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Roksan Caspian 4G Streaming Amplifier
The Caspian Streaming Amplifier unleashes the power of BluOS, premium multi-room high-resolution wireless streaming through the smart implementation of Euphoria, Caspian’s powerful twin-independent amplification architecture, the revolutionary Rapture DAC technology, for improved digital to analogue signal conversion, and an advanced pre-amplifier and phono stage. All from a sleek aluminium design that exudes quality.
Features at a glance:
BluOS | HDMI eARC | MQA | Bluetooth aptX | AirPlay 2 | Moving Magnet Phono Stage | Euphoria Amplification | Rapture DAC Technology | RCA, XLR and Subwoofer Outputs | MaestroUnite Setup & Control App
For today’s connected consumer and music lover – glorious high-fidelity
Configured and controlled using the intuitive MaestroUnite app, the Caspian Streaming Amplifier delivers extraordinary levels of detailed, high-fidelity sound. Designed for the user.
Made and designed for the user
Caspian Series 4G’s electronics architecture is something really very special. It benefits from an advanced feature set, that ensures all use-cases are being delivered upon. Its flexibility, usability and powerful musical delivery are built into our innovative ‘digital first’ DNA and physical design.
BluOS enabled, premium streaming up to 24-bit/192kHz
The built-in BluOS premium multi-room audio technology can stream up to 64 zones, all controllable via your smart phone.
BluOS supports the world’s most popular streaming services, so you can enjoy unlimited music and podcasts at your fingertips.
Attessa and Caspian users can enjoy a fully immersive whole-home enhanced listening experience in true high-fidelity.
Roon plays on every device
Roon lets you listen to music on all your gear, with support for over a thousand audio devices. Roon Ready products feature Roon’s high-resolution streaming technology built in, and you can also play music on hundreds of AirPlay, Chromecast, USB, HDMI, and other devices, all controlled by one app.
Caspian 4G Remote Control — Total performance at your fingertips
Both the Caspian Streaming Amplifier and Integrated Amplifier come with an elegant and practical Roksan remote control to help users operate their device with ease.
Beautifully designed, its ergonomic, aluminium extruded design is perfectly weighted to sit comfortably in the hand. The buttons are clear and intuitive to use, helping the user navigate through the inputs and directly set pre-sets, as well as a host of standard operational features.
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Roksan Caspian 4G Streaming Amplifier
Combining muscular Class‑AB power with modern streaming, the Caspian 4G is a confident all‑in‑one for serious listeners. Reviewers from Roger Kanno, John Pickford and Roland Schmenner praised its combination of clarity, punch and refinement.
Sonically the amp leans slightly warm but remains transparent, with deep, well‑defined bass, a coherent midrange and controlled treble that preserves detail and natural timbre. Imaging is three‑dimensional and spacious, while the Euphoria Class‑AB topology supplies robust dynamics and headroom.
Built from thick machined aluminium with substantial heatsinks, the chassis is rock‑solid and finished in Black or Silver. For those wanting an elegant one‑box system, the Caspian 4G’s BluOS streaming, Rapture DAC and excellent MM phono stage make it a compelling, well‑specified choice.
Pros
- Powerful, musical amplification with excellent dynamics and headroom that drives demanding speakers without strain.
- Detailed, spacious imaging and transparent midrange that deliver convincing soundstages and instrument placement.
- Comprehensive feature set — BluOS streaming, HDMI eARC, Ethernet/Wi‑Fi, AirPlay 2, aptX Bluetooth and subwoofer management — plus an exceptional onboard MM phono stage.
- High‑quality build and industrial design: matte machined‑aluminium casework, integrated heatsinks and a solid control dial that feel premium.
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Cons
- Initial setup of the MaestroUnite/BluOS apps can be fiddly — installer may need to force a 2.4GHz Wi‑Fi connection to complete pairing.
- Phono stage is MM‑focused; lack of native MC support may disappoint users who require an onboard moving‑coil option.
- Slightly darker/warmer tonal balance and occasional low‑frequency looseness versus high‑end separates on some tracks.
Sound Quality
90/100
Dynamics
90/100
The new Class‑AB 'Euphoria' topology is repeatedly credited with abundant reserves and punch: Fidelity notes it 'exploits all of the speaker’s SPL capabilities' and 'enough reserves to easily drive over 90 percent of the speakers', while SoundStage observed it handled very high volumes without breaking. Transient response is praised as precise and impactful (StereoNET: 'transients have razor‑like precision').
Soundstage Imaging
91/100
Multiple reviewers highlighted a spacious, well‑defined three‑dimensional soundstage and pinpoint imaging (Fidelity: musicians 'standing in the room'; SoundStage Solo: faint backing vocals made perceptible and well placed; StereoNET: 'gloriously capacious three‑dimensional soundstage'). Quiet between notes and fine detail placement were also emphasized.
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Build Quality
92/100
All reviews praise the chassis and construction as high quality and rock‑solid: 'strikingly designed, extremely well‑made housing' (Fidelity), 'absolutely rock‑solid' and matte‑finished aluminum alloy casework (SoundStage Solo), and 'very well‑built and elegant package' (StereoNET). Thermal management and heatsink integration are noted in the industrial design.
Features Connectivity
93/100
Feature set is comprehensive: BluOS streaming, HDMI eARC, Gigabit Ethernet/Wi‑Fi, AirPlay 2, Bluetooth (incl. aptX), USB‑A, two coax and two optical inputs, balanced XLR I/O, subwoofer outputs with crossover and polarity invert, and an internal phono stage. Reviewers applaud both the streaming platform and the extensive digital/analogue I/O, making this very well‑specified for its class.
Value for Money
91/100
Reviewers repeatedly say the amp 'belies its asking price' and call it 'well worth auditioning' and a 'no‑nonsense device' that combines technology, sound and pricing sensibly (StereoNET, Fidelity). While not labelled a bargain, consensus is that it justifies its premium asking price (~$5k in at least one review) given performance and feature set.
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