Radial Pro D2 passive stereo DI box

The Radial ProD2 is a compact stereo direct box developed specifically to address the needs and challenges of interfacing a stereo keyboard to a professional audio system. This passive DI features two independent channels with separate inputs and thru-puts for the artist's stage amp and two fully isolated outputs for the PA system.

At the heart of the design are two high performance Eclipse ET-DB2 transformers. These deliver 20Hz to 20kHz performance with less than 1.5dB deviation above 18kHz and are able to withstand tremendous signal levels without distortion. Unlike active circuits that overload when the signal exceeds the rail voltage, transformers saturate. This creates a pleasing effect that naturally rounds out the tone, acting like a subtle limiter which is particularly advantageous when interfacing the ProD2 with digital pianos, samplers and drum machines that can produce excessive dynamics. Transformers are particularly adept at eliminating hum and buzz caused by ground loops.

As with all Radial products, the ProD2 is built tough to handle the rigors of professional touring. A 14-gauge steel ultra rigid i-beam skeleton frame eliminates opportunity from outside stress to flex the sensitive PC board and cause premature solder joint failure. The innovative book-end design creates a protective zone around the connectors and switches further increasing lifespan. And a full bottom no-slip pad adds mechanical isolation and electrical insulation to further reduce opportunity for noise. The Radial ProD2's warm sound, legendary build quality and compact design have made it the most popular stereo direct box made today.

Features:

• Stereo direct box designed for keyboards

• Smooth, warm sound rounds out digital edge

• Able to handle huge transients without choking

• May be rack mounted for touring rigs

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 dB10 dB12 is for you.

Input: 1 instrument/line/speaker level

Connector: 1/4" jack

Type: Unbalanced, RF filtered

Impedance: 150k Ohm typical

Max Input Level: +20dBu (0dB pad)
+40dBu (20dB pad)
+60dBu (40dB pad)

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

Transformer: Custom dbx mu-metal-shielded

Frequency Response: 20Hz to 20kHz, +/-2.5dB

Noise:

THD:

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.

The Stewart ADB-1 is a single channel active direct box that allows an unbalanced source to
directly feed a balanced input. Musical instruments, tape recorders, VCRs and sound projectors
can be run "direct" to the mixing console, avoiding unnecessary degradation of sound quality.
The ADB-1 operates on either phantom power or a 9-volt battery.

FEATURES:
Flat response
Low distortion
Low noise
Wide dynamic range
No transformer
RF protection on input and output
Switchable ground isolation
Flush mounted slide switches

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
 

Active 4-channel DI box. Each channel has a jack input with a parallel output for passing through the signal. An attenuation switch (-30 dB) allows either a line or loudspeaker signal to be connected.Active 4 x DI box, 19" format. Technical specitications identicl to the PAN-02, however, the PAN-03 is built for mains operation. All connections and switches are located on the front panel, an additional parallel XLR output is located in back. 19 inch rack-mount format, 1 rack space, 90 mm front to back.

The AC 275 is an active, phantom powered direct box. Unlike a passive DI where the frequency response of the signal can be altered depending on the connected impedance, an active DI buffers the input signal with an amplifier. This assures that the sound source will reach the mixer balanced and noise-free.

Housed in a cast alloy chassis, the AC 275 supplies two, high impedance, unbalanced 1/4" jacks and one low impedance balanced XLR jack. It operates with battery or phantom power.

Key Features
?	Active direct box
?	Allows a hi impedance unbalanced source to directly feed a low impedance balanced input
?	Flat frequency response
?	Connects guitar pickups, microphones or electric instruments to a recording or P.A. console without audio quality loss
?	Internal pad for speaker level input
?	Operates with battery or phantom power
?	Ground lift switch eliminates typical ground loop problems
?	Rugged, road-proof cast alloy chassis