The Soldano Astro-20 Open Back Half Stack 3-Channel 20W is a Soldano amplifier. Close alternatives include the Marshall Bluesbreaker and the Dumble Overdrive Reverb. It pairs well with the JAM Pedals Tubedreamer and the Xotic RC Booster.
Soldano Astro-20 Open Back Half Stack 3-Channel 20W
Soldano · amplifier
The Soldano Astro-20 Open Back Half Stack pairs the three-channel 20-watt Astro head with a matching open-back cabinet. Open-back cabinets radiate sound rearward as well as forward, giving a less directional and more ambient projection than the closed-back cabinets usually paired with high-gain amplifiers — an unusual choice for a Soldano, and the defining feature of this configuration. It suits players wanting Soldano gain with a more open, less focused cabinet character.
What stands out
“A smooth, saturated, singing high-gain voice drawn from the iconic SLO-100, with clean and crunch channels for range and a built-in DI for direct recording, all at a room-friendly 20 watts with power scaling”
— from the reviews
“players value the astro-20 for bringing genuine soldano slo-flavored high gain to a small”
— from the community notes
“liquid lead voice and the onboard di are highlights”
— from the community notes
“The Soldano Astro-20 Open Back Half Stack pairs the three-channel 20-watt Astro head with a matching open-back cabinet”
— from the listing
“The lead channel sustains beautifully and stays musical”
— from the reviews
- di
- smooth
- high gain
- lead
- open
- direct recording
- low end
- gain
Good for
- Live
- Practice
- Studio
Genres the Soldano Astro-20 Open Back Half Stack 3-Channel 20W is commonly used in
- Metal
cited
Inferred from shared tonal signals, not a stated genre tag. - Hard Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Alternative
cited
Inferred from shared tonal signals, not a stated genre tag. - Blues Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Blues
cited
Inferred from shared tonal signals, not a stated genre tag.
Pedals that stack with the Soldano Astro-20 Open Back Half Stack 3-Channel 20W
JAM Pedals Tubedreamer
Jam Pedals
22% matchpushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (high gain → mid-forward)
JAM Pedals Tubedreamer takes that high gain character and pushes it toward mid-forward
Goes in front of the amp
Xotic RC Booster
Xotic
20% matchpushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (high gain → clean boost)
Feed a high gain signal into Xotic RC Booster and it comes out closer to clean boost
Goes in front of the amp
Z.Vex Super Hard On
Zvex
20% matchpushes an already-dirty tonePushes an already-dirty tone harder and tightens it up. (high gain → clean boost)
Stack Z.Vex Super Hard On on top and a high gain tone tightens toward clean boost
Goes in front of the amp
Wampler Cory Wong
Wampler
17% matchshapes the dynamic responseShapes how the tone responds to picking dynamics rather than its frequency or gain.
What Soldano Astro-20 Open Back Half Stack 3-Channel 20W brings here leans toward smooth — that's worth building a pairing around
Goes in front of the amp
Electro-Harmonix Deluxe Electric Mistress
Electro-Harmonix
15% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor. (high gain → shimmer)
Run Electro-Harmonix Deluxe Electric Mistress after Soldano Astro-20 Open Back Half Stack 3-Channel 20W in the signal chain, clear of Soldano Astro-20 Open Back Half Stack 3-Channel 20W's own gain stage
Goes in front of the amp
Electro-Harmonix Canyon
Electro-Harmonix
13% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor. (high gain → ambient)
Keep Electro-Harmonix Canyon in Soldano Astro-20 Open Back Half Stack 3-Channel 20W's effects loop, clear of Soldano Astro-20 Open Back Half Stack 3-Channel 20W's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Sits in the amp's effects loop
Meris Mercury7 Reverb
Meris
13% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor. (high gain → lush)
Put Meris Mercury7 Reverb in Soldano Astro-20 Open Back Half Stack 3-Channel 20W's effects loop, clear of Soldano Astro-20 Open Back Half Stack 3-Channel 20W's own gain stage — goes in the amp's FX loop (or last, into a clean amp)
Sits in the amp's effects loop
MXR CAE Wah
MXR
tonal matchGoes in front of the amp
MXR CAE Wah belongs in front of Soldano Astro-20 Open Back Half Stack 3-Channel 20W, since a wah tracks picking dynamics best on the raw signal
Alternatives
Marshall Bluesbreaker
Marshall
53% similarityShared character: singing, high gain settings, full
Dumble Overdrive Reverb
Dumble
51% similarityShared character: singing, smooth, lead
Fender 'Black Panel' Vibro Champ Amp (1964-1967)
Fender
45% similarityShared character: gain, high gain settings, full
Marshall Baby Stack MR3005 (Jubilee Series)
Marshall
41% similarityShared character: full
1970s Mesa/Boogie Mark I 'Snake King'
Mesa Boogie
41% similarityShared character: two channels, singing, high gain settings
Questions people ask
What are good alternatives to the Soldano Astro-20 Open Back Half Stack 3-Channel 20W?+
The closest matches in character are the Marshall Bluesbreaker, the Dumble Overdrive Reverb, the Fender 'Black Panel' Vibro Champ Amp (1964-1967).
What pairs well with the Soldano Astro-20 Open Back Half Stack 3-Channel 20W?+
Strong matches from rig and tone-complementarity evidence: JAM Pedals Tubedreamer, Xotic RC Booster, Z.Vex Super Hard On — JAM Pedals Tubedreamer takes that high gain character and pushes it toward mid-forward.