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by • November 10, 2014 • Adventures in AnalogComments (0)2208

45rpm: An Introduction

Life at 33⅓ suits most folks just fine but some listeners want to hear the sonic nuances in the full dynamic range of recordings and have developed a fondness for the fast lane; 45rpm. The accelerated speed spans acoustic information over a larger section of the disc, etching a path that is easier for a stylus to track and thus provides greater accuracy in sound reproduction. This distinctive trait typically means that any single disc cut at 33⅓ will become a two-disc set at 45rpm. With vetted professionals like Steve Hoffman and Kevin Gray behind the reissue series from labels including Analog Productions paired with the strictly limited edition status of most of these products, both the experience and collectability value are second to none.

Probably the biggest trade-off in the upgraded sound quality is getting up that much sooner to flip a record; about every 10 minutes. Yes, that’s seriously a complaint for some listeners. The mathematics behind this shortened playtime are not terribly complicated and Acoustic Sounds has a a great PDF that explains their process and provides extensive rational for the format. In short:

  • At 33⅓, a record takes 1.8 seconds to complete a revolution, tracking more territory at the outer-edge than toward the inner-grooves. As the cartridge moves closer to the inside of the disc, tracking ability decreases, detail is lost in high frequencies and distortion is audible.
  • At 45rpm, a record is spinning at a rate 35% faster than at 33⅓, meaning there is a 35% reduction in groove curvature.
  • Spanning an album over two discs (a one-disc album at 33⅓ into two discs/four sides at 45rpm) keeps music away from the inner-grooves where distortion and quality suffer most.

Beach House - Bloom

If you’re thinking this is a fringe market, you’re half right. At $50+ apiece, reissue records from Analogue ProductionsMusic Matters or other audiophile labels aren’t cheap. But 45rpm isn’t isolated to these higher-end markets entirely. Labels and artists alike are taking note and some are issuing releases more frequently at 45rpm. For instance, Bloom by Beach House from Sub Pop records (2012) is a double album mastered at 45rpm or more recently, Shade Themes from Kairos by Ambrachi, O’Malley and Dunn from Drag City (2014) has one disc at 45rpm and one at 33⅓. Both are readily available and priced at between $20-$25ish here locally.

The benefits of a 45rpm pressing are not as fiercely debated because the distinguishing characteristics present are easy to identify; you can visually see the differences in discs. Average listeners can appreciate the depth and presence of sound and the connection to the music is more real as the sonic quality is unencumbered by the geometrical limitations of a standard record. But for the average buyer, the financial reality of buying one record at $50 in place of a few at lower price points all depends on a budget and willingness to flip a record more frequently.

The guarantee, at least in my opinion, is that if you do buy a 45rpm reissue from a reputable label, you won’t be disappointed.

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