Ensemble Designs 6600 User Manual

This data pack provides detailed installation, configuration and operation information for
the 6600 Frame, 6601 and 6601R Analog Audio Distribution Amplifiers as part of
the Avenue Signal Integration System.

The module information in this data pack is organized into the following sections:

• Important Safety Instructions

• 6600 Overview

• 6600 Frame
°

Frame Description

°

Power Supplies

°

Frame Installation

• 6601 Analog Audio Distribution Amplifier

• 6601R Analog Audio Distribution Amplifier

• Warranty and Factory Service

• Specifications

• Additional Warnings and Cautions

6600-1

Model 6600 Frame

6601 and 6601R

Analog Audio DAs

Data Pack

Revision 2.0 SW v1.0.0

ENSEMBLE

DESIGNS

IMPORTANT SAFETY INSTRUCTIONS

Read these instructions.

Keep these instructions.

Heed all warnings.

Follow all instructions.

Do not use this equipment near water.

Clean only with dry cloth.

Do no block any ventilation openings. Install in accordance with the equipment
instructions.

Do not install near any heat sources such as radiators, stoves or other apparatus that
produce heat.

Do not defeat the safety purpose of the grounding-type plug. A grounding-type plug has
two blades and third grounding prong. If the provided plug does not fit into your outlet,
consult an electrician for replacement of the obsolete outlet.

Protect the power cord from being walked on or pinched, particularly at plugs, convenience
receptacles and the point where they exit from the apparatus.

Only use attachments and accessories specified by Ensemble Designs.

Unplug this equipment when not used for long periods of time.

Refer all servicing to qualified service personnel. Servicing is required
when the equipment has been damaged in any way, such when a power­supply cord is damaged, liquid has been spilled or subjects have fallen
into the equipment, the equipment has been exposed to rain or moisture,
does not operate normally, or has been dropped.

Risk of electric shock. Qualified service personnel should only access
power supply after frame has been unplugged from power.

If the equipment is installed in a moveable cart, use caution when
moving the equipment to avoid injury from tip-over.

Model 6600 Analog Audio DAs and Frame

6600-2

6600 OVERVIEW

The 6600 series of analog audio modules provide high performance analog distribution in
a 2 RU frame with a standard and an optional redundant power supply. The 6600 frame is
dedicated to audio distribution and pluggable terminal strips are standard on every frame.
There is no need for rear modules or special adaptors. Power supplies can be removed
from the front of the frame.

Two analog audio distribution modules are available: the 6601 Analog Audio Distribution
Amplifier (DA) and the 6601R Analog audio DA (with remote gain control).

The 6601 Analog Audio DA module is a high performance audio distribution amplifier for
the broadcast and recording industry. Exceptional performance features include excellent
response, noise and distortion specifications.

The 6601R Analog Audio DA module has all the capability of the 6601 plus selectable
remote gain control. The amplifier offers a ± 20 dB remotely controlled audio gain, which
is selectable to either remote or local.

Both DA modules can be configured as mono or stereo, the 6600 with 8 balanced outputs
(mono) or 4 balanced outputs per channel (stereo) and the 6601R with 6 balanced outputs
(mono) or 3 balanced outputs per channel (stereo). The mode is selected with a jumper on
each module.

Up to twelve 6601 or 6601R audio amplifiers can be mounted in the 2 RU Avenue 6600
frame in any combination. The front and rear views of the 6600 frame with removable
vented cover is shown in the figure below.

Model 6600 Analog Audio DAs and Frame

6600 Analog Audio 2 RU Avenue Frame

6600-3

6600 FRAME

Frame Description

The Avenue 6600 2 RU rack mountable audio frame is capable of housing up to twelve
6601/6601R analog audio distribution modules. Input and output signal connections and
remote gain controls are provided with removable clamp-type barrier connectors.

Power Supplies

The frame provides mounting space for up to two PS66 power supplies for providing DC
power to the frame. The supply is auto-sensing and will operate from any input voltage in
the range 90 to 260 VAC with a frequency of 50 or 60 Hz. The supply provides ± 21V @ 40
Watts. If the power required by the frame exceeds 30 Watts, it is recommended that two
supplies be used to improve heat dissipation and reliability.

Two supplies powered from separate AC sources are always recommended to maximize
reliability. The actual power drawn from the AC supply will depend on how many ampli­fiers and of what type are in the frame. It may be necessary to use dual supplies if the
frame is fully loaded with higher current options (see each amplifier section of this
manual).

A 3-pin Molex connector is provided on the rear of the frame. It is connected to the plus
and minus output DC rails of the power supply and can be wired to another 6600 frame.
This will provide power redundancy for the second frame without the need to purchase a
redundant supply for that frame.

Frame Installation

The Avenue 6600 frame requires 2 RU of space (3.5 in.) and is intended to be mounted in
a standard 19 in. rack. The horizontal depth required in the rack is 12.5 in. and additional
space behind the frame should be planned for audio wiring. No special cooling require­ments are necessary, but it is desirable to avoid mounting the frame adjacent to high­speed digital units to avoid possible noise problems.

The frame input and output connections are similar for the 6601/6601R audio modules.
The typical installation consists of groups of three-pin terminal blocks as illustrated in the
frame rear view below. Refer also to the appropriate amplifier section of this manual for
the actual frame inter-connections.

Model 6600 Analog Audio DAs and Frame

6600-4

A 12 B A 11 B A 10 B A 9 B

A 8 B A 7 B A 6 B A 5 B A 4 B A 3 B

A 2 B A 1 B

PS–1

PS–2

+ 21V

– 21V

Frame Rear View – 3-pin Terminal Wiring

Model 6600 Analog Audio DAs and Frame

6600-5

6601 ANALOG AUDIO DA

Description

The 6601 Analog Audio Distribution Amplifier (DA) is a modular, high performance audio
distribution amplifier intended for studio quality audio distribution systems. It is
designed to be operated from the 6600 audio mounting frame.

The module can be configured as a 1 input by 8 output monaural, or as two, 1 input by 4
output stereo amplifiers, just by moving one internal jumper. In the MONO mode only the
Channel A input connectors are used.; the Channel B input is left unconnected.

All inputs can be connected balanced or unbalanced. Outputs are always balanced. Both
preset and variable gain controls are available which will provide a gain range of – 6 to
+ 33 dB.

Each module has its own on-board voltage regulators with fuse protection. Any failure of a
single module will not effect any other.

Installation

The 6600 audio distribution amplifier is designed to be mounted in the 6600 audio
mounting frame, (up to twelve modules can be installed). There are no special cooling
requirements, although care should be taken to ensure that extremely hot equipment is
not installed directly beneath the frame.

It is recommended that when redundant power supplies are included in the frame, the
two power cords be connected to different AC supplies. In this way the frame will continue
to operate even if there is a partial failure of plant power.

Before installing the module in the frame, it is necessary to set three internal jumpers to
the desired mode. Jumper H2 selects either MONO or STEREO mode, and jumpers H1
and H3 set the desired gain of each channel. Jumpers and gain controls are illustrated in
the figure below.

+27 dB

+18 dB

+9 dB

0 dB

+27 dB

+18 dB

+9 dB

0 dB

H1

RV3

RV1

RV2

RV4

MONO
STEREO

H3

H2

CH A GAIN CH B GAIN

CH B BALANCE

CH A BALANCE

6601 Component Side View