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Order within 4 Hours 48 mins with Scheduled Delivery. If you place an order within this time, We will ship Wednesday, Nov 4 2026. This delivery time is calculated by DHL and FedEx. You can check the exact delivery date on checkout page.
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・Uncompromising premium for tube guitar amps
・Analog
・Reactive
・Load
・Box
・Front-panel RIG control for instant access to album-quality microphone and speaker cabinet emulations
・Expertly crafted virtual mic and cab setups give you recording-ready sound - no amp miking required
・Five expertly tuned attenuation levels, from muted to whisper to full-band volume
・Level
・Proven UA EQ, compressor, delay, and reverb effects built in
【namm2018_kw】
【Amp Top Box】
【Reactive Load Box】True tube amp tone - anywhere, at any volume Go to listening page (external site)Features
・Uncompromising premium for tube guitar amps
・Analog
・Reactive
・Load
・Box
・Front-panel RIG control for instant access to album-quality microphone and speaker cabinet emulations
・Utilize expertly crafted virtual mic and cab settings for recording-ready sounds - no need to mic a real amp
・Five exquisitely tuned attenuation levels, from muted to whisper-quiet to full-band volume
・Level
・Built-in UA renowned EQ, compressor, delay, and reverb effects
・Switchable impedance: 4, 8, or 16 ohms
・Front-panel headphone output for quiet practice, even with a cranked sound
・Balanced TRS line output and S/PDIF digital output for stereo recording
・OX Pair with mobile and desktop apps via Wi-Fi to edit and save RIG presets. The world's best reactive load box. Universal Audio's decades of analog hardware knowledge led the engineering team to design a reactive load box that preserves the tone, dynamics, and feel of a tube amp, regardless of attenuation. The goal was to make the tube amp "see" OX as a real speaker. Continuously variable impedance and response ensure no loss of tone or dynamics. The perfect guitar recording system. OX's six-position RIG control on the front panel lets you quickly select the perfect setup, including emulated speaker cabinets, close mics, ambient room mics, and up to four simultaneous studio effects. OX is also the only guitar recording system with a selection of carefully positioned room mics, providing the authentic experience of capturing a cranked amp in a world-class tracking room while still injecting ambience. Dynamic Speaker Modeling: UNIVERSAL AUDIO's innovative Dynamic Speaker Modeling emulates speaker breakup, drive, and cone cry—essential components of authentic tube amp tone. The OX app's "SPEAKER DRIVE" knob lets you manipulate the harmonics and complex effects that occur at specific frequencies and volume levels in various speakers, just as they do in real speaker cabinets—something not possible with static impulse response systems. Easy-to-use software application: Many guitar products can seem cumbersome and difficult to understand, especially when they're digital. The OX software app provides smooth, intuitive control of all OX RIG settings via Wi-Fi from your iPad or Mac, allowing you to tweak, save, and recall hundreds of presets. Up to six of your favorite tones can be saved to the OX front-panel RIG knob, perfect for quick recall in the studio or at a gig. Connectivity with a Wide Range of Equipment: OX offers connectivity for a variety of recording and live use cases, including a headphone jack for quiet practice with a cranked tube amp. Stereo S/PDIF digital outputs with RCA and optical TOSLINK, and a balanced TRS stereo line output with front-panel level control provide the connections you need for studio monitors, a DAW, or inputs to a live mixing console. Connector: 1/4" Female TS, unbalanced. Input impedance: 4/8/16 Ω (selectable). Maximum power handling: 150W RMS, 200W RMS Peak. Safe load (power off): 16 Ω. Speaker output connector: 1/4" Female TS, unbalanced. Output attenuation: 6 dB steps (0/6/12/24/36/∞ = speaker off). Line output 1-2 (1 stereo pair). Connector: 1/4" Female TRS, balanced. Dynamic range: 114.5 dB (A-Weighting). Frequency response: 20 Hz - 20 kHz, ±0.1 dB. Signal-to-Noise ratio: 114.0 dB (A-Weighting). THD+N: -110 dB @ -3 dBFS. Channel separation: 129 dB. Output impedance: 100 Ω. Maximum output level: 20.2 dBu (balanced). Stereo headphone output connector: 1/4" Female TRS, stereo dynamic range: 113.0 dB. dB (A-Weighting) Frequency Response: 20 Hz - 20 kHz, ±0.1 dB Signal-to-Noise Ratio: 113.0 dB (A-Weighting) THD + N: -107 dB @ -3 dBFS Maximum Output Level: 80 mW @ 600 Ω Digital Output Format: S/PDIF IEC958 Connector Type 1: RCA Female Connector Type 2: Optical TOSLINK JIS F05 Sample Rate: 44.1 kHz Quantization Bits: 24 Power Specifications: Power Supply: Dedicated AC Adapter (Included) Input AC Power Specifications: 100 V - 240 V AC, 50 - 60 Hz Output DC Power Specifications: 12 V DC ±5%, 1.5 A Maximum Power Consumption: 18 W Operating Environment Temperature: 0° to 40°C Storage Environment Temperature: -40° to 80°C Operating Environment Humidity: 10% - 95% humidity (non-condensing) Dimensions (W x H x D): 381.25 x 112.94 (including rubber feet = 138.44) x 204.5 (including knobs/jacks = 229.58) mm Weight: 6.4 kg [OX Software] Full control of OX RIG from your Mac or iPad via Wi-Fi 100 album-quality RIG presets Choose from 17 classic speaker cabinets featuring vintage, NOS, and modern speakers Choose from seven boutique closed mic and six room mic combinations Finish your guitar tone with studio outboard effects like EQ, compression, delay, and plate reverb [Requirements] OX Amp Top Box Apple Mac or iPad macOS: Sierra or High Sierra iPad: iOS 11 Wi-Fi and internet connection for registration Amp Input ■ Management Code: 4530027171279
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Electronics Amplifier Home cinema Guitar Amp Speaker Vacuum tube Universal Audio Universal Audio OX Amp Top Box Attenuator Marshall Broadcast & Pro AV