DUAL CHANNEL 31 BAND EQUALIZER WITH 2231 TYPE III™ NOISE REDUCTION ® The dbx 12 Series were designed to meet the needs of the most demanding sound reinforcement environments, while offering the simplicity of straightforward controls. The 1215 provides standard features like dual channels, 15 2/3 octave bands, ISO frequency centers, +/-12 dB input gain range, and switchable 40Hz/18 dB per octave low-cut filters, but also includes other thoughtful features. These include 45 mm faders; selectable +/-6dB or +/-15dB boost/cut range for precise gain adjustments; XLR, barrier strip, and 1/4'' TRS connectors for installation ease; balanced inputs and outputs for quiet operation; and chassis/signal ground lift capabilities for quick hum isolation. The visionary design of the dbx 12 Series makes your job easier. The dbx 12 Series Equalizers were precision engineered to provide years of maintenance-free operation in any application. The magnetically isolated transformer, electronically balanced/unbalanced inputs and servo balanced/unbalanced outputs, RF-filtered inputs and outputs, and power-off hard-wire relay bypass with 2 second power up delay were steps our engineers took to ensure compatibility for all installations. Only the best components were utilized, yielding a 10Hz to 50kHz frequency response, greater than 90dB SNR (ref +4dBu), less than 0.005% THD +Noise (1kHz at +4dBu), and interchannel crosstalk of less than -80dB from 20Hz to 20kHz. All this attention to detail is contained in a 2U steel/aluminum chassis. It’s no wonder that dbx has been a leader in the industry for over 25 years. • Switchable Boost/Cut range between ±6dB and ±15dB • Electronically balanced/unbalanced inputs • Servo balanced/unbalanced outputs • RF filtered inputs and outputs • XLR, Barrier Strip, and 1/4" TRS connectors • -12dB/+12dB input gain range • 18dB/octave 40Hz Bessel low-cut filter • Chassis/signal ground lift capability • Internal power supply transformer 8760 S. Sandy Pkwy. Sandy, Utah 84070 • Power-off hardwire relay bypass with 2-second power-up delay Phone (801) 568-7660 Fax (801) 568-7662 Int’l Fax (801) 568-7583 customer@dbxpro.com http://www.dbxpro.com A Harman International Company 18-1778-A 07/99 25 40 63 100 160 250 400 630 1k 1.6k 2.5k 4k 6.3k 10k 16k 25 40 63 100 160 250 400 630 1k 1.6k 2.5k 4k 6.3k 10k 16k -10 0 +10 +18 -10 0 +10 +18 +6 +15 +6 +15 OUTPUT OUTPUT LEVEL (dBu) LEVEL (dBu) CLIP +/-15 CLIP +/-15 0 0 1215 +/-6 +/-6 0 0 0 0 Graphic Equalizer -12 +12 -12 +12 dB dB EQ INPUT LOW RANGE EQ INPUT LOW RANGE BYPASS GAIN CUT BYPASS GAIN CUT -6 -15 -6 -15 O 1215 DUAL CHANNEL 15 BAND EQUALIZER 25 40 63 100 160 250 400 630 1k 1.6k 2.5k 4k 6.3k 10k 16k 25 40 63 100 160 250 400 630 1k 1.6k 2.5k 4k 6.3k 10k 16k CHANNEL ONE CHANNEL TWO -10 0 +10 +18 -10 0 +10 +18 +6 +15 +6 +15 OUTPUT OUTPUT LEVEL (dBu) LEVEL (dBu) Dual Vacuum Tube Preamp CLIP +/-15 CLIP +/-15 0 0 586 1215 +/-6 +/-6 0 0 0 0 Graphic Equalizer -12 +12 -12 +12 dB dB EQ INPUT LOW RANGE EQ INPUT LOW RANGE BYPASS GAIN CUT BYPASS GAIN CUT -6 -15 -6 -15 TYPE IV™ Conversion System 704 OUTPUT CHANNEL 1 INPUT CAUTION: T O REDUCE THE RISK OF FIRE REPLACE POWER RISK OF ELECTRIC SHOCK OUTPUT OUTPUT INPUT INPUT ONLY WITH SAME TYPE FUSE. DO NOT OPEN + - - + ATTENTION: UTILISER ATTENTION: RISQUE DE CHOC ELECTRIQUE - NE PA S OUVRIR UN FUSIBLE DE RECHANGE DE WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC MEME TYPE. SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE CONNECTOR POLARITY PHONE: XLR: TIP PIN 1 RING PIN 2 24 WATTS SLEEVE PIN 3 OUTPUT INPUT CHANNEL 2 OUTPUT INPUT PROFESSIONAL PRODUCTS OUTPUT INPUT A HARMAN INTERNATIONAL + - - + COMPANY MODEL 1215 MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING GRAPHIC EQUALIZER U.S. PATENTS: 4,234,804 4,316,107 4,329,598 4,331,931 4,377,792 4,403,199 4,409,500 4,425,551 4,434,380 4,454,433 4,471,324 4,473,793 OTHER PATENTS PENDING 100V 50/60Hz 120V 60Hz The graphic equalizer shall be a dual 15-band type with frequency centers Inputs Function Switches on standard ISO two-thirds octave frequencies ranging from 25Hz to Connectors: 1/4" TRS, female XLR (pin 2 EQ Bypass: Bypasses the graphic hot), and barrier terminal strip equalizer section in the signal 16kHz. The boost/cut ranges shall be switchable via recessed front panel Type: Electronically path switches to either +/-6dB or +/-15dB and the selected range shall be balanced/unbalanced, RF Low Cut (recessed): Activates the 40Hz indicated on the front panel by either of two LEDs per channel. Low-noise filtered 18dB/octave Bessel high- equalization sliders having a 45mm travel shall be utilized having center Impedance: Balanced 40kΩ, unbalanced pass filter 20kΩ Range (recessed): Selects either +/- 6dB or +/- detents at 0dB. The equalizer shall have front panel 41-detent rotary input Max Input Level: >+21dBu balanced or 15dB slider boost/cut range gain controls having a +/-12dB range. Bypassing the equalizer sections of unbalanced the signal path shall be accomplished via front-panel switches having CMRR: >40dB, typically >55dB at Indicators corresponding LEDs to indicate when each channel is bypassed. A 40Hz 1kHz Output Level: 4-LED bar graph (Green, low-cut Bessel filter per channel with 18dB/octave slope shall be insertable Outputs Green, Yellow, Red) at -10, 0, Connectors: 1/4" TRS, male XLR (pin 2 +10, and +18dBu in the signal path via front panel recessed switches with an LED to indicate hot), and barrier terminal strip EQ Bypass: 1 LED: red when the filter is active. Output levels shall be monitored on four-LED Type: Impedance- Clip: 1 LED: red peak-reading bar graphs calibrated to read -10, 0, +10, and +18dBu. balanced/unbalanced, RF Low Cut: 1 LED: red filtered +/-6dB: 1 LED: yellow Electronically balanced/unbalanced inputs shall include 1/4" TRS, female Impedance: Balanced 200Ω, unbalanced +/-15dB: 1 LED: red XLR, and screw terminal barrier strip, while servo-balanced/unbalanced 100Ω Max Output Level: >+21dBu Power Supply outputs shall include 1/4" TRS, male XLR, and screw terminal barrier strip balanced/unbalanced into Operating Voltage: 100VAC 50/60Hz, 120VAC shared with the input. A circuit/chassis ground lift jumper per channel shall 2kΩ or greater 60Hz, 230VAC 50/60Hz be strapped across circuit ground and chassis ground screw terminals and >+18dBm Power Consumption: 1215 24W; 1231 24W shall be removable by the user. Inputs shall be electronically balanced/unbalanced (into Mains Connection: IEC receptacle balanced/unbalanced and RF filtered having a nominal input impedance 600Ω) Physical not less than 40kΩ balanced and 20kΩ unbalanced, and shall accept System Performance Dimensions: 1215: 3.5" H X 19" W X 7.9" maximum signal levels of not less than +21dBu. Outputs shall be servo- Bandwidth: 20Hz to 20kHz, +0.5/-1dB D (8.9cm x 48.3cm x 20.1cm) balanced/unbalanced and RF filtered having a nominal output impedance Frequency Response: <10Hz to >50kHz, +0.5/-3dB 1231: 5.25" H X 19" W X of not more than 200Ω balanced and 100Ω unbalanced, and shall be 7.9" D (13.4cm x 48.3cm x +/-15dB range +/-6dB range 20.1cm) capable of driving not less than +21dBu into 2kΩ or greater and not less Weight: 1215: 8.5 lbs. than +20dBm (into 600Ω) continuously. Dynamic Range: 109db 115db 1231: 10.6 lbs. Signal-to-Noise: 90db 97db Shipping Weight: 1215: 9.5 lbs. Frequency response shall be better than 10Hz to 50kHz, +0.5/-3dB. Signal- THD+Noise: <0.005% 1231: 11.6 lbs. to-noise ratio shall be greater than 90dB, referenced to +4dBu. THD+Noise Interchannel Crosstalk: <-80dB, 20Hz to 20kHz Note: Specifications subject to change. shall be less than 0.005% with a 1kHz signal at +4dBu, while interchannel crosstalk shall be lower than -80dB from 20Hz to 20kHz. The internal power supply shall be constructed using a thermally-fused transformer mounted in a low hum orientation and shall be magnetically isolated from equalizer circuitry by means of a mu-metal shield. The power cord shall be detachable from an international standard IEC 320 power inlet receptacle. Unit shall be constructed to meet or exceed all applicable international safety and regulatory agencies. Domestic unit shall be powered from 100VAC 50/60Hz, 120VAC 60Hz, while international unit shall be powered from 230VAC 50/60Hz. Unit shall consume no more than 24W. Housing shall be of all steel/aluminum construction and shall be rack-mountable in an IEC standard 19" rack and shall occupy a 2U (3.5") rack space. The unit shall be a dbx 1215 Equalizer. FOR MORE INFORMATION CONTACT: dbx Professional Products dbx engineers are constantly working to improve the quality of our products. Specifications are, therefore subject to change 8760 S. Sandy Pkwy. without notice. Sandy, Utah 84070 Phone (801) 568-7660 Fax (801) 568-7662 ® Int’l Fax (801) 568-7583 customer@dbxpro.com http://www.dbxpro.com A Harman International Company