The complete guide
Where this microphone sits if you're building a podcast setup on a budget: the Superlux E431U
At £54.99, the Superlux E431U sits at the accessible end of the podcasting microphone market, and it is worth being clear-eyed about what that price does and does not buy you.
On the Superlux E431U specifically, Superlux states: Switchable directional characteristic: Cardioid / Figure-8 / Omnidirectional; Capsule type: 2x 14 mm Back-electret (condenser); Frequency response: 20 - 20,000 Hz. At £54.99 it sits in the mid-range tier of this catalogue, and those specific figures (not just the USB connection type) are what should decide whether it fits your setup over another Superlux model or a different brand at a similar price.
What it reliably buys is a genuine step up from a laptop's built-in microphone or a basic headset mic: dedicated capsule design, a polar pattern chosen for speech rather than general-purpose recording, and (on USB models) a proper analogue-to-digital converter rather than whatever chip happens to be built into your computer.
What it does not buy is the last, smaller gains that separate a good home recording from a studio one — those come from room treatment, consistent mic positioning, and post-production, all of which cost time rather than money and matter more than most beginners expect.
For a first microphone, or a second one for a co-host, the Superlux E431U is a sensible place to start: it removes the most obvious quality gap without committing serious budget to a category where the returns diminish quickly past a certain price.