The classic 1U patch panel design with ¼” TRS Jacks allowing instruments to be plugged directly into the patchbay.  With two rows of 24 sockets, Half and Full normalling on all channels and a choice of rear connectors, the Isopatch is one of the most versatile patch panels available.  A neat slide-in labeling system tops off a design that’s good looking, durable and easy to use.

£255.90£380.35 Inc VAT

(Discounts Applied in the Shopping Cart)
QuantityDiscountDiscounted price
5 - 95%-
10 +10%-
SKU: CPJ48 Category:

A timeless classic

The original Isopatch was introduced in 1985 and became an instant success.  Now, nearly 40 years on, it’s still be one of our best-sellers.

At the front, the fully-enclosed connector design helps to keep out the contaminants that shorten contact life.  A smart nickel-plated ring gives an improved ‘feel’ when plugging/unplugging and our neat slide-in labeling system makes designation of signals easy and neat.  All in all, one of the coolest looking patch panels you’ll see in any studio!

  • Two rows of 24 type A Jacks in 1U of rack space
  • New enclosed Jack design keeps out dust and dirt
  • Jack, RCA phono or direct solder rear connections
  • Half and full normalising available on all channels
  • Suitable for balanced/unbalanced and stereo signals
  • Lacing Bar Kit available for extra rear cable support
  • Neat and easy slide-in strips for socket designation
  • Suitable for insert points without special leads
  • Gold contact versions also available
  • PCB parallel points for every Jack

Lateral board design

The Isopatch has all its connectors mounted on two horizontal printed circuit boards (PCBs).  This type of design not only eliminates most of the wiring, but also adds rigidity so there’s no flexing of the panel in use.  Flexible jumper cables carry normalled signals between top and bottom boards and allow access for servicing if needed.

Flexible normalling

The Isopatch is supplied with all sockets isolated, but Half or Full normalling is available on every channel by simply soldering across special ‘program pads’ on the top PCB – No special tools are needed and there’s nothing to take apart. In fact, if the Isopatch is already installed, you don’t even have to unplug the rear connectors – Just a few blobs of solder and it’s done.

Contact and rear termination options

The Isopatch can be used for most types of audio signal including mono, stereo, balanced and unbalanced lines.  The standard version comes with silver-plated contacts, but gold-plated versions are also available.  Rear connections are via board-mounted D-sub, Jack, or direct solder termination.

PCB Layout

Circuit Diagram

Compatible with most types of audio

Full or half normalling on every channel


48 Way

Front Sockets

6.4mm Jack (1/4" Type A)

Front Socket Contacts

CPJ48* Silver plated phosphor-bronze, CPJ48*G Gold plated phosphor-bronze


Half and full normalising programmable on every channel

Rear Termination

CPJ48D Rear 25-way Dsub Female, CPJ48J ¼" type A Jack sockets, CPJ48P RCA phono sockets, CPJ48T Direct solder terminations

Switch Contact Resistance


Switch Contact Life

>10,000 operations


CPJ48D W483 x H45 x D72 mm, CPJ48J W483 x H45 x D81 mm, CPJ48P W483 x H45 x D71 mm, CPJ48T W483 x H45 x D70 mm

Net Weight

CPJ48D 935g, CPJ48J 970g, CPJ48P 890g, CPJ48T 780g