Technics EPC-100Cmk2
¥ 65,000 (around 1979)
Commentary
MM type cartridge using pure boron pipe cantilever.
A pure boron cantilever is used for the cantilever. It is molded only from boron, which has the highest specific elastic modulus among existing elements. Moreover, it is difficult to make solid rods. This material is refined into a pipe by a special manufacturing method to realize light weight and high strength. In addition, a laser beam is used for processing a tip mount hole for attaching a needle tip to pursue accuracy. By this, an extremely small effective mass of the vibrator is obtained, and high resonance frequencies are pushed out of the range of audibility.
It uses the Technics Temperature Defence Damper (TTDD) developed by Technics Co., Ltd., which has improved temperature dependency to about 1/3 compared with the commonly used butyl rubber. Moreover, it has excellent viscoelasticity and is a damper material with excellent cantilever support performance. As a result, there is almost no change in sound quality or deterioration in tracing performance due to temperature changes in the room.
The magnetic circuit uses a mirror-polished HPF core for all magnetic materials such as pole pieces and yokes to obtain excellent transmission characteristics.
In addition, the left and right channels are completely separated in the HPF magnetic circuit, and symmetrical arrangement is realized, so that the imbalance between the channels of various characteristics is reduced.
It uses a one point suspension system. A disk-shaped magnet is placed at the base of the cantilever, and it is attached to the support pipe with a suspension wire through the same disk-shaped damper.
As a result, the supporting point is clearly located just behind the magnet, preventing the occurrence of cross-modulation distortion due to the back-and-forth change of the cantilever and the degradation of high-frequency characteristics due to the increase of equivalent mass seen from the needle tip.
By adopting a low inductance design, the effect of addition is suppressed and high performance is exhibited.
In addition, the DC resistance is designed to be extremely small, so that noise caused by the resistance component at the amplifier input stage is reduced and a high SN ratio is obtained.
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Model Rating
| Type | MM Type Cartridge |
| Magnetic circuit | Adoption of mirror-polished HPF core for all magnetic circuits |
| Cantilever | Pure boron pipe |
| Damper | TTDD(Technics Temperature Defense Damper) |
| Magnet | Sm-Co (BH) max30MG / Oe |
| Frequency characteristic | 20 Hz to 15 kHz ± 0.3 dB |
| Frequency range | 10 Hz to 60 kHz |
| Temperature Characteristics (5 ° C to 35 ° C) | ± 1 dB at 10 kHz ± 3 db (20 kHz, 1 kHz standard) |
| Output voltage | 1.3 mv (1 khz, 5cm/sec, zero to peak, horizontal speed) 1.8 mv (1 khz, 5cm/sec, zero to peak, 45 ° speed) |
| Channel separation | 25 dB or More (1 kHz) 20 dB or More (10 kHz) |
| Channel balance | 0.5 dB or Less (1 kHz) |
| Compliance | 12x10-6cm/dyne(100Hz) |
| DC resistance | 30 Ω |
| Inductance | 33mH |
| Impedance | 210 Ω (1 kHz) |
| Recommended load resistance | 10k Ω ~ 1M Ω |
| Recommended load capacity | 500 pF or less |
| Needle tip | Shell Integrated Structure (Magnesium Alloy Used) |
| Oscillator effective mass | 0.23mg |
| Needle pressure range | 1.25g ± 0.25g |
| Mounting | Shell Integrated Structure (Magnesium Alloy Used) |
| Overhang adjustment range | 52 + / - 3 mm (distance from needle tip to shell mounting reference plane) |
| Cartridge tilt angle | ± 2 ° left / right |
| Stylus Guard | With automatic return lock mechanism by button operation |
| Dead weight | 18.3g |
| Exchange needle | EPS-100ED2(¥25,000) EPS-100ED, EPS-101ED can also be used |
| Attachment | Measurement chart Test record |