Audix IB01 Mic Line EQ Custom Lunch Box by Raw State Superb British EQ Think Neve Cadac Marinair

Custom built Raw State ‘Lunch Box’ /

Audix IB01 Vers 1 type Mic – Line –EQ Modules. 

Raw State is new to reverb.com but has been trading for many years on another well know web site. Check out the feedback. 

The Audix IBO1 is an unusual and rare item of British Recording / Studio history. The modules are very unusual in featuring an EQ circuit based on ‘Gyrator’ technology. The Gyrator is an active circuit used to emulate the way an ‘old fashioned’ inductor works. The Gyrator EQ design is most famous for being used by Cadac, another brilliant British recording desk manufacturer. The Audix modules are fascinating as the EQ is very similar to, or perhaps based on the Cadac technology.

The input and output transformers are by Marinair, most famous for being also used by Neve.

These modules sound very good indeed, with the EQ having a very different ‘flavour’ to that of Neve, Calrec, and Trident etc.

Modules have been fully refurbished for both reliability and to provide ‘as new’ performance.

 

Work included:

Ultrasonic bath of switches.

Replacement of all electrolytic caps. BC / Vishay types used

Replacement of all transistors.

Fitting sub card / PCB with the Audix Output Transformer drive circuit. This card was originally fitted to the separate Group / Aux module.

Replacement of the HF Gyrator ‘module’ with later Chip version, see pictures. This small PCB was provided by Mr Dave Way of Funky Junk UK. 

Custom made Raw State Lunch Box

Built all in aluminium and finished in Semi Metallic Bronze powder coating.

The lunch box is fully modular with the two modules sliding in on rail / guides and plugging into the back plane connectors.

The lunch box houses the output transformers and the two ‘Raw Funk’ power supply’s.

All audio connections are balanced XLR. 

EQ Section: All EQ bands are Bell / Peaking type EQ 

EQ In / Out switch

Low EQ: 60 – 80 –110 – 160 – 240 Hz  

Mid EQ: 0.7 – 1.0 – 1.4 – 2.0 – 2.8 KHz

High EQ: 3 – 4 – 6 – 8 – 12 KHz          

High Pass Filter: 40 – 70 – 120 – 210 Hz:

Separate from main EQ, so can be used with Mic Pre as low freq roll off.

Specs:

Mic gain:   28 to 80 dB    Switched in 11 steps

Phase Switch on Mic input.

Individual Phantom Power switching.

Line Gain: +10 to –15 dB Switched in 6 steps

All Marinair Transformer ( TX ) Balanced.

Mic TX: Marinair T 1447

Line TX: Marinair T 1448

Output TX: Marinair T 1501

Power Supply: 240 or 120 Volts mains

External mains transformers in separate power supply case.

‘Raw Funk’ power supply boards used with +24 Volt for Audio and +48 Volt for Phantom.

 

For sale at:

£1,500 ex VAT. VAT invoice will be provided.

Note: Audix, Cadac, Calrec, Neve, Trident, Marinair are all registered trademarks