Owner's Manual

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MODEL EQ2015 SPECS:

Input Type: Balanced and unbalanced via male

and female XLR connector or 1/4”

phone jack

Input Impedance: 20 KΩ balanced

10 KΩ unbalanced

Maximum Input Level: +20 dBv balanced or unbalanced

Output Type: Balanced and unbalanced via male

XLR connector or 1/4” phone jack

Output Impedance: 600 Ω balanced

Maximum Output Level:

Unbalanced: +20 dBv (7.8 Vrms) into a 600 Ω

load or greater

Balanced: +26 dBv (15.6 Vrms) into a 600 Ω

load or greater

Input Gain Control: +6 dB to full attenuation

Boost Cut: ± 15 dB, +20 dBv into 600Ω

Center Frequencies: 25,40,63, 100, 160, 250, 400, 630,

1k,1.6k, 2.5k, 4k, 6.3k, 10k,

and 16 kHz ± 5%

Filter Type: Active bandpass filters (no inductors)

Frequency Accuracy: ±5% of nominal center frequency

Frequency Response

(with all sliders centered): ±1 dB, 10 Hz to 45 kHz

Bandwidth (-3 dB points): 7 Hz -85 kHz

Harmonic Distortion: <.01% THD, 20 Hz to 20 kHz

Noise (unweighted,

20 kHz bandwidth): 104 dB below full output

Slew Rate: 9 volts per microsecond

Power Requirements

US Model: 120 VAC, 60 Hz, 1/4 A, 5x20 fuse

Export Model: 230 VAC, 50 Hz, .125 A, 5x20 fuse

Package: 2 rack spaces

Dimensions: 19"W x 6"D x 3 1/2"H

Net Weight: 10 lbs.

CARVIN ENGINEERING DATA

OPERATING MANUAL

The EQ2015 & EQ2030 are professional 2/3 and 1/3 octave graphic

equalizers suitable for recording, sound reinforcement, guitar and bass

rigs, or home audio applications. Both units feature pro sound per-

formance from extended frequency response, wide dynamic range, and

low noise operation. Both offer large precision sliders with “sure-grip”

rubber boots, 15db of boost and cut per frequency, low interaction

between frequencies, and dual Sweepable High and Low cut filters. The

EQ2015 & EQ2030 are built to rugged specs for high reliability under

continuous use providing years of professional service.

INTERFACE & OPERATION

The EQ2015 & EQ2030 can be inserted into the audio signal path at any con-

venient point where there is a nominal “line level” signal. Never connect the speaker

output of an amplifier to the EQ2015 or EQ2030 as damage to both units may

occur. Balanced low impedance XLR w/ground lift and balanced/unbalanced 1/4”

connections are provided allowing the EQ2015 & EQ2030 to be interfaced with

professional audio equipment (with the proper cables). See Fig. 1.

RECORDING STUDIO APPLICATIONS

The EQ2015 & EQ2030 have many uses in the studio environment. They

can be used to balance and “flatten” the control room monitors, eliminate feed-

back in the studio mains, or to EQ individual recorded channels.

SOUND REINFORCEMENT

The EQ2015 & EQ2030 are the ideal tools for solving many live sound rein-

forcement problems. The most obvious use would be for eliminating feed-

back and fine tuning the main house speakers or the stage monitor speakers.

Typically the EQ2030, with its fine 1/3 octave adjustments would be used for

the monitors, although the EQ2015 could be used in situations where tone con-

trol, not feedback elimination, was the main objective. Both units are excel-

lent for optimizing the house PA system. Typically the EQ2015 is sufficient

for the PA mains, although in rooms with major EQ problems, the extra fine

tuning abilities of the EQ2030 may be necessary.

GUITAR & BASS AMPS

Guitar and bass players can benefit from the EQ2015 & EQ2030 by integrating

them into their rigs between the pre-amp and power amp interrupt jack for

extra tone control. Utilizing A/B boxes, the EQ’s can be used like extra chan-

nels for unlimited tonal flexibility.

MODEL EQ2030 SPECS:

Input Type: Balanced and unbalanced via male

and female XLR connector or 1/4”

phone jack

Input Impedance: 20 KΩ balanced

10 KΩ unbalanced

Maximum Input Level: +20 dBv balanced or unbalanced

Output Type: Balanced and unbalanced via male

XLR connector or 1/4” phone jack

Output Impedance: 600 Ω balanced

Maximum Output Level:

Unbalanced: +20 dBv (7.8 Vrms) into a 600 Ω

load or greater

Balanced: +26 dBv (15.6 Vrms) into a 600 Ω

load or greater

Input Gain Control: +6 dB to full attenuation

Boost Cut:

± 15 dB, +20 dBv into 600Ω

Center Frequencies:

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, 16 k

and 20k ± 5%

Filter Type: Active bandpass filters (no inductors)

Frequency Accuracy: ±5% of nominal center frequency

Frequency Response

(with all sliders centered):

±1 dB, 10 Hz to 45 kHz

Bandwidth (-3 dB points): 7 Hz -85 kHz

Harmonic Distortion:

<.01% THD, 20 Hz to 20 kHz

Noise (unweighted,

20 kHz bandwidth): 104 dB below full output

Slew Rate: 9 volts per microsecond

Power Requirements

US Model: 120 VAC, 60 Hz, 1/4 A, 5x20 fuse

Export Model: 230 VAC, 50 Hz, .125 A, 5x20 fuse

Package: 3 rack spaces

Dimensions:

19"W x 6"D x 5 1/4"H

Net Weight: 13 lbs.

76-20300 197

12340 World Trade Drive, San Diego, CA 92128

(800) 854-2235

www.carvin.com

HOME AUDIO

The EQ2015 & EQ2030 are excellent equalizers for home audio use. Their high-

end professional features and specs allow them to integrate easily into top qual-

ity home set-ups. The units can be connected to an open tape monitor loop on

an integrated pre-amp/amplifier or between the pre-amp and power amp in sys-

tems with separate components providing the ultimate control in your favorite lis-

tening room.

MICRO TOROID SUPPLY

Pure DC is generated from the built-in Micro Toroid power supply which features

precision 7815 and 7915 voltage regulators. Now you can go anywhere and never

have to worry about the EQ2015 & EQ2030 giving you their exact specifications

because voltage tolerances are held to within .001%.. The big feature in this power

supply is the precision wound Toroid transformer that gives unsurpassed rejection

of noise and hum. You can place the EQ2015 & EQ2030 over sensitive gear and

not be concerned about injecting hum or noise from a standard transformer. CARVIN

has spared no expense to achieve studio quality performance.

EQ2015

For your records, you may wish to record the following information.

Serial No._____________________ Invoice Date_______________

EQ2030

RECEIVING INSPECTION—read before getting started

INSPECT YOUR UNIT FOR ANY DAMAGE which may have occurred during shipping. If any

damage is found, please notify the shipping company and CARVIN immediately.

SAVE THE CARTON & ALL PACKING MATERIALS. In the event you have to re-ship your unit,

always use the original carton and packing material. This will provide the best possible protec-

tion during shipment. CARVIN and the shipping company are not liable for any damage caused

by improper packing.

SAVE YOUR INVOICE. It will be required for warranty service if needed in the future.

SHIPMENT SHORTAGE. If you find items missing, they may have been shipped separately.

Please allow several days for the rest of your order to arrive before inquiring.

RECORD THE SERIAL NUMBER on the enclosed warranty card or below on this manual

for your records. Keep your portion of the card and return the portion with your name and

comments to us.

EQ2015 DUAL 2/3 OCTAVE EQUALIZER

EQ2030 DUAL 1/3 OCTAVE EQUALIZER

Summary of content (6 pages)

PAGE 1
CARVIN ENGINEERING DATA EQ2015 DUAL 2/3 OCTAVE EQUALIZER EQ2030 DUAL 1/3 OCTAVE EQUALIZER OPERATING MANUAL RECEIVING INSPECTION—read before getting started EQ2015 EQ2030 The EQ2015 & EQ2030 are professional 2/3 and 1/3 octave graphic equalizers suitable for recording, sound reinforcement, guitar and bass rigs, or home audio applications. Both units feature pro sound performance from extended frequency response, wide dynamic range, and low noise operation.
PAGE 2
INTERFACE AND OPERATION An appropriate place to insert the EQ into the system is between the outputs of the mixer or monitor main and the inputs of the power amplifier. In addition to using the EQ2015 & EQ2030 to equalize loudspeaker frequency response, the units can be used as a program equalizer on individual channels or subgroups to establish optimum tonal balance. In the latter case the EQ would be patched into the appropriate channel or subgroup at the console.
PAGE 3
USING THE EQ2015 & EQ2030 Comments on using 2/3 & 1/3 octave equalizers to establish a flat frequency response. A 1/3 or 2/3 octave Equalizer provides the capability to make very fine corrections to the frequency response of an audio r system. There is no question about that. However, many users of such equalizers have only a vague idea of how to actually achieve an accurate frequency response using a 1/3 or 2/3 octave equalizer.
PAGE 4
FRONT & REAR PANEL CONTROLS 1 1 2 2 4 4 6 5 6 5 7 3 4 6 5 7 3 9 8 11 10 12 7 9 8 11 10 12 FRONT PANEL REAR PANEL 1. PEAK OVERLOAD LED The red PEAK LED lights any time the signal level at any stage (input/output) comes within 6db of clipping (distortion). It is okay for the LED to light briefly at musical peaks, however if it flashes frequently or stays lit, reduce the input gain until this stops. 7. AC POWER CORD & MAIN POWER FUSE Always use grounded (3 prong) outlets.
PAGE 5
This symbol is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
PAGE 6
REPLACEMENT PARTS LIST FOR EQ2030 EQ2030 Assembly: 80-20300 Rev (B) PCB: 30-20300 Rev (A) Ref. Des.