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CP5176 FET compressor for the '500' Lunchbox - Kit

CP5176 FET compressor for the '500' Lunchbox - Kit

Price: 329,00€ (394,80€ VAT inc.)
352,02 USD 293,90 GBP

The CP5176 is a FET compressor based on the design that was originally used in the 1176 compressor, which has been adapted to the '500' format of API*.

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  Product ID CP5176
  •   Description
  •   Specs
  •   Docs
  •   Reviews

CP5176 FET Compressor


The CP5176 is a FET compressor based on the design that was originally used in the 1176 compressor, which has been adapted to the '500' format of API*.

This compressor became extremely popular because of some specific characteristics such as its ultra-fast attack time, as well as its unique sound, due to the FET transistor, the class A and the transformers.

It is typically used for compressing snare, vocals, guitars or drum bus in stereo.

The CP5176 adds a few features to the original 1176 such as a new ratio of 2, a high-pass filter in the side chain and a variation in the FET gain reduction circuit that produces more distortion.

Highlights

  • Original Cinemag (Reichenbach) transformers on input and output,
  • 5 ratios + SLAM mode (all buttons mode),
  • All discrete class A audio path,
  • DOA based, API* 2520 compatible, output stage (discrete Op-Amp),
  • High pass filter in the sidechain,
  • Distortion mode adds 3% of second harmonic, close to Rev A,
  • High resolution gain reduction meter,
  • Available assembled or as a full kit (everything included
  • Golden contacts on relays and switches
  • High precision aluminium knobs
  • High grade double sided PCB with plated holes

Controls

1 InputPotentiometer that sets the signal level before compression. It defines the compression threshold.

2 Out Potentiometer that set the signal level after compression (make up gain).

3 Ratio Rotary switch that sets the compression ratio from 2 to 20. Ratio 2, allowing more subtle compressions, has been added to the original circuit. The SLAM mode is the "all buttons pressed" on the 1176.

4 Attck Potentiometer that sets the attack time: The delay before the compressor starts reducing gain.

5 Rel Potentiometer that sets the release time: Time that the compressor takes before returning to the "no gain reduction" state.

6 Gr High resolution gain reduction display: 16 LED's from -1dB to -22dB.

7 HPF Inserts a 80 Hz high-pass filter in the sidechain. Produces a Fat sound and eliminates bass driven pumping.

8 Dist Modifies the signal balance on the FET, adding second harmonic distortion. Close to the Rev A version of 1176.

9 Link Connects two compressors in stereo mode.

10 LED that shows the bypass status.

11 Off Compressor bypass button (hardware by relay).

Circuit

1 Original Cinemag input transformer.

2 All discrete audio path with high grade components.

3 Discrete Op-Amp output circuit, pin compatible with API* 2520.

4 Original Cinemag output transformer.

5 Easy setup of 3 trimmers with a voltmeter, without iteration.

6 16 LED's gain reduction meter.

What's in the kit?

Absolutely everything!

  • Passive components (resistors, capacitors, inductors),
  • 2 Cinemag transformers
  • Active components (diodes, transistors, LED's, IC's),
  • Discrete Op-Amp kit,
  • Front panel elements (switches, potentiometers, knobs),
  • Connectors, relay,
  • PCB's,
  • Front panel and side panel,
  • All hardware.

You bring the solder (use good quality solder, 1mm diameter max) and the Lunchbox.

Difficulty level

The CP5176 kit has an medium difficulty level. Nothing very difficult but a rather large number of components and a good density.

The setup is simple but requires using a good quality AC voltmeter.

Product Options

XT500 Extender: The XT500 option is a cable extension that allows you to test and setup the module outside the lunchbox while connected.

501 Case: The 501 case option is a standalone, single slot lunchbox with PSU.
The XT500 Extender is not needed with the 501.

Assembled Product: If you prefer not to DIY, choose an Assembled product. It comes fully assembled, ready to use.


lunchbox

Technical specifications

Measure Conditions Value
Idle supply current No input signal V+ : +70mA
V- : -65 mA
Input impedance f=1kHz 13 kΩ
Maximum input level defined by input transformer +20 dBu
Maximum output level before clip f=1kHz +27 dBu
Minimum gain - ∞
Maximum gain +42 dB
Frequency response Deviation=+/-1dB 6 Hz - 27 kHz
Total harmonic distortion (THD) f=1kHz without gain reduction < 0.05%
with gain reduction < 0.1%
DIST Button ON 3%
Attack time from 20 us to 20 ms
Release time from 50 ms to 1.5 s

 

lunchbox

Documents


  Go to Products technical documentation

  User manual
 
5 Product Reviews - Average rating 5 / 5    Show All

Click to review this product

Very musical compressor!

TP - 10/05/2022

Just finished assembling. Very fun and easy to build. Very musical compressor, can easily go 10+ GR without pumping. Unless the most software emulations of the 1176's on the market, with added highs when compressing, this compressor actually smooth out the highs a bit, which I really love in this digital era.

I love this thing

Kyle - 11/02/2022

I was really struggling to get transparent level control of my vocal recordings. My La2a clone was just pumping too much and it sounded unnatural. This thing completely solved the problem. This compressor is awesome.

Super son à un prix imbattable.

Dr Dubwiser - 10/12/2021

J'ai deux 5176, deux hairball 1176 et un kt-76. Le kt-76 n'est pas mal, les hairball sont vraiment top mais ils coûtent plus du double. En gros, je n'ai rien trouvé de mieux qualité/prix. Sans hésiter, si j'avais besoin d'un autre 1176 je reprendrais un 5176 (c'est pour ça que j'ai deux unitées, en "fet" ;P)

Great kit!

DTP - 24/10/2019

Great layout, great documentation, great price and of course the most important thing: GREAT sound!

Next up is an LA502, a pair of EQP501's and a CP4500. Based on this kit, I'm pretty confident those won't disappoint me at all.


Bread and Butter!

ZMFG - 01/08/2018

For the record, I had never soldered before I bought my first Sound Skulptor kit (CP5176). My CP5176 is about 2 years old now, and still running strong. I use this on literally everything I record. I am not professionally trained in the recording arts, but to my ear, this compressor is awesome. I am currently running it in series with the LA502 before it, and it makes for some really sexy Vox and Bass.

Click to review this product

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