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Purple Audio Action 500-series FET Compressor  From Purple

500 Series Fet Compressor based loosely off the MC77 (UA 1176)

Purple Audio

$775.00

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Manufacturer's Description from Purple

The Action is a FET compressor reminiscent of the MC77. Designed to work in standard “500″ racks.

The Action features a constant impedance 600 ohm input attenuator feeding the input transformer, just like our MC77 units. This makes the input more resistant to overload by hot signals. After the input transformer, the signal is attenuated by the same gain reduction FET as in the MC77. The attenuated signal is buffered by our class A KDJ3 opamp, which feeds the output fader. Lastly, our class AB KDJ4 output opamp drives our custom hexafilar nickel and steel output transformer. The total gain (with no attenuation) is 45dB, just like the MC77.

Attack and release times cover a broader range than the MC77, which can cause distortion… which may or may not be what you are looking for. Use at extremes with caution. The ratios are the same as the MC77, and the threshhold moves up as the ratio goes up, just like the MC77.

Stereo linking is accomplished by cross connecting pins 3 & 6 on the edge connector. On the Purple Sweet Ten, there is a second output XLR that can be used to link two Actions. The link is accomplished using a XLR-F to XLR-F cable with pin 2 on one XLR-F connecting to pin 3 on the other XLR-F and vice versa. Plug in the cable, flip the front panel switch and you are linked. Non-Purple racks do not have an easy way to connect pins 3 and 6, and will need modification to link two Action units.

Features:

• Input attenuator feeding input transformer

• Output level control

• Input and output tricolor LED metering

• Eight LED GR metering

• Five ratios including “All buttons in” mode

• Attack and Release controls

• True Relay Bypass

• Stereo Linking

• Compression on/off switch

• Discrete signal path

• Over Current Resettable Fused

(prevents any module problem from affecting your rack)

• ROHS – Lead Free

 

Action Pinout:

  • Pin 1: Chassis Ground
  • Pin 2: Output A +
  • Pin 3: Link In – (Purple Audio Rack Only – XLR OUT 2)
  • Pin 4: Output A -
  • Pin 5: Audio Ground
  • Pin 6: Link Out – (Purple Audio Rack Only – XLR OUT 2)
  • Pin 7: Input -
  • Pin 8: Input -
  • Pin 9: Input +
  • Pin 10: Input +
  • Pin 11: NC
  • Pin 12: +15 or 16VDC 90ma
  • Pin 13: Audio Ground
  • Pin 14: -15 or 16VDC 90ma
  • Pin 15: NC (+48VDC)
Purple Audio

About Manufacturer

Purple Audio was founded by Andrew Roberts in 1997.

While attending NYU’s music technology program in 1994 Andrew bought, sold and repaired recording equipment from a dorm room on the college campus.

In the fall of 1996, Andrew was introduced to John Klett who invited him to join a new repair shop in midtown Manhattan. This shop, dubbed Tech Mecca, was the new location for Manhattan Audio, a large repair facility and wiring company and Klett’s new midtown home.  Andrew apprenticed under Klett and began repair on high-end audio gear.

By the fall of 1997 Purple had introduced the MC76. Soon after Purple Audio’s inaugural AES show Purple needed more space, the operation was moved to a loft in Long Island City, Queens. This large space provided overflow space for Tech Mecca’s large projects.

Purple Audio spent the late 90s and early 00s shipping the MC76 and getting involved in console and tape machine rebuild projects. Andrew studied analog circuit and logic design, seeing it in practice during field service calls to major studios in the area.  While sales of the MC76 started to drop off as a result of a new competitor’s ad campaign, which in turn brought increased awareness of the MC76 product and user comments proved that the Purple Audio product was clearly superior.  Distribution was finally achieved and Purple Audio began selling direct and through select dealers.

Then began a long process in console design. Andrew designed a couple of large master sections, which were retrofitted into existing consoles. The master sections went through several design revisions before the Super 8 modules were designed. The process resulted in op amps and a mic preamp design that later became the Biz. Eventually Purple delivered 16 channel portable rigs and a 32 channel full-blown console.

In 2006 the bold move was made.  Purple Audio uprooted its operations in New York and shifted focus to a new location in Pennsylvania.   Andrew settled in the quaint little river town of Jim Thorpe Pennsylvania, where he began restoration of a 1850’s Victorian home.  Just a short drive from his new residence Purple’s new location was up and running in a 1000 sq ft. industrial complex in Weissport PA. The shop in New York still exists and is the home of Coral Sound, Exile Studios, Technical Audio, & Eisen Audio.

Upon his move to Weissport, PA in 2006 Andrew was now freed from the distractions of New York, Exile, and repair work. This allowed him to focus on the design work he had anxiously been working toward for years.  With that came the completion of the new Purple Audio products in 2007 : the Action, Cans, Pants, Sweet Ten ready for the AES show with actual production the first few months of 2008.

In 2011 Purple Audio once again upgraded its facilities and purchased a historic fire company in Jim Thorpe PA, called the “Marion Hose”.

Located just blocks away from Andrews residence in Historic Jim Thorpe PA.  The Building was sold to Purple Audio by the Mauch Chunk Historical Society.  An entire year was devoted to the gutting and refitting of the new Purple manufacturing facility.  While respecting the original historic architeture the exterior remains intact and historically correct while the interior reflects a NYC style loft with a hi-tech organic flare.   The second floor is primarily for design and manufacture, and an area designated for an artist lounge, kitchen, bath and views.  More to come on that.

Specifications

• Total Gain: 45dBu

• Ratios: 4:1, 8:1, 12:1, 20:1, ∞:1 (All buttons in)

• Attack time: Variable from 800 to 20 microseconds

• Release time: Variable from 1.1 seconds to 50 mls

• Input impedance: 600 ohms

• Output impedance: 600 ohms

• Current consumption: 90ma