Electrostatic Headphone Amplifier


With the great variety of headphone choices, it is only possible to achieve the best performance with a single headset in mind. You can not use the universal headphone amp concept with the Select level of performance. That is why we have built a dedicated Stax* headphone amp to be paired the the Select DAC.


Integrated system.
The Select Headphone Amplifier has been designed to take advantage of the powerful DAC outputs. This allows it to achieve a level of headphone playback never heard.

Analog bypass.
If you are sharing the headphones with a two channel system, use an internal bypass in the amp. Simply turn off the unit for the signal to be sent to your other system.

Anodized finishes.
Elegant yet commanding, our finishes are available in a matte silver or matte black anodize. Our products include our in-house designed viton feet, but any audiophile M6X1 foot can be installed to personalize your system.

Trade in program.
While we’re committed to long lasting products that hold their value, we realize audio systems are always evolving. That’s why we’re thrilled to offer up to 100% trade-in value for existing MSB products when upgrading to a higher performing series. If you currently have an MSB DAC or amplifier that you love–but are looking to experience more from your system–please reach out to your local dealer. We’ll build a personalized offer for your existing MSB products that count towards a new DAC or amplifier. Let us do the work of refurbishing and finding your current electronics a new home–they’ll continue to be enjoyed for years to come. Learn More > Click Here

People are talking.
Since opening our doors in 1986, we’ve been driven by one goal: to craft an unrivaled listening experience for music lovers across the globe. In that time, we’ve pushed the industry forward with each product we’ve built, redefining what’s possible. But don’t take our word for it. See what the reviews are saying. Learn more > Click here

The best of the best.
At MSB, we believe excellence is a promise worth keeping. We’re honored to be recognized by the industry for bringing you the most lifelike sound we can. Check out the awards + accolades. Learn more > Click Here


Additional information

Weight 20 kg
Dimensions 58.4 × 58.4 × 17.8 cm

Available in matte silver or matte black anodize

Dynamic Range

>140 dB

Frequency Response

5Hz-20Khz, ±0.8dB

XLR Input

75Ω Balanced
4Vrms Maximum

Common Mode Rejection Ratio

> 120dB CMRR @ 60Hz
> 90dB CMRR @ 1kHz
> 70dB CMRR @ 20kHz


<-90dB Crosstalk @ 1kHz
<-65dB Crosstalk @ 20kHz

XLR Output

Direct connection to input when enabled or unit powered off.
When listening to headphones, output is muted with 75Ω output impedance

Headphone Output

1x Stax style output

Bias Voltage

580Vdc, 5 MΩ


IR Remote (Configurable)
Power Button (Configurable)
2x MSB 12V Trigger

Power Consumption

Less than 2W standby

Input/Gain Stage (topology)

– Class-A
– Quad balanced
– Impedance matched
– Transformer coupled
– Fully discrete

Output Stage (topology)

– High Voltage Electrostatic Class-A
– Balanced

Chassis Dimensions

Width: 44.4cm
Depth: 44.4cm
Height: 7cm

Chassis Weight


Product Feet

M6X1 Thread

Included Accessiories

-User manual
-Ground cable
-IEC power cord


MSB Technology

Who we are. What we do.

Located in Silicon Valley, our dedicated engineers and production specialists work to bring you the best in high-end audio. Combining elegant design thinking with a passion for lifelike reproduction, our close-knit team, led by brothers Jonathan and Daniel Gullman, build and curate a wide array of hifi products—DACs, transports and amplifiers—setting an industry benchmark. By relying on tight integration between electrical, mechanical and consumer needs, we strive to push the listening experience further. At the end of the day, our joy comes from innovation and sharing our leading-edge technologies with the world.

Designing DACs for more than 25 years has given us keen insights for future ready products. Now, more than ever, our product range has the most flexible architechture yet. California based in-house development and manufacturing has evolved the digital front-end to a new level of playback.

Our people. Our values. Our culture.

We’re a small team of elite designers and technicians united by our love for high-end audio. While we’re builders at heart, our company culture drives the innovation and passion that makes MSB what it is today.

This is who we are.
    • Empower People We rely on a diverse and inclusive work environment where our team is equipped to solve problems on their own—but are invited to seek support when needed.
    • Optimize Quality We promote a culture of growth and improvement that relies upon precision, maintaining high standards and holding ourselves accountable for the work we do.
    • Honest Design We create and support long lasting products while maintaining simple, functional and intelligent design that performs at the highest level.
    • Promote Sustainability We maintain our environmental responsibility by seeking better manufacturing processes and minimizing use of resources.

We believe collaboration leads to excellence. Each member of the MSB team plays a critical role in getting our product out of our doors and into your home.

Contact Us:
    • North America Vince Galbo Sales Manager Phone: (716) 688-3527 vince@msbtechnology.com
    • Europe Very Fine Solutions Frank Vermeylen European Sales Manager Phone: +32 472 42 5775 frank@veryfinesolutions.eu www.veryfinesolutions.com
Find your local dealer > Click Here  
    • MSB Technology Factory & MSB Technology Corp 15 Brennan St. Watsonville CA, 95076 Phone: (831) 662-2800 Hours of operation: Monday – Thursday 8:00am – 5:00pm PST Any questions, email daniel@msbtechnology.com
Need a repair? > Click Here