ART DTI
MRP - Rs. 7,272
ART DTI dual transformer / isolator: two 1:1 transformers against hum and ground loops, XLR, 1/4 inch TRS and RCA on all inputs and outputs, passive. Available in India from Shivansh Electronics, Kolkata, West Bengal, India.
VISUAL GUIDE — See Every Photo, Spec & Setup Step (PDF)
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Specifications
| Active or passive | Passive |
| Inputs | 2 x balanced XLR (female); 2 x balanced / unbalanced 1/4 inch TRS; 2 x RCA |
| Outputs | 2 x balanced XLR (male); 2 x balanced / unbalanced 1/4 inch TRS; 2 x RCA |
| Frequency response | 10 Hz - 50 kHz (±0.5 dB at +4 dBu) |
| Total harmonic distortion | 0.01 % (typical at 1 kHz, +18 dBu); < 0.05 % at 100 Hz, +24 dBu |
| Insertion loss | 0.4 dB (100 kΩ load); 5.5 dB (600 Ω load) |
| Transformers | 1:1 unity gain; for impedances from 600 Ω to 100 kΩ |
| Power requirements | None (passive) |
Physical
| Dimensions (H x W x D) | 44.5 x 107 x 89 mm (1.75 x 4.2 x 3.5 inch) |
| Weight | 340 g (0.75 lb) |
| Case | Rugged aluminium |
Product overview
The ART DTI Dual Transformer / Isolator uses a pair of high-performance transformers to reduce hum and ground loop noise, separating the input and output signal grounds for total isolation between two systems.
The transformers are wound for 1:1 unity gain, are designed for impedances from 600 Ω to 100 kΩ and have an extremely flat and wide frequency response; even at high signal levels they give clean, transparent sound. With XLR, 1/4 inch TRS and RCA connectors on all inputs and outputs, the DTI is flexible and easy to integrate as a clean patch point in virtually any audio system. A rugged aluminium enclosure and a passive design that needs no external power make it built for years of reliable use.
| 1:1 transformers, unity gain | 2 channels |
| On every input and output | XLR, TRS, RCA |
| ±0.5 dB at +4 dBu | 10 Hz - 50 kHz |
| No power required | Passive |
Key features
- 2 x XLR inputs and outputs
- 2 x 1/4 inch TRS inputs and outputs, balanced or unbalanced
- 2 x RCA inputs and outputs
- 10 Hz - 50 kHz frequency response
- 0.01 % THD (typical at 1 kHz, +18 dBu)
- Passive design: no power required
Inputs on the front, outputs on the rear
The front panel carries inputs 1 and 2 on XLR (female), 1/4 inch TRS and RCA; the rear panel carries outputs 1 and 2 on RCA, 1/4 inch TRS and XLR (male), plus an external ground lug.
Ground isolation
The two transformers totally separate the input and output signal grounds. Only the 1/4 inch sleeve and XLR pin 1 of channel one connect to chassis ground; all other inputs and outputs are ground isolated. When only the RCA jacks are used, ART says to use the external ground lug for chassis ground.
In the box
- DTI dual transformer / isolator
ART DTI: frequently asked questions
Does the DTI need power?
No. It is fully passive.
Which connectors does it have?
XLR, 1/4 inch TRS and RCA on both inputs and outputs, for two channels.
Does it change the signal level?
The transformers are wound for 1:1 unity gain. Insertion loss is 0.4 dB into 100 kΩ and 5.5 dB into 600 Ω.
Where can I buy the ART DTI in India?
The ART DTI is available from Shivansh Electronics, Kolkata, West Bengal, India, with delivery across India.
Workflow 1: Removing hum between two systems
Live and installed sound with ground loops.
Connections
| Connect | To |
|---|---|
| Source system outputs | DTI inputs |
| DTI outputs | Destination system inputs |
Setup
- Insert the DTI between the two systems.
- Use the connector types each side needs.
Tip: The transformers separate the input and output signal grounds.
Workflow 2: RCA source into balanced XLR inputs
Venues connecting consumer gear to pro inputs.
Connections
| Connect | To |
|---|---|
| RCA source | DTI RCA inputs |
| DTI XLR outputs | Mixer XLR inputs |
Setup
- Connect the RCA source to the front RCA inputs.
- Take the rear XLR outputs to the mixer.
Tip: When using only RCA jacks, use the external ground lug for chassis ground.
Workflow 3: Computer audio to a PA
Presentations and events playing from a computer.
Connections
| Connect | To |
|---|---|
| Computer line out | DTI 1/4 inch or RCA inputs |
| DTI XLR outputs | PA inputs |
Setup
- Connect the computer's outputs to the DTI.
- Feed the PA from the XLR outputs.
Tip: Isolation between the two systems reduces ground loop noise.
Workflow 4: Stereo feed to a recorder
Studios and AV taking a stereo feed.
Connections
| Connect | To |
|---|---|
| Mixer outputs L / R | DTI inputs 1 / 2 |
| DTI outputs 1 / 2 | Recorder inputs |
Setup
- Use channel 1 for left and channel 2 for right.
- Pick the connectors that match the recorder.
Tip: 1:1 unity gain keeps the levels unchanged apart from the insertion loss.
Workflow 5: Isolating amplifier inputs
Systems with several power amplifiers.
Connections
| Connect | To |
|---|---|
| Signal line | DTI input |
| DTI output | Amplifier input |
Setup
- Place the DTI in the amplifier's input line.
- Repeat on the second channel for another line.
Tip: Two channels in one compact box.
Workflow 6: Clean patch point between system types
Integrators connecting different equipment.
Connections
| Connect | To |
|---|---|
| XLR, TRS or RCA source | DTI input |
| DTI output | XLR, TRS or RCA destination |
Setup
- Choose any input connector type.
- Choose any output connector type.
Tip: XLR, 1/4 inch and RCA on every input and output.
