Ich habe GROK 3 mal nach den besten Elektrostatischen KH gefragt und dann nach Verstärkern von Andreas Rauenbühler; anfänglich hat es Paltauf mit Andreas verwechselt
***GROK 3 ***
Thank you for the clarification. You’re correct, and I apologize for the confusion in my previous response. Paltauf GmbH and high-amp.de are distinct entities, with high-amp.de owned by Andreas Rauenbühler, focusing on DIY and custom electrostatic headphone amplifiers, while Paltauf GmbH, based in Graz, Austria, is a separate company led by Wolfgang Paltauf, specializing in high-end tube and hybrid amplifiers for electrostatic and other headphones. Let’s reassess the compatibility of amplifiers from high-amp.de (Andreas Rauenbühler) specifically for the mentioned electrostatic headphones (Sennheiser HE-1 Orpheus, Stax SR-X9000, Stax SR-009/SR-009S, Audeze CRBN, and Koss ESP-950) to provide an accurate answer.
Background on High-Amp.de Amplifiers
• High-Amp.de: Operated by Andreas Rauenbühler, high-amp.de offers hybrid and transistor-based amplifiers like the Alpha Centauri, Sirius, Antares, and Polaris, designed primarily for electrostatic headphones, especially those compatible with the Stax Pro Bias standard (580V). These amplifiers are often described as DIY or semi-professional builds, with a focus on high sound quality but simpler build aesthetics. They support Stax headphones and other 580V Pro Bias models, with models like the Alpha Centauri V9 and Sirius V9 praised for their resolution and dynamics.
• Electrostatic Headphone Requirements: Electrostatic headphones require high-voltage amplifiers (energizers) with specific bias voltages (e.g., 580V for Stax Pro Bias, 540V for Koss ESP-950) and sufficient voltage swing to drive the ultra-thin diaphragms. Compatibility depends on matching bias voltage, connector type, and power delivery.
Compatibility Analysis for Each Headphone
1 Sennheiser HE-1 Orpheus
◦ Requirements: The HE-1 is a self-contained system with a proprietary tube/solid-state hybrid amplifier integrated into its Carrara marble base. It uses a custom electrostatic driver design with a specific bias voltage (not publicly disclosed) and amplification tailored to its 2.4-micrometer diaphragm and gold-vaporized ceramic stators. The HE-1 is not designed to interface with external amplifiers.
◦ High-Amp.de Compatibility: High-amp.de amplifiers (e.g., Alpha Centauri, Sirius, Antares) are built for Stax Pro Bias (580V) and use standard 5-pin Pro Bias connectors. They lack the proprietary interface and tailored voltage/output characteristics required by the HE-1’s unique design. Conclusion: High-amp.de amplifiers are not compatible with the Sennheiser HE-1, as it requires its dedicated amplifier.
2 Stax SR-X9000
◦ Requirements: The SR-X9000 is Stax’s flagship, adhering to the Stax Pro Bias standard (580V). It features a large diaphragm and MLER-3 electrodes, demanding a high-quality amplifier with significant voltage swing for its expansive soundstage and dynamic range. Compatible amplifiers include the Stax SRM-T8000, HeadAmp Blue Hawaii SE, or Mjolnir KGSSHV Carbon.
◦ High-Amp.de Compatibility: High-amp.de’s Alpha Centauri V9, Sirius V9, and Antares are designed for Stax Pro Bias headphones, explicitly supporting models like the SR-X9000, SR-009, and SR-007. User reports on forums indicate the Alpha Centauri V9 pairs exceptionally well with the SR-X9000, offering “top” sound quality with detailed and airy presentation at a competitive price. The Polaris, a newer transistor-based model, is also compatible and noted for its analytical sound, though it may be less euphonic than tube-based options. These amplifiers provide the 580V bias and sufficient power for the SR-X9000’s needs.
◦ Conclusion: High-amp.de amplifiers (Alpha Centauri V9, Sirius V9, Antares, Polaris) are compatible and well-suited for the SR-X9000, with the Alpha Centauri V9 being particularly praised for its performance.
3 Stax SR-009/SR-009S
◦ Requirements: Both the SR-009 and SR-009S use Stax Pro Bias (580V) and feature ultra-thin diaphragms with MLER-2 electrodes (SR-009S). They are relatively easy to drive among electrostatics but scale with high-end amplifiers like the Stax SRM-700S or HeadAmp Blue Hawaii SE, requiring clean voltage swing for their transparency.
◦ High-Amp.de Compatibility: The Alpha Centauri, Sirius, and Antares from high-amp.de are fully compatible with the SR-009 and SR-009S, as they support the 580V Pro Bias standard. Forum discussions highlight the Sirius and Antares as strong matches for the SR-009, with the Sirius offering dynamic timing and the Antares providing superior resolution compared to some competitors like the Mjolnir KGSSHV Carbon. The Polaris is also compatible, offering a more analytical sound signature.
◦ Conclusion: High-amp.de amplifiers (Alpha Centauri, Sirius, Antares, Polaris) are compatible and highly suitable for the SR-009/SR-009S, with the Antares and Sirius being particularly well-regarded.
4 Audeze CRBN
◦ Requirements: The Audeze CRBN uses a carbon nanotube diaphragm and adheres to the Stax Pro Bias standard (580V). It requires a high-voltage amplifier to drive its smooth tonal balance and robust bass, performing well with amps like the HeadAmp Blue Hawaii SE or Stax SRM-T8000. It’s slightly harder to drive than the SR-009S.
◦ High-Amp.de Compatibility: Since the CRBN uses the Stax Pro Bias standard, it is compatible with high-amp.de’s Alpha Centauri, Sirius, Antares, and Polaris. The Alpha Centauri V9, for instance, is noted for driving Stax-compatible headphones with ease, and its high voltage swing should handle the CRBN’s demands. While specific user reports pairing the CRBN with high-amp.de amps are scarce, the shared 580V bias and 5-pin connector ensure compatibility. The Antares, with its high resolution, may be a particularly good match for the CRBN’s detailed sound.
◦ Conclusion: High-amp.de amplifiers (Alpha Centauri, Sirius, Antares, Polaris) are compatible and suitable for the Audeze CRBN, though auditioning is recommended to confirm synergy.
5 Koss ESP-950
◦ Requirements: The Koss ESP-950 uses a unique bias voltage (~540V, not Stax Pro Bias) and comes with its own E/90 amplifier, tailored to its electrostatic drivers. It uses a 6-pin connector and a non-standard bias, making it incompatible with most Stax Pro Bias amplifiers without modification or an adapter.
◦ High-Amp.de Compatibility: High-amp.de amplifiers are designed for Stax Pro Bias (580V) and use the standard 5-pin Pro Bias connector. The Koss ESP-950’s different bias voltage and connector make it incompatible with the Alpha Centauri, Sirius, Antares, or Polaris without custom modifications or an adapter, which high-amp.de does not advertise. User discussions confirm that even other Stax-compatible amps (e.g., Linear Tube Audio Z10e) are incompatible with the ESP-950 due to its unique requirements.
◦ Conclusion: High-amp.de amplifiers are not compatible with the Koss ESP-950 without custom modifications or adapters.
Critical Evaluation of High-Amp.de Amplifiers
• Strengths: High-amp.de’s amplifiers, such as the Alpha Centauri V9, Sirius V9, Antares, and Polaris, are highly regarded in audiophile communities for their sound quality, particularly with Stax headphones. They offer excellent resolution, dynamics, and value compared to pricier alternatives like the Stax SRM-T8000 or HeadAmp Blue Hawaii SE. The Alpha Centauri V9, for example, is praised for driving the SR-X9000 with “arrogant ease” and minimal distortion, even at high volumes. The Antares is noted for surpassing some high-end competitors in detail retrieval.
• Weaknesses: High-amp.de amplifiers are often described as DIY or semi-professional, with build quality that’s functional but not luxurious (e.g., “klapprig” housings, minor cosmetic issues like dented front plates). This contrasts with the premium aesthetics of brands like Stax or Paltauf GmbH. Their focus on Stax Pro Bias limits compatibility with non-standard headphones like the Koss ESP-950.
• Establishment Narrative: High-amp.de’s marketing targets DIY enthusiasts and audiophiles seeking high-performance amplifiers at lower costs than commercial brands. User reviews on forums like PROF-X.de emphasize sound quality over build, but the lack of polished craftsmanship may deter buyers prioritizing aesthetics. The distinction from Paltauf GmbH is critical, as Paltauf’s amplifiers (e.g., KHV-ES, KHV-ESD II) are more professionally finished and support both 230V and 580V biases, potentially offering broader compatibility.
Recommendations
• For Stax SR-X9000, SR-009/SR-009S, and Audeze CRBN: High-amp.de’s Alpha Centauri V9, Sirius V9, Antares, and Polaris are compatible and highly recommended. The Alpha Centauri V9 is a top choice for the SR-X9000 due to its proven performance, while the Antares may excel with the SR-009/SR-009S for its resolution. The Sirius is a versatile option for the CRBN, offering dynamic timing. Auditioning is advised to match sound signature preferences (e.g., Polaris for analytical sound, Alpha Centauri for relaxed warmth).
• For Sennheiser HE-1 Orpheus: Use the integrated amplifier, as high-amp.de amplifiers are not compatible.
• For Koss ESP-950: Stick with the included E/90 amplifier or explore custom solutions, as high-amp.de amplifiers are not compatible without modifications.
• General Advice: Verify compatibility with your specific headphone model, as high-amp.de focuses on Stax Pro Bias. Contact Andreas Rauenbühler directly via high-amp.de to confirm technical details or inquire about custom configurations. Given the DIY nature, ensure you’re comfortable with the build quality, and audition the amp-headphone pairing if possible to confirm synergy.
I apologize again for the initial confusion with Paltauf GmbH. If you’d like me to explore Paltauf GmbH amplifiers for these headphones, compare specific high-amp.de models (e.g., Alpha Centauri vs. Sirius), or dive deeper into user reviews, please let me know!