Reverse DI Box Users frequently attempt to connect a DI box in reverse in order to feed a balanced signal into an unbalanced input. Because of mismatching, however, this leads to unsatisfactory results. With the PDIR01 (DI-REVERSE), we offer a box that provides a perfect technical solution to the problem without using adapters. Type: passive […]
Users frequently attempt to connect a DI box in reverse in order to feed a balanced signal into an unbalanced input. Because of mismatching, however, this leads to unsatisfactory results. With the PDIR01 (DI-REVERSE), we offer a box that provides a perfect technical solution to the problem without using adapters.
Type: passive
Number of channels: 1
Number of inputs: 1
Input connections: XLR/f
Max. input level: +6dBu
Input impedance: 2 kohms
Number of outputs: 1
Output connections: 6.3 mm jack
Max. output level: +6dB
Output impedance: 2 kohms
Frequency range: 20Hz – 20kHz
Transformer balanced: yes
Transformation ratio: 1:1
Controls: Ground lift
Housing material: Sheet steel
Housing surface: powder-coated
Width: 110 mm
Depth: 35 mm
Height: 39 mm
Weight
0.17 kg
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Users frequently attempt to connect a DI box in reverse in order to feed a balanced signal into an unbalanced input. Because of mismatching, however, this leads to unsatisfactory results. With the PDIR01 (DI-REVERSE), we offer a box that provides a perfect technical solution to the problem without using adapters.
Type: passive
Number of channels: 1
Number of inputs: 1
Input connections: XLR/f
Max. input level: +6dBu
Input impedance: 2 kohms
Number of outputs: 1
Output connections: 6.3 mm jack
Max. output level: +6dB
Output impedance: 2 kohms
Frequency range: 20Hz - 20kHz
Transformer balanced: yes
Transformation ratio: 1:1
Controls: Ground lift
Housing material: Sheet steel
Housing surface: powder-coated
Width: 110 mm
Depth: 35 mm
Height: 39 mm
You're serious about getting rid of all that excess noise on stage, but you've got so many line instruments you don't know where to start. The ADB-4 from Stewart can take care of all your high impedance problems. The ADB-4 is 4 active direct boxes, all in a module that only takes up half a space on your keyboard rack. It's a rugged, durable piece of equipment that packs a lot of DI power.
? Requires phantom power or 9v battery ? Ground lift switch ? Instrument or speaker level switch ? Transformerless ? Can be used with amp up to 400w ? RF shielding
Inline Transformer IA-2
The model IA-2 line matching transformers !S designed to properly match a low impedance signal to a low impedance source. The advantage of "ground lift" switching allows to optmize hum problems.
Technical Data Frequency response 20 Hz - 20 KHz + 1 dB Impedance 600 : 600 Ohm THD K3 50 Hz = 0.5 % Level < + 6 dBm Weight 100 g Dimensions diameter 17 mm, lenght 115 mm
Tube-buffered DI-Box DI-1000
The Tube-Buffered DI-Box DI-1000 allows the extraction of all the musical details of musical interfaces without degrading the sound. This can only be achieved by providing a very high input impedance to avoid any loading of instrument pickups.This design approach allows seemingly infinite headroom to preserve the real dynamic range of the interfaced instruments.A vacuum tube enables all these goals to be achieved without any compromises in sound quality.The sonic difference between a standard DI-Box and the Tube-Buffered DI-Box is comparable to the musical resolution difference between a standard microphone and a studio microphone.One of the best transformers, the very transparent sounding JENSEN JT-DB-E, was chosen providing complete ground isolation. The parameters of this transformer, like frequency response, phase response, group delay and geadroom capabilities, play a vital part in the performance of this DI-Box.
Technical Specifications Input The signal of the instrument is directly fed to the tube circuit with > 20 MOhms input impedance to prevent any signal degradation, inevitable in traditional designs. Buffered Output“ The second stage of the vacuum tube is used to buffer the signal and lower the output impedance to < 8 kOhms. This unity gain output allows for cable runs of 10 meters without loosing high frequency information. Boost circuit The boost circuit increases the signal send to the output transformer by 15 dB. This may be useful for instruments with extremely low output, but decreases headroom capability to 6 Volt rms. Under these circumstances the signal may be clipped, concerning the output transformer?s signal, which gives you 2nd harmonic tube-like distortion. This distortion normally does not occur - but is sometimes desirable, being the reason for this special feature. Unity circuit The unity circuit feeds a low distortion unity gain signal to the JENSEN output transformer. This gives the best possible sound quality. Ground-lift“-Switch This front panel mounted switch allows complete ground and electrical isolation between the direct injection box and the console or recording device.
Mechanical Specifications Cabinet 2 mm stainless steel Front- and rear-panel 1,5 mm stainless steel lasercut and photo-chemically etched Dimensions 185 x 100 x 40 mm Vibration insulation 4 high-compliance rubber-elements Operating Voltage 220/110 V AC, selectable via rear panel mounted switch. The fuse is easily accessible from the rear panel. IEC mains connector with optional fixture. Construction details Double sided glass fibre contacted PCB with 70 mm copper plating. 1% metal film resistors and the finest polypropylene capacitors are used in the signal path. MIL type Switchcraft jacks and high performance switches ensure flawless operation. The power supply is optimised via measurement quality toroid transformer and a low impedance design to ensure the lowest possible noise. Through a double sided PCB all parts are roadworthy secured. A waterclear blue LED perfects the aesthetics of the DI box.
Technical Data Input impedance > 20 MOhm Output impedance180 Ohm at 1 kHz Frequncy response 20 Hz - 20 kHz (-0,1 dB) 5 Hz - 120 kHz (-3 dB) THD at 0 dBv 0,06% at 20 Hz 0,04% at 1 kHz 0,035% at 20 kHz Signal to Noise Ratio 86 dB Tube ECC 83/7025 A - military E 83 CC optional Output transformer JENSEN JT-DB-E Polarity Pin 2 Hot , AES/IEC -Standard Max. Input voltage > 30 V peak
At dbx, when we do something, we do it right. So when we decided to create our new direct injection boxes, we didnʼt settle for the same old tired approach to direct box design. With our dbx name on the line, how could we? One look at our new dB10 Passive and dB12 Active direct boxes will tell you that these are clearly different. With their bullet-proof construction, and extraordinary audio performance to rival their looks, finally thereʼs a direct box worthy of the dbx name.
Utilizing custom dbx mu-metal-shielded audio transformers, high-quality Neutrik® connectors, and low-noise circuitry preserves the sonic integrity and true characteristics of the signal source. Both boxes include a pad switch that accomodates instrument, line and even speaker level signals. Take even more control of your sound by utilizing the polarity invert switch to set the phase relationship between the direct and mic'd sound.
As a professional, you donʼt have time for interference, so weʼve included a ground lift switch to solve potential hum and buzz problems due to ground loops. And between the combined shielding of the cast metal chassis and the custom-wound transformer, you can be doubly assured of a clean signal free from interference. All of this sits atop a solid, stable footprint, that will keep the box from being dragged around the stage, and the unique contoured underside allows secure stacking of multiple units.
So whether you need to control the level, placement in the mix, or overall characteristics of 4 independent signals or control the gain leveling on a couple of stereo pairs, the dbx dB12 is for you.
Thru Output: 1 parallel connection from input jack
Connector: 1/4" jack
Type: Unbalanced, RF filtered
Main Output: 1 line level
Connector: XLR male jack
Type: Balanced
Impedance: 150 Ohm typical
Max Output Level: 0dBu
PERFORMANCE
Transformer: Custom dbx mu-metal-shielded
Frequency Response: 20Hz to 20kHz, +/-2.5dB
Noise:
THD:
GENERAL
Dimensions: 5.82" L X 5.44" W X 2.20" H (148 x 138 x 56mm)
Weight: 1.4 lbs / 0.65 kg
Note: Specifications subject to change without notice.
User´s Manual
LD Systems LDI02
DI Box active
Active DI box in a sturdy metal housing (aluminium/steel) with protective corners, silver-blue metallic, internal battery (9 V flashes during operation) is switched off automatically when phantom power is used (LED permanently illuminated),
extremely low battery consumption. Battery: 9 V block (not included).
Product type DI Boxes
Channels 1
Inputs 2
Input connectors 6.3 mm Jack , XLR
Max. input level + 10 / + 30 dBu dBu
Input impedance 1 M Ohm(s)
Outputs 1
THRU outputs/channel 1
Output connectors XLR
Frequency response 20 - 20.000 Hz
THDIndicators Power
Controls ground lift , Power
Operating voltage +48 V phantom power , 9 V block
Cabinet material metal
Cabinet surface painted
Width 135 mm
Depth 128 mm
Height 53 mm
Weight 0,645 kg
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