Solid State Logic PURE DRIVE QUAD Manual

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PURE DRIVE QUAD
www.solidstatelogic.com
PURE DRIVE QUAD
User Guide
Visit SSL at:
www.solidstatelogic.com
© Solid State Logic
All rights reserved under International and Pan-American Copyright Conventions.
SSL® and Solid State Logic®
are registered trademarks of Solid State Logic.
SuperAnalogue™, VHD™, PureDrive™ and PURE DRIVE QUAD™ trademarks of Solid State Logic.
All other product names and trademarks are the property of their respective owners and are hereby acknowledged.
No part of this publication may be reproduced in any form or by any means, whether mechanical or electronic, without the
written permission of Solid State Logic, Begbroke, OX5 1RU, England.
As research and development is a continual process, Solid State Logic reserves the right to change the features and
specifications described herein without notice or obligation.
Solid State Logic cannot be held responsible for any loss or damage arising directly or indirectly from any error or omission in
this manual.
PLEASE READ ALL INSTRUCTIONS, PAY SPECIAL HEED TO SAFETY WARNINGS.
E&OE
Revision 1.0 - October 2023
Initial Release
Table of Contents
Overview 4
Introduction 4
3 Flavours, 1 Mic Pre 4
Analogue Obsession 4
Extensive Connectivity 4
Features 5
Installation 5
Unpacking 5
Rack Mounting, Heat and Ventilation 5
Safety Notices 5
Hardware Overview 6
Front Panel 6
Rear Panel 6
Connections Overview 7
Tutorial 8
Power On 8
Front Panel Controls 8
Power, Digital Clock Setup & Metering 11
Rear Panel Connections 13
USB Audio Interface 16
Aggregate Soundcard (Mac only) 17
Re-purposing the Digital Outputs as DAW Outputs 18
Firmware Updates 19
Settings 20
Settings Layout - Overview Map 20
Autopower On Enable 22
Auto Standby (Sleep) Mode Enable 22
Auto Standby (Sleep) Timeout 22
Button Brightness 21
Meters Brightness 21
Relay Feedback 21
Re-purposing the Digital Outputs as DAW Outputs 23
Safe Mode for INSERT and Ø Push Functions 24
Peak Hold 24
Meter Release 24
Factory Reset 25
Troubleshooting 26
Specications 28
Block Diagram 32
Safety Notices 33
5
Features
• 4 high performance PureDrive™ mic preamps.
• +48V phantom power, polarity invert and 3rd order hi-pass filter sweepable up to 300 Hz.
• Stepped Gain control up to +65 dB Gain.
• 31-step Trim control, with precise 1 dB increments.
• 3 modes for each preamp – Clean, Classic Drive and Asymmetric Drive.
• Mic/Line Input Switching - Mic via XLR and Line via choice of TRS Jack or dedicated D-Sub connectivity.
• 4 front panel Hi-Z/DI Instrument inputs with automatic input detection.
• 4 mic preamp input impedance options - 12 kΩ, 1.2kΩ, 600Ω and 400Ω.
• Balanced analogue outputs/insert sends for external processing.
• +24 dBu professional line level insert returns/ADC inputs.
• Analogue to digital connectivity via ADAT, AES and USB.
• Ability to switch ADAT and AES connections to source audio from DAW outputs (USB) instead of the A/D converter.
• Cascade 2 PURE DRIVE QUAD units via convenient ADAT LINK IN connection.
• USB audio interface providing 12 in / 12 out @44.1/48 kHz (4 analogue + 8 ADAT inputs (via Link in) / 4 AES + 8 ADAT outputs).
• Stepped pots and digitally controlled analogue electronics for precision, stereo matching and ease of recall.
• Up to 192 kHz and 32-bit conversion, professional I/O levels (+24 dBu = 0 dBFS).
• Selectable Auto-Sleep mode.
• Auto-ranging Wordclock In and Out.
Installation
Unpacking
The unit has been carefully packed and inside the box you will find the following items.
PURE DRIVE QUAD
IEC power cord for your country
Safety Sheet
It is always a good idea to save the original box and packaging, just in case you ever need to send the unit in for service.
Rack Mounting, Heat and Ventilation
PURE DRIVE QUAD is a 2U, 19” rackmount piece of equipment designed to sit in the racking of a producer’s desk or similar. It is
recommended that ventilation space is left above and below the unit so any heat generated by PURE DRIVE QUAD can naturally
disperse. The sides of the unit's chassis have cut-outs that should under no circumstances be blocked or covered. Always allow
the unit to cool down before handling.
Safety Notices
Please read the safety notice information included on the Safety Sheet inside the box before using PURE DRIVE QUAD. This
information is also available in Appendices section of this User Guide.
6
Hardware Overview
This page provides an overview of the PURE DRIVE QUAD hardware. The tutorial section covers each control in more detail.
Front Panel
Rear Panel
4 x HI-Z/DI INSTRUMENT
INPUTS
Connect guitars/bass/
keyboards directly.
HPF (HIGH-PASS FILTER)
3rd order (18 dB per
octave) sweepable HPF for
removing low-end.
CONFIGURATION
+48V Phantom Power, Mic/
Line switching, Impedance
switching and Drive
modes.
INSERT IN/OUT &
POLARITY INDICATORS
Insert return in/out and
polarity invert on/off.
STANDBY and DIGITAL
CLOCK SETUP
Standby on/off and digital
clocking rate and source.
GAIN (COARSE)
11-position stepped control
provides up to +65 dB of
gain.
TRIM (FINE)
31-position stepped control
with +/- 15 dB of gain in
1dB increments.
METERING AND STATUS
14-segment metering,
Sample Rate & Clocking
status.
INSERT RETURNS & LINE INPUTS
D-Sub connector:
1-4: Balanced analogue insert returns/ADC inputs (+24 dBu)
5-8: Dedicated Line Inputs.
ADAT
Optical ADAT OUT and
LINK IN for cascading 2
QUADs.
USB
'C' Type connection
for in-built USB audio
interface.
ANALOGUE INPUTS
Mic-level connections via the XLR
socket. Line-level via the TRS jack
in the centre of the socket.
ANALOGUE OUTPUTS/
INSERT SENDS
Balanced analogue outputs/
insert sends on XLR.
WORDCLOCK
Wordclock OUT and IN
via BNC connectors. 75Ω
wordclock termination .
AES/EBU
OUT
1/2 and 3/4
AES outputs.
AUTO-
RANGING
PSU & Rocker
Switch
7
Connections Overview
1 - MICROPHONES CONNECTED TO MIC/LINE INPUTS
Connect up to four microphones using XLR cables to the rear-panel Combo XLR sockets and choose from four impedance options
to best suit the loading of each microphone. Or connect line-level sources via the jacks in the centre of the sockets.
2 & 3 - AUDIO INTERFACE & EXTERNAL PROCESSING CONNECTED TO OUTPUTS/INSERT SENDS
Record the analogue outputs of PURE DRIVE into line-level inputs of your audio interface. Alternatively, take the analogue outputs
and send them into external processing devices such as outboard compressors.
4 - 2ND PURE DRIVE QUAD UNIT ADAT OUT CONNECTED TO ADAT LINK IN
Connect the ADAT OUT of a second PURE DRIVE QUAD and plug it into the ADAT LINK of your first unit. This gives you a
convenient way of sending up to 8 channels of audio over 1 x ADAT optical cable via the ADAT OUT.
5 - SSL 12 ADAT IN CONNECTED TO ADAT OUT
Connect PURE DRIVE digitally to an audio interface with an ADAT input, such as SSL 12 to record using the on-board A/D converter.
6 - MAC/WINDOWS COMPUTER CONNECTED TO USB
Connect a USB cable to take advantage of PURE DRIVE's built-in audio interface, allowing you to record directly into your DAW
using the on-board A/D converter.
7 - MASTER CLOCKING DEVICE CONNECTED TO WORDLCOCK IN
Use the BNC connectors to hook-up PURE DRIVE as part of your digital clocking system.
8 - AES/EBU DEVICE CONNECTED AES/EBU OUT
Use the AES/EBU outputs to conveniently connect to external devices that accept AES/EBU inputs, such as distribution systems
and external converters.
9 & 10 - EXTERNAL PROCESSING & LINE-LEVEL DEVICES CONNECTED TO INSERTS RETURNS & LINE INPUTS
Return the output from external analogue processors (Insert Returns on connections 1-4). Connect the output of dedicated line-
level devices (Line Inputs on connections 5-8).
8
Tutorial
Power On
Power on the unit by moving the rear panel rocker-switch into the on position. The start-up sequence will run, concluding with the
+48V buttons blinking for a few seconds as the unit returns to its previous state.
Front Panel Controls
QUAD has 4 channels of preamps, with an identical set of controls for each one.
GAIN
11-position stepped control provides +5 to +65 dB of gain for microphone sources (in 6 dB steps) and 0 to +30 dB of gain for Line
sources (in 3 dB steps). In Hi-Z mode, the gain range is +11 dB to + 41 dB in 3 dB steps.
TRIM
31-position stepped control provides ± 15 dB gain in 1 dB increments. This is a separate gain circuit, post the main GAIN.
Top tip - overdrive the signal with the control and then reduce to a suitable level using , so as not to GAIN TRIM
overload equipment downstream of the preamp or the analogue to digital converter.
HPF (High-Pass Filter)
31-position stepped 3rd order / 18 dB per octave high-pass filter control up to 300 Hz. Each step is 10 Hz. Turn fully anti-clockwise
to take the filter of circuit.OUT
GAIN
HIGH PASS
FILTER
MIC/LINE
SELECT
DRIVE [TYPE]
ZΩ
(IMPEDANCE)
TRIM
Ø
POLARITY
FLIP LED
INSERT LED
+48V PHANTOM
POWER
9
INSERT LED
Lights green to indicate the insert return is active. To enable/disable the insert return, push the GAIN control. Inserts are a great way
of incorporating external processing (such as an EQ or compressor) into the signal path ahead of the analogue to digital converter
(ADC). Alternatively, you can use the insert return as a way of bypassing the preamp stage, which can be useful when using signal
from external preamps or whenever straight-forward, pristine analogue-to-digital conversion is needed.
Useful Info: Insert returns are channels 1-4 of the rear panel D-Sub connector.
POLARITY (Ø LED)
Lights green to indicate the polarity is flipped. To enable/disable polarity flip, push the control. When dealing with multi-mic'd TRIM
instruments such as drums, phase cancellations can occur due to the microphones receiving the sound waves at different times.
Flipping the polarity (or phase as is often referred to) on certain channels can help resolve these cancellations.
Top Tip - It is common practice to flip either the top or bottom snare microphone to ensure a 'fatter' sound.
+48V
Lights red when enabled. Provides +48V phantom power, required for certain condenser and active ribbon microphones. Dynamic
or Passive Ribbon microphones do not require phantom power to operate and in some cases can cause damage to the microphone.
If in doubt, make sure is disabled before plugging in any microphone. When engaging/disengaging , the button will blink +48V +48V
for 4 seconds to signify the audio is being temporarily muted in order to avoid any unwanted clicks/pops.
LINE
Lights bright white when active. Activating the button switches the input to line mode, which sources the signal from either LINE
the rear panel TRS jack or the dedicated D-Sub connector. The connectors are hardwired in parallel so it is recommended to only
use one at a time. In mode, and buttons are disabled and the impedance is fixed at LINE +48V ZΩ 22kΩ.
ZΩ
Changing the impedance allows you to correctly load match some vintage microphones, or even change the tonality of the input
signal, giving further creative control when recording. Press the button to cycle through input impedance options. Press and ZΩ
hold to go backwards through the selections.ZΩ
Green = 12kΩ Dim White = 1.2kΩ Amber = 600Ω Red = 400Ω
Generally speaking, for condenser and active microphone altering the microphone impedance will not make a difference to
the sound, in which case leaving the preamps set to factory default (12kΩ) is recommended. For ribbon and dynamic Green
microphones, impedance affects the inherent tone of the individual microphone and therefore can be used as powerful tone
shaping tool, almost like an EQ. This works on the principle of the microphone's output impedance as a function of frequency not
being constant.
• Selecting a high input impedance will give less deviation from the natural response of the microphone, resulting in a more
balanced and natural-sounding frequency response. A general rule of thumb is that the preamp should have an input
impedance of at least ten times the output impedance of the microphone.
• A lower input impedance will give a more accentuated response from the microphone, enhancing the timbre and signature
of each individual mic. Frequencies at which the microphone’s output impedance is higher than average will be attenuated,
while frequencies where the microphone’s output impedance is lower will be boosted.
• Changing from a high input impedance setting to a low input impedance setting will result in a slight drop in level. This is
normal and is a result of the greater ratio between the microphone’s output impedance and the preamp’s input impedance.
10
DRIVE [TYPE]
Toggles between the 3 different microphone preamp modes: Clean, Classic Drive and Asymmetric Drive.
Clean (backlit) - linear, ultra-low noise and distortion preamp capable of impeccably amplifying the sound source with clarity and
detail.
Classic Drive ( ) - introduces harmonic distortion to enrich the input signal, using predominantly odd harmonics; the same amber
drive sound found on the ORIGIN console. The harmonic distortion is level/gain dependent.
Asymmetric Drive ( ) - an alternative to Classic Drive mode, where the even harmonic content becomes dominant than the odd green
harmonics. Results in a more pronounced thickness and softening of transients. The harmonic distortion is level/gain dependent.
To engage Asymmetric drive mode press and hold the button for a second or so.DRIVE
Top Tip - The button flashes red to indicate you are clipping the main preamp or the trim DRIVE
stage. Lower the (or ) to correct.GAIN TRIM
Classic Drive vs Asymmetric Drive
The graph below shows the difference between the harmonics generated by Classic Drive Asymmetric Drive vs at a nominal 29
dB of gain.
• The harmonics are from the setting, whereas the harmonics are from the blue Classic Drive Red Asymmetric Drive mode.
• Note that the 2nd harmonic is much more prominent in Asymmetric Drive.
Test tone 200 Hz, 29 dB Gain, input level -14.35 dBu.
Prominent odd
harmonic
(Classic Drive)
Prominent even
harmonic
(Asymmetric Drive)
11
Hi-Z/DI - Instrument Inputs
Each of the input channels feature a 1MΩ Hi-Z/DI unbalanced Instrument input for connecting sources such
as guitars and keyboards.
These inputs have automatic detection meaning that plugging a jack into the socket will automatically cause the
Hi-Z/DI Input to be the selected source (instead of Mic or Line). The and buttons are disabled +48V LINE, ZΩ
but you can of course still use the modes to colour the signal (or not) as you please.DRIVE
Power, Digital Clock Setup & Metering
Metering
14-segment LED metering displays the signal level in dBu at the analogue to digital converter stage. The peak hold segment
and the release ballistics can be adjusted to suit your preference. Please refer to the Settings section of this user guide for more
information.
STANDBY MODE
METERING
SAMPLE RATE
STATUS
CLOCK SOURCE
12
STANDBY MODE (SLEEP)
STANDBY MODE provides a convenient way of putting the unit to sleep from the front panel. To enter this
mode, press and hold the button for a second. All front panel buttons and LEDs will turn off, with the exception
of the STANDBY MODE STANDBY MODE button itself, which will slowly pulse. puts the unit into a low power
state, shutting down the audio circuitry until the unit is woken from sleep. Simply press the button again to
wake the unit from sleep. STANDBY MODE can also be configured to come on automatically after a specified
amount of time of inactivity. Please refer to the Settings section of the user guide for more information.
RATE
Press the button to change the sample rate of the built-in analogue to digital converter.RATE
Press and hold the button to go backwards through the sample rate options.RATE
The current sample rate is indicated by the lighting of the and (kHz), in conjunction with and 44.1 48 x2 x4
markings in the status area.
FRONT PANEL INDICATION SAMPLE RATE (kHz)
44.1 44.1
48 48
44.1 + x2 88.2
48 + x2 96
44.1 + x4 176.4
48 + x4 192
CLOCK
Press the button to change the clock source - choose from (internal), (wordclock) or .CLK INT W/C ADAT
Press and hold the button to go backwards through the clock source optionsCLK
The current clock source is indicated by the lighting of the , and markings in the status area.INT W/C ADAT
When clocking from either wordclock or ADAT input, the front panel sample rate indication will flash to inform you
the source is not present or at a usable rate.
USB
Illuminates solid green to indicate that the unit is successfully connected to the host computer via the USB. Please note that
when the unit is connected via USB, the front panel and buttons become inactive. Use your host computer to make RATE CLK
adjustments to the Sample Rate and Clock Source. For more information on the built-in USB audio interface, refer to the USB audio
interface section of this user guide.

Produkt Specifikationer

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Model: PURE DRIVE QUAD

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