Proel DB1A aktiivinen DI-boksi

Proel DB1A aktiivinen DI-boksi (169,00)
Erittäin laadukas, hyvä-ääninen ja jämääkkä DI-boxi, jossa kikki liittimet ovat
samlla puolella boxia. Teräskotelo ja paksut kumipäädyt, jotka pitävät boxin paikollaan.
Sisääntulo 6,3 plugilla tai XLR-liittimellä. Linkitys ulos 6,3 jakilla. Balansoitu ulostulo (XLR). Kytkimet: maan erotus, PAd -10, -20, -30 dB, vaiheenkääntö ja virtakytkin.Merkkiivalot virralle, signaalille ja yliohjauksen ennakoiva varoitusvalo. Toimii phantomilla, 9 V:n paristolla tai erillisellä muutajalla (9 V DC, lisävaruste).
 
D.I. Boxes (Direct Injection Boxes) are part of the essential set of tools required for any professional live sound situation or any application where the audio devices feature diff erent levels, impedance and connections. Transforming audio signals from unbalanced to balanced, D.I. Boxes reduce the possibility of electrical disturbances on the line - especially over long cable runs such as from a musical instrument to the FoH mixing console. The DB series includes three diff erent models of high-performance D.I. boxes: a single channel active (DB1A), a single channel passive (DB1P) and a dual channel active (DB2A). The circuitry of each model has been designed with the maximum care, using carefully selected electronic components, such as isolation transformers (DB1A, DB1P) and low-distortion ICs. This guarantees a clean, hum-free signal transmission from the instrument to the mixing consoles, even on very long cables, without impedance matching problems. On the front panels, a wide choice of connectors is available (XLR, JACK and RCA, depending on the model), allowing easy connection from a wide range of sources, including keyboards and samplers, guitars and basses, PC audio cards and any type of music player. The ACTIVE versions can be powered by 48 V phantom power from the mixing console, by a 9 V battery or, in large applications using many DI BOXES, by an external 9 V power adapter that can be daisy-chained using the double power connector on the rear panel. The innovative mechanical design of the three models includes an aluminum shell and rubber corners, which provide maximum protection in the toughest situations. When the two rubber corners are removed, two guides are exposed, allowing the coupling of two DI units, which can then be mounted in a 19” standard rack (rack ears included). This unique feature is extremely convenient for engineers who need to use a large number of DI BOXES in the same application.

RACK mountable
MU-METAL core isolation transformer
High dynamic headroom with minimum phase and harmonic distortion
Input JACK and XLR connectors with link possibility
All the connections on the same side
-10 dB, -20 dB, -30 dB PAD
CLIP and SIGNAL LED Phase reverse
Powering options: 9V battery, +48V, external AC/DC adaptor supply

TECHNICAL SPECIFICATIONS

Input Section
Input Impedance	1M Ohm (pad at 0 dB)
	47k Ohm (pad at -20 dB)
	44k Ohm (pad at -30 dB)
Max Input Level	+5 dBu (pad at 0 dB)
	+25 dBu (pad at -20 dB)
	+35 dBu (pad at -30 dB)
Connectors	2 x 1/4" jack + 1 x XLR-F (unbalanced)
Output Section
Output	Transformer Balanced (fully isolated)
Max. Output Level	into 600 Ohms or greater
	+3 dBu (for 0.1% THD at 50 Hz)
	+5 dBu (for 0.1% THD at 1k Hz)
Connector	XLR-M
System Performance
Insertion loss	< 1 dB
CMR	> 60 dB
Phase distortion	+11° at 20 Hz, -6° at 20k Hz
Distortion (THD 20-20k Hz 0dBu)	< 0.007 %
Noise	< -105 dBu unweighted
Frequency Response	10 Hz to 100 kHz, +0dB/-1 dB
General
Controls	On/off, Pad -10, Pad -20, Gnd Lift, Ø inv.
Indicators	On, signal, clip
Phantom Power	+24 volts DC to +48 volts DC
AC/DC adaptor	+12 volts DC
Standalone/Standby	9 volt PP3 type battery
Current consumption	less than 3 mA
Dimensions (WxHxD)	215 x 50 x 125 mm
Weight	1.08 kg (2.38 lb)