Solid State Logic Stereo System XR622 User Manual

Solid State Logic  
| |  
S O U N D  
V I S I O N  
SUPERANALOGUE  
X - R A C K  
Super-Analogue™ Outboard  
XR622 X-Rack Master Module User’s Guide  
This documentation package contains the User’s Guide for your new X-Rack Master  
module. Depending on the age of your X-Rack, these pages may already be present in  
your X-Rack Owner’s Manual – please check to see if these pages match your Manual.  
If they do not, these pages should be filed alongside it.  
Please Note. The XR622 X-Rack Master module operates in conjunction with the XR625 X-Rack Mic Amp  
and XR623 X-Rack Line Return modules.  
X-Rack units prior to serial number XRK0110 are compatible with the X-Rack Master module  
but may require a small modification to the buscard; if the ‘SOLO’ LED is permanently  
illuminated, resistors R1 and R2 will need removing. In addition, any Mic Amp or Line Return  
module(s) must be fitted immediately to the left of the Master module – later X-Rack units do  
not have this limitation and modules may be freely placed anywhere in the later X-Rack units.  
For correct operation of this module, your X-Rack unit must be running V1.2/0 or later  
software. Please refer to your X-Rack Owners Manual for instructions on how to check the  
current software version and how to obtain and install a newer version if required.  
There may be a newer version of the X-Rack Owner’s Manual available for download from our  
82S6XR0F0B  
 
X-Rack Master Module  
F. Master Module  
F.1 Introduction  
Used in conjunction with the XR623 X-Rack Line Return module, the XR622 X-Rack Master module  
provides a complete small scale mix and monitor system for studios seeking a compact solution for mixing  
and monitoring in the analogue domain. A single X-Rack can provide up to 28 line level inputs. Additional  
racks can be connected via the ‘MIX BUS LINK’ connector on the rear of the X-Rack unit, allowing  
additional inputs to be added to the system if required.  
X-Rack units prior to serial number XRK0110 are not equipped with a ‘MIX BUS LINK’ connector.  
The X-Rack Total Recall system allows session setups to be recalled instantly and can be archived as a  
MIDI SysEx dump to any MIDI sequencer. The monitor section controls can also be controlled remotely  
using MIDI controller commands from any MIDI controller. Up to three racks can be connected to an  
AWS 900 or AWS 900+ and integrated with the AWS 900 Total Recall system via the serial port. Connecting  
the MIX and REC outputs of the XR622 to the MIX and REC Insert Returns of the AWS 900 and selecting  
INSERT SUM mode allows almost unlimited expansion of the number of line level inputs to the console.  
F.2 Connection  
The rear panel of the module carries a pair of 25-way ‘D’ connectors. The left-hand  
connector provides the main and alternate Monitor outputs as well as a stereo External  
Input and the Mix Bus Insert Return. The right-hand connector provides Mix and  
Record Bus outputs along with the Mix Bus Insert Send and a Follow-Monitor (pre-  
level control) output.  
INS RTN INS SND  
EXT  
MON  
MIX  
REC  
ALT MON FOL MON  
All outputs (apart from the headphone output) operate at a nominal level of +4dBu  
and are configured to drive standard line level inputs. Level compensation for feeding  
600Ω inputs from the Bus, Insert and Monitor outputs is provided by removable  
jumpers – refer to Section F.3.4 for details.  
XR622  
SEL  
0
3
6
9
12  
15  
18  
24  
30  
36  
42  
48  
F.3 Operation  
As well as a compact stereo monitor section, the X-Rack Master module contains the  
MONITOR  
MIX  
mix amps and outputs for the X-Rack’s internal Mix, Record and Solo/AFL busses.  
The Mix bus is intended to be used as the main mix bus and includes a balanced  
insert point immediately before the Mix level control. The Record bus provides a  
direct path to a DAW (or any other recorder), allowing the Mix bus to be used to  
provide a monitor mix while recording one or more inputs via the Record bus.  
SUM  
REC  
1
MON  
INS  
MIX LEVEL  
INS  
SUM  
MONITOR  
MIX  
If the X-Rack is fitted with XR621 Mic Amp modules these can be routed directly to  
the Record bus using the ‘REC L’ and ‘REC R’ switches on the XR621 module.  
SOLO  
AFL  
REC  
EXT  
1
F.3.1 Mix Section  
This section carries all of the Mix bus controls; the ‘MIX LEVEL’ control allows the  
LEVEL  
overall gain of the Mix bus to be adjusted (the Record bus level is fixed).  
ALT  
MONO  
DIM  
CUT  
The ‘INS’ switch brings the Mix Bus Insert Return into circuit (the Insert Send is  
permanently active) whilst the ‘SUM REC’ and ‘INS SUM’ switches allow the  
Record bus and Insert Return to be summed with the Mix bus to allow for summing  
of additional mix sources.  
The ‘MON’ switch enables the Mix output to be replaced with whichever source(s)  
have been selected for the Monitor section.  
Page F-1  
 
X-Rack Owner’s Manual  
2
F.3.2 Monitor Section  
XR622  
The Monitor Section enables the Mix and Record busses or a stereo external input to  
be monitored, the source to monitor being set by either the ‘MIX’, ‘REC’ or ‘EXT’  
switches either separately or together, allowing great flexibility in recording and  
monitoring signals. The ‘EXT’ input would normally be playback from the main  
recorder or DAW. The selected monitor signals can be routed back to the Mix output  
using the MON switch in the Mix Section, allowing composite mixes to be easily  
recorded back to the master recorder or DAW ADC.  
SEL  
0
3
6
9
12  
15  
18  
24  
30  
36  
42  
48  
3
MONITOR  
MIX  
SUM  
REC  
If one of the ‘SOLO’ switches on any other X-Rack modules is active, the ‘SOLO’  
LED will illuminate and the AFL bus will be switched to the monitor output in place  
of the selected signal. The level of the AFL signal can be adjusted with the ‘AFL’  
control.  
MON  
INS  
MIX LEVEL  
INS  
SUM  
The overall monitor level is set by the ‘LEVEL’ control and the ‘MONO’ switch  
allows quick mono compatibility checking. The ‘DIM’ and ‘CUT’ switches provide  
either partial (between –3 and –30dB) or full attenuation of the monitored signal as  
required.  
MONITOR  
MIX  
SOLO  
AFL  
REC  
EXT  
Metering of the selected source (or sources) is provided by the stereo bargraph  
LEVEL  
2
3
meter  
which measures the signal level immediately prior to the ‘LEVEL’ control.  
ALT  
MONO  
DIM  
CUT  
Two sets of stereo loudspeaker outputs plus a headphone amplifier are provided.  
The headphone socket is driven by a fixed gain amplifier immediately post the  
‘LEVEL’ control and is un-affected by the loudspeaker ‘ALT’ switch.  
F.3.3 Expansion  
Each of the three X-Rack busses (Mix, Record and Solo/AFL) are accessible  
externally through the ‘MIX BUS LINK’ connector on the rear of the X-Rack.  
Additional X-Racks can be connected via this connector, allowing additional inputs  
to be mixed together and feed a single Master module. The pinout for this connector  
is detailed in Section 5.2 of the X-Rack Owner’s Manual; if the connector listing is  
not present in your manual, a more recent copy may be downloaded from the Solid State Logic website  
Only one XR622 master module is required per system – connecting two or more X-Rack units fitted with  
XR622 modules together will cause serious gain errors and distortion (though it will not damage the system  
electronics).  
Page F-2  
 
X-Rack Master Module  
F.4 Configuration  
F.4.1 Dim Level  
The attenuation applied to the monitor signal when the ‘DIM’ switch is active is set by the Total Recall  
processor. The default level is –15dB, it can be adjusted as follows:  
• Press and hold SETUP/MIDI until the SETUP/MIDI LED flashes.  
• Use the D-Pot to select ‘d1’ (DIM Level). Press the D-Pot to select this option.  
• Use the D-Pot to set the required level (between –3dB and –30dB).  
• Press the D-Pot once more to set the selected value and return to the setup menu or press and hold  
SETUP/MIDI until the SETUP/MIDI LED stops flashing to return to normal operation.  
F.4.2 MIDI Remote Control  
Controlling the ‘soft’ controls (see next page for list) on the XR622 Master module via MIDI requires MIDI  
remote mode to be enabled. Optionally the X-Rack can be configured to use one or all (default) MIDI  
channels and to map different MIDI controllers to any of the soft controls.  
F.4.3 Selecting MIDI remote mode  
To select MIDI remote mode:  
• Press and hold SETUP/MIDI until the SETUP/MIDI LED flashes.  
• Use the D-Pot to select ‘re’ (Remote Mode). Press the D-Pot to select this option.  
• Use the D-Pot to select ‘m1’. The X-Rack monitor controls listed below will now respond to MIDI  
controller messages.  
• Press the D-Pot once more to set the selected value and return to the setup menu or press and hold  
SETUP/MIDI until the SETUP/MIDI LED stops flashing to return to normal operation.  
Once MIDI remote mode is selected the unit will behave as normal until a MIDI controller message  
corresponding to one of the soft controls is received. This will lock out all of the ‘soft’ front panel controls,  
retaining the current settings until a corresponding controller message is received. The right hand decimal  
point in the display window lights to show that the unit is in MIDI remote active mode.  
F.4.4 Changing the MIDI channel  
• Press and hold SETUP/MIDI until the SETUP/MIDI LED flashes.  
• Use the D-Pot to select ‘m1’ (MIDI Setup). Press the D-Pot to select the MIDI Setup menu.  
• Use the D-Pot to select ‘ch’ (MIDI Channel). Press the D-Pot to select this option.  
• Use the D-Pot to set the MIDI Channel to listen to (‘01’ to ‘16’ or ‘al’ for ‘all’). Press the D-Pot to leave  
this option. The default value is all.  
F.4.5 Changing the MIDI controller assignments  
The default controller mapping is shown below:  
Default MIDI Controller Mapping  
MIDI Controller Master Module Control  
1
2
3
4
5
6
7
8
9
MIX  
REC  
EXT  
ALT  
MONO  
DIM  
CUT  
AFL Level  
Monitor LEVEL  
Page F-3  
 
X-Rack Owner’s Manual  
Optionally MIDI controllers can be mapped onto different Master module functions. To do this:  
• Press and hold SETUP/MIDI until the SETUP/MIDI LED flashes.  
• Use the D-Pot to select ‘m1’ (MIDI Setup). Press the D-Pot to select the MIDI Setup menu.  
• Use the D-Pot to select ‘le’ (MIDI Remote Learn) and press SAVE to enable learn mode.  
• Operate any one of the ‘soft’ controls on the XR622 Master module. This will cause the LED of the  
selected control to flash (the SEL LED will flash if either of the potentiometers have been chosen).  
Assign a MIDI controller to the selected function by operating the required MIDI controller. Repeat the  
‘operate – assign’ process for all required controls.  
• Press the D-Pot again to leave this option and return to the setup menu or press and hold SETUP/MIDI  
until the SETUP/MIDI LED stops flashing to return to normal operation.  
• Switch assignments can be reset to the system defaults by pressing COPY/DEL when in MIDI Remote  
Learn mode; the Empty LED indicating when the assignments have been deleted.  
Only single controls can be mapped to a MIDI controller. Therefore, mapping an X-Rack control to a MIDI  
controller which is already in use will remove the previous mapping. The original X-Rack control will require  
re-mapping itself before it can be controlled again.  
F.4.6 Level Compensation  
Each of the Insert Send, Mix Bus, Record Bus and Monitor outputs are provided with level compensation  
for driving low (600Ω) inputs. Level compensation is activated by removing a jumper for each output as  
follows:  
600Ω Output Level Compensation  
Link  
LK1  
LK2  
LK3  
LK4  
LK5  
LK6  
LK7  
LK8  
Output  
Alt/Main Monitor Right  
Record Bus Left  
Record Bus Right  
Alt/Main Monitor Left  
Insert Send Left  
Insert Send Right  
Mix Bus Left  
Mix Bus Right  
Page F-4  
 
X-Rack Master Module  
F.5 Performance Specification  
The following page contains audio performance specification figures for the X-Rack Master module. No  
other Solid State Logic products are covered by this document and the performance of other Solid State  
Logic products can not be inferred from the data contained herein.  
F.5.1 Measurement Conditions  
For each set of figures on the following pages, the specific unit and test setup will be stated at the  
beginning of that section. Any changes to the specified setup for any particular figure(s) will be detailed  
beside the figures to which that difference applies.  
F.5.2 Measurement References  
Unless otherwise specified the references used in this specification are as follows:  
• Reference frequency:  
1kHz  
• Reference level:  
0dBu, where 0dBu ≈ 0.775V into any load  
• Source impedance of Test Set:  
• Input impedance of Test Set:  
50Ω  
100kΩ  
• All unweighted measurements are specified as 22Hz to 22kHz band limited RMS and are expressed in  
units of dBu  
• All distortion measurements are specified with a 36dB/Octave low pass filter at 80kHz and are  
expressed as a percentage  
• The onset of clipping (for headroom measurements) should be taken as 1% THD  
• Unless otherwise quoted all figures have a tolerance of 0.5dB or 5%  
• All measurements are made with the operating level switch set for +4dBu  
F.5.3 Mix Bus Performance  
Signal applied to one channel of an X-Rack Line Input module and routed to Mix Bus. Signal measured  
on Mix Output. All other inputs un-routed from the bus under test. Mix Bus Gain control set to 0dB.  
Gain  
Continuously variable from –∞ to 0dB  
THD + Noise  
< 0.005% from 20Hz to 10kHz,  
< 0.008% at 20kHz  
(+24dBu applied, 0dB gain)  
Frequency Response  
0.1dB from 20Hz to 20kHz  
–3dB at 150kHz  
Equivalent Input Noise  
< –88dBu  
(Input terminated with 150Ω)  
F.5.4 Record Bus Performance  
Signal applied to one channel of an X-Rack Line Input module and routed to Record Bus. Signal measured  
on Record Output. All other inputs un-routed from the bus under test.  
THD + Noise  
< 0.005% from 20Hz to 20kHz  
(+24dBu applied, 0dB gain)  
Frequency Response  
0.1dB from 20Hz to 20kHz  
–3dB at 150kHz  
Equivalent Input Noise  
< –88dBu  
(Input terminated with 150Ω)  
Page F-5  
 
X-Rack Owner’s Manual  
F.6 Calibration Information  
The X-Rack Master module is factory calibrated and should only need calibration if a potentiometer or  
other component has been replaced or if it is suspected that there is a problem with calibration.  
In each of the following instructions it is assumed that the lid of the X-Rack has been removed and that  
power has been applied. It is also assumed that, unless otherwise specified, all switches are released and  
all front panel potentiometers are at unity or minimum position as appropriate. The required accuracy for  
each adjustment will be specified along with the target value. All level and distortion measurements  
should be made with audio-band 20Hz to 20kHz filters unless otherwise specified.  
All presets are accessible from the top of the unit.  
F.6.1 Mix Level Tracking  
Equipment Required:  
Calibrated audio oscillator and audio level meter  
1kHz sinewave @ +24dBu  
Test Signal:  
Input and Output:  
Oscillator to Insert Return Left  
Output to the audio level meter from Mix Bus Output (use Left or Right  
as instructed below)  
Unit Setup:  
Adjustment:  
Select ‘INS’ and set ‘MIX LEVEL’ to centre.  
1. Measure Mix Bus Output Left and note the reading.  
2. Connect the oscillator to Insert Return Right.  
3. Measure Mix Bus Output Right and adjust VR6 (‘TRACKING’) for a level  
which matches that measured in step 1.  
F.6.2 Meter Level  
Equipment Required:  
Calibrated audio oscillator and audio level meter  
1kHz sinewave @ +24dBu  
Test Signal:  
Input and Output:  
Oscillator to Insert Return Left  
Output to the audio level meter from Follow Mon Output (use Left or  
Right as instructed below)  
Unit Setup:  
Adjustment:  
1. Select ‘INS’ and set ‘MIX LEVEL’ to maximum.  
2. Select  
1. Measure the Left ‘Follow Mon’ Output. Adjust the oscillator level to  
obtain +24dBu, if necessary.  
2. Adjust VR5 (‘0dB LEFT’) so that that the top left hand ‘red’ LED on the  
bargraph meter just illuminates.  
3. Connect the oscillator to Insert Return Right.  
4. Measure the Right ‘Follow Mon’ Output. Adjust the oscillator level to  
obtain +24dBu, if necessary.  
5. Adjust VR4 (‘0dB RIGHT’) so that that the top right hand ‘red’ LED on the  
bargraph meter just illuminates.  
Page F-6  
 
X-Rack Master Module  
F.7 Connector Details  
Ins Rtn, Ext, Mon, Alt Mon  
Ins Snd, Mix, Rec, Fol Mon  
Location:  
Rear Panel  
Location:  
Rear Panel  
Conn’ Type:  
25-pin ‘D’ Type Female  
Conn’ Type:  
25-pin ‘D’ Type Female  
Pin  
Description  
Cct  
Pin  
Description  
Cct  
1
Alt Monitor Out Right (+ve)  
14 Alt Monitor Out Right (–ve)  
0V  
1
Follow Monitor Right (+ve)  
14 Follow Monitor Right (–ve)  
0V  
8
8
2
2
15 Alt Monitor Out Left (+ve)  
Alt Monitor Out Left (–ve)  
16 0V  
Main Monitor Out Right (+ve)  
17 Main Monitor Out Right (–ve)  
0V  
18 Main Monitor Out Left (+ve)  
Main Monitor Out Left (–ve)  
19 0V  
External Input Right (+ve)  
20 External Input Right (–ve)  
0V  
21 External Input Left (+ve)  
External Input Left (–ve)  
22 0V  
Mix Insert Return Right (+ve)  
23 Mix Insert Return Right (–ve)  
0V  
24 Mix Insert Return Left (+ve)  
Mix Insert Return Left (–ve)  
25 0V  
15 Follow Monitor Left (+ve)  
Follow Monitor Left (–ve)  
16 0V  
Record Output Right (+ve)  
17 Record Output Right (–ve)  
0V  
18 Record Output Left (+ve)  
Record Output Left (–ve)  
19 0V  
Mix Output Right (+ve)  
20 Mix Output Right (–ve)  
0V  
21 Mix Output Left (+ve)  
Mix Output Left (–ve)  
22 0V  
Mix Insert Send Right (+ve)  
23 Mix Insert Send Right (–ve)  
0V  
24 Mix Insert Send Left (+ve)  
Mix Insert Send Left (–ve)  
25 0V  
3
7
6
5
4
3
2
1
3
7
6
5
4
3
2
1
4
4
5
5
6
6
7
7
8
8
9
9
10  
11  
12  
13  
10  
11  
12  
13  
n/c  
n/c  
Please note that the ‘D’ type connector binding posts fitted to the X-Rack Master Module are 4-40 UNC thread.  
Headphones  
Location:  
PL2  
Front Panel  
Location:  
Internal  
Conn’ Type:  
Stereo 1/4" Jack Socket  
Conn’ Type:  
16-pin IDC Plug  
Pin  
Tip  
Ring  
Sleeve  
Description  
Left  
Pin  
Description  
n/a  
For Future Expansion  
0V  
Page F-7  
 
X-Rack Owner’s Manual  
F.8 Physical Specification  
Depth:  
200mm / 7.9 inches  
including front panel knobs, excluding connectors  
including front panel knobs and connectors  
275mm / 10.9 inches  
171mm / 6.75 inches  
Height:  
Width:  
35mm / 1.4 inches  
49mm / 1.9 inches  
front/rear panels  
overall width (front and rear panels are offset)  
Weight:  
260g / 9.5 ounces  
Boxed size:  
190mm x 290mm x 70mm / 7.5" x 11.5" x 2.5"  
460g / 16.5 ounces  
Boxed weight:  
* All values are approximate  
F.9 Environmental Specification  
As per X-Rack – see page 19.  
Page F-8  
 

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