Shure 450 Series II

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Page last updated May 20, 2026

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The 450 Series II Dynamic Desktop Microphone by Shure

The Shure 450 Series II is a rugged dynamic desktop microphone designed primarily for paging, dispatching, and voice communication systems in schools, offices, warehouses, and industrial environments. It features an omnidirectional pickup pattern and a frequency response tailored for clear speech intelligibility, making announcements and communication easy to understand. A locking press‑to‑talk (PTT) switch lets you either hold to speak or lock the mic “on” for extended messages. The unit also includes a dual‑impedance switch, allowing selection between high and low output impedances to match different systems. Built with a tough ARMO‑DUR® case and adjustable height, it’s made to withstand heavy use. Though now discontinued, it remains known for reliability in fixed communication installations.

Specs:

• Model: Shure 450 Series II desktop microphone
• Transducer Type: Dynamic
• Polar Pattern: Omnidirectional
• Frequency Response: approx. 200 Hz – 5 kHz (optimized for voice)
• Impedance:
• High: ~30 kΩ
• Low: ~225 Ω
• Output Level (1 kHz, open circuit):
• High: ~–35 dBV/Pa (≈17.8 mV)
• Low: ~–57 dBV/Pa (≈1.4 mV)
• Recommended Load: High: 100 kΩ; Low: 1 kΩ
• Cable: 2.1 m (7 ft.) four‑conductor, shielded, non‑detachable
• Switches: Locking Push‑to‑Talk; Impedance selection slide switch
• Housing: Two‑tone gray ARMO‑DUR®
• Dimensions: Approx. 101 × 236 × 144 mm
• Weight: ~737 g (1 lb 10 oz)

Videos

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Radionut63

SHURE MODEL-450 PART 1

Radionut63

I found a mic in an abandoned building - Shure 450 Series II

Cameron Zamot

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thetrespasers

223

5 months ago

Good overall mic, Great for radio vocals!

I use this mic in my band for a radio effect on vocals, it is amazingly good at cancelling background noise, making it great for studio or live situations! While I had to change the connector to make it XLR, it was definitely worth it, it has a lo-fi effect just naturally, but still great clarity, it has a PTT (push to talk) button, which you can lock in place so you don't have to press it to use it, these are commonly used in schools, but I feel they should be more common in studios, they're also great as a talkback mic. In conclusion, worth the money!