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Stealth Audio's Hyperphono
Tonearm Cables by Stealth Audio
The Hyperphono is, in fact, a three-cable assembly in one package: two identical signal cables, and one more (same diameter, but different inside) run for the ground.
The three cables join at the mini-DIN and run separately from each other, being held together only by a machined Teflon tri-nut that slides back and forth for the most convenient cable arrangement and no hassle connection to any phono preamp or an MC step-up transformer. In the RCA to RCA version, the three cables join at the middle, and run separately to both RCA-terminated ends.
The Hyperphono has STEALTH proprietary, highly advanced custom connectors: Teflon mini-DIN with custom machined Carbon fiber shells (both straight and 90 degrees), and shell-less ultra light proprietary STEALTH RCA connectors (same concept and basic design as the Indra connectors, but no shells, just machined Teflon body with integrated very light weight solid silver contacts; the hollow solid silver center pins have Kevlar inserts, for strength). The XLR version features custom STEALTH XLRs (also with machined Teflon dielectric and solid silver contacts).
The Hyperphono signal path features the multi-layer matrix geometry, which is common for all top STEALTH cables, including the Indra. The conductive wire used is solid core, 50% gold 50% silver, single crystal (continuous cast) alloy. The porous Teflon dielectric assures very low energy storage = high perceived speed of the reproduced signal.
The ground run features our proprietary low resistance (and low inductance!) RF transparent LITZ configuration - to assure high quality grounding up to radio frequencies.
Both signal cables are shielded with metallized carbon fibers, with multiple silver plated OFC drain wires. This is very light weight and efficient shielding. The shields are electrically connected to the ground at a single point (at the ground pin of the miniDIN, or in the middle of the cable assembly (inside the carbon fiber "collar") in the RCA to RCA configuration.
There are two identical solid core signal wires inside each signal cable, symmetrically woven in a matrix geometry which offers high interference and noise rejection without the capacitance increase typical for simple twisted pairs. This symmetry and identical wires mean the Hyperphono is a balanced cable. This is natural for the XLR-terminated version. But the Hyperphono is internally balanced even in the RCA-terminated version.
A phono cartridge is balanced by its nature: the output from each of its two coils (one coil for each stereo channel) is symmetrical - i.e. balanced. The four inside tonearm wires that go from the four cartridge leads through the tonearm tube are all the same - i.e. this path is also balanced. And thus an optimally made phono cable must follow this pattern - i.e. must be balanced (inside) - regardless of whether a phono preamp is balanced or single-ended. The absolute best phono stages are balanced (it simply makes sense to make them balanced - to assure the highest possible interference rejection) - but even with a single-ended phono preamp (terminated with the RCA-type connectors) a balanced phono cable works better than asymmetrical (coaxial): due to its balanced nature, it is considerably less noisy than a traditional single-ended phono cable. Reduced noise is obviously nice all by itself, but its indirect benefit is lower IM distortion, and the result is a readily audible boost in perceived (subjective) clarity of reproduction - compare to any regular phono cable.
The differences in phono cables are much more audible than in line-level interconnects - because of the much smaller signal, and therefore much higher amplification: typical line-level signal is 1 volts, while the typical MC cartridge output is 0.3 millivolts - i.e. 3000 times (!) as low.
The Hyperphono is exceptionally quiet, and it is immediately noticed by all listeners - most of them don't even suspect how quiet their phono setup can actually be!
Because of its numerous highly advanced features (listed above), the Hyperphono sonic advantages are immediately apparent in any high-end phono setup.