| Content | The Shelford Channel is built around Rupert Neve’s first new transformer-gain, class-A microphone preamplifier in over 40 years, a “best-of-the-classics” inductor EQ section, a tone-packed diode bridge compressor, the power of variable Silk saturation, a new dual-tap transformer output stage, and twice the operating voltage of vintage designs.
The Input Stage and Transformer Gain Mic Pre
Like Rupert’s designs from his time in Little Shelford , the Shelford Channel’s preamplifier uses a directly-coupled transformer input with gain provided by the custom transformer itself – a first in over 40 years for Rupert Neve. This new custom-designed input transformer, along with its careful integration with the surrounding class-A circuitry, is critical to the Channel’s bold and instantly recognizable character.
Conveniently, the Direct Input uses the same topology as the best-selling RNDI Active Transformer Direct Interface, providing astonishing clarity for high-Z instrument signals, with unparalleled low-frequency response and an incredibly smooth high end.
What is Silk?
The Silk & Texture circuit on the Shelford Channel allows you to fine-tune the amount (and type) of harmonic content in the output stage. This means your signal can be adjusted from quite transparent to settings that produce nearly 10x the amount of sonic color as Rupert’s vintage modules – and in two very unique modes. No matter what sound you’re looking for, Silk can help get you there.
The Dual Tap Transformer Output
Complementing the Silk circuit is the custom-designed output transformer, which uses Rupert Neve Designs’ unique dual-tap output topology. This offers both full-headroom (+26dBu) and -6dB outputs, allowing the engineer to drive the unit fully into classic transformer saturation without clipping converters and other devices later in the chain.
The “Best-Of” EQ
The Shelford Channel’s 3-band, custom-tapped inductor EQ was inspired by our favorite elements of Rupert’s vintage EQ designs. The low frequency band is designed to produce a creamy, resonant bass response similar to a vintage 1064 – but unlike the vintage modules, the LF band on the Shelford Channel can be used as either a shelf or a peak filter, adding punch, dimension, and control to your low end.
The midrange band is based on that of the 1073, ideal for sweetening vocals and instruments while bringing them forward in a mix, and its proportional “Q” response makes it well-suited for minimizing problematic frequencies. The high frequency band is a hybrid vintage / modern design, blending inductor circuitry with capacitor-based topologies to achieve vintage tones with enhanced control, with the shelf / peak corner switchable between 8K or 16K.
The Diode Bridge Compressor
Like the Inductor EQ and Transformer Gain microphone preamp, the Diode Bridge Compressor in the Shelford Channel is based on the same topologies found in Rupert’s vintage designs – but refined & adapted for the modern engineer.
What is diode bridge compression? Where the VCA compressor found in the Master Buss Processor provides unmatched clarity, the weighty, harmonically rich tonality of diode bridge compression can be essential in pushing key sources like vocals, electric guitars, bass and drums to the forefront of a mix.
By understanding the limitations of vintage units like the legendary 2254, painstaking effort was taken to reproduce the unique tone of these classics while improving the noise floor & accuracy, expanding inflexible time constants, adding full wave sidechain detection for improved dynamic response, and widening the range of threshold and ratio controls.
Delivering the powerful sound of these iconic designs with enhanced flexibility for the modern age, the Shelford’s diode bridge compressor is a dynamic tool equipped to make a statement on virtually any mix or track.
MIC PREAMP
INPUT IMPEDANCE
2200 Ohm
MAXIMUM INPUT
- +21.5 dBu from 150 Hz to 22 kHz
- +8 dBu 20 Hz to 22 kHz
NOISE
- Un-weighted, 22 Hz-22 kHz, source impedance 150 Ohm balanced.
- Main Out @ unity gain -100.9 dBu
- -6 dB Out @ unity gain -106.6 dBu
- +30 dB gain (Main Out) -91.37 dBu
- +66 dB Gain (Main Out) -64.1 dBu
- Equivalent Input Noise -121.37 dBu
FREQUENCY RESPONSE
+/-0.25 dB from 17 Hz to 45 kHz
DIRECT INPUT
MAXIMUM INPUT
8 dBu @ 20 Hz to 120 kHz
NOISE (MAIN OUTPUT)
-100 dBu (22 Hz to 22 kHz)
LINE INPUT
MAXIMUM INPUT LEVEL
+30.5 dBu 20 Hz to 30 kHz
TOTAL HARMONIC DISTORTION AND NOISE
- @ 1 kHz, +20 dBu output level, no load: Better than 0.002%
- @ 20 Hz, +20 dBu output level, no load: 0.05% Typical (2nd and 3rd harmonic)
NOISE (MAIN OUTPUT)
Un-weighted, 22 Hz - 22 kHz, source impedance 40 Ohm balanced, no load.
-101.1 dBu
FREQUENCY RESPONSE
+/- 0.25 dBu from less than 10 Hz to 110 kHz
-0.32 dB @ 120 kHz
MAXIMUM OUTPUT LEVEL
+26 dBu @ 16 Hz to 20 kHz
TOTAL HARMONIC DISTORTION AND NOISE WITH SILK ENGAGED
RED
- MIN TEXTURE @ 100 Hz, +20 dBu input level, no load: 0.0131%, mostly 3rd harmonic (typical)
- MAX TEXTURE @ 100 Hz, +20 dBu input level, no load: 1.66%, mostly 2rd harmonic (typical)
BLUE
- MIN TEXTURE @ 100Hz, +20 dBu input level, no load: 0.0079%, mostly 3rd harmonic (typical)
- MAX TEXTURE @ 100Hz, +20 dBu input level, no load: 0.941%, mostly 2rd harmonic (typical)
HIGH PASS FILTER
- Continuously variable swept frequency from 20 Hz to 250 Hz.
- Slope: 12 dB/Octave
EQ NOISE
Un-weighted, 22 Hz-22 kHz: -92 dBu
SIGNAL PRESENT
Illuminates GREEN when input stage signal level reaches -20 dBu
OVERLOAD INDICATOR
Illuminates RED when input stage signal level reaches -23 dBu
DIODE BRIDGE COMPRESSOR
- NOISE (BW 22 Hz – 22 kHz)
- 0 dB Makeup Gain: -84.5 dBu
- +20 dB Makeup Gain: -64.2 dBu
TIME CONSTANTS
- Measurements taken represent full range achievable between 1.5:1 Ratio and 8:1 Ratio setting.
- 0 dBu I/P 1kHz Burst Tone used for all recorded measurements.
- Fast (TC1): Attack 180µS — 1.8mS // Release 100mS – 150mS
- MedFast (TC2): Attack 750µS – 5.25mS // Release 160mS – 250mS
- Med (TC3): 2.7mS – 18mS // Release 350mS – 525mS
- MedSlow (TC4): 4.6mS – 38mS // Release 600mS – 1 S
- Slow (TC5): 11mS – 72.5mS // Release 800mS – 1.25 S
- Auto (TC6): 5.75mS – 35.5mS // Release T1 400mS – 850mS, T2 TBD
- “Fast” Mode Multiplier: Modifies aforementioned TC’s by 70% of original value
PRODUCT DIMENSIONS
19” (48.3 cm) x 10.5” (26.7 cm) x 1.75” (4.4 cm) | This item is in excellent working condition and barely used.
The ZHA-4 splits a single stereo headphone output into four separate powered 1/8” headphone jacks, each with their own volume and mute control. Perfect for bands, podcasts, productions, and more.
Two AA batteries provide hours of portable power. For longer sessions, connect the USB-C port to a portable battery or plug directly into the wall.
What’s in the Box?
- ZHA-4 Handy Headphone Amplifier
- AA Batteries (x2)
- Stereo Mini Audio Cable (19” / 50cm)
- Quick Guide
Please Note: The item displayed in the images may not be the actual item you receive. | Arguably the coolest and most unique device in the Empirical Labs arsenal, the FATSO (Full Analog Tape Simulator and Optimizer) is a digitally controlled analog device that gives musicians and engineers easy access to many of the desirable characteristics exhibited by older tube and Class A electronics and magnetic tape mediums. This two channel audio processor musically integrates frequencies and transients, increasing the apparent volume while keeping tight control over peak levels.
With the FATSO, recording studios and audio production facilities can enhance and soften the sound of Hardware Digital Recorders (HDRs) and Digital Audio Workstations (DAWs). Mix engineers will have the option not to have to use bulky, expensive analog tape recorders to get the warmth and sweet high end they’ve come to rely on for so many decades. Owners of DAWs and HDRs can finally put a stop to complaints about the coldness and brittle edge of their mixes and instruments. Even audiophiles can benefit from the FATSO, bringing back the warmth and ambience of LP’s and tapes to their CD players and other digital reproduction mediums.
The FATSO Goes to Eleven
ELEVEN is a new compressor for the FATSO, replacing the old GP Ratio, and emulates the famous UREI 1176LN in 20:1, with the slowest attack, and fastest release. This 1176 setting has been used on countless hit records through the decades. With the slower “1176” attack, the transients keep the dynamics present, while the high ratio, can radically limit the dynamic range of any source, making it present and sitting in a nice little place in your mix. One can slam it, or just touch it with a few dB of compression. You will find it great on Vocals, Bass, acoustic guitars, drum room mikes, pianos etc. Click here to find out how to upgrade your EL7 to an EL7X.
Four Types of Processing
- Harmonic Generation and Soft Clipper (Distortion Generation) – this class A circuit gently rounds the peaks like saturated tubes or tape.
- High Frequency Saturation (Warmth) – a one-of-a-kind dynamic low pass filter which softens high frequencies when they “pile up” on a source.
- Transformer & Tape Head Emulation – a simulation of the effect of input and output transformers of older devices, which adds the low frequency harmonics that characterize them, as well as analog tape..
- Classic Knee Compression – your typical automatic leveling device found on just about every instrument and vocal track as well as on the overall buss, done Empirical Labs compression – smooth and sweet, but in your face!
Universal Audio's FATSO Emulation
Endorsed and scrutinized for accuracy by designer Dave Derr of Empirical Labs, Universal Audio has painstakingly recreated the FATSO Jr. in this highly anticipated UAD Powered Plugin, capturing the sonic nuances of the original hardware. As part of the FATSO Powered Plugin, UA has also worked closely with Dave Derr to model the original concept of the FATSO, the FATSO Sr., with attack, release, and threshold compressor controls, among other features not available elsewhere.
Frequency Response: 2 Hz to 60 kHz in clean audio mode (+0, -3 dB).
Dynamic Range: 110 dB from maximum output (20 %THD soft clipping) to minimum output. Greater than 100 dB signal to noise.
Distortion: Ranges between .06% and 20% depending on mode and settings.
I/O: DC Coupled input and outputs.
Compressor Time Constants: Attack range 1ms – 60ms. Release range .05sec – 3.5 seconds. Attack and Releases are fixed by the compression type selected.
Power Consumption: 15 Watts Max.
Metal Chassis: single height 1.75″ high, 10″ deep, 19″ wide. | Imagine having the power and flexibility of the OP-Z sequencer available to any other music equipment. Now you can, with the new oplab module - the magic link between OP-Z and the rest of the world. The oplab module is the first hardware expansion module for OP-Z. once mounted in the back of your OP-Z, you can use it to connect to any equipment using standard cv and gate, such as the pocket operator modular or any other modular system. It features three cv outs and one gate out, all programmable and playable from OP-Z. have your wall of modules sequenced from the palm of your hands. Use the po sync out to unleash the power of your regular pocket operators and have them play in sync with the rest of your setup. Even connect standard midi devices, using midi over 3.5 mm jack or the included midi over din adapter cable. Oplab features both midi in and out ports as well as trig in and out for other synthesizers and sequencers. | FEATURES
- 12-way precision rotary switch controls gain from 0 to 66 dB in 6 dB steps
- Continuously variable +/-6 dB level control
- Silk circuit, reduces negative feedback, adding harmonic content as needed
- Red Silk accentuates the saturation in the mid and high frequencies
- Same presence and sweetness found in standard Portico Series modules
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Number of Channels |
Single |
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Inputs |
1x XLR, balanced |
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Output |
1x XLR, transformer-balanced |
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Maximum Output Level |
+23dBu |
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Meter |
8 segment LED meter |
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Power Requirements |
Power Requirements @ +/-16VDC 100mA |
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Dimensions |
Not specified by manufacturer |
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Box Dimensions (LxWxH) |
10.2 x 7.8 x 2" |
| As with ELI’s other signal processors, the Lil FrEQ Equalizer takes a somewhat unique approach to its job. Instead of daisy chaining several equalizers and frequency processors, we combined most of the sound sculpting tools an engineer needs into a compact single rack space box, while still offering the highest performance of any design in its class.
Eight Sections of Processing
There are eight sections of processing – what other EQ offers that? Even better – in addition to a master bypass, each of the Lil FrEQ’s sections features its own dedicated bypass switch, letting you instantly A/B the effect of each section as you adjust and fine-tune them.
HIGH PASS – The High Pass section is a really easy to use sharp filter that cuts all content below one of eight preset frequencies from 30-330 Hz. This filter is very steep and has a special shape that prevents frequencies from thinning out just above the cutoff point. The corner frequency is selected using up/down buttons, and indicated by LEDs that glow softly when the section is bypassed, and brightly when the section is engaged.
HIGH & LOW SHELVING – These two knobs function similarly to the familiar “bass and treble” tone controls found on many consumer audio playback systems; however, these are designed to a much higher performance standard, providing exceptionally smooth and musical boost and cut on the high and low frequencies.
PARAMETRIC EQ – The Lil FrEQ has four sections of fully parametric EQ (LF, Lo Mid, Hi Mid and HF), with each section featuring individual gain, bandwidth (Q) and frequency controls. It may be the cleanest parametric EQ section ever produced, operating below .0007% THD (Total Harmonic Distortion) even at extremely high audio levels. Try finding those specs anywhere else!
DS (DYNAMIC EQ) – The DS section provides the highest performance, easiest to use, and possibly most natural sounding “De-esser” ever built. This powerful tool combines tunable filters with a compressor-like circuit that can help contain and control excessive high frequency content such as sibilants or other sharp transients, especially in the absence of other lower frequency content. It can also function as a one of a kind soft knee High Frequency limiter, which is one of the main things responsible for the Lil FrEQ becoming the go-to vocal EQ for engineers everywhere. It has been used on many acclaimed albums and major live performances all over the world, becoming the “go to” EQ for key tracks like lead vocals, snares, and bass. There are now dozens of hit record vocals that were processed thru the Lil FrEQ.
Frequency Response: 5 Hz to 140 kHz on transformerless inputs and outputs. Transformer output 10Hz to 110 kHz.
Dynamic Range: 120 dB from maximum output (.1% clipping) to minimum output. Greater than 110 dB signal to noise.
Distortion: Ranges between .00056% and .005% depending on mode and settings. DS section has THD < .005%.
I/O: DC coupled inputs and outputs and one transformer coupled output.
Dynamic Time Constraints: Attack is approximately .5 ms. Release .04 sec fixed internally.
Power Consumption: 15 Watts Max.
Metal Chassis: single height 1.75″ high, 10″ deep, 19″ wide. |
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