ART PRO VALVE TWO CHANNEL COMPRESSOR/LIMITER with VACTROL

The PRO VLA (Vactrol? based Leveling Amplifier) is a multi-purpose tool for audio engineering and recording.
Enclosed in a 2U(3.5" high) rack-mountable chassis are two independent channels of analog leveling/compression
designed to work seamlessly with any recording, sound-reinforcement, or electronic instrument setup. ART?s
PRO VLA circuitry is a hybrid design utilizing the latest and most advanced analog and tube technology. Using
a transformerless design throughout, the PRO VLA maintains exceptional signal integrity and extremely low
noise. Its VCA-less design utilizes optical electronics (Vactrol) coupled with a 12AX7 vacuum tube gain stage
for superior musical performance.
The PRO VLA is a soft knee leveling amplifier by design. Although it is capable of providing a thoughougly "squashed"
signal, the PRO VLA was designed to excel in areas where transparent, expressively musical dynamics control
is desired. In addition to making signal levels more manageable, it is common practice to apply compression or
limiting to a signal to make it louder or more "in-your-face“. The benefit of using the PRO VLA for these applications
is in its design. By utilizing opto-electronics, the PRO VLA allows you to add more compression without sounding
like you?re squashing the daylights out of the signal. Unlike typical compressors which use VCA?s to control level
detection, the PRO VLA is very musical. The nature of its operation is much like the way your eye adjusts to light.
Just as your eye transparently adjusts to changes in light, the PRO VLA adjusts to changes in signal level.
Developed in partnership with studio and live sound engineers, the PRO VLA possesses a "sound" that is not available
from any other compressor on the market - at any price! The PRO VLA was designed and constructed with the absolute
best components, assuring a lifetime of quiet, reliable performance.

Pro VLA Features:

VCA-less Design Provides Unrivaled Musical Performance
Provides Superior Dynamics Control For Every Compression Application
Variable Threshold, Ratio and Output Controls
Smooth, Silky and Transparent Sound Quality
Variable Input and Output Gain Controls
Professional Backlit VU
Input/Output Level Metering
Ten Segment Gain Reduction LED Array
XLR and 1/4" Inputs and Outputs
Mastering Quality Audio Processing
WINNER - ELECTRONIC MUSICIAN EDITORS CHOICE AWARD
Five Year Warranty

The Avalon VT-737SP features a combination of TUBE preamplifiers,
opto-compressor,sweep equalizer, output level and VU metering in a
2U space.
PREAMPLIFIER
The VT-737SP has three input selections: 1. The VT-737SP features a
higher-performance microphone input transformer with +48v phantom
selection. 2. Instrument DI high source input with jack located on front
panel. 3. Balanced line input, discrete high-level Class A. The Class A
preamplifier utilizes two cascaded, dual vacuum tube triodes configured
with minimum negative feedback. A high gain switch boosts the overall
gain of the preamplifier. The four high quality tubes are configured as
singled ended anode coupled followers. A passive-variable high pass filter
and hard-wire relay bypass completes the input signal conditioning. The
phase reverse relay is available on all three inputs.
OPTO-COMPRESSOR
The opto-compressor features a minimum signal path design with twin Class
A vacuum tube triodes for gain matching. The optical attenuator acts as a
simple passive level controller. Full dynamic control from soft compression to
hard- knee limiting can be achieved with threshold, ratio-compression, attack
and release controls plus gain reduction selection on the large VU meter. Special
spectral control including de-ess is available with the dual sweep mid EQ to side-
chain switch. The EQ section can be flipped pre or post the opto-compressor
via a front panel switch for alternate effects and tone shaping. Two VT-737SPs
can be linked via a rear panel link cable for stereo tracking. The compressor
bypass is a sealed silver relay for the most direct signal path.
SWEEP-EQUALIZER AND OUTPUT LEVEL
The VT-737SP equalizer utilizes 100% discrete, Class A-high-voltage transistors
for optimum sonic performance. The high and low frequency bands provide the
smooth characteristics of an all passive design, while the dual mid bands include
variable frequency and switched Q-width selection. The enhanced range of the mid
bands is extended into the high and low bands by the use of X10 frequency multipliers.
The bypass switch incorporates a sealed silver relay for the most direct signal path.
When the EQ to sidechain is engaged, the high-low EQ remains in the audio path for
"tone enhancement“. The output level control provides a variable control of the overall
signal path. The output amplifier utilizes another dual triode vacuum tube driving a
100% discrete, Class A, high-current, balanced and DC coupled low noise output
amplifier.

AVALON VT-737SP FEATURES
Vacuum tube triode signal path, transformer balanced microphone input, high-voltage
circuits for maximum headroom to +30dB, low noise -92dB, internal discrete power
supply with toroidal transformer, soft-start tube life extender, stereo link for compressors,
all discrete Class A equalizer with musical passive filter design, sealed silver relays for
signal routing, large control knobs with professional conductive plastic potentiometers,
VU meter for output level monitoring and compressor gain reduction.

VT-737SP SPECIFICATIONS
Circuit topology Four dual triode vacuum tubes (Sovtek 6922), high-voltage discrete
Class A
Gain Range Microphone: Transformer balanced 850/2500 ohm, 0dB to +58dB Instrument:
Unbalanced 1 meg ohm, 0dB to+30dB Line: Balanced Class A 20k ohms, -27dB to 28dB
Maximum input level and connector types Microphone26dB@25Hz, +30dB@1kHz balanced
XLR Instrument+30dB unbalanced front panel jack socket
Line +36dB balanced XLR
Maximum output level +30dB balanced 600 ohms, DC coupled, discrete Class A
Output type and gain XLR connector, output trim gain -45dB to20dB
Noise 20kHz unweighted -92dB
Noise microphone EIN -116dB, 22Hz to 22kHz unweighted
Distortion THD, IMD 0.5%
Frequency response -/2.5dB 10Hz to 120kHz input filter included
Frequency response -3dB 1Hz to 200kHz line in-out
VU meter and gain reduction High quality illuminated OVU =+4dB and gain reduction to -20dB
High cut filter Variable 6dB per octave 30Hz to 140Hz
Compressor type Optical passive attenuator incorporating twin vacuum tubes and stereo link
Threshold - Ratio Threshold variable -30dB to +20dB, ratio-compression variable 1:1 to 20:1
Attack - Release Attack variable 2mS to 200mS, release variable 100mS to 5 seconds
Equalizer type Discrete Class A, variable active and switched passive design
Frequency bands (4) Treble - switched 10kHz, 15kHz, 20kHz, 32kHz, +/- 20dB range, shelf
High mid - variable 200Hz to 2k8Hz and 2kHz to 28kHz, +/- 16dB range, hi-lo Q Low mid -
variable 30Hz to 450Hz and 300Hz to 4k5Hz, +/- 16dB range, hi-lo Q Bass - switched 15Hz,
30Hz, 60Hz, 150Hz, +/- 24dB range, shelf
AC power Internal toroidal 100v to 240v, 50-60Hz selectable, 75 watts maximum
Dimensions 19 x 12 x 3.5 in (482 x 305 x 89mm)
Weight 22lbs (10kg)
Dimensions-shipping carton 21 x 18 x 8 in (533 x 457 x 203mm)
Weight-packed 26lbs (11.8kg)

High-Definition 31-Band Stereo Graphic Equalizer with FBQ Feedback Detection System

• Professional 31-band stereo graphic equalizer for live and studio applications
• Revolutionary FBQ Feedback Detection system instantly reveals critical frequencies and can also be used as audio analyzer
• Ultra-low noise 4580 operational amplifiers for highest signal integrity
• Dedicated mono subwoofer output with adjustable crossover frequency
• Additional sweepable high and low-cut filters for each channel remove unwanted frequencies, e.g. floor rumble, hiss etc.
• Highly accurate 12-segment LED input/output metering and input gain controls for easy level setting

• Relay-controlled hard-bypass with an auto-bypass function during power failure (fail-safe relay)
• Servo-balanced inputs and outputs with 1/4" TRS and gold-plated XLR connectors
• “Planet Earth" switching power supply for maximum flexibility (100
  - 240 V~), noise-free audio, superior transient response plus low power consumption for energy saving
• 3-Year Warranty Program*
• Conceived and designed by BEHRINGER Germany

VIRTUALIZER 3D FX2000 - Υψηλής απόδοσης 3D Multi-Engine Επεξεργαστής εφέ.
• 71 breathtaking new algorithms—true RSM (Real Sound Modeling) stereo and 3D effects
• Wave-adaptive virtual Room reverb algorithms for natural reverb and delay
• Awesome modulation, dynamic, psychoacoustic and EQ algorithms
• Authentic amp simulation, distortion and special effects
• 11 effect combinations with selectable serial / parallel configuration
• Up to 7 adjustable parameters plus 2-band EQ per effect
• 24-bit A/D and D/A converters with 64/128-times oversampling
• True stereo processing for realistic channel separation in stereo image
• 100 factory presets plus 100 user memory locations
• Extensive MIDI implementation
• Accurate LED level meters for perfect level setting and optimum performance
• Servo-balanced XLR and ¼'' TRS inputs and outputs
The FX2000 allows you to layer modulation effects like chorus, flanger, pitch or tremolo with your reverb or delay selections.
The FX2000 provides 12 different reverb programs, so you always have the ideal reverb for your live performance or studio needs.
• Reverbs: Cathedral - Gold plate - Small hall - Studio - Concert - Stage - Spring & Reverse Reverb - Ambience and more...
• Delays: Stereo - Tape Echo - Ping Pong and more...
• Modulation and Pitch Shifter FX: Stereo/Vintage/Jet Stream Flanger - Stereo/Analog/Vintage/Ultra/ Chorus - Stereo/Vintage/Dual Phaser - Rotary - Pitch Shifter - Vibrato and more...
• Dynamic FX: Compressor – Expander – Gated Reverb – An. Compr/Lim. — Ultramizer – Denoiser – De-Esser and more...
• Psychoacoustic FX: Exciter – Enhancer – Stereo Imager and more...
• Filter/EQ FX: Auto/LFO Filter – Parametric/Graphic EQ.
• The FX2000 is also equipped with distortion, amplifier and speaker simulation including Vocal/Tube distortion, Guitar Amp and more...
• Special FX:Vinylizer - Sampler - Vocoder - Voice Canceler - Resonator.

Σχόλια: Αναλογικό τηλεφωνικό υβρίδιο 2 τηλεφωνικών γραμμών, σχεδιασμένο για να ικανοποιεί τις απαιτήσεις των τηλεοπτικών και τα ραδιοφωνικών σταθμών. Βalanced είσοδοι και έξοδοι ήχου με υποδοχές XLR, έλεγχος στάθμης στο εμπρόσθιο τμήμα της συσκευής. Απομακρυσμένος έλεγχος αποδοχής-απόρριψης γραμμής, ενεργοποίησης-απενεργοποίησης τηλεφωνικής συνδιάσκεψης, ειδοποίησης εισερχόμενης κλήσης. Ενδεικτικό LED εμφάνισης των επιπέδων σήματος λήψης, αποστολής ή συνδιάσκεψης. Αυτόματη αντιστάθμιση ποιότητας γραμμής. Παρέχει δυνατότητα επέκτασης του συστήματος χρησιμοποιώντας επιπλέον συσκευές Μacrotel και επιτρέποντας τον έλεγχο δύο τηλεφωνικών γραμμών από μία είσοδο της κονσόλας.

GENERAL DATA
Power Supply 220 / 110V 25 VA
Dimension 434x351x44mm (1 rack unit)
Weight » 4 Kg
MEETING INTERFACE IN / OUT
Connector DB 9 female
Nominal in / out audio level 0 dBm
Input impedance 600 W / 10 KW (selectable)
Output impedance 100 W
* nominal line level: - 6 dBm
** it can vary depending on characteristics of telephone line
All measurements are intended at 1 kHz.
AUDIO PROGRAM IN / OUT
Connectors XLR, electr. balanced
Input impedance 600 W / 10K W (selectable)
Output level * - ¥ ¸ + 16 dBm
Output impedance 100 W
Noise on Receive output 2-Wire separation £ 25 dB**
4-Wire separation £ 70 dB
2-WIRE SECTION
Connector RJ11
Nominal input level - 6 dBm
Nominal output level - 6 dBm
Compensation mode Electronic, transf. decoupled
Impedance 600 W
4-WIRE SECTION
Connector Terminal block
Impedance 600 W
Nominal TX level 0 dBm
Nominal RX level 0 dBm

Manual

AXEL Compact telephone hybrid. Management of 1 wired PSTN / POTS line, electronically balanced input and output on XLR connector

Product Discription:

BoxTel MKII is an analogue telephone hybrid, designed to interface a telephone line with audio equipments. BoxTel MKII manages 1
POTS/PSTN line, whereas BoxTel GSM manages 1 GSM line to establish telephone connections where wired lines are not present.

A powerful internal microcontroller completely manages both BoxTel MKII and BoxTel GSM, allowing the configuration of the operating modes
via software. The internal microcontroller provides further functions such as adjustment of the line impedance according to the region,
visualization of the Send/Receive audio levels on the front leds, line detecting presence of a telephone line, buzzer with adjustable level,
AutoHook - automatic line hooking and answering after a certain number of rings. While BoxTel MKII is operative, its possible to exclude or
keep connected in parallel an external telephone set (Tel.Set).

The backlit Hook/Ring button on the front panel allows a quick management of the phone calls; each time a telephone call is incoming the
BoxTels Hook/Ring button starts to flash, by pressing it the operator answer the phone call. BoxTel MKII has the Line Detecting function,
which makes the Hook/Ring button switch on in presence of a telephone line.

BoxTel MKII and BoxTel GSM are devices equipped with an internal power supply enabling great audio performance: two separate
Send/Receive front potentiometers manage the audio level, with a total range of +/- 15dB. The input sensitivity is set at 0dBu while the
maximum output level is greater than +20 dBu.

The audio connections are separated for Send/Receive and are available over XLR electronically balanced connectors. A RJ11C connector
allows the telephone line connection (Tel.Line) and one more RJ11C connector performs the connection to an external telephone set (Tel.Set).
A GPIO port with optocouplers and open collector is provided to establish remote connections between BoxTel MKII and BoxTel GSM and
mixing console. It is possible to connect directly the Telco module of an Oxygen4, Oxygen5 and Oxygen7 console with BoxTel MKII/BoxTel GSM
by using a simlpe Pin-to-Pin cable. Internal universal power supply 90-264Vac/47-63Hz to operate worldwide.

Thanks to all of their features, BoxTel MKII and BoxTel GSM represent the telephone hybrids with the best quality/price ratio available on the
marketplace. BoxTel MKII and BoxTel GSM occupy ½ rack unit - LxHxD 22x5x13cm.

HIGHLIGHTS:

• Compact telephone hybrid
• 1 POTS/PSTN or GSM DualBand telephone line
• Send/Receive audio levels control and visualization
• Backlit Hook/Ring button
• Software configuration
• Phone call auto-answer feature
• International selection of the line impedance
• Remote control
• Potentiometer levels and front panel control
• Analogue Send/Receive balanced over XLR
• 1 USB port
• GPIO to remotely control Telco N-1 modules
   

• Dimension LxHxD 22x5x13cm
• AC Rate 230Vac / 110Vac 50 Hz / 60 Hz 30VA
• Type of power supply Switching power supply, worldwide
• Weight ≈ 2500 gr
• Operating Temperature -5°C / +50°C
  
  ANALOG INPUT MODULE (send)
• Connectors: XLR, female - Electronically balanced
• Operative Nominal Level: 0 dBu
• Line Impedance 10 kΩ (Electronically balanced selectable) EMIsuppressed
• Distortion: less than 0.01% TDH+NOISE (0.0dBu 1Khz)
• Input Modes: Mono
  
  ANALOG OUTPUT MODULE
  (receive)
• Connectors XLR, male - Electronically balanced
• Output Level 0dBu +4dBu +6dBu Max +20dBu
• Load Impendance 600 Ω
• Distorsion Less than 0.01% TDH+NOISE (0.0dBu @ 1Khz)
• Output Modes: Mono
  
  TELEPHONE MODULE PSTN / POTS
• Connectors LINE RJ 11C 6/4 socket
• Connectors SET RJ 11C 6/4 socket
• Bandwidth telephone line 100Hz 5kHz, -3dB @ 1 kHz
• Telephone line compliance ETSI TBR21, FCC Part68
• Isolation 3 kV
  
  REMOTE INTERFACE
• Digital Inputs GP In 2x GP In opto coupled. Only 1 is used as Hook
• Digital Outputs GP Out 2x GP Out Open Collector opto isolated. Only GPOut 1 is used as Ring
  
  Technical Specification about BoxTel MKII GSM (Additional )
• TELEPHONE MODULE GSM Module
• Standard DualBand GSM 900/1800 Mhz Phase 2+
• Frequency GSM 900: (Tx) 890 915 Mhz / (Rx) 935 960 Mhz
• GSM 1800: (Tx) 1710 1785 Mhz / (Rx) 1805 1880 Mhz
• Sensitivity -104 dB
• Channel bandwidth 200 kHz
• Maximum consumption 0.25 W / 0.5W
• Stand-by consumption
• Sensitivity -104 dB
• Dial tone frequency 450 Mhz Standard
• Environment noise
• Transmitting Power
• External Antenna 2.5 dBi omnidirectional with 1mt standard cable
• External power supply unit Input: 100-240 Vac Output: 12 V 500 mA
• External Antenna connector SMA
• Total rechargeable battery time 6 h
• PSTN / POTS connector RJ 11C 6/4 socket
• Operating temperature 0°C ≈ +45°C
• EN COMPLIANCY for GSM Modul EN 60950-1
• EN 301 489-1/-7
• EN 301 511