Why the cartridge matters more than you think

The cartridge is the point where the whole analogue chain begins. Every groove undulation your stylus traces becomes an electrical signal, and everything downstream — phono stage, amplifier, speakers — can only work with what it receives. It is genuinely common to spend a few hundred pounds on speakers and hear less improvement than you would from a well-chosen cartridge costing a fraction of that.

If your turntable came with a budget moving magnet fitted as standard, it was chosen to hit a price, not to flatter your records. Moving up to something like a mid-range moving magnet or a high-output moving coil can bring noticeably clearer treble, a more open midrange and tighter, better-defined bass. The difference is not subtle on a decent system, and it is often the single best value upgrade in vinyl playback.

Compliance and effective mass: the pairing that catches people out

Before you buy anything, you need to understand compatibility. Every tonearm has a mass, and every cartridge has a compliance rating describing how springy its suspension is. Get the pairing wrong and the arm will struggle to control the stylus in the groove.

Low-mass arms, common on many older British belt-drive decks, suit high-compliance cartridges. Heavier, medium-mass arms — a Rega RB-style arm being a good example — generally prefer low or medium compliance designs. A mismatch in the wrong direction can cause a resonance peak in the audible bass region, which shows up as bloated, one-note bass or a tendency to mistrack on warped records. The technical term is the arm-cartridge resonance, and it should sit somewhere between roughly 8 and 12 Hz. Most manufacturers publish compliance figures, and many dealers will do the calculation for you if you give them your deck and arm model.

• Check your arm's effective mass in grams.
• Check the cartridge's dynamic compliance, usually quoted in cu.
• Aim for a resonance between 8 and 12 Hz.
• If you are unsure, ask before you buy — it takes two minutes.

Weight, tracking force and balance

The second practical check is physical mass. Cartridges typically weigh between about 5g and 9g, and if your arm has a fixed counterweight with limited adjustment range, a heavy cartridge may simply not balance. Some arms offer optional heavier counterweights — worth knowing before you commit.

Then there is tracking force. Your new cartridge will have a recommended range, and it is worth starting near the upper end of the manufacturer's suggestion and working back if you hear sibilance or distortion on inner grooves. Buy a small digital stylus gauge; they cost very little and are far more accurate than the markings on the counterweight.

Adjust vertical tracking angle too. If the new cartridge is taller or shorter than the old one, the arm will sit at the wrong angle and you will lose clarity and bass definition. Arm height adjustment, or a shim under the headshell, usually sorts this out.

Moving magnet or moving coil?

Moving magnet cartridges are the sensible starting point for most UK listeners. They put out a healthy signal, work with the moving magnet input on virtually every integrated amplifier and phono stage, and you can replace the stylus yourself. Something at the upper end of the moving magnet range will transform a budget deck.

Moving coil cartridges generally resolve more detail and sound more refined, but they come with caveats. Low-output models need a dedicated step-up transformer or a phono stage with moving coil capability. They are also more expensive to retip, and the stylus is not user-replaceable. High-output moving coils split the difference — they work into a moving magnet input while offering much of the moving coil character.

If your phono stage is the weak link, be honest about it. A superb cartridge feeding a mediocre phono stage will flatter neither. Budget for both if you can.

Setting it up properly

Fitting a cartridge well takes an hour and rewards you for years. Work on a clear table with good light, and keep the stylus guard on until the last moment. Use proper alignment — a printed protractor or an alignment gauge matched to your arm's geometry. Tracking error causes distorted treble and uneven wear across the record side.

• Set overhang and alignment accurately before anything else.
• Set tracking force with a digital gauge, not the dial.
• Set anti-skate to roughly match the tracking force as a starting point.
• Check azimuth so the stylus sits vertically in the groove.
• Run the cartridge in for 20 to 30 hours before judging it.

Also check your turntable is level, the belt is in good condition if you have one, and the main bearing is clean and correctly oiled. No cartridge can compensate for a deck that is not running properly.

What to expect and how much to spend

Set realistic expectations. A cartridge upgrade will not make a scratched record sound new, and it will not add bass your speakers cannot produce. What it will do is reveal more of what is already there: cleaner cymbals, more separation between instruments, voices with better body, and bass that stops and starts rather than smearing.

As a rule of thumb, spending between £100 and £300 on a cartridge for a mid-range deck is a sensible place to start, and it is worth going a little higher if the rest of your system is capable. Beyond a certain point, diminishing returns set in hard and your money is better spent on a phono stage or a better stylus profile.

Buy from a dealer who knows your deck and will talk you through compliance and mounting. If you are not confident fitting it yourself, many shops will install and align it for a modest fee. That single hour of professional setup is often the difference between a good cartridge and a great one.