500ADAT ADAT Expander & 8-slot 500 Series Rack
8in/8out ADAT Interface
- Ultra low-latency ADAT Interface with SMUXII/IV transport
- 8 channels at 44.1-96kHz, 4 channels at 192kHz.

High-performance A/D conversion
- Dynamic Range: 121dB A-weighted, AES17 method, 20Hz - 20kHz
- Frequency Response: -1dB, 2.2Hz to >80kHz
- THD+N: <0.00032% (-110dB) @ -4dBFS, 20Hz - 40kHz, 1kHz, A-weighted
- Max Input Level: +24dBu

High-performance D/A conversion
- Dynamic Range: 121dB A-weighted, AES17 method, 20Hz - 20kHz
- Frequency Response: -1dB, <1Hz to >61kHz
- THD+N: <0.0003% (-110.5dB) @ -4dBFS, 20Hz - 40kHz, 1kHz, A-weighted
- Max Output Level: +24dBu

Master reference-quality internal clock
- Capable of 44.1, 48, 88.2, 96, and 192kHz operation
- <0.5ps of jitter
- Dedicated Word Clock Input and Output via BNC
- External sync options using Word Clock BNC or ADAT
Analogue summing mixer
- 8-into-2 analogue summing mixer with 26.5dBu of headroom and dedicated balanced 1/4" jack outputs.
- CAST link port for increased expandability when used with Cranborne Audio 500R8 (sold separately).
Zero-latency artist mixer 
- Zero-latency analogue artist mixer with physical level/pan controls per channel and Aux Input blend controls.
- 2 high-power headphone outputs with independent blend and level controls
Reference-Quality Headphone Outputs
- THD+N: <0.0006% (-104.4dB) @ 20dBu, 1kHz, A-weighted, 300ohm load
- Output Wattage (1kHz): 250mW x 2 @ 600 ohms, 650mW x 2 @ 220 ohms, 1.21W x 2 @ 100 ohms, 500mW x 2 @ 32 ohms
-Frequency Response: 1dB, <1Hz to >70kHz
High-current 8-slot 500 series rack
- 250mA current per-slot with headroom
- XLR inputs, XLR line outputs, TRS Inserts (pre-ADC) per 500 series slot
- Module source switching options to send Analogue, ADAT or external CAST signals through your favourite 500 series modules
- Module bypass switches per-slot allowing 500ADAT to be used without 500 series modules inserted
CAST Compatible
- CAST ports per channel for relocating analogue I/O around studio using passive or active CAST breakout boxes via standard shielded Cat 5 (boxes coming soon).
24v, 5 amp external locking power supply
- External power supply for improved analogue audio performance and heat dissipation.
Designed, Engineered, and Manufactured In The UK
- Each and every 500ADAT is extensively tested by a team of dedicated engineers to ensure reliability and consistency.
Please follow the button below to read the 500ADAT User Manual
500ADAT User Manual
Thanks for checking out the app guides tab. We're still working on all the app guides at the moment - they've got to be right! - but as soon as they are finished, we will make sure they are available for you all to see.


Here is the comprehensive set of 500ADAT’s technical specifications. We try to keep our specifications as real-world measurements. Each test has been carried out in a particular way to replicate how each element of 500ADAT would perform in day-to-day operation.


All specifications are typical performance unless otherwise noted. All specifications are subject to change at any time. Tested with Audio Precision APx555 at 192 kHz internal sample rate and internal clock. HF response of digital measurements will vary depending on sample rate selected during recording.
Digital Performance
A/D Conversion
Test Signal Path XLR Input - 500 Series A/D Converter - APx555 (ASIO)
Frequency Response -1dB, 2.2Hz to >80kHz
  -0.05dB, 20Hz to 20kHz
THD+N <0.00032% (-110dB) @ -4dBFS, 20Hz - 40kHz, 1kHz, A-weighted
  <0.00065% (-104dB) @ -1dBFS, 20Hz - 40kHz, 1kHz, A-weighted
THD <0.00014% (-117.5dB) @ -8dBFS, 20Hz - 40kHz, 1kHz, A-weighted
  <0.00023% (-113dB) @ -4dBFS, 20Hz - 40kHz, 1kHz, A-weighted
  <0.0006% (-105dB) @ -1dBFS, 20Hz - 40kHz, 1kHz, A-weighted
Dynamic Range 121dB A-weighted, AES17 method, 20Hz - 20kHz
Max Input Level +24dBu
D/A Conversion
Test Signal Path 500 Series D/A Converter - Insert Send - APx555 (ASIO)
Frequency Response -1dB, <1Hz to >61kHz
  -0.05dB, 20Hz to 20kHz
THD+N <0.0003% (-110.5dB) @ -4dBFS, 20Hz - 40kHz, 1kHz, A-weighted
  <0.0004% (-108dB) @ -1dBFS, 20Hz - 40kHz, 1kHz, A-weighted
THD <0.00014% (-117.5dB) @ -8dBFS, 20Hz - 40kHz, 1kHz, A-weighted
  <0.00018% (-115dB) @ -4dBFS, 20Hz - 40kHz, 1kHz, A-weighted
  <0.00036% (-109dB) @ -1dBFS, 20Hz - 40kHz, 1kHz, A-weighted
Dynamic Range 121dB A-weighted, AES17 method, 20Hz - 20kHz
Max Output Level +24dBu
Jitter <0.5ps
Analogue Performance
Line Outputs (Aux 1+2, Mix)
Test Signal Path Aux Input - Line Outputs - APx555 (Line In)
Connection Type 1/4" Jack, Impedance Balanced
Output Impedance 150ohm balanced, 75ohm unbalanced
Max Output Level <+22dBu
Freq Response -1dB, 1.4Hz to >80kHz
THD+N <0.003% @ +18dBu, 1kHz
Dynamic Range 105dB A-weighted, AES17 method, 20Hz - 20kHz
Noise Floor <-93dBu A-weighted, 20Hz - 20kHz, (Unity Gain)
Summing Mixer
Test Signal Path XLR Input - Summing Mixer Bus (Unity) - Mix Output - APx555 (Line In)
Freq Response -1dB, 2.25Hz to >80kHz
  -3dB, 1.2Hz
  -0.5dB, 3Hz
THD+N <0.0007% @ +23dBu, 1kHz
THD <0.0003% @ +14dBu, 1kHz
  <0.0004% @ +20dBu, 1kHz
  <0.00055% @ +23dBu, 1kHz
Dynamic Range 108dB A-weighted, AES17 method, 20Hz - 20kHz
Max Contribution Level +28dBu
Pan Law -4dB
Noise Floor (Mix Output) -90dBu, A-weighted, No channels routed
  -89.5dBu, A-weighted, 1 channel routed (Unity)
  -84dBu, A-weighted, 8 channels routed (Unity)
Headphone Amp
Test Signal Path Aux Input - Headphone Output - APx555 (Line In)
Frequency Response -1dB, <1Hz to >70kHz
THD <0.0006% (-104.4dB) @ 20dBu, 1kHz, A-weighted, 300ohm load
THD+N <0.00085% (-101.4dB) @ 20dBu, 1kHz, A-weighted, 300ohm load
Output Impedance 0.33 Ohms
Output Wattage 250mW x 2 @ 600 ohms, 1kHz
  650mW x 2 @ 220 ohms, 1kHz
  1.21W x 2 @ 100 ohms, 1kHz
  500mW x 2 @ 32 ohms, 1kHz
Dynamic Range 114.5dB A-weighted, AES17 method, 20Hz - 20kHz, 300ohm load
Noise Floor -93.5dBu A-weighted, 20Hz - 20kHz, 300ohm load
System Performance
Analogue Path Phase Performance
Test Signal Path XLR Input - Empty 500 Series Slot - Summing Mixer Bus (unity) - Mix Output - APx555 (Line In)
Phase <1.5° @ 20Hz, <11° @ 20kHz
Test Signal Path XLR Input - Camden 500 Preamp (Mic Mode, 6dB Gain) - Summing Mixer Bus (unity) - Speaker A Output - APx555 (Line In)
Phase <3° @ 20Hz, <13.5° @ 20kHz (Preamp mic mode, 6dB Gain)
Digital Round-trip Performance
Test Condition 500 Series D/A Converter - 500 Series A/D Converter - APx555 (ASIO)
Dynamic Range 118dB A-weighted, AES17 method, 20Hz - 20kHz
THD+N <0.0004% (-108dB) @ -4dBFS, 20Hz - 40kHz, 1kHz, A-weighted
AC Requirements 100V – 240V AC, 50 – 60 Hz
Total Power Consumption 24v, 5A DC, 120w
500 Series Slot Current 250mA per rail
Total Available 500 Series Slot Current 2A
Operating Temperature +1 to 30 degrees Celsius
Storage Conditions -20 to 50 degrees Celsius
Width 481mm(19"), Rackmount
Height 185mm(7"), 4u
Depth 219m(8.6")
Unit Weight 7kg
Shipping Carton
Width 550mm(21.7")
Height 280mm(11")
Depth 335m(13.2")
Weight 7.5kg

Expand your studio. Expand your sound.

500ADAT is home to 8 of your favourite 500 series modules. It's also an 8in/8out ADAT expander, analogue summing mixer, and artist mixer. It expands the I/O of any ADAT-equipped audio interface.

ADAT Simplicity

Connect 500ADAT to any ADAT Equipped audio interface and expand your available inputs and outputs by 8. Get more out of your current audio interface by using tried, tested, and reliable ADAT.
500 Series Possibilities
500ADAT combines a high-current 8-slot 500 series chassis with digital conversion and ADAT - a powerful and accessible way to get your favourite 500 series modules into your tracking and mixing digital workflow.

Unlock Your Audio Interface's Untapped Potential With 500ADAT.

Your audio interface could have 8 extra recording and playback channels waiting to be used! It's called ADAT and it's the perfect way to expand your current audio interface.

Audio interfaces from major manufactures such as Universal Audio®, Focusrite®and Audient® feature ADAT/Optical connectivity on their rear panel connections.

Simply connect 500ADAT to those unused ADAT ports and unlock the full potential of your audio interface.

Read More

Universal Audio Apollo X4 and 500ADAT


Audient ID44 and 500ADAT


Focusrite Clarett 4 pe and 500ADAT



“In short, in the 500ADAT Cranborne have again delivered remarkable quality at a truly competitive price, while also plugging a long-standing gap in the market.”

“Cons: None

“To get close to a comparable system, you'd need to budget for a decent stand-alone bidirectional converter… an eight-slot rack and a summing mixer... You still wouldn't have all the features of the 500ADAT, and it would cost much more..."

- Matt Houghton, SOS Nov 2019


Read More

Universal Audio Apollo and 500ADAT

ADAT And Beyond

500ADAT features analogue essentials that unite digital and analogue production workflows such as an 8-into-2 analogue summing mixer, Zero-latency artist mixer with 2 reference-quality headphone outputs, and true ADAT & SMUXII/IV transmission to enable operation at sample rates up to 192kHz


Transform your ADAT-equipped audio interface into an analogue powerhouse by adding  8 channels of expansion at up to 96kHz or 4 channels of expansion at 192kHz.

Zero-Latency Artist Mixer

Get your hands back onto the mix by using 500ADAT's two aux busses to create pristine-sounding analogue artist mixes that can be blended with DAW playback, and sent to your musicians with zero-latency.

Seriously High-Powered Headphone Amps

Drive your headphones with 500ADAT's reference-quality headphone amplifier with enough power to drive low-impedance headphones with plenty of headroom and a linear frequency response to below 1Hz.   

Discrete Summing Mixer

Give your mix the final bit of analogue character and send instrument groups and stems back-through your 500 series modules and into the discrete analogue summing mixer to be sent back into your DAW.

500ADAT rear panel

World-Class Conversion & Clocking

To make your 500 series modules shine on your digital recordings, our conversion had to be best-in-class. We squeezed every possible .1dB of performance out of 500ADAT's converters to ensure that the only thing colouring your recordings are your mic placements, mixing decisions, and choice of 500 series modules.

Dynamic Range:
121dB A-weighted, AES17 method, 20Hz - 20kHz

Frequency Response:
-1dB, 2.2Hz to >80kHz

<0.00032% (-110dB) @ -4dBFS, 20Hz - 40kHz, 1kHz, A-weighted

Clock Jitter:
<0.5 Picoseconds

500ADAT front

Deep 500 Series Integration

Configurable Front End
Mix and match your 500 series modules to find the best combinations during recording, and mixing to help create your own signature, analogue sound.

Source Select
Re-patch your 500ADAT at a flick of a switch. Dedicated source select switches for each 500 series slot adjusts the signal routing to send Analogue, C.A.S.T. or USB sources through each your modules.

Enough I/O For Any Hardware
500ADAT to integrates with all of your analogue/digital hardware. Patch in 500ADAT with your own converter or integrate your 19" rack gear with dedicated TRS insert jacks per slot.

No Modules? No Problem
Bypass unused 500 series slots using 500ADAT's dedicated slot-bypass switch and you can use all of the available analogue paths for recording whilst you continue to build your 500 series collection.

500R8 and 500ADAT

Ready For More?

When you want more 500 series connectivity, you can use up to two 500ADATs with some interfaces or pair 500ADAT with our 500R8. Connect 500R8 and 500ADAT together via ADAT and now you have 16 channels of 500 series modules to work with. during recording and mixing. Whilst 500ADAT offers the same performance as 500R8, any 3rd party ADAT expander is also compatible.

More Recording Channels
Record up to 16 channels directly through independent 500 series modules and directly into your DAW for processing. 

More Summing Channels
Play back instrument groups/stems into all 16 available 500 series slots for summing using our C.A.S.T. link connector.

CAST connectors

C.A.S.T. Away

Fitted with our C.A.S.T. system, 500ADAT casts-away excess cabling spaghetti and offers a cost-effective, low-maintenance, plug-and-play solution by transporting 4 channels of balanced, analogue audio over shielded cat 5 cable directly to the location where it is needed in your studio.

Receive Audio From C.A.S.T.
Connect 500ADAT to our N22/N22H breakout boxes using shielded cat 5 cable and now you can send mic/line sources through 100m of Cat 5 cable and directly into 500ADAT's module inputs.



Transmit Audio To C.A.S.T.
Through that same cat 5 connection, you can transport 500ADAT's monitor mix (with Talkback included) through C.A.S.T. and directly to the musician at the other end zero-latency analogue monitoring.



Home Grown Designed, Engineered, and Manufactured In The UK

Housed in a 4U, 19" rack mountable steel frame, 500ADAT lends it self perfectly to mobile recording setups. We tried to think of everything, even the rack ears support three unique mounting methods. You can recess 500R8 into the rack to protect the front panel controls during travel; you can also take those same rack ears and re-orientate them to become a carry handle.

Home Grown
500ADAT is designed, engineered and manufactured in the UK. Every unit that leaves our UK factory is thoroughly tested to provide years of trouble-free and dependable service.

Built And Designed With Passion
We don’t take shortcuts. We don’t compromise. We don’t accept “good enough.” We’re just like you. We’re musicians. We’re audio engineers. 500ADAT is a product we're very proud of, and we hope you will be too.

The Cranborne Audio Family

“…It's a beautiful piece of kit and my seven year wish of having an ADAT I/O enabled 500-module rack has finally come true."

"I mainly intend to use the 500ADAT as an outboard effects loop for my DAWs. 500ADAT is being used (via its ADAT I/O) to route a master drum track out to a pair of DIYRE Colour modules and then through a stereo pair of Radial EXTC's to add some dub-style echos via a Strymon Volante pedal."

"It sounds excellent and is exactly the type of workflow I've been wanting to use with my growing collection of pedals and outboard. Best of all it makes everything very hands-on and tactile which lends itself to mixing with my ears rather than with my eyes. Great stuff for getting out-of-the-box!"

"Thanks again for seeing this journey through to completion and for filling a much needed niche with the 500ADAT. It's going to get a ton of use here in my home studio!..."


W Todd Reynolds