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 Anthony DeMaria Labs

 
adl1000flat3.jpg For an In-Depth Look at the ADL 600
click here
 
click for larger view

 
 

ADL 600 Awarded a
TEC Nomination
!

The ADL 600 designed by Anthony DeMaria and manufactured and distributed by PreSonus Audio, has been awarded a TEC Nomination by the Mix Foundation for outstanding technical achievement in Microphone Preamplifier Technology.

TEC Award ballots have been distributed in the August Issue of Mix Magazine.

If you subscribe to Mix Magazine please take a moment and cast your vote for the ADL 600!

For a complete list of nominees please click here.

Several years ago, Anthony DeMaria, President of Anthony DeMaria Labs and Jim Odom President of PreSonus met at an AES show in New York. Jim noticed a prototype microphone preamplifier lurking in the back of the ADL booth and was intrigued. After chatting with Anthony about the design – three tubes per channel, dual input/output transformers, 600 volt power rails – he had to hear it. Totally floored by the mammoth sound and complete absence of noise, Jim was convinced this was a match made in sonic nirvana. Designed by Anthony DeMaria Labs, engineered and manufactured by PreSonus in the USA, the ADL 600 is a microphone preamplifier that has a sonic character like no other.

The ADL 600 is an original high voltage two-channel microphone preamplifier designed by world-renown analog tube circuit designer Anthony DeMaria. The ADL 600 utilizes a unique high voltage, Class A discrete design with three vacuum tubes per channel for maximum headroom and tonality. The ADL 600 is built by hand in the USA by PreSonus and utilizes the finest components in the world including switched attenuators, military-grade vacuum tubes, analog VU and LED meters, custom-designed proprietary transformers, and the list goes on. No expenses are spared with the ADL 600 down to the last polypropylene film capacitor. The ADL 600 is big, warm, smooth, and clear; a sound like no other.

Control and Flexlibility
The ADL 600 is designed for ulitimate sonic performance, however its ease of use and flexibility allowing for many types of input sources further sets it above all other preamplifiers. The input selector allows for selection between Hi-Z instrument input, line input and four different microphone impedances for a wide variety of sounds and applications. The High Pass Filter is a rotory switch with three filter settings (40Hz, 80Hz, and 120Hz @ 6dB per octave) for passiively and unobtrosivly controlling room rumble and low frequency noise. The input gain attenuator is a military-grade rotory switch delivering 5dB step increments and a total preamplifer gain of over 72dB. The output stage is contolled by a fully variable conductive plastic attenuator delivering +/-10dB of fine tune trim adjustment to "dial-in" the perfect gain structure for the application at hand. The ADL 600 also includes 48V phantom power and a -20dB pad both controlled by big sturdy military grade switches.

Under the Hood
The ADL 600 is built with the finest components available in the world. The ADL 600 is a fully discrete transformer input and output Class A design incorporating three military-grade vacuum tubes per channel operating at voltages of +/-300V power rails for maximum tube tonality and headroom. There are no op-amps or integrated circuits (IC's) in the signal path to ensure the purest sound possible. The dual tranformer design also ensures ultral low noise operation with maximum common mode rejection.

Metering
The ADL 600 is loaded with both fast-acting eight-segment LED meters for acurately detecting fast transients and peaks, as well as large high quality analog VU meters for metering output level.

Breathtaking
The ADL 600 sets a new standard in tonatily for tube preamplifiers. Vocals become big, smooth and articulate, bass guitars are deep and tight, and mixes become richer than ever. The ADL 600 is breathtaking both in terms of appearance and in sound performance. The ADL 600 delivers a sound like no other.

For an In-Depth Look at the ADL 600 click here
 
FEATURES INCLUDE

 
  • Class A High Headroom Transformer Coupled Microphone Preamplifier
  • High-Voltage Class A Dual Transformer Design
  • >73dB Gain
  • Selectable Microphone Input Impedance
  • Switched Gain and Variable Fine Trim Controls

PHOTO GALLERY

  • Microphone, Instrument and Line Inputs
  • Ultra Low Noise (-100dB S/N ratio)
  • Variable High Pass Filter, 48V, -20dB Pad, Polarity Invert
  • Analog VU and Fast-Acting LED Metering
  • Price: $2,295

 

 


click for larger view

click for larger view

 
  There's no doubt that the original Fairchild 670 was and still is the "Big Daddy" of tube compressors. That's why people don't hesitate to pay over $30,000 for one if they can find it. Unfortunately, most of these units are getting very old and unreliable and don't sound as great as they once did. Well, what if you could buy a brand new one today...with a warranty...for substantially less!!! Can't be...well, guess again!!

Introducing the ADL 670, the perfect copy of the original Fairchild 670. After years of testing and research, Anthony DeMaria Labs has matched part for part the specs and sound of the original unit. Every detail has been scrutinized to perfection...no corners were cut. Yes...believe it or not, ADL has painstakingly sourced all the parts of this puzzle to offer a very limited run on these uncompromised, untouchable sonic giants!!! Many in the past have attempted to reproduce the sound of the classic Fairchild 670 but no one until now has taken it to the level ADL has with the ADL 670 compressor. With it's beautiful "military strength" chassis, stand alone PSU, 20 vacuum tubes and 14 transformers...it doesn't get fatter than this. Call ADL today to find out more. Somebody had to do it.

We also carry direct replacement parts based on original Fairchild 670 design. Please call ADL today for further details.
 
FEATURES INCLUDE
 
  • All tube design (no IC's or chips)
  • All parts are designed based on the original Fairchild 670
  • All capacitors and resisters match values as per original
  • XLR input / output
  • Handbuilt in the USA
  • Heavy-Duty Chassis
  • Handles located on front and sides
  • Great for analog & digital recording, tracking, mastering, as well as live
  • One Year limited warranty
  • Vents on front and sides for maximum air flow
  • Two 24 volt fans (voltage set at 20 volts for silent operation)
  • One Bottom PCB (Hinged Standoff)
  • One Top PCB (Hinged Standoff)
  • Two Back PCB's
 
SPECIFICATIONS
+4 input / 600-ohm Load Unit Gain Clockwise :
15.1dB @ +4 Output
Noise -82.6 with 400-Hz Filter = 89.2
THD 0.028% @ 100-Hz : 0.189%
IMD 0.100%
Frequency  Response 50-Hz............20-k (± 1db)
Input / Output Impedance 600-ohm
Output Level +4 or +8 VU (+27 dBm clipping point)
Gain 7 db (no limiting)
Attack Time (adjustable) 0.2 milliseconds in Pos-1, 2 and 6
0.4 milliseconds in Pos-3 and 5
0.8 milliseconds in Pos-4
Transformers 14 total - same as original
Tube Complement -8- 6386
-2- 12AX7A
-2- 12BH7A
-4- 6973
Main Unit Rack Space 6-U high, 13-1/2"depth
Main Unit Shipping Weight 45 lbs.
   
  POWER SUPPLY FEATURES  
 
  • Remote Power Supply
  • One PCB
  • Detachable AC Cable
  • Front Power Switch
  • Keep All Vents Clear of Obstructions
  • R-313 - This pot sets B+ voltage, must be set at 240 volts
  • Remote Power Umbilical Cable - 18-gage 600 volt multi pin five foot cable
  • Rear Tube Fan - power to fan set at 20 volts for silent operation
  • Front Blue Grill Lamp - indicates power to fan, if this lamp is off must check all three fans, 1-installed in power chassis and two in main unit. If unchecked may cause serious overheating
  • Fuse - 5 amp S/B 5x20mm
  • Tube compliment - (1) 6084, (1) 5651, (1) EL 34, (1) GZ 34
  • Power Requirements - 120 volts, 50-60 cycles
  • Rack Space - 3-U High, 14" Depth
  • Shipping Weight - 42 lbs.

ADL 660 Mono Fairchild Limiter
  ADL 660
 
FEATURES INCLUDE
  • All tube design (no IC's or chips)
  • All parts are designed based on the original Fairchild 660
  • All capacitors and resisters match values based on original Fairchild 660 / 670
  • XLR input / output
  • Handbuilt in the USA
  • Heavy-Duty Chassis
  • Great for analog & digital recording, tracking, as well as live
  • One Year limited warrenty
  • Tubes located in the rear for maximum ventilation
  • 24-VDC Cooling fan
  • Two PCB's
  • 3 U High chassis with swing down door as faceplate
  • ADDED FEATURE: DC threshold is located on front panel allowing for more of a tailored compresssion setting
  • recall sheet
 
SPECIFICATIONS

All audio transformers are designed according to original specifications which has allowed us to not only serve our needs, but also service and repair original 660 and 670 Fairchilds.

+4 input / 600-ohm Load Unit Gain Clockwise :
15.1dB @ +4 Output
Noise -82 with 400-Hz Filter = 89
THD 0.03% @ 100-Hz : 0.189%
IMP 0.100%
Frequency  Response 32-Hz............63-k (± 1db)
Input / Output Impedance 600-ohm
Output Level +4 or +8 VU (+27 dBm clipping point)
Gain 7 db (no limiting)
Attack Time (adjustable) 0.2 milliseconds in Pos-1, 2 and 6
0.4 milliseconds in Pos-3 and 5
0.8 milliseconds in Pos-4
Transformers 4 as per original
Tube Complement -4- 6386
-1- 12AX7A
-1- 12BH7A or 12AU7A
-2- 6973
Main Unit Shipping Weight 25 lbs.
   
  POWER SUPPLY FEATURES
 

ADL has developed a non-tube proprietary discrete design. This new power supply is versatile enough to be used with either the ADL Mono 660, Stereo 670, or the original 670 Fairchild. ADL has started to integrate this new power supply with the original 670 units too.

 
  • Remote Power Supply eliminating any transformer magnetic noise
  • 6 foot umbilical custom cable between power supply and main unit
  • 3 U High chassis
  6 Blue LED Indicators Displaying Low Voltages
 
  • 6386 Heaters 6.3-VDC
  • Remaining Four tube heaters 6.3-VDC, plus meter lamp
  • Ventilation Fans
  • 6386 bias voltage negative 6.2-VDC
  • 6386 Q point voltage negative 19.9-VDC
  • 6973 grid voltage negative 14.6-VDC

Additional High Voltages Include

  • 442-VDC
  • 242-VDC
  • 160-VDC

TRANSFORMERS.......................................2
SHIPPING WEIGHT....................................31 Lb
POWER CONSUMTION.............................47.5 WATTS
120-VAC FUSE............................................2-A S/B 5x20mm
230-VAC FUSE............................................1/2-A S/B 5x20mm

6386 BIAS VOLTAGE NEGATIVE 6.2-VDC
This voltage feeds both cathodes (pin-2, 8) of each half of the 6386, allowing the tube to operate at its' peak performance. As elevtrons befin to gather near the filament, they need a slight push toward the plate and because the grid is slightly more negative then the filament the electrons are pushed away from the grid and towards the plate.

6386 Q POINT VOLTAGE NEGATIVE 19.9-VDC
This voltage connects into the A-26 audio transformer which then feeds both grids (pins-3, 7) of each half of the 6386. Its' purpose is to set the operating or quiescent point. Because this voltage is negative relative to the cathode, it will draw electrons away from the filament and toward the plate which is considered positive in respect to the grid. Every tube has an operating window or region in which the tube operates at its' best performance. According the 6386, a negative voltage of 19.9-VDC will allow the tube to operate at its' peak performance facilitating proper electron flow from the filament to the grid.

6973 GRID VOLTAGE NEGATIVE 14.6-VDC
This voltage connect to the grid (Pin-3). As described before, this voltage sets the operating zone or window allowing the tube to operate at its' peak performance.




adl1000flat3.jpg OWNER'S MANUAL
  ADL 1000 panel.jpg
  The ADL 1000 Tube Compressor/Limiter is a brilliant all discrete design providing phenomenal dynamic range with a clear, punchy, warm sound!  Its "invisible" compression has made the ADL 1000 a very in-demand item.  Each unit is handbuilt with the very finest workmanship available.  So why settle for less?  Find out today why so many people are using the ADL 1000 Tube Compressor/Limiter­the "fattest" sound around!
 
FEATURES INCLUDE
 
  • balanced input and output
  • XLR input and output jacks
  • Stereo linking capability
  • Wide dynamic range (15Hz - 30K)
  • Works with unbalanced systems
  • Easy to operate

    SPECIFICATIONS
  • Handbuilt in the USA
  • Heavy-duty chassis
  • Great for analog & digital recording as well as live sound
  • All tube design (no IC's or chips)
  • Opto attenuators for "invisible" compression
  • High quality transformer
  Frequency  Response

Clip

Distortion

Noise

Input/Output Impedance

Gain Reduction

Gain

Attack Time

Release Time


Panel Size

Panel Controls


Power

Fuse


Tube Complement

Shipping Weight
15Hz-30kHz  ± 0.5 dB

+22

@+4 + 0.75%  @+20 + 0.18%

-80 dB

600 Ohm Balanced XLR

40 dB

40 dB ± 1 dB

10 uSec.

Approx 0.07 Sec. for 50% Release, 0.5 Sec. to 4 Sec. for Complete Release

Standard Two Rack Space (2U)

Gain Reduction/Output +4 Switch Gain, Peak Reduction

117 (Standard), 240 (Available on Request)

100-120-V    1/2-A    S/B 5x20mm
220-240-V    1/4-A    S/B 5x20mm

(2) 12AX7A, (1) 12BH7A, (1) 6AQ5A

12 lbs.

adl1500flat3.jpg OWNER'S MANUAL
  ADL1500 panel.jpg
  The ADL 1500 Stereo Tube Compressor/Limiter is a brilliant 2 channel, all tube design, providing phenomenal dynamic range with a clear, punchy, warm sound! Its "invisible" compression has made the ADL 1500 a very in-demand item. Eight vacuum tubes give the ADL 1500 its unmistakable richness and depth. Find out why so many people depend on the ADL 1500 Stereo Tube Compressor -  the "fattest" sound around!!!
 
FEATURES INCLUDE
 
  • All tube design (no IC's or chips)
  • Opto attenuators for "invisible" compression
  • High quality transformer balanced inputs and outputs
  • XLR input and output jacks
  • 2 independent channels


    SPECIFICATIONS
  • Stereo link switch on front panel
  • Stereo adjust pots on front panel
  • Wide dynamic range (15Hz - 30K)
  • Works with unbalanced systems
  • Handbuilt in the USA
  • Heavy-duty chassis
  • Great for analog & digital recording as well as live sound
  Frequency Response

Clip

Distortion

Noise

Input/Output Impedance

Gain Reduction

Gain

Attack Time

Release Time


Panel Size

Panel Controls


Power

Fuse


Tube Complement

Shipping Weight
15Hz-30kHz  ± 0.5 dB

+22

@+4 + 0.75%  @+20 + 0.18%

-80 dB

600 Ohm Balanced XLR

40 dB

40 dB ± 1 dB

10 uSec.

Approx 0.07 Sec. for 50% Release, 0.5 Sec. to 4 Sec. for Complete Release

Standard Two Rack Space (2U)

Gain Reduction/Output +4 Switch, Stereo Link, Gain, Peak Reduction & Power

117 (Standard), 240 (Available on Request)

100-120-V    1-A    S/B 5x20mm
220-240-V    1/2-A    S/B 5x20mm

(4) 12AX7A, (2) 12BH7A, (2) 6AQ5A

20 lbs.
 

adl1500flat3.jpg
  ADL1500 panel.jpg
  Anthony DeMaria Labs would like to introduce you to our newest addition to the product line, the ADL O/S/L 1600. The 1600 is everything our tube limiter is except no tubes. That's right, a discrete LA-3A type design, transformers in/out, stereo or dual mono operation and hand matched opto attenuators.
 
FEATURES INCLUDE
 
  • All discrete design
  • Hand matched opto attenuators
  • Audio transformers in / out
  • Two independent channels


    SPECIFICATIONS
  • Front stereo link switch
  • XLR input / output jacks
  • Handcrafted in the USA
  Response

Distortion

Gain Reduction

Noise

Gain Selectable

Output Level

Input Level


Attack Time

Release Time

Input / Output Impedance

Power

Fuse
± 0.5 dB, 20hz...20kz

0.35% @ +24

40 dB

80 dB

30 / 50 dB

+20 dBm Nom. +27 dBm Max

0 dBm Max @ 50dBm
+20 dBm Max @ 30 dBm

Approx 1.5 ms

Approx 0.02 Sec. for 50% Complete Release 0.04

600-ohm

100/115/230-V 50-60hz 35 watts

100-120-V    1/2-A S/B    5x20mm
220-240-V    1/4-A S/B    5x20mm
 

adl300flat3.jpg OWNER'S MANUAL
  We are still serving the 300-G, but we are no longer manufacturing these units.
  300g panel.jpg
  The ADL 300-G is a state-of-the-art all discrete stereo tube direct box featuring 2 independent channels of pure tube direct. This all new design features (3) vacuum tubes, gain control and front panel AC power switch. The punchy, warm sound of the ADL 300-G is a compliment to any audio systems particularly "all digital" formats. Bass, guitar and keyboard tracks will "come alive" with the ADL 300-G.
 
FEATURES INCLUDE
 
  • All tube design (no IC's or chips) - 3 vacuum tubes
  • Two independent channels
  • Switchable outputs - Through Tube or Direct Out
  • Ground lifts
  • Transformer outs
  • Easy to operate
  • Handbuilt in the USA


    SPECIFICATIONS
  • Heavy-duty chassis
  • Rackmountable or stand alone (up to 4 ch in 1 rack)
  • Wide dynamic range
  • Great for analog & digital recording as well as live sound
  • Perfect for stereo keyboards, guitars, bass, acoustic instruments, drum machines, samplers & digital recorders
  Frequency Response

Signal to Noise

THD

Gain (Input to Output)


Tubes

Rack Size

Power

Fuse
± 1db 5 Hz to 70 kHz

-94 dB

1 kHz = .035%

Unity to +20 dB (1/4" through tube output)
-30 to -10 dB (XLR transformer output)

Tubes(3) Sovtek 6922/6 DJ8

Rack Size1/2 rack x 2U

Power100, 120, 220 230 or 240 volts at 10 watts

100-120-V    1/2-A   S/B    5x20mm
220-240-V    1/4-A   S/B    5x20mm

 
LA-2A LA-3A OWNERS

Before you buy new T4-B Optical Attenuator, have it rebuilt at a fraction of the cost. Also stock new OPTO's

 
site last updated June 21, 2007
© Copyright 2007 Anthony DeMaria Labs.  All rights reserved.