Architect’s and Engineer’s Specifi cations
1. GENERAL CONFIGURATION. The mixer shall
accommodate 6 microphone signals, mono chan-
nels 1–6; 14 line signals, mono channels 1–6 and
stereo channels 7–14; 2 stereo pairs of Aux Return
inputs; 6 Send/Return channel Inserts; 2 stereo
pairs of Main Mix outputs; 1 stereo pair of Control
Room outputs; 2 stereo pairs of RCA-type phono
Tape outputs and inputs; 1 stereo pair of Alt 3-4
outputs; 2 Aux Send outputs; and 1 stereo head-
phone output. The mixer shall be capable of place-
ment on a table or installation in a standard 19-inch
rack mount (via optional rack rail brackets) and
shall be entirely self-contained.
2. MIXER INPUTS.
MONO CHANNELS 1–6: The mixer shall include
6 XDR(tm) (Extended Dynamic Range) electronically
balanced mic inputs, using XLR-3-F-type connec-
tors, accepting nominal levels from –60dBu to
+4dBu via 6 rotary Trim controls. Phantom power
shall be available via a globally-controlled rocker-
type switch. 6 balanced or unbalanced (bal/unbal)
line inputs shall be wired in parallel, using 1/4" TRS
phone jacks, accepting nominal levels from –45dBu
to +4dBu. The mixer shall include 6 channel Inserts,
using 1/4" TRS phone jacks (tip=send, ring=return,
sleeve=ground), delivering and accepting nominal
levels from –10dBV to +4dBu.
STEREO CHANNELS 7/8, 9/10, 11/12 and 13/14:
The mixer shall include 8 bal/unbal line inputs,
forming 4 stereo input pairs, using 1/4" TRS phone
jacks, accepting nominal levels from –10dBV to
+4dBu, with +4dBu/–10dBV level switches. OTHER
INPUTS: The mixer shall include 4 bal/unbal Aux
Return inputs, forming two stereo pairs, using 1/4"
TRS phone jacks, accepting nominal levels from
–10dBV to +4dBu. The mixer shall include 1 stereo
pair of Tape In jacks, using unbalanced RCA-type
phono jacks, accepting nominal levels from –20dBV
to +0dBu.
3. MIXER OUTPUTS.
MAIN OUTPUTS: The mixer’s Main Output stereo
pairs shall be fi tted in three ways: Using balanced
XLR-3-M-type connectors, delivering maximum output
of +4dBu, including 1 Main Output Level switch to
provide 30dB attenuation (XLR outputs only; –26dBu
nominal level); using bal/unbal 1/4" TRS phone jacks,
delivering nominal levels from –10dBV to +4dBu; and
using unbalanced RCA-type phono jacks (labeled TAPE
OUT), delivering nominal levels from –10dBV to +4dBu.
OTHER OUTPUTS: The mixer shall include 1 stereo
pair of Alt 3-4 outputs using bal/unbal 1/4" TRS
phone jacks, delivering maximum output of +22dBu;
1 stereo pair of Control Room outputs using bal/
unbal 1/4" TRS phone jacks, delivering a maximum
output of +22dBu; 2 Aux Send outputs using bal/
unbal 1/4" TRS phone jacks, delivering nominal
levels from –10dBV to +4dBu; and 1 stereo Head-
phone output using an unbalanced 1/4" TRS phone
jack (tip=left, ring=right, sleeve=ground).
4. MIXER INPUT SECTION. In addition to the con-
trols listed in section 2 (MIXER INPUTS), each chan-
nel shall include 2 rotary Aux Send controls, provid-
ing up to 15dB gain; 3 rotary equalization (EQ) con-
trols: ±15dB @ 12kHz shelving, ±12dB @ 2.5kHz
peaking and ±15dB @ 80kHz shelving; 1 rotary Pan
control, 4dB attenuation panned center; 1 Mute/Alt
3-4 switch, to be used as a channel mute or to
route the signal to the alternate stereo bus (Alt
3-4); 1 dual-mode solo switch (AFL or PFL, globally
switched); and 1 channel fader, providing up to 10dB
above unity gain.
5. MIXER OUTPUT SECTION. The mixer shall have
2 Main Mix faders, providing up to 10dB gain; 1 Con-
trol Room/Submix Fader, providing up to 10dB gain;
1 Source Matrix including 3 switches to deliver any
combination of stereo signals to the Control Room,
Phones and Meters, including Main Mix, Alt 3-4 and
Tape, which shall be replaced by any solo signals
resulting from the engagement of any channel’s Solo
switch; 1 Assign to Main Mix switch to deliver the
Source Matrix signals to the Main Mix; 1 Solo Mode
switch to globally determine solo type (pre-fader
listen or after-fader listen, in place); 2 rotary Aux
Return level controls, providing up to 20dB gain; 1
rotary Aux Send 1 Master control, providing up to
10dB gain; 1 Aux Send global Pre/Post switch; 1 EFX
to Monitor switch, allowing Aux Return 1 signals to
be delivered to Aux Send 1 via the Aux Return 2 level
control; and 1 blinking red Solo LED, to indicate a
solo condition.
6. METERING. The mixer shall include 1 stereo
12-segment LED meter with points at –30, –20, –10,
–7, –4, –2, 0, +2, +4, +7, +10, and +28dB (clip).
The source signals for the meters shall be the same
signals selected in the Source Matrix, and a solo
condition shall replace the Source selection with the
