Decided to try a SPU cartridge


I’ve been fascinated that the SPU (Stereo Pick-Up) cartridges, which was invented over 60yrs ago in 1958, still has loyal fans today. The SPU is reported to have a big, bold, exuberant and musically exciting character.

While researching, the best SPU cartridge may be the Ortofon SPU Century. I found one new at a greatly discounted price so I took the plunge.

Normally, it’s best to demo before purchasing. But because I’m going for sonic variety rather than improvement, the SPU’s sonic description and market longevity is enough for me to feel confident it’ll be a good experience. Besides, trying to track down a SPU demo in this Covid environment may be a pain.

In addition, I’ll probably purchase a Ortofon SPU Classic GM E MkII to experience the “original” SPU sound. Other SPUs I may try are Ortofon’s SPU Meister Silver GM MkII, SPU Synergy GM, SPU Royal GM MkII, SPU Wood A.

Next I’ll have to get a SPU tonearm. The usual suspects are Thomas Schick, Groovemaster II, and Ikeda. I wonder what’s the best SPU tonearm?

I suspect that tonearm cables upgrades won’t yield enough sonic improvements for SPUs.

kennyc

HTA/zenith semantics aside, IMO the use of a standard SPU will benefit greatly from any tonearm featuring an SME style HTA adjustable base.

Here's more information on Horizontal Tracking Angle:

Your cartridge is in perfect alignment on the horizontal plane when a line drawn between the two contact facets form a straight line pointing at the center of the record.

I have considered going the SPU route--so sexy and retro! But I cannot understand how the performance of an SPU can compare with a quality modern cartridge given the chunky mechanicals, high VTF, etc. How can they possibly be as revealing and accurate?

@cleeds on defining HTA:

The SME base allows for adjusting overhang, not HTA. Overhang and HTA are two different things.

I never implied they weren’t.

Overhang adjustment on any conventional radial tonearm will affect HTA - period.

Your image linked to the Audio Technica Headshell accurately displays how one must skew the zenith (HTA) in an slotted headshell when an adjustable HTA armbase such as supplied by SME is not available.