IMPORTANT: Please note that our SHOWROOM IS CLOSED until further notice. But all other services, phone and online orders are working normally. Click here for further info.
Price match offer by Studiospares

Price Match

Excellent support and technical sales team

Excellent Support

We are rated 9.5 on Trustpilot

Rated 4.8 / 5

Free delivery over £149

Free Delivery Over £99 (exclusions apply)

Finance options

Finance Options

  1. Home
  2. Microphones
  3. Splitter / Combiners
  4. Studiospares RED503 Passive Line Combiner
Alternative Image
Studiospares RED503 Passive Line Combiner
Alternative Image 1
Alternative Image 2

Studiospares RED503 Passive Line Combiner

Product Code: 458220

The RED503 combines two balanced inputs to a single output. All inputs and outputs are fully isolated from each other via a transformer...

£24.99 (INC VAT)
58 In Stock0 More Info
Add to Basket Add to Wishlist Print Check out Finance Options here

Delivery Icon

Price Match

We'll match or beat any price

Price Icon

Free Delivery

On Orders over £99 (INC VAT)

  • Description
  • Specifications
  • Reviews
  • Media

Studiospares RED503 Passive Line Combiner

The Studiospares RED503 is a single channel passive line converter, that combines 2x XLR inputs into a single XLR output in a nutshell.



The RED503 features the famous high quality and specification build that the RED500 series is renowned for.


Being manufactured from die-cast aluminium, the 503 like the rest in the RED500 series is ready to withstand any recording situation it's thrown into, whether it be in the studio or out on the road touring every night.


Located on the left-hand side of the unit is 2x balanced XLR input sockets, and on the right-hand side of the unit is 1x XLR output socket and an earth lift switch, perfect for eliminating any unwanted noise or interference you may encounter while using the unit.


All inputs and outputs are fully isolated from each other via the built-in transformer, to ensure you receive the highest quality and the quietest of conversions whilst using the unit. the RED503 is a passive unit, meaning no power supply is required.


This unit is ideally used for the combination of dynamic microphone sources. Some applications of the S503 would include dual micing of percussion instruments, vocals or choirs and even instrument amplifiers.



Available in the RED 500 series are -

Studiospares RED501 Microphone Preamp (Code - 458200)
Studiospares RED502 Bi-Directional Bal/Unbal Convertor (Code - 458210)
Studiospares RED503 Passive Line Combiner (Code - 458220)
Studiospares RED504 Microphone Combiner (Code - 458230)
Studiospares RED505 Line Splitter (Code 458240)
Studiospares RED506 Microhpone Splitter (Code - 458250)



2x XLR Inputs
1x XLR Output
Earth lift switch
Maximum input +20dBu
Response 0.05db down at 20Hz and 20kHz

Customer Reviews

There are no product reviews for this product, why not submit one?