Block diagram – Manley The WAVE DAC/Preamp 24/96 Version Serial Code WAVE016-present 2002 - present User Manual

Page 19

This is a rough block diagram of the WAVE with a little liberty taken for the sake of clarity.

The INPUT selection is done by a bunch of discrete relays. The careful board layout and
minimisation of close proximity wiring yields lower crosstalk figures over a conventional
rotary switch arrangement, for example. Also this switching buss is fully balanced so both
halves of the signal are switched.

The INSERT block shows the operational amplifiers needed to convert balanced signals to
unblanaced ones when the insert send and returns use unbalanced RCA connectors. The
balanced option eliminates those opamps because the buss is balanced and additional
buffering is not expressly needed for short balanced cable runs.

The circles represent input and output jacks and don't detail if they are balanced and
unbalanced lines. The Mute Switch shorts the output to ground in order to kill the signal.
Outputs 2 & 3 also short to ground for silence when they are off.

The 4 deck motorized volume pot is shown on the Analog Block above but in real life it
lives on its own little board behind the big knob along with the motor driver.

Except for the main cable between the Power Supply and the Analog Board, no attempt
was made to show power supply lines, however the location of some of the important
regulators is shown. There are three more 5V regs and two 15v regs on the DAC board
which are fed pre-regulated from the power supply.

FUSE PWR

STANDBY

BLOCK DIAGRAM

RLY

-18

+18

POWER SUPPLY

FILTER

ALIAS

ANTI-

PASSIVE

FILTER

ALIAS

ANTI-

PASSIVE

CONVERTER

REGULATORS

DAC 5V

DAC 15V

ANALOG BOARD

LEDS & RELAYS

WARM-UP

TUBE 12V

TUBE 300V

STANDBY

LOGIC

REMOTE

TRANSMIT

ADDRESS DIP

FRONT PANEL BOARD

RELAY DRIVE

LEDS

LOGIC

RECEIVER

ADDRESS DIP

PANEL BUTTONS

INSERT

ANALOG BOARD

MUTE

INSERT

LINE AMP

VACUUM TUBE

LINE AMP

VACUUM TUBE

OUT 1

OUT 2

OUT 3

OUT 2

OUT 1

OUTPUT

DIGITAL

DIGITAL BOARD

RATE LEDS

SAMPLE

PHASE

SRC

DECODING

TOSLINK

S/PDIF

AES/EBU

Dig. Filter

PHASE