RAAL Requisite SR-1a Ribbon Headphones+case+Silver cable

Raal Requisite SR-1a Ribbon Headphones+case+Silver cable - excellent condition with all accessories and amp/speaker interface box

RRP for headphones is $5390 - RRP for included 7ft silver cable is $1490

I've used various power amps with outstanding results and have a Schiit Vidar (black) near new that I can talk to you about. The ribbon cassettes are replaceable and relatively inexpensive and all of the headband/support parts are also replaceable too. 

Raal Requisite is known for producing high-quality headphones that are highly regarded by audiophiles and professionals in the audio industry. There are a few reasons why Raal Requisite headphones are so highly regarded:

Ribbon Drivers: Raal Requisite headphones use ribbon drivers, which are known for producing sound with great precision and clarity, which makes them ideal for critical listening and mixing applications.
Unique Design: Raal Requisite headphones have a unique design that allows for a highly accurate and detailed sound reproduction. The headphones use a ribbon driver instead of a traditional cone-shaped driver, which allows for a faster response time and better transient response.
High-Quality Materials: Raal Requisite uses high-quality materials in the construction of their headphones, including aerospace-grade aluminum and carbon fiber. These materials are lightweight and durable, which allows for a comfortable fit and long-lasting performance.
Handcrafted: Raal Requisite headphones are handcrafted, which allows for a high level of attention to detail and quality control. Each headphone is individually tested and tuned to ensure optimal performance.

Even compared to headphones already well regarded for their ability to render micro-details, such as Focal’s Utopia, the STAX SR-009S, or the LB-Acoustics MySphere, the SR1a is clearly superior.

Ian Dunmore (@Torq) on Headphones.com

It's a headphone that in my experience outdoes 99% of what I have heard across any headphones in the 20 years that I’ve collected headphones.

The Tech Collector on HeadAmp.com

https://bloomaudio.com/blogs/articles/raal-requisite-sr1a-and-hsa-1b-review

DESCRIPTION

The SR1a by RAAL-requisite is the world’s first Earfield headphone monitor. Experience mixing, mastering, and home listening with unparalleled accuracy and realism in a soundfield devoid of room acoustics and comb-filtering caused by work surface reflections. Earfield™ technology delivers unheard of program accuracy and a speaker-like soundfield experience.

The SR1a is also, the world’s first True-Ribbon headphone. Highly specialized ribbon drivers were developed that reproduce 30Hz to 30kHz bandwidth in order to eliminate the need for sealed chambered bass and allow for open-air baffles (both front and back) for a true full-frequency soundfield.

Professional engineers report that SR1b Earfield Monitors reveal more detail and accuracy than even their finest traditional studio monitors or headphones. Helping to achieve high-quality, transferable mix results in non-traditional environments. The accuracy, musicality and portability of the SR1b frees the engineer to work whenever, and wherever they choose.

SPECS

Headphone Design    Earfield™ open baffle. Floating near ear, does not enclose ears.
Amplifier Interface    Ribbon/Amplifier Interface. 6 Ohms. Use any deently powered headphone amplifier with a 4-pin jack.
Sensitivity    91dB/1W
Max SPL    111 dB
Frequency Range    30Hz – 30kHz
Weight    425 grams