Frequently asked questions

Cryogenics (3)

What is Cryogenics?

Cryogenics is the study of the production of very low temperature (below −150°C, -238°F or 123K) and the behavior of materials at those temperatures.

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What is the effect of cryogenic treatment of metal?

During the cooling or solidification phase of the wire manufacturing process, molecules are trapped in a haphazard pattern. This random placement causes obstacles for electrons when encountered. This interference can cause noise, slow down electron flow and will negatively affect … Continue reading

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What are the benefits of cryogenics for audio cables?

Audio cables gain a number of performance benefits when the metal wire and connectors are cryogenically treated. Reduction of sibilance in the lower treble range. An example would be the ‘sss’ with female vocalists. Increased depth of soundstage, allowing the … Continue reading

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 Interconnects (2)

One opinion on shielding

Here is an interesting discussion on shielding from Graham Slee, who makes high quality phono preamplifiers. In a nutshell, Graham makes the case that all interconnects need to be fully shielded with the shield connected at both ends of the … Continue reading

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What are the electrical specifications for your interconnect cables?

OCC copper interconnects Model Resistanceohms/km (at 20C) CapacitancePF/m (1kHz) Impedanceohms InductanceuH/m (1kHz) Impact SE Interconnects (RCA) 26.4 32 34 0.33 Impact SE Interconnects (XLR) 26.4 35 34 0.33 Impact SE Phono Cables 22.0 23 45 0.25 Statement SE Interconnects (RCA) … Continue reading

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Speaker Cables - Testament (1)

Are the Testament speaker cable conductors 14awg solid core, litz or regular stranded?

The conductors are comprised very of fine stranded bare OCC copper wire. 180 individual strands, Teflon insulated, 14AWG aggregate gauge.

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Jelco Tonearms and Accessories (14)

Have you experimented with the Yamamoto headshells? they have several models, Carbon Fiber, titanium and exotic woods.

No experience with the Yamamoto headshells, however if you do a Google search you can read the comments in some of the audio forum threads (VinylEngine, LencoHeaven, etc). The Jelco HS-25 which comes with the 750 tonearms is 12g in … Continue reading

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Have you had any experience with installing the Jelco SA-750D tonearm on a Lenco 75 turntable? Will an extra mount or modifications be needed?

Many people are running the  Jelco SA-750D tonearm on a Lenco L75 turntable.   The Jelco mounting base (30mm diameter hole required) will fit in the Lenco armtube hole and you simply bolt it to the top plate. The Lenco … Continue reading

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Is the Jelco JL-45 Tonearm Lift used on all the current Jelco tonearms?

The Jelco JL-45 Tonearm Lift is used all current Jelco tonearms, SA-250ST, SA-250, SA-750.

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I have a vintage turntable with a tonearm which I believe was made by Jelco. Is the Jelco JL-45 Cueing Device an appropriate replacement for this.

The Jelco JL-45 Cueing Device (Tonearm Lift) is compatible with a number of ‘OEM’ Jelco tonearms, but there have also been instances where an “OEM” Jelco arm looked the same as a Jelco model, but there were differences and the … Continue reading

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Is the Audioquest PT6 tonearm the same as the Jelco SA-250ST?

The two tonearms are very similar but are not identical. Jelco manufactured all of the Audioquest PT6 tonearms. Also the Audioquest tonearms are discontinued so that SA-250ST may have some design improvements. Here is the information on the Audioquest PT6 … Continue reading

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Jelco Tonearm Anti-Skate

Jelco tonearm anti-skate design on the current tonearm  models SA-250ST, SA-250, SA-750 is simple, yet quite precise. In the “zero” position, the spring wire does not make contact with the rotating arm pivot, so there should be no anti skate force … Continue reading

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I have a Rega 301 on a Linn LP12 and would like to know if a swap to a Jelco SA-750D tonearm is easy.

You need to determine what the pivot to spindle distance is on your actual tonearm.   Here is the pivot to spindle distance for the various tonearms: – Linn tonearms are 211mm – Jelco 750D is 214mm – Rega RB301 … Continue reading

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Jelco appears to offer three different headshells. Which one comes standard with the SA-750 tonearms.

Jelco offers three headshell models: HS-25 is the premium headshell, provides azimuth adjustment, and is the included with the SA-750 tonearms. It is 12g. HS-20 looks similar to the HS-25 and also offers azimuth adjustment. The main difference is that … Continue reading

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Do the Jelco tonearms fit the Linn tonearms. Can I simply swap the arms or will I have to make adjustments.

The Linn arms are normally 211mm pivot to spindle. The Jelco SA-250ST is 210mm pivot to spindle. The Jelco SA-250, SA-750D, and SA-750DB are 214mm pivot to spindle. The small difference in length can be eliminated by making a slight … Continue reading

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What is the effective mass of the Jelco 750 tonearms.

The effective mass of the Jelco 750D 9″ tonearm with the standard headshell but without cartridge is 13.48g. Here is correspondence from Jelco, Haruo Uchida/Sales Manager SA-750D effective mass is 13.48gr without cartridge( effective mass is 19.23gr with 6.5gr cartridge). We … Continue reading

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Are the Jelco SA-750 tonearms a J type or S type arm?

All the Jelco SA-750 tonearms (9″, 10″, and 12″) are ‘S’ type arms.

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What type of arm mount is used by the Jelco tonearms?

All Jelco tonearms use a standard Linn tonearm mount. Here is the mounting template for the 12″ SA-750DB tonearm. The mount for the 9″/10″ SA-750, 9″ SA-250, 9″ SA-250ST. Jelco SA-750LB mounting template From the drawing one can see that … Continue reading

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Would a 10″ Jelco 750 fit on a 14″ long tonearm board?

Yes. The 10″ Jelco SA-750E (Chrome) and SA-750EB (Black) both fit comfortably on a 14″ long tonearm board/plinth. For our customers convenience, we have scanned the tonearm mounting template for each tonearm in PDF form (link found in the product … Continue reading

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What is the mass of the Jelco 750 standard and heavy counterweights?

Mass: 750D – 9″ – Standard 129g – Heavy 166g 750E – 10″ – Standard 157g – Heavy 212g 750L – 12″ – Standard 160g – Heavy 212g Diameter: 750D – 9″ – Standard 1.24″/31.5mm – Heavy 1.31″/33.4mm 750E – … Continue reading

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Digital Cables - Statement Silver S/PDIF (1)

Why is 1.5m the ideal length for a RCA/BNC digital cable?

Using a digital cable of at least 1.5m in length dramatically reduces the effect of signal reflection (from the receiver back to the transmitter) in typical audiophile equipment. Reflection contributes significantly to jitter in the digital signal. And of course … Continue reading

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