TOA Electronics U-13R - Unbalanced Line Input Module with High/Low Cut Filters and Mute-Receive for 900 Series (Dual RCA) - Manual (Page 20)

• For Unbalanced, Line Level Sources such as AM/FM
tuners, cassette decks, CD players, computer sound cards,
jukeboxes, mixers and satellite receivers.
• Use For Adjacent Sources (less than 15 feet from the
host unit).
• Remote Volume Control by connecting an external 10 k
Ω
,
linear-taper potentiometer to screw terminals #4 and #5.
• Tip! You can also connect a switch between screw terminals
#4 and #5 for remote on/off operation. Closing the switch
turns the module OFF, opening the switch turns the module
ON.
Note: Control line resistance greater than 200
Ω
will prevent full
attenuation (200
Ω
= 3821 ft. of #24 AWG wire).
• Tip! You can also use the U-21 as a stand-alone Remote
Volume control by cutting Jumper J2 to disconnect the
module's output from the mix bus. This function is useful in
original 900 Series mixer/amplifiers which did not have
built-in Remote Master Volume terminals or, as a second
Remote Master Volume for the A-903/6/12MK2
mixer/amplifiers, the AX-1000A auto-mixer or the M-
900MK2 mixer/pre-amplifier. Connect the module input to
the "Pre-Out" jack (or mixer output) and the module output
to the "Power-In" jack (or adjacent power amplifier).
• Connector: screw terminal (U-21S).
U-21
U-14
U-21S Unbalanced Line Input with Remote Volume Control
LINE INPUT MODULES: UNBALANCED PAGE 21
CONNECTOR DIAGRAMS
SPECIFICATIONS
BLOCK DIAGRAM
U-21S
U-21S
U-21S (Master Volume)
Faceplate Controls Gain, terminals for 10 kohm linear-taper pot.
Input Impedance 220 kohms, unbalanced
Sensitivity -18 ~ +12 dBu
Gain -30 ~ 0 dB
Noise (S/N) 90 dB
BGM
B
G
M
J
U
K
E
GATE
JUKE
U-14R
U-14R Dual Input Priority w/AGC and Mute-Receive
• Dual Input Module for applications with business music
plus an on-premises CD jukebox or other source
• Two Line Inputs – Jukebox and BGM
• Auto-Mute Function with adjustable Mute threshold
(Jukebox overrides BGM)
• Automatic Gain Control (AGC) on Jukebox input for
consistent signal levels
• Individual Input Level Controls
• Connector: Stereo-Summing Dual RCA Jacks
• Mute-Receive Function – Cut jumper(s) to disable Mute
1 or Mute 2
SPECIFICATIONS
CONNECTOR DIAGRAM
BLOCK DIAGRAM
U-14R
U-14R
Input 47k ohms (unbalanced)
Maximum Output +14 dBV (5 Vrms)
Frequency Response 20 - 20,000 Hz, +1, -1 dB
Distortion BGM: 0.03% (1 kHz, 1 Vrms)
JUKE: 0.05% (1 kHz, 1 Vrms)
Output Level Var. Range BGM: -24 to -4 dBV (-10 dBV
input to L and R)
JUKE: -24 to -4 dBV (-10 dBV
input to L and R)
JUKE Gate Threshold Level Var. Range -60 to -30 dB (input to L and R)