Rane SEQ 30L, SEQ 30 User Manual

DATA SHEET

SEQ 30S & 30L

STEREO GRAPHIC EQUALIZERS

SEQ 30S

SEQ 30L

General Description

Here’s the long and the short of it. The SEQ 30S uses
Short space-saving 20 mm sliders, while the SEQ 30L uses
Long and more precise 45 mm sliders. All other features are
identical.

The SEQ 30S and SEQ 30L are 30-band equalizers with
ultimate stereo accuracy. The single set of faders controls
both left and right channels simultaneously, maintaining true
stereo tracking and utilizing constant-Q technology. These
EQs fill the void for true stereo applications.

Both models are accurate, professional quality instru­ments capable of precise equalization down to a fraction of a
dB. You can expect several advantages from your constant-Q
equalizer over conventional designs: moving one slider will
not affect neighboring filters as much, so you won’t spend

Features

• 30 Bands of Constant-Q Filters on Ganged Stereo Sliders

• Extremely Low Noise: 115 dB Dynamic Range

• Signal (+4 dBu) and Overload Indicators

time re-adjusting sliders (we call this “equalizing the equal­izer”). You’ll be able to obtain better feedback control
without losing sound quality. All sliders maintain smooth,
consistent and accurate calibrated control over filter levels,
which is especially critical in low-profile equalizer designs.
Because of this, the overall EQ adjustment process is signifi­cantly easier and more effective.

An Input Level control is provided along with a Bypass
switch, enabling easy gain comparisons between equalized
and unequalized signal. +4 dBu and Overload indicators
detect both input and post-EQ levels.

Either unit interfaces easily to many types of systems. Use
the balanced XLR Inputs and Outputs, or the balanced ¼"
TRS Inputs and unbalanced ¼" TS Outputs.

SEQ 30S

• 20 mm Filter Sliders Control Both Left & Right Channels

SEQ 30L

• ±12 dB Level Control for Optimum Gain Structure

• Low Noise Toroid Transformer

• Balanced XLR & ¼" Connectors

• Internal AC Power Supply Meets European CE Requirements

• 45 mm Filter Sliders Control Both Left & Right Channels

Data Sheet-1

SEQ 30S & 30L

STEREO GRAPHIC EQUALIZERS

Features and Specifications

Parameter Specification Limit Units Conditions/Comments

Equalizer:

..........Channels Two

..........Bands (2x30) 1/3-Octave ISO Spacing From 25 Hz to 20 kHz

..........Type Constant-Q Smooth combining

..........Accuracy 3 % Center frequency

..........Travel, MQ 302S 20 mm Positive grounded center detent

..........Travel, MQ 302L 45 mm Positive grounded center detent

..........Range ±12 1 dB

Inputs:

..........Type Active Balanced

..........Connectors XLR & ¼" TRS Pin 2 “hot” per AES standards

..........Impedance 20k 1% ohms

..........Maximum Level 21 1 dBu

Outputs:

..........XLR Active Balanced 100 ohms impedance each leg

..........¼" Active Unbalanced 100 ohms impedance

..........Maximum Level +20 1 dBu 2k ohms balanced & unbalanced

Overall Gain Range -12 to +12 ±1.5 dB Sliders centered
RFI Filters Yes
Frequency Response 20-20 kHz +0,-2 dB
THD+Noise 0.009 0.002 % +4 dBu, 20-20 kHz
IM Distortion (SMPTE) 0.005 0.003 % 60 Hz/7 kHz, 4:1, +4 dBu
Signal-to-Noise Ratio 20 kHz noise BW; balanced out re +4 dBu

96 2 dB Sliders centered, re +4 dBu, 20 kHz BW
76 2 dB Sliders all boosted, re +4 dBu, 20 kHz BW

91 2 dB Sliders all cut, re +4 dBu, 20 kHz BW
Channel Separation 80 3 dB 1 kHz
Common Mode Rejection 40 1 dB 1 kHz
Maximum Power 12 W
Unit: Agency Listing

..........120 VAC model UL UL 6500 (file E104174)

cUL (Canada) C22.2 (file E104174)

..........230 VAC model CE-EMC EN55103, EN55020 EMC Directive 89/336/EEC

CE-Safety EN60065 LV Directive 73/23/EEC

..........Construction All Steel

MQ 302S: Size 1.75"H x 19"W x 8.5"D (1U) (4.4 cm x 48.3 cm x 21.6 cm)

..........Unit Weight 5 lb (2.3 kg)

..........Shipping Size 4.25" x 20.3" x 13.75" (11 cm x 52 cm x 35 cm)

..........Shipping Weight 9 lb (4.1 kg)

MQ 302L: Size 3.5"H x 19"W x 8.5"D (2U) (8.9 cm x 48.3 cm x 21.6 cm)

..........Unit Weight 7 lb (3.2 kg)

..........Shipping Size 4.25" x 20.3" x 13.75" (11 cm x 52 cm x 35 cm)

..........Shipping Weight 11 lb (5.0 kg)

Note: 0 dBu = 0.775 Vrms

Data Sheet-2

SEQ 30S and SEQ 30L Block Diagram

SEQ 30S & 30L

STEREO GRAPHIC EQUALIZERS

Application Information

Constant-Q graphic equalizers arose from the sound
professional’s need for greater control with less interaction
than previously possible with conventional equalizers. Truth
in slider position became a requirement. The curve traced out
by the slider positions on constant-Q designs indeed repre­sents the actual changes to the frequency response. On
conventional designs they do not.

You use a constant-Q graphic the same way you use a
conventional graphic. You just get the desired results quicker,
with far less after adjustment to the adjacent sliders. Eliminat­ing a phenomena Rane calls “equalizing the equalizer”.

The accompanying figures dramatically show the advan­tages of constant-Q designs. For more in-depth information
please see RaneNote 101, “Constant-Q Graphic Equalizers.”

Data Sheet-3

SEQ 30S & 30L

STEREO GRAPHIC EQUALIZERS

SEQ 30S Rear Panel

SEQ 30L Rear Panel

Architectural Specifications

The graphic equalizer shall be of constant-Q design to
minimize interactions between adjacent bands, and contain
frequency bands located on standard ISO center frequencies.
Each band shall have a bandwidth of 1/3-octave with a boost/
cut range of 12 dB. A detented and positively grounded 0 dB
point shall be provided on 20 mm (SEQ 30S) or 45 mm (SEQ
30L) linear sliders with dust dams. A single set of sliders shall
control both channels. A rotary overall level control shall be
provided with a range from 12 dB of attenuation to 12 dB of
gain. The level control shall provide a detented 0 dB center
point.

©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 TEL [phone] FAX [phone] WEB http://www.rane.com

Data Sheet-4

All features & specifications subject to change without notice. DOC 10566 PN 12243 5-01

The unit shall include +4 dBu and overload indicators

detecting both input and post-equalizer levels.

The inputs shall be active balanced/unbalanced designs
terminated with both XLR and ¼" TRS (tip-ring-sleeve)
connectors. The outputs shall have active balanced XLR and
unbalanced ¼" TS (tip-sleeve) connectors. RFI filters shall be
provided. The unit shall provide a bypass switch.

The unit shall be capable of operation by means of its own
built-in power supply connected to 120 VAC (230 VAC
where applicable) and meet CE requirements. The chassis
shall be entirely constructed from cold-rolled steel.

The unit shall be a Rane Corporation SEQ 30S or

SEQ 30L Stereo Graphic Equalizer.