OpenAudio
Amplifiers
DACs
Best Known For
Digital Sources
/
Used Products
0
 Available
Average Price
$1,001-$2,500
Brand Popularity
816
 of 900+
Products Listed
9
Review Count
1
Founding Year
2021
Headquarters
China
OpenAudio
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What's unique about the brand

OpenAudio is a hifi brand specializing in multi-room amplifiers that can run up to eight independent streaming instances simultaneously and route them to any mix of eight zones. Their HOLO-WHAS Max delivers unusually high power at 16×200W per channel (3,200W total) and features unique USB Audio Capture for ingesting external sources without traditional analog inputs.

What reviewers are saying

We read all the reviews. Here's what reviewers feel most strongly about:

Our favorite reviewer quotes:

Want to report a correction? Please contact us. We'd love to hear from you. Note that much of the data, recommendations, and summaries on ExtremeHiFi are researched after thousands of hours of loving labor. We archive our site's data and its pages on Archive.org and monitor for those repurposing the data. We also fingerprint data to know when text and numbers came from us.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

From Julian's interview with
.

Lineup comparison

We think it's helpful to understand how their products compare. To learn more about each, scroll to the section above to click through to individual product pages.

HoloHome StreamerAmp Pro

  • Positioning: A compact single-zone streaming amplifier designed for wireless audio delivery.
  • Description: Delivers continuous power of 150W per channel (at 8 ohms) with simplified controls via its dedicated app and supports multiple Wi-Fi audio protocols. Compared to others in the lineup, it omits extra physical inputs like HDMI ARC and optical interfaces, making it a budget-friendly option for users who need robust streaming performance in one dedicated zone.

HoloHome Streamer+

  • Positioning: A single-zone streamer amplifier that offers diverse input connectivity for enhanced home theater integration.
  • Description: Supports HDMI ARC, optical, RCA, and USB inputs along with smart control features such as Apple HomeKit integration, enabling flexible connection with TVs and local media sources. In contrast to the StreamerAmp Pro, its broader interface selection suits those who want versatile connectivity for a living room setup while still serving only one zone.

HOLO-WHAS

  • Positioning: An entry-level multi-zone streaming amplifier tailored for passive speaker systems.
  • Description: Supplies 60W per channel across eight zones with support for AirPlay2, Bluetooth, and DLNA, ensuring basic yet reliable audio distribution in smaller to medium spaces. Compared to higher-priced models, it focuses on essential streaming functionality and a simple setup, ideal for budget-conscious users with moderate sonic needs.

HOLOWHAS Plus-GC

  • Positioning: A multi-zone amplifier that enhances entry-level features with higher power and integrated Google Cast support.
  • Description: Delivers 100W per channel across eight zones and adds native Google Cast functionality for seamless wireless streaming from a wide range of devices. Relative to the standard HOLO-WHAS, it offers increased power output and improved protocol integration.

HOLO-WHAS Max

  • Positioning: A high-end flagship multi-zone amplifier engineered for large audio setups requiring top-tier performance.
  • Description: Provides 200W per channel (3200W total continuous power) over eight zones with extensive input options including AirPlay2, Spotify Connect, and DLNA, ensuring exceptional audio quality and control. Compared to other lineup products, its superior power delivery and expanded connectivity best serve users with high build quality demands and larger room applications.
Website author headshot
Julian Shapiro
ExtremeHiFi Writer

Used

OpenAudio

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Similar

Digital Sources

brands

Known For
Digital Sources
/
Average Price
$1,001-$2,500
Used Products
2
 Available
Brand Popularity
323
 of 900+
Headquarters
South Korea

About the brand

SOtM is a hifi brand that develops its own ARM processor boards specifically for audio, avoiding the sound quality issues common in ready-made processors used by other manufacturers. Their products, including the sMS-200 network player and sPQ-100 phono preamp, stand out for their ultra-low noise technology and rare impedance-matching features, while maintaining a focused approach by eliminating unnecessary features.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

First, we don’t just use advanced technologies like ultra-high-speed digital hardware, precision audio clocking, or noise filtering—we develop them ourselves with a deep understanding of how each element affects sound quality. For example, our proprietary power electronics for audio circuits and custom-designed oscillators play a critical role in delivering our distinctive sound.

Second, while many brands prioritize marketing, we invest heavily in R&D. This means our products may not always be the most widely advertised, but they are built on a solid foundation of innovation and long-term vision. Rather than making minor upgrades, we aim to create fundamentally better products with each release. That’s a philosophy that consistently earns us loyal users around the world.

What's your approach to customer support?

At SOtM, we take customer support seriously. Customers are encouraged to first contact their local dealer or distributor, as they are trained to handle most issues and can provide service in the customer’s native language. However, if further assistance is needed, customers are always welcome to reach out to us directly. When a customer experiences an issue, we aim to respond quickly, diagnose the problem accurately, and offer a solution that minimizes any disruption. We go above and beyond by offering firmware updates, personalized setup help, and sometimes even remote access support to ensure the best possible experience.

What are your favorite tracks for showcasing the strength of your products?

Some of our go-to pieces include:

  • Stravinsky – The Firebird Suite (Finale): Great for dynamics and layering.
  • Copland – Fanfare for the Common Man: Perfect for testing impact, timing, and space.
  • Mahler – Symphony No. 2 "Resurrection": A true challenge for any system, with massive scale and emotional intensity.

We also enjoy film scores for their emotional engagement and wide frequency content. Ultimately, we choose tracks that are musically moving and technically revealing—regardless of genre.

What other products pair best with yours?

Since we produce everything from digital sources to amplifiers and cables—essentially all components except speakers—we typically use speakers from brands like Focal and Magico in our reference systems. All other components in the system are SOtM products, allowing us to demonstrate the full potential of our technology in a fully optimized environment.

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page
Known For
Digital Sources
/
Average Price
$1,001-$2,500
Used Products
0
 Available
Brand Popularity
321
 of 900+
Headquarters
Germany

About the brand

Sonoro creates compact hifi systems with room-specific designs, including water-resistant models for bathrooms and meditation-enabled units for bedrooms. Their products combine premium materials with advanced features like 360-degree sound and streaming capabilities, all while maintaining a sleek, stylish aesthetic that complements various living spaces.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page
Known For
Digital Sources
/
Average Price
$501-$1,000
Used Products
63
 Available
Brand Popularity
56
 of 900+
Headquarters
Canada

About the brand

Bluesound is one of the best entry-level amps if you're looking to dip your toes into hifi. Reviewers love it for what it offers at the price—solid dynamics and tight bass, which is exactly what you expect from good Class D. It’s the go-to pick for people new to hifi since it gives you about 75% of the high-end experience without needing a ton of power. It’s perfect for smaller setups where you want good sound without going all-in on expensive gear.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page
Known For
Digital Sources
/
Average Price
$2,501-$5,000
Used Products
28
 Available
Brand Popularity
124
 of 900+
Headquarters
South Korea

About the brand

HiFi ROSE is a digital source brand known for its large touchscreen displays, including a 12.6-inch screen on their RS520 streaming amplifier and an 8.8-inch screen on their RS201E streamer. They're a rising star in the hifi world, quickly earning awards and recognition for offering near high-end performance at a much more accessible price point. This Korean brand has rapidly gained popularity and regularly appears on annual best-of lists from prominent reviewers, establishing itself as a strong competitor in the industry.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

Industry leading intuitive touch panel interface and 4K video support, which allows you consume content in a new and immersive way without sacrificing audio quality.

What's your approach to customer support?

We have a dedicated service and tech support team. Our sales reps are also trained on supporting the line.

We always encourage the dealer to be involved in the support process since many of the issues can be resolved at the dealer level. Having the dealer involved also provides an opportunity for them to learn how to resolve more common issues. We are also happy and available to assist end users who reach out to us directly.

The best course of action is to reach out to your dealer and alert them of an issue. If your dealer is unable to resolve the issue, they can reach out to their rep or our support team for assistance. If they do not have a dealer, our support team is available via email at [email protected]

Monday through Friday from 9am to 5pm CST.

Our goal is to respond to support issues within 1 business day. If a product is deemed to be defective within the first 30 days of receiving the unit, we will usually offer to replace it.

What are your favorite tracks for showcasing the strength of your products?

  • Led Zeppelin-Black Dog Live - New York 1973 -4K (Youtube)
  • (Sittin' On) The Dock of the Bay feat. Jack Johnson | Otis Redding 50th Anniversary (Youtube)
  • Forever - Mildlife

What other products pair best with yours?

McIntosh, Luxman, Pass Labs 

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page
Known For
Digital Sources
/
Average Price
$2,501-$5,000
Used Products
4
 Available
Brand Popularity
333
 of 900+
Headquarters
Switzerland

About the brand

Wattson Audio is a Swiss hifi brand that builds minimalist, CNC-machined aluminum components with proprietary streaming solutions and advanced clock circuits for precise audio performance. Their products, which support high-resolution formats up to 32-bit/384kHz and DSD256, feature LEEDH Processing for digital volume control without sound degradation, making them particularly appealing to audiophiles seeking natural, analog-like sound from digital sources.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page
Known For
Digital Sources
/
Average Price
$2,501-$5,000
Used Products
7
 Available
Brand Popularity
295
 of 900+
Headquarters
Germany

About the brand

Lindemann Audio is a hifi brand that focuses on digital streaming components, with their Musicbook Source V4 featuring a seamless aluminum chassis and built-in phono stage for both digital and analog enthusiasts. Their Move Mini speakers use a unique full-range driver design that removes traditional crossover components for a more direct sound, while their Limetree series outperforms Raspberry Pi-based audio solutions.

Our interview with the brand

What are two key technological innovations or strong opinions that differ you from other brands?

What's your approach to customer support?

What are your favorite tracks for showcasing the strength of your products?

What other products pair best with yours?

Website author headshot
Julian Shapiro
ExtremeHiFi
Brand Page

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