Rolls RA53b User manual

Rolls
Brand
Rolls
Model
RA53b
Category
Musical Equipment
Type
User manual

Rolls RA53b is a five-channel headphone/earphone amplifier with a variety of input options. In addition to the four master mix inputs, four separate mixes may be monitored using the main inputs and the three Insert jacks on Channels 1, 2, and 3. A 1/4” JOIN Input/Output jack is provided for connecting two RA53b units together, providing up to ten channels of headphone monitoring. The RA53b is loud, has plenty of gain for operation in noisy environments, and works with most any headphone impedance. It has plenty of gain for operation in noisy environments, and works with most any headphone impedance.

Rolls RA53b is a five-channel headphone/earphone amplifier with a variety of input options. In addition to the four master mix inputs, four separate mixes may be monitored using the main inputs and the three Insert jacks on Channels 1, 2, and 3. A 1/4” JOIN Input/Output jack is provided for connecting two RA53b units together, providing up to ten channels of headphone monitoring. The RA53b is loud, has plenty of gain for operation in noisy environments, and works with most any headphone impedance. It has plenty of gain for operation in noisy environments, and works with most any headphone impedance.

RA53b
Stereo Headphone Ampli er
Quick Start Guide
ROLLS CORPORATION
SALT LAKE CITY, UTAH
06/2011
PS12
12V AC
www.rolls.com
SPECIFICATIONS
Input Impedance: 10 K ohms
Max Input Level: +18 dBV
Max Gain: 26 dB per channel
Output Power: 221 mW per side, 442 mW per channel
(@ 32 Ohms)
Output Impedance: 10 Ohms
S/N Ratio: >90 dB
THD: <.08%
IMD (SMPTE): <.08%
Power: ROLLS PS12 - 12V AC
(Adapter Provided)
Size: 8.4” x 1.7” x 5”
(21.3 x 4.3 x 13 cm)
Weight: 2.5 lbs (1.14 kg)
1
ROLLS CORPORATION
5968 S 350 W
MURRAY, UTAH 84107
1
RA53b.SCH C
2 March 2003
Title
Size: Document Number:
Date:
Rev:
Sheet of
RA53b 5CH PRO HEADPHONE AMP
Rb
POWER
CHANNEL 1
CHANNEL 2
CHANNEL 3
CHANNEL 4
CHANNEL 5
VCC
VCC
VCC
VEE
VEE
VEE
VEE
VCC
VCC
VCC
VEE
VEE
VCC
VCC
VEE
VEE
VCC
VEE
VEE
VCC
VCC
VEE
VEE
VCC
VCC
VCC
VCC
VEE
VEE
VEE
VEE
VCC
VCC
VEE
VEE
VCC
MONO/RIGHT
STEREO/LEFT
VEE
VCC
2
3
1
J13
JAPDC
J1
PHONE 1/4
J2
PHONE 1/4
J3
PHONE 1/4
J5
PHONE 1/4
J7
PHONE 1/4
R712
47K
R711
47K
R107
10K
R108
10K
R207
10K
R208
10K
R307
10K
R308
10K
R507
10K
P508
10K
R407
10K
R708
10K
R101
10
R102
10
3
2
1
4
U1A
4560
2
3
1
4
U8A
4560
5
6
7
8
U8B
4560
6
5
7
8
U5B
4560
3
2
1
4
U4A
4560
6
5
7
8
U4B
4560
R401
10
J4
PHONE 1/4
R402
10
Q1
MPSA06
6
5
7
8
U1B
4560
R201
10
R202
10
6
5
7
8
U2B
4560
3
2
1
4
U2A
4560
R302
10
R301
10
6
5
7
8
U3B
4560
3
2
1
4
U3A
4560
Q20
2N2907
3
2
1
4
U5A
4560
R502
10
R501
10
D9
LDSG
1 3
2
P1A
P100K X2
4 6
5
P1B
P100K X2
R408
10K
1 3
2
P2A
P100K X2
4 6
5
P2B
P100K X2
1 3
2
P3A
P100K X2
4 6
5
P3B
P100K X2
1 3
2
P4A
P100K X2
4 6
5
P4B
P100K X2
1 3
2
P5A
P100K X2
4 6
5
P5B
P100K X2
Q2
2N2907
Q3
MPSA06
Q4
2N2907
Q5
MPSA06
Q6
2N2907
Q7
MPSA06
Q8
2N2907
Q9
MPSA06
Q10
2N2907
Q11
MPSA06
Q12
2N2907
Q13
MPSA06
Q14
2N2907
Q15
MPSA06
Q16
2N2907
Q17
MPSA06
Q18
2N2907
Q19
MPSA06
C1
120PF
C2
120PF
C3
120PF
C4
120PF
C5
120PF
C6
120PF
C7
120PF
C8
120PF
C9
120PF
C10
120PF
C13
10U
C16
10U
R703
10K
R704
10K
R707
10K
R709
10K
R710
10K
J6
PHONE 1/4
J11
PC 1/4
J12
PC 1/4
R701
10K
R702
10K
2
3
1
4
U7A
4560
R705
10K
R706
10K
5
6
7
8
U7B
4560
C11
120PF
C12
120PF
D2
1N4001
D4
1N4001
R3
10K
R4
10K
R503
30
R504
30
R403
30
R404
30
R104
30
R103
30
R204
30
R203
30
R304
30
R303
30
C18 503
R2
4.7K
R1
4.7K
R57
4.7K
J10
PHONE 1/4
D3
1N4001
D1
1N4001
C14
1KUF
C15
1KUF
C19
10UF 16V NP
J13
PC 1/4
12
3
J19
XLR JACK F
12
3
J20
XLR JACK F
R5
10K
R6
10K
R7
10K
R8
10K
R9
10K
R10
10K
1
2
J8A
RCAX2
3
2
J8B
RCAX2
J14
PHONE 1/8
J15
PHONE 1/8
J16
PHONE 1/8
J18
PHONE 1/8
J17
PHONE 1/8
SCHEMATIC
INTRODUCTION
Thank you for your purchase of the Rolls RA53b Stereo Headphone Ampli er. This unit
was designed to provide years of dependable service. Please read this manual carefully to
ensure proper operation.
The RA53b is a  ve-channel headphone/earphone ampli er with a variety of input options.
In addition to the four master mix inputs, four separate mixes may be monitored using the
main inputs and the three Insert jacks on Channels 1, 2, and 3.
A 1/4” JOIN Input/Output jack is provided for connecting two RA53b units together, provid-
ing up to ten channels of headphone monitoring.
Finally - the RA53b is loud. It has plenty of gain for operation in noisy environments, and
works with most any headphone impedance.
INSPECTION
Unpack and inspect the RA53b box and package.
If obvious physical damage is noticed, contact the carrier immediately to make a damage
claim. We suggest saving the shipping carton and packing materials for safely transporting
the unit in the future.
WARRANTY
For complete Warranty information and registration, please visit our website; www.rolls.
com. Click on the REGISTER YOUR WARRANTY HERE line. Or, complete the Warranty
Registration Card and return it to the factory.
DESCRIPTION
FRONT PANEL
Note: Descriptions for Channel One through Channel Five are identical.
OUTPUT: 1/4” and 1/8” (3.5mm) Tip-Ring-Sleeve jacks for connection to a stan-
dard pair of headphones or earphones. Output impedance is 10 Ohms.
LEVEL: Controls the amount of output signal from the indicated channel.
POWER LED: Indicates that the RA53b is connected to the power supply and is
on.
REAR PANEL
PS12
12V AC
www.rolls.com
POWER: For connection to a Rolls #PS12 - 12V AC power supply ONLY!!!
RIGHT/MONO INPUT: 1/4” TS jack for connecting the “Right” side of a stereo
signal. If used alone (nothing connected to the LEFT/STEREO jack), a 1/4” TS
plug with a mono signal will feed both sides of the RA53b Outputs.
LEFT/STEREO INPUT: 1/4” TRS jack for connecting to the “Left” side of a stereo
signal. If used alone,(nothing connected to the RIGHT/MONO jack) a 1/4” TRS
plug with the “Right” side of the program material on the tip, and the “Left” side
on the ring may be connected for stereo operation. For example, a stereo head-
phone output from a mixing console may be directly connected to the Left/Stereo
jack via a stereo TRS cable.
L /R INPUTS: RCA input jacks for connection to a signal source such as a CD or
cassette player.
BALANCED INPUTS: XLR input jacks for connection to a balanced line level
source such as the output of a mixer.
JOIN: 1/4” TRS jack for connection to another RA53b JOIN jack. Linking two
units together provides 10 channels of monitoring from a master stereo signal,
with six channels having an insert option.
CHANNEL INSERTs: 1/4” TRS jacks for receiving a stereo signal and directly ac-
cessing the indicated channel’s circuitry.
CONNECTION
Connect the Rolls Power Supply to the POWER jack on the RA53b rear panel. Connect
the power supply to an ac outlet.
Determine which input con guration you will use; either discreet right/left, TRS stereo, or
mono.
For a discreet right/left input con guration, connect a 1/4” TS plug containing the “Right”
portion of the stereo signal to the Right/Mono Input. Connect a 1/4” TS plug containing the
“Left” portion of the stereo signal to the Left/Stereo Input.
If connecting a balanced signal, use the XLR inputs instead of the 1/4” inputs and connect
as indicated above.
For a TRS stereo input con guration, connect a Tip-Ring-Sleeve stereo plug into the Left/
Stereo input. This cable may come from a mixer’s headphone output for example. Make
sure nothing is connected to the Right/Mono Input.
To send a mono signal to the RA53b, connect a 1/4” Tip-Sleeve plug into the Right/Mono
Input. This mono signal will be fed to both the right and left sides of the headphone out-
puts. Make sure nothing is connected to the Left/Stereo Input.
The RCA Aux Inputs are connected in the same manner as the discreet right/left input
con guration listed above.
To link another RA53b, simply connect a 1/4” TRS stereo cable to both JOIN jacks on two
RA53b units.
INSERTS
The Channel 1, 2 and 3 inserts have been provided so you can directly access Channel
1, Channel 2 and Channel 3 headphone and earphone outputs with their own program
material.
The inserts require Tip-Ring-Sleeve connectors, with right and left signals on the tip and
ring respectively.
When these insert jacks are used, the main Right/Stereo and Left/Mono, as well as the
RCA and XLR Inputs - are disconnected to that channel. Only the stereo signals sent to
the Insert jacks go to the corresponding outputs.
  • Page 1 1
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Rolls RA53b User manual

Rolls
Brand
Rolls
Model
RA53b
Category
Musical Equipment
Type
User manual

Rolls RA53b is a five-channel headphone/earphone amplifier with a variety of input options. In addition to the four master mix inputs, four separate mixes may be monitored using the main inputs and the three Insert jacks on Channels 1, 2, and 3. A 1/4” JOIN Input/Output jack is provided for connecting two RA53b units together, providing up to ten channels of headphone monitoring. The RA53b is loud, has plenty of gain for operation in noisy environments, and works with most any headphone impedance. It has plenty of gain for operation in noisy environments, and works with most any headphone impedance.

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