SP1
The award winning SP1 integrates Muraudio’s high output Continuous Curve projected point source ESL panel with bespoke custom designed six-inch aluminum cone drivers to create a beautiful, immersive, panoramic sound stage. The SP1s full range 120-degree horizontal listening window delivers Muraudio’s signature “Sound is Everywhere®” listening experience with contemporary design and luxurious finishing.
Muraudio’s Mylar Diaphragm Technology (MDT) creates enhanced dynamics through improved distribution of acoustic energy across the continuous curve of the ESL, delivering clear, detailed, natural sound. The SP1s virtually weightless, ultra-light electrostatic film moves with matchless speed and precision, producing ultimate sonic accuracy. The SP1s total harmonic distortion is so low that it is comparable to levels only measured in high end amplifiers.
Electrostatic loudspeakers (ESLs) use electrostatically charged micro-thin polymer film suspended between two perforated aluminum plates to reproduce midrange and high frequencies. They are renowned for their speed and precision, delivering clarity, detail, and natural sound.
The SP1s managed to be very convincing not only in the one centered ideal position but over a wide area... the point-source nature of the imaging felt very natural. And compared to other hybrid electrostatics, well, when the chips are down, most instruments are not line sources. I would strongly urge you to find the Muraudio SP1s at a show or a dealer and spend some time listening to them carefully. This is a landmark speaker design. There has never been anything else like it. It is unique and sounds like real music in a way which escapes most speakers entirely.
- Robert E. Greene, The Absolute Sound
“Either I'm getting old and deaf, or Muraudio has done a close to miraculous job of integrating the four dynamic woofers per channel with their curved electrostatic panel. I didn't even notice that they were hybrids until the thundering bass rolled in on the Mekons' "Diamonds.”
Malachi Kenney, Positive Feedback
The SP1s long throw six-inch aluminum low frequency drivers are paired in two independently sealed cabinets, combined with proprietary, tuned inertial reactionary dampers for tight bass response.
These ultra-rigid drivers accurately reproduce frequencies below 750 Hz, and move so uniformly that modal resonances are inaudible. Over 6 kg of magnet structure provides the necessary force for deep bass extension, achieving F(-3) = 45 Hz (anechoic).
Only professional grade, tight-tolerance premium components are used in the crossover and electronic systems. Air core inductors and Mundorf EVO oil capacitors ensure that critical high frequencies are perfectly reproduced.
The SP1’s high voltage transformer uses a precision wide bandwidth interleaved balanced design with ultra-low leakage inductance, delivering clear highs without coloration, operating at low magnetic fields even at maximum power.
The SP1 ESL panel and driver configuration are designed to produce a polar dispersion pattern similar to the ESL at the 750 Hz crossover, maintaining uniform tonality across wide horizontal positioning.
The SP1’s multi-layer curved cabinet is designed for enhanced stiffness and low resonance. A stable acoustic center is maintained by mounting all drivers symmetrically in a D’Appolito configuration.
“. . . the hand-off between electrostatic and dynamic drivers was undetectable. Singing voices . . . were silky-real, with natural-sounding timbres, good distinctions between head tones and chest tones, and sibilant sounds that were, for once in hi-fi, utterly perfect.“
Art Dudley, Stereophile
SP1 Reviews and Awards
“I think many people are going to find it matchlessly satisfying . . . Muraudio SP1s are among the most remarkable speaker designs to appear in recent years…”
Robert E. Greene, The Absolute Sound
Finishes
Each SP1 is hand finished using state of the art technology to create a luxurious look. Bold colours and rich, real wood textures are available.
Pricing
$22,400 USD per pair in standard colours and wood finishes. Custom paint colours also available.
“. . . as strong in synergy, soul, dynamics, and detail as anything I’ve heard at the show.”
Eric Franklin Shook, Part Time Audiophile
Specifications
Type | Passive Hybrid Electrostatic |
ESL Transducer Configuration | 120 Degree Continuous Curve |
ESL Dispersion | 120 Degree Horizontal x 16 Degree Vertical |
ESL Membrane Area | 1,650 cm2 (active area) |
ESL Membrane Type | Ultra thin tensioned Mylar film (3.8 µm) |
LF Enclosure | Sealed design, curved multi-layer plywood, integrated upper and lower inertial reactionary mass dampers |
LF Alignment | Sealed (Qts 0.72) |
LF Driver Area (Sd) | 340 cm2 (effective area of all 4 drivers) |
Frequency Response | 45 Hz – 20 kHz (+/- 3 dB) Anechoic, 35 Hz – 22 kHz Typical Room with gentle 12 dB/octave roll off of sealed design (versus 24 dB/octave of typical vented designs) |
HxWxD | 147 cm x 39.4 cm x 36.8 cm |
Weight | 45 kg |
Maximum SPL | 103 dB at 2m on axis |
Crossover | 750 Hz analog 2nd order Linkwitz-Riley |
Sensitivity | 86 dB (1W/1m) |
Input | Dual 5-way gold plated binding post |
Impedance | 8 Ohm (nominal) 2 Ohm minimum at 20 kHz |
Input Power | 125 Watts Nominal (RMS) 250 Watts Maximum (Program Peak) Recommended amplifier 50-125 Watts RMS into 8 ohms |
