Tools · Cartridge database

Ortofon SPU #1 E

MC cartridge

Published figures

Type
MC
Mass
30 g
Compliance
10 cu dynamic at 10 Hz
DC resistance
7 Ω

Checked against the manufacturer's published specification.

Open in the resonance calculator

On the Clear Wave — 11 g

Hz
481216 Hz

With the ceramic headshell spacer (13 g): — Hz

Assumes 0.5 g of mounting hardware.

This cartridge is an integrated unit with a bayonet collar. It needs a tonearm with a universal (removable) headshell, so it cannot be fitted to the Clear Wave or to any other fixed-headshell arm — whatever the arithmetic would say.

Tonearms that suit it

1 of the 2 arms in our register that this cartridge can be mounted on put it between 8 and 12 Hz. Closest to the middle of the band first.

TonearmResonance
Ortofon AS-212R (without headshell) 8.2 Hz

On other arms

Arm effective massResonanceVerdict
8 g 8.1 Hz ✓ in the 8–12 Hz band
10 g 7.9 Hz below the band
12 g 7.7 Hz below the band
14 g 7.5 Hz below the band
16 g 7.4 Hz below the band
20 g 7.1 Hz below the band

Figures are as published, with the measurement standard recorded where the maker states it and assumed from convention where they don't. Compliance measured at 100 Hz or quoted as static is converted to an estimate at 10 Hz and marked with a tilde; treat those results as approximate. Suspensions also vary between samples and drift with age, so a calculated resonance is a guide, not a verdict. And a resonance figure only means something if the cartridge can be mounted at all: Ortofon's SPU range needs a tonearm with a removable bayonet headshell, so those rows say so instead of showing a figure for the Clear Wave. Spotted an error? Tell us at info@boolaudio.com and we will check it against the source.

Manufacturer and cartridge names are the trademarks of their respective owners. Bool Audio is independent of them all, and none has endorsed this database.

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Who makes these

Bool Audio is a father and son making hi-fi components in a small UK workshop. We build the Clear Wave unipivot tonearm and the Clear Wave 2.0 tonearm cable, both for the Linn LP12. These calculators began as our own bench arithmetic. They are free to use, there is nothing to install, and they take no view on which cartridge you should own.