| Content | The Warm Audio BUS-COMP is an all-analog, 2 channel, stereo VCA bus compressor based on classic circuitry that has provided silky smooth tone for decades. Stereo VCA bus compressors are masterful at controlling dynamics on many sources, but they have become widely known for their magic touch on stereo mixes.
The BUS-COMP will perform well on stereo mixes, drum mixes, drum overheads, acoustic guitars, keyboards, piano, orchestral instruments, voice-overs and an array of other sources. The BUS-COMP is primarily designed for stereo use, but it can be used just as successfully on individual mono sources. VCA bus compressors of this type have become widely loved for their ability to control dynamics effortlessly but also for the added tone and depth they provide to the audio signal that passes through them, even when no compression is applied.
Re-creating legendary VCA bus compressor technology was the focus of the BUS-COMP’s design, however, adding options and improvements was just as important to us during its development. One feature we are proud to boast is the BUS-COMP’s ability to have USA made CineMag transformers inserted into the signal path driven by fully discrete operational amplifiers. With a single push of a front panel switch, these custom USA made transformers are inserted into the audio’s path providing increased depth, tone and vibe!
As with all of the products we develop here at Warm Audio, the BUS-COMP was designed with a price point in mind. With efficient, modern manufacturing techniques we are proud to bring this boutique quality, classic VCA bus compressor to the market at a quality-to-price ratio previously unseen. More studios than ever before will now have access to analog quality VCA bus compression. Our desire is for all musicians to be heard the way they want to be heard and we feel the BUS-COMP is the perfect tool to perfect any mix!
- ALL ANALOG, 2 CHANNEL, STEREO VCA BUS COMPRESSOR
- BASED ON LEGENDARY VCA BUS COMPRESSOR TECHNOLOGY
- SELECTABLE DISCRETE OPAMP STAGE WITH CINEMAG USA TRANSFORMERS
- EXTERNAL SIDE CHAIN SOURCE SELECT
- SELECTABLE HI-PASS FILTER: 30, 60, 105, 125, 185 HZ
- COMPRESSOR ENGAGE SWITCH FOR EASY A/B COMPRESS VS. NO-COMPRESS COMPARISON
- PERFORMS WELL ON STEREO MIXES, DRUM MIXES, DRUM OVERHEADS, ACOUSTIC GUITARS, KEYBOARDS, PIANO, ORCHESTRAL INSTRUMENTS, VOICE-OVERS AND ENDLESS OTHER SOURCES
- CAN BE USED ON STEREO AS WELL AS INDIVIDUAL MONO SOURCES
- THAT 2180 VCAS
- OPTIMALLY PROVIDES BOTH XLR AND TRS CONNECTIVITY
- NOISE: < -90DBU
- DYNAMIC RANGE: > 120DB
- FREQUENCY RESPONSE: 18HZ – 22KHZ
- THD + NOISE, 20HZ – 20KHZ, +20DBU INPUT: < .05%
- INPUT IMPEDANCE: 10K OHMS
- OUTPUT IMPEDANCE: 50 OHMS
| FEATURES
- The industry-standard tabletop looper, updated and enhanced
- Class-leading sound quality with 32-bit AD/DA and 32-bit floating-point processing
- Five simultaneous stereo phrase tracks with dedicated controls and independent volume faders
- Input FX and Track FX sections, each with four simultaneous effects and four quick-access banks
- Customizable FX and Track buttons for each phrase track
- Massive onboard effects selection with 49 Input FX types and 53 Track FX types, including new Harmony, Electric FX and many others
- Ultra-durable faders with longer throw for more precise adjustment
- Mark Back function provides enhanced undo/redo flexibility while performing
- Two XLR mic inputs with phantom power, two stereo line input pairs, and three stereo line output pairs
- 99 memories, each containing five phrase tracks, custom effects and playback settings, control assignments and more
- Synchronize your loops with over 200 onboard rhythm patterns and 16 drum kits
- Deep MIDI control support
- Two external control jacks, each with support for up to two footswitches or an expression pedal
- USB for data backup, phrase import/export with BOSS Tone Studio and pattern import with the RC Rhythm Converter
TECHNICAL SPECIFICATION
Boss RC-505MK2 Tabletop Loop Station
- Sampling Frequency: 44.1 kHz
- AD/DA Conversion: 32 bits
- Processing: 32-bit floating point
RECORDING/PLAYBACK
- Number of Tracks: 5
- Data Format: WAV (44.1 kHz, 32-bit float, stereo)
- Maximum Recording Time: Approx. 1.5 hours (1 track), Approx.13 hours (total of All memories)
- Rhythm Type: 200 types or greater
- Rhythm Kit: 16 types
EFFECTS
- INPUT FX: 49 types
- TRACK FX: 53 types
- MASTER FX: 2 types
- Memory: 99
- Display: Graphic LCD (128 x 64 dots, backlit LCD)
CONNECTORS
- MIC IN 1, 2 jack: XLR type (balanced, phantom power: DC 48 V, 10 mA Max
- INST IN 1, 2 jacks, MAIN OUT jacks, SUB OUT 1, 2 jacks: 1/4-inch phone type
- PHONES jack: Stereo 1/4-inch phone type
- CTL1,2/EXP1 jack, CTL3,4/EXP2 jack: 1/4-inch TRS phone type
- USB port: USB B type
- MIDI (IN, OUT) connectors
- DC IN jack
- Power Supply: AC adaptor
CURRENT DRAW
- 1.0 A (with phantom power)
- 0.9 A (without phantom power)
- Dimensions: 16-9/16" W x 9-1/4" D x 2-11/16" H
- Weight: 4 lb.
| The product that started it all for Empirical Labs. Born of founder Dave Derr’s love of classic compressors like the 1176, LA-2A and Gain Brain (among others), the Distressor incorporates his favorite sonic characteristics of these, along with other unique and interesting features that have made it a staple for audio engineers all over the world. With over 28,000 units in the field, it’s safe to say that the Distressor is one of the best selling high end compressors of all time… if not THE best selling. A prominent recording engineer recently wagered that there probably was not a top 40 record made in the last five years that didn’t have at least one Distressor on it.
Besides providing a wide range of control and a unique feature set, the Distressor offers a warm, vintage sound by using a custom designed gain control circuit. This “warmth” or “vintage sound” has become a major issue in the last few decades, as the super clear and linear digital technology does next to nothing to soften “harsh” sounds, nor emphasize the bass frequencies in music sources. Conversely, older analog tape, vinyl records and tube equipment could not be prevented from coloring the sound, often to the frustration of recording engineers. However, many people now realize that this coloring can be extremely pleasant and musical. Digital technology is often referred to as “cold” and “brittle” among other terms (although we prefer “unforgiving”).
Unique Compression Curves
All eight of the Distressor’s curves are unique and distinctive, from the 1:1 mode that simply warms up signal with low order harmonics without intentional compression, to the “Nuke” setting – a brick wall limiting curve that shines on live drum room mics. Each curve has its own personality and several actually use different circuitry, and are effectively different compressors. Most exceptional is the 10:1 “Opto” ratio which uses separate detector circuitry to emulate the oldest (and valued) “light controlled” devices, such as the LA-2A.
Distortion (Color) Modes
Another large part of the Distressor’s personality and power derive from three modes that color the signal, even without compression. These extended audio modes were designed to allow emulation of some very old and expensive vintage compressors & limiters, and let the Distressor deliver a classic “knee” sound all its own by providing user programmable, warm harmonic distortion. In addition to the basic distortion mode, Distort 2 emphasizes tube-like 2nd order harmonics, while in Distort 3 setting the distortion becomes dominated by 3rd harmonics more closely resembling tape. Two HP filters – one in the audio path, one in the detector path – are also available to help with low frequencies that can cause pumping and breathing.
British Mode
The concept of British Mode came from an unusual setting on the classic UREI LN1176 limiter. The unit was designed to have only four ratios, each ratio being engaged by selecting one of four buttons. However, as early as 1980 (or before), renegade recording engineers, always on the lookout for something a little more “over-the-top”, found that you could make all four buttons stay in if you pressed them just right. What resulted was a very aggressive sound that had some elements of the unit’s 20:1 ratio, but with an unusual knee and new envelope shape. Somewhere along the line, someone called it “British Mode”, and the name stuck.
The EL8-X has the advantage of being able to selectively apply this aggressive characteristic – not just to the new “British” ratio (1:1) – to any of the ratios, simply by engaging the dedicated “British Mode” switch.
The British Mode and Image Link options are only available on the EL8-X.
Image Link
The original Distressor stereo link function used a summing and phase detection method, which allowed slight stereo image shifting. Although frequently desirable for its phase correction, and its “thickening” on open room mics and other stereo sources, this approach can sometimes be a problem on stereo program material where the producer/engineers want to maintain absolute left/right balance at all times. With the new “Stereo Image Link” option, the EL8-X now has three link options – the original “phase” link, the new Image Link and the combination of the two, phase and image linking – something never before offered on any compressors or limiters.
- Frequency Response – 2 Hz to 160 kHz in clean audio mode (+0, -3 dB). Response is shaped in distortion modes (Dist 2, Dist 3).
- Dynamic Range – 110 dB from max. output to min. output in 1:1 mode. Greater than 100 dB signal to noise in distort 3 mode.
- Distortion – ranges between .02% and 20% depending on distortion mode and release times set on front panel.
- I/O – DC Coupled input and outputs.
- Time Constants – Attack range 50uS – 50mS. Release range .05 sec to 3.5 seconds, normal modes and up to 20 seconds in 10:1 opto mode. Time constants are dependent on ratio.
- Power Consumption – 15 Watts Max.
- Metal Chassis – single height 1.75″ high, 10″ deep, 19″ wide.
- Shipping info – 12.1 lbs mono. Mono box dimensions 22.5″ x 18.5″ x 3 1/4″.
| Originally developed for the dynamics circuit of the acclaimed Shelford Channel, the 535 Diode Bridge Compressor captures the soul of Rupert Neve’s original 2254 compressor while providing modern updates including advanced timing control, significantly lower noise, fully stepped controls throughout, and internal parallel processing capabilities.
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 535 Diode Bridge Compressor is a dynamic tool equipped to make a bold statement on virtually any mix or track.
LINE INPUT TO LINE OUTPUT
- Compressor Bypassed.
- Z source = 40 Ohm Balanced
INPUT IMPEDANCE
10K Ohm
OUTPUT IMPEDANCE
40 Ohm
MAXIMUM INPUT LEVEL
+23.5 dBu
MAXIMUM OUTPUT LEVEL
+23.5 dBu
NOISE
- 22 Hz - 22 kHz BW.
- -101 dBu
FREQUENCY RESPONSE
- 10 Hz - 120 kHz, 30ft Output XLR Cable.
- +/- 0.25 dB
THD+N
- @ 1 kHz @ Maximum Output Level, 22 Hz - 22 kHz BW.
- 0.001%
| 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. |
- FAST – Fast Attack (750us), Fast Release (130ms)
- MF – Medium Attack (2.25ms), Fast Release (130ms)
- MED – Medium Attack (2.25ms), Medium Release (400ms)
- MS – Medium Attack (4ms), Slow Release (725ms)
- SLOW – Slow Attack (10ms), Slow Release (1S)
- AUTO – Medium Attack (5ms), Dual Decay Release (T1 500ms, T2 1s)The LINK switch allows the compressor to be linked to another 535 compressor module via a sidechain control voltage. In link mode, the compressor generating the greater sidechain voltage (resulting in higher amounts of compression) will control the compression of both audio signal paths to maintain proper stereo center image while compressing. Note: it is advisable to always audition the unlinked sound as well, to decide if the benefit of a constant stereo center image is worth the potential trade-off of reduced left / right independence in the stereo field.
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SIDECHAIN HPF
- The S/C HPF switch allows the user to insert a 12dB/octave 150Hz high-pass filter in the compressor sidechain. When this filter is engaged, the compressor will be considerably less responsive to information below 150Hz. For example: if used on a drum kit, the low end of the kick drum would have less proportional effect on the compression than a snare drum or cymbals, since a significant portion of the kick drum’s dynamic energy is focused below 150Hz.
LEVEL AND GAIN REDUCTION METERING
- These two LED meters provide accurate representations of both the output level of the compressor and the amount of gain reduction being applied to the input signal.
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