The Radial J48 has been designed from the ground up to deliver the most natural tone. As a direct box manufacturer, we do not believe it is our task to alter the sound of your prized ‘1962 Fender Jazz Bass’, but retain and transfer the true character of the instrument to the mixing console without […]
The Radial J48 has been designed from the ground up to deliver the most natural tone. As a direct box manufacturer, we do not believe it is our task to alter the sound of your prized ‘1962 Fender Jazz Bass’, but retain and transfer the true character of the instrument to the mixing console without adding distortion or introducing artifact. This design philosophy has gained a tremendous following from many of the world’s most demanding musicians.
Using only 48V phantom power, the Radial J48 is an active direct box that produces an exceptionally linear response that extends from 20Hz up to well above 40kHz. Low distortion of all types is achieved via a unique digital switching power supply that raises the internal operating rail voltage for added headroom and improved signal handling. The results are truly amazing. The J48 delivers an ideal even-order harmonic cascade and a sonic performance that outperforms DIs costing several hundreds more.
And like all Radial products, the J48 is both feature-rich for studio and made tough to handle the road. This includes a -15dB input pad to tame extra loud signals, 180º polarity reverse for feedback control on stage and a ground lift to help reduce hum & buzz caused by ground loops. Special features include a merge function that elegantly mixes left-right signals to mono without phase cancellation. To minimize resonant feedback with acoustic instruments, the J48 is also equipped with an 80Hz high-pass filter (low-cut). When engaged, this also increases headroom by eliminating unneeded bass frequencies.
Radial’s innovative book-end design protects switches and connectors from abuse while the internal I-beam construction eliminates stress on the PC board. This serves to reduce solder joints from going ‘cold’ and delivers trouble-free performance for years. A full-bottom no-slip pad provides mechanical and electrical isolation while providing plenty of ‘stay-put’ for rockin’ stages!
The Radial J48 is used by artists as diverse as acoustic guitarist Tommy Emmanuel; super-star engineer Joe Chiccarelli; and one of the most successful bands of all time Fleetwood Mac. The Radial J48… the world’s finest 48V phantom powered active direct box.
Features:
Ultra low distortion of all types
Exceptional headroom & dynamic range
Retains instrument’s natural sound
Powered by 48V phantom
Weight
1.00 kg
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The Radial J48 has been designed from the ground up to deliver the most natural tone. As a direct box manufacturer, we do not believe it is our task to alter the sound of your prized '1962 Fender Jazz Bass', but retain and transfer the true character of the instrument to the mixing console without adding distortion or introducing artifact. This design philosophy has gained a tremendous following from many of the world's most demanding musicians.
Using only 48V phantom power, the Radial J48 is an active direct box that produces an exceptionally linear response that extends from 20Hz up to well above 40kHz. Low distortion of all types is achieved via a unique digital switching power supply that raises the internal operating rail voltage for added headroom and improved signal handling. The results are truly amazing. The J48 delivers an ideal even-order harmonic cascade and a sonic performance that outperforms DIs costing several hundreds more.
And like all Radial products, the J48 is both feature-rich for studio and made tough to handle the road. This includes a -15dB input pad to tame extra loud signals, 180º polarity reverse for feedback control on stage and a ground lift to help reduce hum & buzz caused by ground loops. Special features include a merge function that elegantly mixes left-right signals to mono without phase cancellation. To minimize resonant feedback with acoustic instruments, the J48 is also equipped with an 80Hz high-pass filter (low-cut). When engaged, this also increases headroom by eliminating unneeded bass frequencies.
Radial's innovative book-end design protects switches and connectors from abuse while the internal I-beam construction eliminates stress on the PC board. This serves to reduce solder joints from going 'cold' and delivers trouble-free performance for years. A full-bottom no-slip pad provides mechanical and electrical isolation while providing plenty of 'stay-put' for rockin' stages!
The Radial J48 is used by artists as diverse as acoustic guitarist Tommy Emmanuel; super-star engineer Joe Chiccarelli; and one of the most successful bands of all time Fleetwood Mac. The Radial J48… the world's finest 48V phantom powered active direct box.
Features:
Ultra low distortion of all types
Exceptional headroom & dynamic range
Retains instrument's natural sound
Powered by 48V phantom
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
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
Active DI-Box SM-60
The electronic Direct-Injection Box SM-60 allows direct connection of electronic music instruments such as keyboards, synthesizers, electric and electronic pianos, etc. with mixing consoles in PA-systems and in recording studios. The SM-6 is designed for applications, where a passive DI-Box does not perfom satisfactorily, i.e., where the output level of a passive DI-Box is too low for the microphone input section of the mixing desk. Because the input impedance of the SM-6 is above 5 MOhm, instrument outputs are not loaded or in any other way adversely affected. The voltage ratio from input to output is 1: 1 and is always sufficient for connection with any microphone input. Input connectors are 1/4" phone jacks, output connector is a Switchcraft D3M; output is 600 Ohms, transformer balanced. The output level may in certain cases overload microphone inputs - the line input section of the mixing console must then be used for connecting the SM-6. The unit operates with a 9 V battery or phantom powering from 24 to 48 volts.
Technical Data
input impedance > 5 MOhm max. input impedance + 6 dBu, 1,55V ouptut impedance 600 Ohm frequency response 20 ... 20000 Hz, ± 0,2 dB gain 1 : 1 THD < 1 % at 30 Hz < 0,7 % bei 40 Hz powering 9-V battery (IEC 6LF22) or phantom power 24 ... 48 V. inputs two 1/4" phone jacks , unbalanced (one being used as output to instruments amp) outputs XLR, balanced pin 1 = ground, pin 2 = hot, pin 3 = cold case aluminium die-cast weight 240 g dimensions 113 x 71 x 37 mm
Phantom or battery powered in a rugged steel chassis, with separate Speaker Level input connector
The ARX DI-PLUS represents another major step forward in active direct boxes. Packaged in a single channel stand-alone format, the DI-PLUS represents a fresh look at active D.I. concepts. Precision engineered Ultra quiet, ultra clean circuitry delivers maximum headroom whatever the signal. Premium grade components, plus an all-steel chassis gives excellent hum and noise specifications and superb audio quality in a tough, roadworthy package. Level control The DI-PLUS features a Normal gain high impedance unbalanced input on the front panel, running to a balanced XLR output on the rear. There is also a separate -40dB Speaker Level input for signal coming from the External (auxiliary) speaker output of an amplifier. A a global Pad switch drops both the normal input and the speaker input by a further 20dB, making it suitable for all applications, from the softest keyboard to the hottest broadcast levels.
Battery compartment The revolutionary simple 'clamshell' action of the DI-PLUS battery compartment makes battery changing extremely easy, even on the darkest stages. A 9v alkaline battery snaps into a PCB mounted battery holder for fast, secure location. No fragile battery clip leads to break, no tools required, no screws to lose. Production crew heaven!
Automatic Phantom switching The DI-PLUS will automatically switch itself to the console's own Phantom Power, if available, and an LED will indicate this mode. Turn the Phantom Power off and it will instantly revert back to battery mode. Rugged all-steel case A lot of direct boxes are fitted into brittle cast alloy cases. Not this one! The tough all-steel inner and outer chassis of the DI-PLUS provide excellent RF/EMF shielding while making it a sturdy, heavy duty unit that is hard to dislodge, and hard to leave behind.
Rear panel showing XLR connector, ground lift switch, and captive screw for opening up the unit for battery changing
Whether you're a Studio or Live Sound engineer, installation contractor, or broadcast engineer, you want all the dynamics and clarity of the original sound source transferred to the mixing console. The ARX DI-PLUS provides a rugged, no-compromise solution to all direct injection and signal balancing requirements.
T E C H N I C A L S P E C I F I C A T I O N S: Max Input Level +13 dB Phantom powered +6 dB Battery powered Input Impedance 1 Meg Ohm Max Output Level +17 dB 10K Ohm load Phantom powered +12 dB 10K Ohm load Battery powered +11 dB 600 Ohm load Phantom powered +12 dB 600 Ohm load Battery powered Output Impedance 680 Ohms Balanced Output Signal to Noise -100 dB unweighted -104 dB A weighted Dynamic Range 117 dB 10K Ohm load Phantom powered 112 dB 10K Ohm load Battery powered 111 dB 600 Ohm load Phantom powered 107.5 dB 600 Ohm load Battery powered Distortion 100 Hz .0027%, 1KHz .0028%, 10KHz .0037% Frequency Response 20Hz to 20KHz, ± 0.2 dB Gain through Unit: 6dB (Normal input, Pad switch out) Pad Switch: -20 dB attenuation Speaker Input -40 dB attenuation, equivalent to 100:1 decrease in input level -60 dB attenuation available with Pad switch Input Connectors Insulated jacks (!!!Note that the Input connector switches the unit on when a plug is inserted. Remove plug when storing to avoid battery drain!!!) Output Connector 3 pin XLR. Wired Pin 1 Ground, Pin 2 + Hot, Pin 3 - Cold. With Audio Ground (Pin 1) lift switch Construction All-steel chassis, fibreglass PCB Battery Access Twist connector opens chassis, snap-in battery holder inside. No tools required
Standard active DI box. Can be operated with 9 V batteries or 48 V phantom power. High-impedance input; higher output level than with a passive DI box. Active circuitry allows for high input impedance ( 1 meg. ohm) and higher input sensitivity (typical difference between in and out -4 dB). Maximum output impedance with phantom power operation +10 dB. Output: transformer balanced. The special "floating ground" circuitry enables ground lift even during phantom power operation. Metal case 110 x 73 x 42 mm.
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