel your order with us, we will assess you a 25% cancellation charge. This amount is equal to 25% of your total order amount. Ask us before you place your order to see if what you're purchasing is considered a special order.

Damaged Merchandise

Do not accept your shipment if the package shows any signs of external damage. After the item is returned to us we will ship you a replacement. If you receive incorrect or defective merchandise, please call 781-335-0700 within 5 days for a return authorization number.