DIN-DB | Jensen Transformers

DIN-DB Single channel direct box

The Iso-Max DIN-DB is a single channel direct box designed to drive unbalanced instrument signals distances to 100 meters (300’) or more without high frequency loss or introducing noise into the signal path.

Converts unbalanced instrument signals to balanced

Eliminates hum and buzz caused by ground loops

Ruler flat frequency response from 10 Hz to 100 kHz

Plug and play easy to use, no power required

The design begins with a gray molded assembly made from UL94-VO flame retardant Noryl that snaps into place onto a standard 35 mm DIN rail for easy installation in a NEMA enclosure. Connections to and from the module are made via removable screw-down wire terminals. Plug and play easy to use, this passive interface does not require any power to work. Inside is a single Jensen high performance transformer providing galvanic isolation as it passively lowers the impedance and performs the balancing. A high 140 kΩ input impedance reduces loading, enabling low-output instruments such as a vintage Fender® bass to be connected without losing tone.

Made for the most demanding professionals, the DIN-DB delivers a ruler flat response from 10 Hz to 100 kHz with less than 2° phase shift. With over +21 dB of signal handling capacity, the DIN-DB gracefully handles extreme signals such as those produced by digital pianos while producing a warm Bessel response that is often referred to as ‘vintage’ sounding.

Applications

Passive Direct box with PA

Connect the hi-Z output from your keyboard to the DIN-DB and it will lower the impedance and balance the signal for long cable runs. It also eliminates hum and buzz caused by ground loops.

Laptop DI to PA system

Send the output from your laptop, CD player or DJ mixer to the DIN-DB and it will deliver a balanced mic level output to feed a mic splitter or the mic input of your mixing console without noise or distortion.

DIN-DB in the studio

The high input impedance, exceptional signal handling and broad frequency response make the DIN-DB a great choice for interfacing electric bass or acoustic guitar to the PA or recording system.

Specifications

All levels are input unless noted

PARAMETER	CONDITIONS	MINIMUM	TYPICAL	MAXIMUM
Input impedance, Zi	1 kHz, +4 dBu, test circuit 1	39.4 kΩ	41.5 kΩ	43.6 kΩ
Voltage gain	1 kHz, +4 dBu, test circuit 1	-13.4 dB	-12.9 dB	-12.4 dB
Magnitude response, ref 1 kHz	20 Hz, +4 dBu, test circuit 1	-0.15 dB	-0.04 dB	±0.0 dB
Magnitude response, ref 1 kHz	20 kHz, +4 dBu, test circuit 1	-0.15 dB	-0.03 dB	+0.1 dB
Deviation from linear phase (DLP)	20 Hz to 20 kHz, +4 dBu, test circuit 1		+0.6/-0.1°	±2.0°
Distortion (THD)	1 kHz, +4 dBu, test circuit 1		<0.001%
Distortion (THD)	20 Hz, +4 dBu, test circuit 1		0.015%	0.05%
Maximum 20 Hz input level	1% THD, test circuit 1	+19 dBu	+21 dBu
Common mode rejection ratio (CMRR) 50 Ω balanced source	60 Hz, test circuit 2		120 dB
Common mode rejection ratio (CMRR) 50 Ω balanced source	3 kHz, test circuit 2	70 dB	85 dB
Common mode rejection ratio (CMRR) 600 Ω unbalanced source	60 Hz, test circuit 3		90 dB
Common mode rejection ratio (CMRR) 600 Ω unbalanced source	3 kHz, test circuit 3		55 dB
Output impedance, Zo	1 kHz, test circuit 1		225 Ω
Optimal cable length	input
Optimal cable length	output		1 m (3’)	6 m (20’)
Temperature range	operation or storage	0°C		70°C
Breakdown voltage*	primary to secondary to shield and case, 60 Hz, 1 minute test duration	250 V RMS

Graphs

Phase Distortion (DLP)

Frequency Response

THD vs Level at Low Frequencies

THD vs Frequency at Various Levels

Photo	Price	Model #	Order #	Description
	$45.00	DIN-MRP	400-9000	19 inch Rack Mounting Panel DIN-MRP 3RU Rack Panel Mounting Adaptor	More Info
	$9.99	DIN Rail	400-9001	Standard DIN rail - 35 x 432 mm steel for mounting DIN modules	More Info

DIN-DB Single channel direct box

The Iso-Max DIN-DB is a single channel direct box designed to drive unbalanced instrument signals distances to 100 meters (300’) or more without high frequency loss or introducing noise into the signal path.