Chủ Nhật, 12 tháng 12, 2010

Graphic Equalizer

Graphic Equalizer REAL (USA) - EQ-231D

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Model: EQ-231D

Nhãn hiệu: REAL

■ 31 + 31 bands cho phép tinh chỉnh tần số mịn, độ nhạy cao, chất tiếng trong sáng
■ Led hiển thị tần số tín hiệu âm thanh (dễ dàng nhận tần số âm thanh đang hoạt động chính xác, nhanh chóng căn chỉnh, đặc biệt hiệu qủa xác định tần số gây hú & xử lý rất nhanh chóng hiệu qủa)
■ Chất lượng tiếng rất trong sáng, đáp ứng rất tốt các chương trình sân khấu biểu diễn chuyên nghiệp
■ S/N:95dB (Tỷ số tín hiệu trên nhiễu - thông số tốt)
■ THD+Noise:<0.01% (Độ méo & nhiễu thấp)
■ Tần số đáp ứng rất tốt :<10Hz to >20kHz, +/-0.5dB
■ Độ chính xác tần số trung tâm: :>90% (rất cao - tốt)
■ Bộ lọc nhóm tần số cao: HPF 3kHz-20kHz, nhóm tần số thấp LPF 40Hz-400Hz, độ dốc cắt tần số 18dB/Octave (tốt)
■ Mức tăng / giảm tín hiệu âm thanh tổng sau khi lọc tốt đa: +/-15dB
■ Dải động:118dB (rất tốt)
■ Hiển thị: Power, Output VU, Output Clip, Feedback

Bộ lọc tần số - MATRIX (USA) - 2231

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Model: 2231

Nhãn hiệu: MAXTRIX

2231 Dual 31-Band Graphic Equalizer

· Revolutionary instant encode/decode Type III® Noise Reduction in-circuit at the push of a button. Increases S/N ratio by up to 20dB

· Patent-pending PeakPlus™ Limiter threshold range from 0dBu to +24dBu (off) can transparently tame the wildest hits or the subtlest nuances of any signal

· Four segment LED bargraph for BOTH Gain Reduction AND Output Level

· Status LEDs offer visual feedback for all settings on the front panel


Connectors: 1/4" TRS, female XLR (pin 2 hot), and barrier terminal strip

Type: Electronically balanced/unbalanced, RF filtered

Impedance: Balanced 40k ohm, unbalanced 20k ohm

Max Input Level: >+21dBu balanced or unbalanced

CMRR: >40dB, typically >55dB at 1kHz


Connectors: 1/4" TRS, male XLR (pin 2 hot), and barrier terminal strip

Type: Impedance-balanaced/unbalanced, RF filtered

Impedance: Balanced 200 ohm, unbalanced 100 ohm

Max Output Level: >+21dBu balanced/unbalanced into 2k or greater

>+20dBm balanced/unbalanced (into 600)


Bandwidth: 20Hz to 20kHz, +/-0.5dB

Frequency Response: <10Hz to >50kHz, +0.5/-3dB

Noise Reduction In: (+/-6 and +/-12dB range):

Signal-to-Noise: >102dB, unweighted, ref: +4dBu, 22kHz measurement bandwidth

Dynamic Range: >120dB, unweighted

Noise Reduction Out: (+/-6dB range):

Signal-to-Noise: >94dB, unweighted, ref: +4dBu, 22kHz measurment bandwidth

Dynamic Range: >112dB, unweighted

Noise Reduction Out: (+/-12dB range):

Signal-to-Noise: >90dB, unweighted, ref: +4dBu, 22kHz measurement bandwidth

Dynamic Range: >108dB, unweighted

THD + Noise: <0.04%, 0.02% typical at +4dBu, 1kHz

Interchannel Crosstalk: <-80dB, 20Hz to 20kHz

Noise Reduction: Up to 20dB of dynamic broadband noise reduction


Type III® NR: Activates dbx® Type III® Noise Reduction

EQ Bypass: Bypasses the Graphic Equalizer section in the signal path

Low Cut (recessed): Activates the 40Hz 18dB/octave Bessel high-pass filter

Range (recessed): Selects either +/- 6dB or +/-15dB slider boost/cut range


Output Level Meter: 4-LED bar graph (Green, Green, Yellow, Red) at -10, 0, +10, and +18dBu

Gain Reduction Meter: 4-LED bar graph (all Red) at 0, 3, 6, and 10dB

Type III® NR Active: Yellow LED

EQ Bypass: Red LED

Clip: Red LED

Low Cut Active: Red LED

+/-6dB range: Yellow LED

+/-12dB range: Red LED


Operating Voltage: 100VAC 50/60Hz, 120VAC 60Hz

230VAC 50/60Hz

Power consumption: 23W

Main Connection: IEC receptacle


Dimensions: 5.25" H X 19" W X 7.9" D (8.9cm x 48.3cm x 20.1cm)

Note: Specifications subject to change without notice.

Graphic Equalizer - BSS (UK) - FCS-960

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Model: FCS-960

Nhãn hiệu: BSS

FCS-960 Dual Channel/Mode Graphic EQ

The FCS-960 is a 30-band graphic equaliser featuring Dual Mode switching between Normal and Fine filter width settings on each channel.

The FCS-960 provides two channels in 3U of rack space. Constant Q-filters with filter-bypass centre taps are controlled by high grade, 45mm faders with moulded polymer fader knobs which eliminate visual parallax error even under low light conditions.

Also included are sweepable/switchable Hi-pass filter, Gain control and electronic balanced inputs and outputs.

Input Section


10kOhm, Electronically Balanced

Max. Input Level



XLR331 or equivalent

Output Section


Electronically Balanced & floating

Max. Output Level

+20dBu into 600 Ohms


XLR332 or equivalent

System Performance

Frequency Response

+/0.25dB 20Hz to 20kHz

Distortion (THD)

<0.005% 20Hz to 20kHz @+4dBu

Output Noise (flat)

<90dBu, 22Hz to 22kHz, unweighted

Channel Separation

Better than 80dB from 20Hz to 20kHz

Gain Control Range


Peak Indicator



Passive failsafe bypass relay



MFB Constant Q

Frequencies Per Channel

30 off, on 1/3 octave ISO centres, 25Hz to 20kHz

Boost/Cut Range

Nominal +/10dB *


Selectable normal or fine response

High Pass Filter

18dB/octave Butterworth, 20Hz to 250Hz


Power Requirements

AC 30VA 50/60Hz, selectable 90/120v or 190/250v. IEC AC power cord.


3U 19 " x 5.25" x 8.9" (482mmx132mmx227mm)


11lbs gross shipping (6kg)


Transformer Balancing (Input and Output)

Security Cover (2U, 3U)


Graphic Equalizer - XTA (ENGLAND) - Dual 30 Bands - GQ-600

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Model: GQ-600

Nhãn hiệu: XTA

GQ600 Features
H.F Trim section with adjustable gain and frequency allows fast adjustments to be made to overall H.F response. This obviates the need for system re-voicing when, for example, changes in humidity or audience size occur.

Filter design is carefully optimised for good interpolation and improved narrow band performance.

Excellent noise and distortion performance.

High quality long throw 45mm sliders are used, improving resolution whilst eliminating the need for range switching.

Sweepable high-pass filter is provided.Inputs and outputs are fully electronically balanced as standard.

A fixed frequency 18 dB/octave low-pass filter is provided for increasedH.F driver protection.

Both XLR and Klippon "quick-wire" connectors are provided.

Peak level indicators give prior warning of onset of clipping anywhere inthe equaliser.

Relay fail-safe bypass is provided, with turn-on delay.

Gain control and EQ in/out switch for each channel.

GQ 600Specifications
Inputs Two, electronically balanced [++]
Impedance > 10k ohms
CMRR > 65dB 50Hz - 10kHz
Outputs Two, electronically balanced [++]
Source Imp. < 60 ohms
Min. Load 600 ohms

Max. Level ± 23dBm into 600 ohm load
Gain ± 10dB via rotary control
Frequency Resp. ± 0.5dB 20Hz to 20kHz with controls "flat"

Eqv. Input Noise <- 100dBm (20Hz - 20kHz un-weighted) with controls "flat"
Distortion @ +18dBm< 0.01% @ 1kHz
Channel Separation > 80dB @ 1kHz

Peak Indicator Threshold: + 20dBu

H.F Trim
Filter Type 2nd order, optimum phase, shelving
Frequency 2K - 20kHz
Gain ± 8dB
H.F Trim In/Out Front panel switch with LED

High-pass Filter
Filter Type 12dB/octave H.P
Frequency (-3dB) 10Hz - 150Hz
Low-pass Filter
Filter Type 18dB/octave 3dB @ 27kHz
LPF In/Out Link selectable on PCB

Equaliser Section
Filters 2 x 301/3 octave, 25Hz-20kHz
Filter Type High performance simulated LCR network
Freq. Tolerance ± 3%
Range ± 10dB

Power 110/120 ± 15% @ 50/60Hz
Consumption < 20W

Weight 5.0 kG Net (6.7 kG Shipping)
Size 5.25" (3U) x 19" x 9.3" (133 x 482 x 237mm)
excluding connectors.

Options [++] = Optional transformer balancing.
Perspex security cover.

GQ 600 Architects Specifications
The dual channel equaliser shall contain 2 x 30 filters centred on 1/3 octave ISO centre frequencies from 25Hz to 20kHz. 10dB of boost and cut shall be provided for each filter via 45mm slide controls. The slide controls shall incorporate centre detent. A high frequency "Trim" section with shelving response shall be provided, allowing up to 8dB of boost or cut to be applied at any frequency 2kHz to 20kHz via rotary frequency and gain controls. The gain control shall incorporate centre detent.

The equaliser shall contain 12dB/octave high-pass filters for each channel with turnover frequencies variable between 10Hz and 150Hz. A fixed frequency 19dB/octave low-pass filter shall be provided to aid H.F driver protection. The unit shall provide a rotary gain control for each channel allowing ±10dB of gain to be applied. This control shall incorporate centre detent.

An EQ in/out switch shall be provided for each channel, allowing the 1/3 octave equaliser section to be selected in or out of circuit. A peak level indicator shall provide warning when signals above 20dB are detected.

Audio connections shall be provided via XLR and Klippon "quick wire" connectors. Inputs and outputs shall be electronically balanced with transformer balancing available to order. A security cover shall be available to cover all front panel controls. The unit shall include Bypass relays which automatically operate when power is interupted.

The equaliser shall meet or exceed the following performance specifications:
Frequency Response: ± 0.5dB 20Hz-20kHz (controls "flat")
Distortion: < 0.01% @ 18dBm @ 1kHz
Eqv. Input Noise: <- 100dB (20Hz-20kHz unweighted)
Maximum Output level: + 23dBm into 600 ohm load

The equaliser shall operate from a 110/220V ± 15% 50/60Hz supply and be housed in a standard 3U 19" rack mount case. The equaliser shall be the XTA Electronics GQ600.



Graphic Equalizer - DBX (USA) - IEQ31

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Model: IEQ31

Nhãn hiệu: DBX

Bộ lọc tần số - Graphic Equalizer

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