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ROLLS

Rolls REQ215 Dual 15-Band Graphic EQ

$95.00

The REQ215 provides two independent channels of 15-band graphic equalization, utilizing ISO standard 2/3 octave frequency centers for accurate sound shaping and acoustic correction. Its design incorporates smooth band-pass filtering and transparent low-noise circuitry to ensure virtually distortion-free operation, making it suitable for a variety of demanding audio environments such as live sound, studios, and home theater setups. The front panel includes intuitive controls, including frequency sliders, channel level knobs, a bypass switch, and LED level indicators for easy monitoring and adjustment. The compact 1U rackmount chassis is built for durability and seamless integration into standard equipment racks.

View Product Features
  • Dual 15-Band Channels: Provides two independent 15-band graphic equalizer channels for stereo or dual-mono applications.
  • ISO Standard Frequency Centers: Features 15 ISO standard 2/3 octave frequency centers, allowing for precise tuning and compatibility with most real-time analyzers.
  • Wide Frequency Response: Offers a frequency response ranging from 16 Hz to 30 kHz (+/-3 dB), capturing a broad spectrum of audible sound.
  • Versatile I/O: Equipped with balanced XLR, 1/4" TRS, and unbalanced RCA input and output connectors for flexible integration with a wide range of audio gear.
  • Low-Noise Circuitry: Utilizes transparent, low-noise circuitry and smooth band-pass filtering for virtually distortion-free performance (THD <.03%).
  • Bypass Switch: Includes a front-panel In/Out bypass switch for each channel, allowing for easy comparison of the processed audio with the original source signal.
  • Level Control and Metering: Features a master level control knob for overall output adjustment and 5-segment LED meters (+17, +10, 0, -7, and -13 dB) for monitoring signal levels.
  • Adjustable Shelving Filters: Includes adjustable high-pass and low-pass shelving filters.
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About the Rolls REQ215 Dual 15-Band Graphic EQ

The Rolls REQ215 is a dual-channel, 15-band per channel graphic equalizer designed for precise tonal shaping and feedback control in professional audio systems. Each channel provides independent control over 15 fixed frequency bands, spaced at 1/3-octave intervals across the audible spectrum, allowing audio engineers and system technicians to make surgical adjustments to the frequency response of a sound system. This level of control is essential for tasks such as ring-out and feedback suppression in live sound reinforcement, tailoring the house curve to compensate for room acoustics in installed systems, and correcting tonal imbalances in recorded material during playback. The unit's dual-mono design makes it suitable for stereo applications or for processing two independent mono sources, such as separate mains and monitor feeds.

The equalizer features high-quality, center-detented slide potentiometers for each frequency band, providing a visual representation of the EQ curve and allowing for easy, repeatable adjustments. Each channel is equipped with a gain control to match input levels and a bypass switch to instantly compare the processed and unprocessed sound. The REQ215 is built with robust, low-noise circuitry to maintain signal integrity, ensuring that even significant EQ adjustments do not introduce excessive noise or distortion. Its design prioritizes functionality and reliability, making it a staple in live sound racks, installed church audio systems, and project studios where straightforward, effective EQ is needed.

Housed in a standard single-rack-unit (1U) metal chassis, the Rolls REQ215 is designed for easy integration into equipment racks. It features balanced XLR and 1/4-inch TRS input and output connectors, providing compatibility with both professional and semi-pro gear. The straightforward layout and intuitive controls minimize the learning curve, allowing users to focus on achieving the desired sound. While lacking the recallable presets and digital precision of modern DSP units, the REQ215 offers the immediacy and tactile feedback of an analog graphic EQ, which many engineers prefer for live ring-out and quick adjustments. It serves as a dependable and effective tool for system optimization, helping to achieve a clear, balanced, and feedback-free audio output in a wide variety of acoustic environments.

Key Features

  • Dual 15-Band Channels: Provides two independent 15-band graphic equalizer channels for stereo or dual-mono applications.
  • ISO Standard Frequency Centers: Features 15 ISO standard 2/3 octave frequency centers, allowing for precise tuning and compatibility with most real-time analyzers.
  • Wide Frequency Response: Offers a frequency response ranging from 16 Hz to 30 kHz (+/-3 dB), capturing a broad spectrum of audible sound.
  • Versatile I/O: Equipped with balanced XLR, 1/4" TRS, and unbalanced RCA input and output connectors for flexible integration with a wide range of audio gear.
  • Low-Noise Circuitry: Utilizes transparent, low-noise circuitry and smooth band-pass filtering for virtually distortion-free performance (THD <.03%).
  • Bypass Switch: Includes a front-panel In/Out bypass switch for each channel, allowing for easy comparison of the processed audio with the original source signal.
  • Level Control and Metering: Features a master level control knob for overall output adjustment and 5-segment LED meters (+17, +10, 0, -7, and -13 dB) for monitoring signal levels.
  • Adjustable Shelving Filters: Includes adjustable high-pass and low-pass shelving filters.

Rolls REQ215 Dual 15-Band Graphic EQ Specs

Equalizer Configuration
Channels
2 (Dual Mono/Stereo)
Bands per Channel
15
Frequency Spacing
1/3 Octave
Frequency Centers
Band Frequencies
20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k Hz (Typical Range)
Controls & Features
Slider Type
Center-Detented, 45mm Travel
Gain Control
Per Channel
Bypass Switch
Per Channel
Performance
Signal-to-Noise Ratio
>90 dB
Total Harmonic Distortion
<0.01%
Maximum Output Level
+20 dBu
Connectivity
Input Connectors
XLR & 1/4" TRS (Balanced/Unbalanced)
Output Connectors
XLR & 1/4" TRS (Balanced/Unbalanced)
Impedance
Balanced 10k Ohm, Unbalanced 5k Ohm
Physical & Power
Form Factor
1 Rack Unit (1U)
Power Supply
Internal, 115/230V AC Switchable
Dimensions
Standard 19-inch Rack Width

Key Features

  • Dual 15-Band Channels: Provides two independent 15-band graphic equalizer channels for stereo or dual-mono applications.
  • ISO Standard Frequency Centers: Features 15 ISO standard 2/3 octave frequency centers, allowing for precise tuning and compatibility with most real-time analyzers.
  • Wide Frequency Response: Offers a frequency response ranging from 16 Hz to 30 kHz (+/-3 dB), capturing a broad spectrum of audible sound.
  • Versatile I/O: Equipped with balanced XLR, 1/4" TRS, and unbalanced RCA input and output connectors for flexible integration with a wide range of audio gear.
  • Low-Noise Circuitry: Utilizes transparent, low-noise circuitry and smooth band-pass filtering for virtually distortion-free performance (THD <.03%).
  • Bypass Switch: Includes a front-panel In/Out bypass switch for each channel, allowing for easy comparison of the processed audio with the original source signal.
  • Level Control and Metering: Features a master level control knob for overall output adjustment and 5-segment LED meters (+17, +10, 0, -7, and -13 dB) for monitoring signal levels.
  • Adjustable Shelving Filters: Includes adjustable high-pass and low-pass shelving filters.
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