#1
Boss Waza Tube Amp Expander
Reactive load + IR cabinet simulator · Reactive load box, 8 premium IR cabinets (included), headphone/line out, USB audio, AIRD technology$400–$560 usedBest for: Full reactive load with IR cabinet simulations and USB recording
Boss Waza Tube Amp Expander is a premium reactive load box with built-in cabinet IR simulations and USB audio interface. Connect your amp head to the Waza, and it provides a reactive load that lets you play at bedroom volume while the tone remains authentic tube amp tone. 8 premium cabinet IRs simulate classic guitar amp cabinets. USB audio allows direct recording to a DAW. Used at $400–560.
What to check used: Premium price for a bedroom amp solution. The Waza is ideal for recording and silent rehearsal but adds cost to tube amp setups. Entry-level attenuators like the Weber MiniMASS are much cheaper.
#2
Two Notes Torpedo Captor X
Reactive load box with free IR library · Reactive load, USB audio, 8 included cabinet IRs, access to 10,000+ free CabIRs, compact form factor$320–$440 usedBest for: Best value premium attenuator, massive free IR library, professional studio chain
Two Notes Torpedo Captor X is a professional reactive load box with USB audio and access to the enormous Two Notes CabIRs library (10,000+ free cabinet IRs). The Captor X provides studio-quality tone capture for recording. Reactive load design sounds more natural than resistive loads. Used at $320–440, the Captor X offers professional flexibility at reasonable cost.
What to check used: Reactive load design requires understanding of tube amp loading — complex setup for beginners. Entry-level attenuators like Weber MiniMASS or THD Hot Plate are simpler.
#3
THD Hot Plate
Passive resistive load attenuator · Passive attenuator, no external power, in-line between amp and speaker cab, simple rotary control$180–$260 usedBest for: Simplest attenuator option, classic design, no power supply needed
THD Hot Plate is a passive in-line attenuator connecting between amp output and speaker cabinet. No power supply or external electronics required — just plug in and adjust volume. Simple, reliable, and legendary in the guitar community. Passive design means authentic tube tone without loading concerns. Used at $180–260.
What to check used: Passive attenuators dissipate amp power as heat — the Hot Plate can get warm during extended play. The THD Hot Plate is not a load box (no USB, no IRs) — it is just volume control.
#4
Universal Audio OX Amp Top Box
Premium reactive load + UAD plugins · Reactive load, UAD plugin ecosystem, XLR outputs, 3-band EQ, switching footpedal included, Unison modeling$550–$750 usedBest for: Premium solution with UAD ecosystem access, deepest tone shaping, professional recording chain
Universal Audio OX Amp Top Box is the premium reactive load box with access to Universal Audio's plugin ecosystem (Neve console modeling, vintage preamps, etc.). The OX includes Unison modeling (real-time amp/cab color application). Most professional choice for tone-conscious guitarists. Used at $550–750.
What to check used: Premium price and requires UAD subscription for plugin access. The OX is for guitarists who want professional recording chain + tone shaping. Overkill for casual bedroom players.
#5
Fryette Power Station PS-2
Attenuator + re-amplification box · Attenuator + re-amplification channel, parallel effects loop, tube amp output mastering, XLR outputs$400–$560 usedBest for: Amp attenuator + re-amp functionality for complex tone chains
Fryette Power Station PS-2 combines attenuator functionality with a separate re-amplification channel. This allows recording attenuated amp output while simultaneously running the signal through a separate effects chain. Ideal for guitarists with complex tone requirements. Used at $400–560.
What to check used: Re-amplification complexity adds features that casual bedroom players do not need. Stick with simpler attenuators unless you need parallel amp chains.
#6
Weber MiniMASS
Budget resistive load attenuator · Resistive load, passive, in-line between amp and cabinet, manual volume control, compact$80–$120 usedBest for: Most budget-friendly option, silent bedroom practice, simple design
Weber MiniMASS is a very affordable in-line attenuator for bedroom volume control. Passive resistive design is simple and reliable. For guitarists who just want to turn down their tube amp without losing tone, the Weber MiniMASS is the most economical choice. Used at $80–120.
What to check used: Resistive load design is less transparent than reactive loads — tone may sound slightly compressed. Best for practicing silently; not ideal for professional recording.
#7
Two Notes Torpedo Captor
Reactive load box (standard version) · Reactive load, USB audio, 4 included cabinet IRs, CabIRs library access, smaller than Captor X$180–$240 usedBest for: Portable reactive load, excellent value alternative to Captor X
Two Notes Torpedo Captor (standard version) is a more compact, affordable alternative to the Captor X. Same reactive load technology and USB audio, but fewer included IRs and a smaller footprint. Still provides access to the CabIRs library. Used at $180–240, excellent value for reactive load technology.
What to check used: Smaller form factor than Captor X may limit cooling — not ideal for extended high-power amp use. Captor X is recommended for sustained use.
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