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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
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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 | With added functionality and enhanced audio performance, the AR-133 has been
designed to be more affordable for musicians, studios and PA companies.
The unit includes phantom power and battery supplies as standard. Should the
phantom power from the console fail or be accidentally switched off, the AR-133
automatically switches over to the internal 9V battery providing uninterrupted use.
The unit is housed in a rugged aluminium extrusion case, with robust polyurethane
end-cheeks which give the AR-133 a very distinctive look.
Input connectors are both 1/4" jack sockets and an XLR socket, the latter meaning
that the AR-133 can be used to convert unbalanced signals to a balanced output on
XLRs throughout.
The arched case allows cables to run back underneath the unit from the end for neat
cable management.
Input attenuation is 0, -20 or -40dB, making the box suitable for instrument, line or
amplifier levels on inputs. On the output side, a ground-lift switch is provided for quick
solutions to ground-loop problems.
The AR-133 uses an enhanced version of the same audio path as the AR-116, now
regarded by many people as a reference standard. The sound quality is legendary,
particularly on acoustic and bass guitars.
Numerous applications can be satisfied by the AR-133. For example, as well as the
traditional guitar use, the AR-133 can be used with keyboards, DJ consoles, amplifier
outputs, and other electronic sources.An additional bonus is the ability to use the AR-133
as an active balancing device.
Input Section
Input Impedance 1M Ohm (pad at 0dB)
47k Ohm (pad at -20dB)
47k Ohm (pad at -40dB)
Max Input Level +9dBu (pad at 0dB)
+29dBu (pad at -20dB)
+49dBu (pad at -40dB)
Connectors Two Parallel 1/4" jack connectors and a parallel
XLR connector (unbalanced)
Jack: Tip Hot (+ve)
Sleeve Ground
XLR: Pin 2 Hot (+ve)
Pin 1 & 3 Ground
Output Section
Output Transformer Balanced
Max. Output Level +8dBu into 600 Ohms or greater
Connector XLR3-32 or equivalent
System Performance
Distortion (THD) < 0.005% at 1khz, 0dbu output
Noise < -105db unweighted, 22hz-22khz, rms*
Frequency Response 30Hz to 20kHz, +0dB/-1dB
General
Main/Standby battery 9 volt PP3 type, preferably alkaline.
Current drain on phantom - less than 7.5mA
on battery - less than 2mA.
Phantom Power +20 volts DC to +48 volts DC
Weight 650 gms, excluding batteries.
Overall Dimensions 59 mm x 124 mm x 143 mm
(2.3" x 4.9" x 5.6“) | 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. |
2-channel DI box/splitter, active Converts 2 separate unbalanced line inputs (e.g. instruments) into 2 balanced XLR outputs for connecting a mixer Switchable to split mode (input 1 routes the signal to both outputs) Switchable input attenuation: +20 dB, 0 dB, -30 dB Ground-lift switch eliminates ground loop problems 2 signal inputs via XLR connectors 2 low-impedance XLR outputs Microphone phase can be switched Hi cut 8 kHz switchable Modern convex housing design Full rubber housing corners for safe operation Cables can be routed under the housing Operation with 9 V battery |
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