Contacta V7, V15, V15A User Manual

V7 / V15 / V15a

Hearing Loop Drivers

Installation &

User Guide

November 2019

1

Contents

Product Overview
Components
Connections
Suitable Cable Lengths
Start-Up Tests
Controls
Hearing Loop Setup
Troubleshooting

Technical Specications

Standards

3
4-5
6-7
8-10
12
13-21
22-27
28
29-31
32

Contacta has a policy of continuous product development, therefore small specication changes

may not be reected in this manual. Images, labels, packaging, accessories and product colours

are subject to change without notice.

2

Product Overview

Our highly eicient and compact V7, V15 and V15a hearing loop drivers
are suitable for smaller facilities and venues.

The V7 and V15 are constant current hearing loop drivers which power

hearing loops utilising a single output. The V15a is a constant current

dual output hearing loop driver with integral phase shifter for phased

array conguration.

These hearing loop drivers have Class-D amplier output stages and
an audio subsystem built around an advanced DSP core. Combined
with a powerful CPU that ensures peak performance, they use cutting
edge technology proven in the pro audio world to achieve life-like
speech and rst-class music reproduction.

Note: For large area hearing loop installation instructions, consult the

Large Area Hearing Loop Installation Guide.

3

V7

Components

3

2

1

5

6

4

1. Rubber Feet x4

2. 5.08mm Euro-Block Connector

3. 3.81mm Euro-Block Connector x2

4. Signage

V15

3

2

1

4

1. Rubber Feet x4

2. 5.08mm Euro-Block Connector

3. 3.81mm Euro-Block Connector x2

4. Signage

5

6

7

5. V7 Hearing Loop Driver

6. Installation & User Guide

7. Power Supply [PS-55]

8. IEC Power Lead

7

5. V15 Hearing Loop Driver

6. Installation & User Guide

7. Power Supply [PS-60]

8. IEC Power Lead

8

*

8

*

*

Plug type varies by country.

4

V15a

3

2

1

5

6

4

1. Rubber Feet x4

2. 5.08mm Euro-Block Connector x2

3. 3.81mm Euro-Block Connector x2

4. Signage

7

8

5. V15a Hearing Loop Driver

6. Installation & User Guide

7. Power Supply [PS-60]

8. IEC Power Lead

*

*

Plug type varies by country.

Cable & Equipment: A length of loop cable determined by the loop

design is also required. Hearing loop drivers also require ancillary
equipment for audio feeds, such as a microphone or sound system.

5

Connections

Rear Panel Connections

1 2

1. Microphone Input - 3.81mm Euro-block balanced microphone
input (12V phantom power via 680Ω).

2. Line Input 1* - 3.81mm Euro-block balanced line input/feedthrough.

3. Line Input 2* - XLR balanced line input/feedthrough.

4. Power Supply Input - *V7 DC Power Input, 2.1mm 14Vdc 2.14A

***V15 DC Power Input, 2.1mm 24Vdc 4.17A
**V15a DC Power Input, 2.1mm 24Vdc 4.17A
Caution: Use only the provided Power Supply.

5. Loop A Output - 5.08mm Euro-block.

6. Loop B Output - 5.08mm Euro-block [V15a only].

*

Note: Only connect to one Line Input at a time.

3

4

5

6

6

Connection Examples

XLR to XLR (line)

TRS to XLR (line)

Unbalanced to XLR

XLR to Euroblock (balanced)

Unbalanced to Euroblock

7

Suitable Cable Lengths

The tables in this section show the approximate maximum cable
lengths for diering maximum required currents.

Loop impedance (at 1.6kHz) should be less than the voltage capability
of the driver (V7: 7.5Vrms, V15: 15Vrms, V15a: 15Vrms) divided by the
required current.

This achieves 400mA/m eld strength at 1kHz.

V7 Single-Turn Hearing Loop (Metric)

Current 2.0A 3.0A 4.0A 5.0A

Cable Type Cable Length

Maximum

Cable
Length

Round

Cable
(CSA)

Flat Cable
(Width)

0.5mm 85m 56m 42m 34m

1mm 133m 89m 66m 53m

1.5mm 155m 103m 77m 62m

2.5mm 173m 115m 86m 69m

10mm 101m 67m 50m 40m

12.5mm 192m 128m 96m 77m

25mm 255m 170m 127m 102m

V7 Single-Turn Hearing Loop (Imperial)

Current 2.0A 3.0A 4.0A 5.0A

Cable Type Cable Length

Maximum

Cable
Length

Round

Cable
(AWG)

Flat Cable
(Width)

18AWG 438ft 292ft 219ft 175ft

14AWG 593ft 395ft 296ft 237ft

18AWG
(equivalent)

14AWG
(equivalent)

505ft 336ft 252ft 202ft

711ft 474ft 355ft 284ft

8

V15 Single-Turn Hearing Loop (Metric)

Current 2.0A 3.0A 4.0A 5.0A

Cable Type Cable Length

Maximum

Cable
Length

Round

Cable
(CSA)

Flat Cable
(Width)

1mm 242m 161m 121m 97m

1.5mm 284m 189m 142m 114m

2.5mm 319m 213m 160m 128m

10mm 180m 120m 90m 72m

12.5mm 340m 226m 170m 136m

25mm 450m 300m 225m 180m

V15 Single-Turn Hearing Loop (Imperial)

Current 2.0A 3.0A 4.0A 5.0A

Cable Type Cable Length

Maximum

Cable
Length

Round

Cable
(AWG)

Flat Cable
(Width)

18AWG 746ft 498ft 373ft 299ft

14AWG 997ft 664ft 498ft 399ft

18AWG
(equivalent)

14AWG
(equivalent)

840ft 560ft 420ft 336ft

1327ft 885ft 663ft 531ft

9

V15a Single-Turn Hearing Loop (Metric)

Current 2.0A 3.0A 4.0A 5.0A

Cable Type Cable Length

Maximum

Cable
Length

Round

Cable
(CSA)

Flat Cable
(Width)

1mm 266m 177m 133m 106m

1.5mm 311m 208m 156m 125m

2.5mm 350m 233m 175m 140m

10mm 197m 131m 99m 79m

12.5mm 373m 249m 186m 149m

25mm 493m 329m 247m 197m

V15a Double-Turn Hearing Loop (Metric)

Current 2.0A 3.0A 4.0A 5.0A

Cable Type Cable Length

Maximum

Cable
Length

Round

Cable
(CSA)

Flat Cable
(Width)

1mm 193m 129m 97m 77m

1.5mm 209m 139m 104m 83m

2.5mm 219m 146m 110m 88m

10mm 172m 115m 86m 69m

12.5mm 267m 178m 133m 107m

25mm 316m 211m 158m 126m

10

V15a Single-Turn Hearing Loop (Imperial)

Current 2.0A 3.0A 4.0A 5.0A

Cable Type Cable Length

Maximum

Cable
Length

Round

Cable
(AWG)

Flat Cable
(Width)

18AWG 819ft 546ft 409ft 328ft

14AWG 1093ft 729ft 547ft 437ft

18AWG
(equivalent)

14AWG
(equivalent)

921ft 614ft 461ft 369ft

1456ft 971ft 728ft 582ft

V15a Double-Turn Hearing Loop (Imperial)

Current 2.0A 3.0A 4.0A 5.0A

Cable Type Cable Length

Maximum

Cable
Length

Round

Cable
(AWG)

Flat Cable
(Width)

18AWG 598ft 399ft 299ft 239ft

14AWG 684ft 456ft 342ft 273ft

18AWG
(equivalent)

14AWG
(equivalent)

723ft 482ft 362ft 289ft

949ft 633ft 475ft 380ft

11