INTRODUCTION

The ROLLS REQ series equalizers are intended for room equalizing or sound shaping and the approximate frequency response curve can be seen graphically by the settings of the frequency controls. Recording and broadcasting studios, sound contractors and musicians will appreciate the low noise, straightforward design, and versatile signal control of the REQ series.

INSTALLATION

Your REQ series equalizer may be installed in a standard 19î rack or placed in any dry, well ventilated area. The 1/4î connectors are balanced with the tip being positive (+) and the ring negative (-), or will assume an unbalanced state with unbalanced (TS) connectors. The XLR connectors are pin 2 positive (+). The chassis is lifted from the circuit ground (as are all ROLLS products) to help prevent ground loops. Since there are three types of input/output connectors, one type may be used on the input and another on the output. This helps to eliminate the need for special cables.

FRONT PANEL

The POWER switch is on when the red portion is showing. The VOL control provides the boost or cut settings for the input signal level. The LED bargraph shows the actual output level in dB so the use will know when the headroom is exhausted. EQ IN/OUT is for bypassing the equalizer circuits. The HPF and LPF controls are shelving filters , their 3dB down frequencies are indicated on the dials. For widest bandwidth, the HPF should be on 10Hz and the LPF should be set to 30 kHz. Frequency band slider controls cut or boost the indicated frequency by +/- 12 dB for the REQ131, or +/- 6 dB for the REQ215. When the slider is in the center or detented position, the frequency is left unmodified.

REAR PANEL

The rear panel contains the XLR, 1/4î, and RCA input and output jacks. Connect the power cable to a properly grounded AC outlet.

OPERATION AND APPLICATIONS

The REQ equalizers are useful signal processing tools where precise frequency control is needed across the audio spectrum. The frequency band centers are ISO standard, so it is compatible with most real time analyzers. When used with an analyzer, the REQ units may be used to tune an acoustical environment to avoid ringing (feedback), increase clarity, and flatten the overall frequency re- sponse. An analyzer is useful in determining the amount of equalization needed. Insert the graphic equalizer between the signal source and the power amplifier or crossover. Adjust the level and equalization as required to yield the desired system response. The HPF and LPF are used to band-limit the frequency re- sponse to increase clarity and reduce noise.

EXAMPLE

 

 

 

 

 

 

 

 

LEFT .RET

OUT RIGHT

LEFT .RET

OUT

 

 

 

 

 

 

 

 

2 AUX

1 AUX

2 AUX

1 MIC

2 MIC

3 MIC

4 MIC

5/6 MIC

7/8 MIC

9/10 MIC

11/12 MIC

 

 

 

 

+10

+10

+10

+10

+10

+10

+10

+10

.RET

 

RIGHT .RET

OUT

RIGHT2 AUX

OUT LEFT

1 AUX

1 AUX

TRIM

TRIM

TRIM

TRIM

TRIM

TRIM

TRIM

TRIM

 

 

 

 

+60

+60

+60

+60

+60

+60

+60

+60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HPF

 

LPF

 

LEVEL

 

 

 

 

 

 

 

 

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

25

31.5

40

50

63

80

100

160

200

250

315

400

500

630

800

1K

1.2K

1.6K

2K

2.5K

3.1K

4K

5K

6.3K

8K

10K

12.5K

16K

LINE

LINE

LINE

LINE

RIGHT

RIGHT

RIGHT

RIGHT

IN

OUT

50

100

4

6

0

+17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+12

 

 

 

 

 

 

 

 

TAPE

TAPE

30

 

200 2

 

10

 

+10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

 

 

1.5

 

 

 

 

PWR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER PHANTOM

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INSERT

INSERT

INSERT

INSERT

LEFT

LEFT

LEFT

LEFT

 

 

 

400

 

 

 

 

-7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+48V

16

HZ

500 1

KHZ

30 -12

 

+12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-12

 

 

 

 

 

 

 

 

R

 

EQ

 

 

 

 

 

-13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF

 

 

 

 

 

LEFT

RIGHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BYPASS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L PAN R

L PAN R

L PAN R

L PAN R

L BAL R

L BAL R

L BAL R

L BAL R

 

 

 

 

 

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

0 AUX 2 10

 

 

 

 

12.5 k

 

12.5 k

 

12.5 k

 

12.5 k

 

12.5 k

 

12.5 k

 

12.5 k

 

12.5 k

RETURN

 

 

 

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

HIGH

 

 

 

 

 

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

0

10

 

 

 

 

AUX 1

 

 

 

 

2.5 K

 

2.5 K

 

2.5 K

 

2.5 K

 

2.5 K

 

2.5 K

 

2.5 K

 

2.5 K

RETURN/

 

 

 

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

 

MID

TAPE IN LEVEL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOLUME 1

VOLUME 2

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

-15

+15

 

0

10

 

 

 

60

 

60

 

60

 

60

 

60

 

60

 

60

 

60

 

HEADPHONE LEVEL

HEADPHONE

 

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

LOW

 

 

 

OUTPUT

POWER AMPLIFIER RA200

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+8

 

 

 

0 AUX 2 10

0 AUX 2 10

0 AUX 2 10

0 AUX 2 10

0 AUX 2 10

0 AUX 2 10

0 AUX 2 10

0 AUX 2 10

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-13

 

 

 

0 AUX 1 10

0 AUX 1 10

0 AUX 1 10

0 AUX 1 10

0 AUX 1 10

 

0 AUX 1 10

0 AUX 1 10

0 AUX 1 10

+20

+20

+20

+20

+20

+20

+20

+20

+20

+14

+14

+14

+14

+14

+14

+14

+14

+14

+6

+6

+6

+6

+6

+6

+6

+6

+6

0

0

0

0

0

0

0

0

0

-10

-10

-10

-10

-10

-10

-10

-10

-10

-15

-15

-15

-15

-15

-15

-15

-15

-15

-20

-20

-20

-20

-20

-20

-20

-20

-20

-30

-30

-30

-30

-30

-30

-30

-30

-30

-

-

-

-

-

-

-

-

-

1

2

3

4

5/6

7/8

9/10

11/12

LEFT

RIGHT

SPECIFICATIONS

 

 

Frequency Response:

16 Hz to 30 kHz +/-3 dB

 

THD:

<.03%

 

S/N Ratio:

>90 dB

 

Max Input:

+21 dB (REQ131)

 

 

+17 dB (REQ215)

 

Max Output:

+21 dB (REQ131)

 

 

+17 dB (REQ215)

 

Input Impedance:

10K(20K balanced)

 

Output Impedance:

50

 

LED Levels:

+17, +10, 0, -7, and -13 dB

 

Frequency Centers:

31 ISO standard 1/3 octave +/-3%

(REQ131)

 

15 ISO standard 2/3 octave +/-5%

(REQ215)

Shelving Slope:

12 dB / Octave (REQ131)

 

 

6 dB / Octave (REQ215)

 

Size:

19" x 6" x 1.75"

 

 

(48.3 x 15.2 x 4.5 cm)

 

Weight:

5 lbs. (2 kg)

 

Page 2
Image 2
Rolls REQ131 Introduction, Installation, Front Panel, Rear Panel, Operation and Applications, Example, Specifications

REQ215, REQ131 specifications

Rolls-Royce has established itself as a leader in the engine manufacturing industry, producing high-quality products that push the boundaries of engineering. Among its latest innovations are the Rolls-Royce REQ215 and REQ131 engines, which demonstrate the company's commitment to performance, efficiency, and sustainability.

The Rolls-Royce REQ215 engine is renowned for its robust design and advanced technology. It features a high bypass ratio, which significantly enhances fuel efficiency by allowing more air to bypass the core of the engine. This design not only improves fuel economy but also lowers emissions, aligning with global environmental targets. The engine incorporates state-of-the-art materials, including lightweight composites, which contribute to a reduced overall weight while maintaining structural integrity. The REQ215 is equipped with a next-generation digital control system that optimizes performance in real-time, allowing for adaptive adjustments based on flight conditions. This ensures maximum efficiency across various operational profiles.

On the other hand, the Rolls-Royce REQ131 engine is tailored for regional and turboprop aircraft, providing an impressive balance of power and efficiency. One of its main features is the advanced variable-pitch propeller system, which enhances thrust during takeoff and climbing phases while adjusting for fuel efficiency during cruise. The REQ131 engine is designed with reliability in mind, featuring proven technologies that ensure prolonged operational life and reduced maintenance downtime. The integration of predictive maintenance capabilities allows operators to monitor engine performance continuously, enabling proactive servicing that lowers operational costs.

Both engines utilize Rolls-Royce's innovative engine health monitoring systems that gather data on engine performance, wear, and tear. This information is crucial for optimizing maintenance schedules and improving operational efficiency. The REQ215 and REQ131 engines represent a significant leap forward in aerospace technology, offering reduced environmental impact without compromising on performance.

In summary, the Rolls-Royce REQ215 and REQ131 engines embody the cutting-edge of aerospace engineering, with features that include high-efficiency designs, advanced materials, and intelligent monitoring systems. Rolls-Royce continues to lead the industry with its commitment to innovation, focusing on providing reliable, efficient, and sustainable propulsion solutions for the future of air travel.