Goldring 2300 Moving-Iron Phono Cartridge

Description

Goldring 2300

All Goldring 2000 series cartridges feature Moving Iron
technology. This lends them the high levels of detail associated with more
expensive moving coil designs whilst retaining the convenience of a replaceable
stylus and high output associated with moving magnet types. The cartridge
employs a fixed samarium cobolt magnet and high output coil combination so that
a very light iron/nickel cantilever end-piece can be used instead of the much
heavier permanent magnet used in conventional designs. This reduces the moving
mass of the cartridge allowing the stylus to trace the record groove more
faithfully. Because of their high output, Goldring 2000 series cartridges
should be used with the standard moving magnet phono input of an integrated
amplifier.
Use of an elliptical nude-diamond stylus offers high
frequency clarity and excellent transient response due to its lower tip-mass
compared to bonded types. This record cartridge will upgrade many mid-range
turntables, allowing them to produce an even finer sound.

Moving “Iron” Generator

A diamond stylus tracing the average record groove will
experience accelerations of up to one thousand gravities. This means that in a
moving magnet design the permanent magnet is subjected to similar accelerations
and if its mass is too large its inertia will result in poor transient
response, distortion and mis-tracking of the stylus. The 2000 series cartridges
use a fixed magnet design so that the mass of the magnet is completely isolated
by the compliance of the cartridge suspension and a much smaller and lighter
iron/nickel alloy tube can be used instead. Attached to the cantilever, the
alloy tube is used to perturb the stationary magnetic field provided by the
large fixed magnet and thus provide the changing magnetic flux necessary to
generate the signal voltage in the coils. Modern samarium cobalt magnets have a
super high energy output and so a much lighter magnet can be employed than ever
before giving the completed assembly a similar mass to traditional moving
magnet types. In this way the cartridge enjoys the convenience and flexibility
of a traditional moving magnet design with a replaceable stylus block and a
high output compatible with standard MM input stages. At the same time it
enjoys some of the refined sound and detail retrieval previously only available
from more costly moving coil designs.

Threaded Inserts

The cartridge body benefits from integrated M2.5 threaded
mounting holes which means that it is very easy to mount onto the tonearm
negating the need for fiddly washers or nuts which need to be counter-held
during adjustment.

Frequency Response  
20 Hz – 20 kHz +/- 3 dB

Channel Balance
 within 2 dB @ 1 kHz

Channel Separation
better than 20 dB @ 1 kHz

Sensitivity
6.5 mV ±1.5 dB, 1 kHz @ 5 cm/sec

Static Compliance
35 mm/N

Dynamic Compliance @ 10 Hz
16 mm/N

Vertical Tracking Angle
24°

Stylus Radius
Nude Elliptical

Stylus Type
Replaceable

Cantilever
Alumite

Load Resistance
47 kΩ

Load Capacitance
100 – 200 pF

Internal Inductance
680 mH

Internal Resistance
550 Ω

Cartridge Mass
7.4 g

Cartridge Mass ( inc. fixing screws)
8.6 g

Fixing Centre
0.5″ (12.7 mm)

Playing Weight
1.5 – 2.0 g (1.7 g nom.)