AC Audio Online Music Shop, PA, Pro Audio & Live Sound Specialists

A.C. Audio: Online PA, Pro Audio and Live Sound Specialists Call us on 0113 386 9080 Send us an email: Home

Shure PA421A Four-To-One Super-Wideband Antenna

Four-to-one PSM antenna combiner for all P4T, P6T, P7T, P9T and P10T transmitter (470-952 MHz).
Product Code: SHPA421SWB
Manufacturer: Shure

Call for price

Available within 2-5 working days

We accept Paypal
Shure Pro Audio Reseller LIVE 2017

The PA421A active broadband antenna combiner provides a significant improvement in reception quality for up to four PSM wireless transmitters by combining them to a single antenna. This will reduce intermodulation distortion and also avoid dropouts due to multipath interference.

The PA421A is compatible with the wireless personal monitors Shure PSM 400 PSM 600, PSM 700, PSM 900 and PSM 1000.



  • Combines up to four PSM transmitters to a single antenna set for improved RF networking & reduced rack clutter
  • Quieter fan for significant reductions in ambient unit noise - especially useful for installation work 
  • Temperature-sensitive fan power for significant reductions in ambient unit heat
  • 4 Input LED Signals (green when active; off when inactive)
  • Active-channel amplifier power for additional reductions in ambient unit heat
  • Passive (non-powered) antenna combining
  • RF Carrier Frequency Range: 470-952 MHz
  • System Gain: +0/-5 dB
  • Input AC Line Voltage: 100-240 Vac, 50/60 Hz
  • Maximum Input Line Power: 120 W
  • Maximum Current Drain: 0.42-1.0 Amperes (Amperes = 100 VA/Input AC Line Voltage)
  • Maximum RF Input Power: 24 dBm (250 mW) per channel
  • Input Signal Indicator Threshold: +4 dBm (2.5 mW), +2 dBm (1.6 mW) typical
  • Impedance: 50 Ω nominal


  • UK Based Company
  • Part of A.C. Entertainment Technologies - has its trading origins over 45 years ago
  • UK Stock Holding
  • UK Warranty
  • Free Delivery Over £150
  • Great Prices
  • Over 20 Years' Experience
  • Specialist Advice
  • Fast Delivery
  • Finance Options Available

With years of experience supplying Businesses, Government Organisations, Charities, Schools, Colleges and Universities, we invite you to take advantage of our knowledge to help you make an informed choice, ensuring you are purchasing the best music products for your needs. With specialists in PA Systems, Pro Audio & Live Sound equipment on hand to answer calls and emails, you're in the best possible hands.

Contact us now to discuss your requirements or to request a quotation. Additional discounts may apply for educational establishments or size and value of order.

Purchase orders can be sent directly to or apply for your cash or credit account here. Terms and conditions will apply.

Share This Page

Seen it cheaper?

Dear visitor - firstly, welcome and thank you for visiting the A.C. Audio Online website!

We value your custom and pride ourselves on the customer service we provide to all our customers. As you'll no doubt appreciate, the service we provide comes at a price and consequently we have implemented a minimum order value of £59.99 (including VAT) for all orders placed. Unfortunately, lower value orders are not economically viable due to the administrative costs. Better control of our costs helps to improve our efficiency and allows us to carry on providing the levels of service you've come to expect.

We hope you enjoy your visit and if there is anything you need any assistance with, please don't hesitate to let us know via Email or Phone – we'd love to hear from you.