ME15S Graphic Equalizer

ME15S Front

ME15S Rear


  • Constant-Q Bandwidth Design
  • Overall Level Controls and Passive Bypass Switches
  • 20 mm Filter Slide Controls with ±6 dB or ±12 dB Slider Range
  • Infrasonic, Ultrasonic, & RFI Filters
  • Balanced XLR and 1/4" TRS Inputs and Outputs
  • Universal internal switching power supply (100-240 VAC)

ME15S Graphic Equalizer

ME15S Front

The Rane ME15S microGraphic Equalizer is a two-channel, 2/3-octave design with 20 mm sliders in a single rack space unit. It features a Range switch for high slider resolution in the ±6 dB mode, equivalent resolution to 45 mm sliders found on the DEQ 60L. The ±12 dB mode provides a wide range of control over system audio.

The active filter sections feature Rane’s innovative constant-Q (constant bandwidth) design. Constant-Q means the bandwidth of each individual filter is guaranteed to be narrow enough to prevent unwarranted interaction between filters, yet wide enough to produce exactly the type of correction curve demanded by even the most unusual acoustic surroundings. This differs dramatically from conventional designs of the past, encumbered with the unfortunate characteristic of changing bandwidth when changing boost/cut amounts.

Front panel controls and indicators include an overall rotary Level control for each channel as well as Overload indicators. Passive pushbutton Bypass switches feature LED indicators, avoiding ambiguity by being on when the unit is Bypassed. (A passive Bypass switch requires no power to operate. This allows completion of the audio path should power fail in the ME15S.)

Inputs and Outputs are electronically balanced designs, capable of unbalanced operation when required. They accept and drive all possible signal levels into normal load impedances. Balanced applications choose between the XLR or 1/4" Tip-Ring-Sleeve connectors. Unbalanced sources also may tie to the ME15S through mono 1/4" connectors (no ring connection).

Constant-Q Filters

Constant-Q graphic equalizers arose from the sound professional’s need for greater control with less interaction than previously possible with conventional equalizers. 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.

The accompanying figures dramatically show the advantages of constant-Q designs. For more explanation, consult the references below.

Constant-Q vs Proportional-Q

ME15S Specifications

Parameter Specification Limit Conditions/Comments
..........Bands (15) 2/3-octave ISO spacing, from 25 Hz to 16 kHz
..........Type Constant-Q    
..........Accuracy 3 %   Center frequency
..........Travel 20 mm   Positive grounded center detent
..........Range ±12 or ±6 dB 1 Switch selectable
Inputs: Type Active balanced / unbalanced
..........Connectors XLR & 1/4" TRS    
..........Impedance 20k Ω balanced;
10k Ω unbalanced
..........Maximum Level 20 dBu 1  
Outputs: Type Active balanced / unbalanced
..........Connectors XLR & 1/4 TRS"    
..........Impedance 400 Ω balanced
200 Ω unbalanced
..........Maximum Level +20 dBu balanced
+15 dBu unbalanced
2 kΩ
  +19 dBu balanced
+13 dBu unbalanced
600 Ω
Overall Gain Range Off to +0 dB min Unbalanced output, sliders centered
  Off to +6 dB min Balanced output, sliders centered
RFI Filters Yes    
Bypass Switches Yes   Passive
LED Thresholds: Overload 4 dB 1 Below clipping
Infrasonic Filter 20 Hz, 18 dB/octave 3% Butterworth
Freq. Response 20-100 kHz   +0/-3 dB
THD+Noise 0.011 % max +4 dBu, 20-20 kHz, 20k BW
IM Distortion (SMPTE) 0.01 % max 60 Hz / 7 kHz, 4:1, +4 dBu
Signal-to-Noise Ratio re +20 dBu
re +4 dBu
  20 kHz noise bandwidth
  107 dB
91 dB
2 Sliders centered, unity gain, balanced
  92 dB
76 dB
2 Full boost, unity gain, balanced
  104 dB
88 dB
2 Full cut, unity gain, balanced
Channel Separation 85 dB min 1 kHz
Common Mode Rejection 40 dB 1 1 kHz
Unit: Max. Power 7 W    
.....Line Voltage 100-240 VAC   50/60 Hz
.....Agency Listing     UL/cUL/CE
..... Construction All steel    
.....Size (1U) 1.75" H x 19" W x 5.25" D (4.4 cm x 48.3 cm x 13.3 cm)
.....Weight 5 lb   (2.3 kg)
Shipping: Size 4.25 x 20.3 x 13.75 (10.8 cm x 52 cm x 35 cm)
.....Weight 8 lb   (3.6 kg)
Note: 0 dBu=0.775 Vrms

ME15S Literature

Each unit is shipped with a booklet containing all of the above, the RaneNote "Sound System Interconnection," Declaration of Conformity, and Rane's 2+ Year Warranty information.

ME15S Support

Can I use both the XLR and 1/4" outputs at the same time?

Yes. Both sets of output connections may be used simultaneously. However only one input may be used at a time. If you combine a unbalanced 1/4" with a balanced XLR you could create a ground loop problem. See "Sound System Interconnection" below.

What's the difference between the "B" and "S" and "non-B/S" versions?

The earlier (non-B) units only had 1/4" inputs and outputs. Inputs are fully balanced, outputs are single-ended (some say "quasi-balanced") auto balancee/unbalanced. Ability to drive longer cables is less and high frequency rolloff can be a concern due to cable capacitance. Around 1994 we updated the design and changed to the "B" designation. These units have fully balanced inputs and outputs, both XLR and 1/4" TRS connections being utilized. Functionally the units are virtually identical. With the exception of much enhanced grounding, the older units possess almost the same sonic quality. The "S" versions have a new universal power supply, operating from 100-240 VAC (true for all Rane "S" suffix models).

If the above options don't answer your question, or it's urgent...
Phone 425-355-6000, 8:30 AM to 5 PM PST, Monday through Friday.
If it's less urgent, you can email the factory.
For local service within the USA, find a service center.