Mobile Fidelity Sound Lab – Geo-Disc Cartridge Alignment Tool

$59.95

Mobile Fidelity GEO-DISC Stylus Alignment Protractor: The Most Accurate and Most Affordable Cartridge Alignment Gauge for More Than Three Decades and Counting
The Mobile Fidelity Sound Lab GEO-DISC stylus alignment protractor makes cartridge setup easy!
You will never realize the full potential of your cartridge without properly setting it up, but let's face it: Mounting and aligning a phono cartridge can be a tedious and time-consuming chore.
Not with the Mobile Fidelity Sound Lab GEO-DISC!
Simply put GEO-DISC on your platter as you would a record, and align your cartridge using the simple printed graph based on the Baerwald alignment curve.

Free standard US shipping
Contiguous 48 states & DC · 4–7 business days total

30-day returns
Merchant-paid return shipping. Read the policy

Questions about this item? [email protected]

Product brand: Mobile Fidelity

SKU: N08-C15-548EFD050CB1 Category: Stylus & Cartridges

The details

Meet your next everyday essential.

Mobile Fidelity GEO-DISC Stylus Alignment Protractor: The Most Accurate and Most Affordable Cartridge Alignment Gauge for More Than Three Decades and Counting
The Mobile Fidelity Sound Lab GEO-DISC stylus alignment protractor makes cartridge setup easy! You will never realize the full potential of your cartridge without properly setting it up, but let's face it: Mounting and aligning a phono cartridge can be a tedious and time-consuming chore. Not with the Mobile Fidelity Sound Lab GEO-DISC! Simply put GEO-DISC on your platter as you would a record, and align your cartridge using the simple printed graph based on the Baerwald alignment curve. It's that easy!
Nobody who owns vinyl LPs should be without this essential device. Plus, it comes with the 100% Music Direct Satisfaction Guarantee.
"[The] Geo-Disc is the only alignment protractor most vinyl enthusiasts will ever need."—Stereophile, 2026 Recommended Component
"If you feel like turntable/cartridge setup is over your pay grade, and are daunted by complicated tools, consider the Geo-Disc from MoFi…. [It] will get your analog front end sounding good. And, the Geo-Disc is the perfect tool to de-mystify analog setup."—TONEAudio

Know the fit

Specifications & selected options

Item: Mobile Fidelity Sound Lab - Geo-Disc Cartridge Alignment Tool
SKU: N08-C15-548EFD050CB1
Product brand: Mobile Fidelity

For a measurement or material that is not stated on this listing, contact us with the SKU before ordering.

Choose & use with care

A few details before you begin.

Confirm your cartridge or turntable model

Confirm your cartridge or turntable model. Compare the information published for the exact item and keep the product name or SKU for reference.

Compare the part code and dimensions

Compare the part code and dimensions. Check the selected listing and variant, including the supplied components before ordering.

Follow model-specific handling instructions

Follow model-specific handling instructions. Use the directions supplied for your selected item. Contact support if an important detail is missing.

Follow the instructions supplied for the exact product. Features, limits and care directions are specific to the selected model.

Delivery, returns & support

Order preparation takes 1–3 business days, followed by 3–4 business days in transit: 4–7 business days in total. Standard shipping is free to the contiguous United States and DC, with no minimum order.

Request a return within 30 calendar days after delivery. We pay return shipping. After receipt, inspection and initiation of an approved refund take 5–7 business days.

Shipping Policy ↗Returns & Refunds ↗

Before you decide

Product questions

Where should I start when choosing turntable & vinyl accessories?

Confirm your cartridge or turntable model. Read the actual item description, included parts and options. The collection contains different models; a feature stated for one item should not be assumed for every product.

How do I check the size or fitting?

Compare the part code and dimensions. Compare the dimensions and compatibility stated for the selected item with the space or equipment you intend to use. If a required measurement is absent, send the product name or SKU to [email protected] before purchasing.

Are different colors or configurations available?

Available choices are shown on the individual product page. Select the actual option labels before adding a variable product to your cart. Photos and specifications should be read together with that choice; availability is specific to the selected configuration.

What should I check before using an item?

Follow model-specific handling instructions. Follow the instructions supplied for the exact model. Do not assume that all items have the same materials, installation method, care directions or intended use.