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HQ31 - Pro Single 31 Band EQ w/ FDC? Overview
The HQ SERIES HQ-31 features ART?s FDC Feedback Detection Circuitry. The A R T proprietary FDC differs from similar systems in that it is extremely fast. Although it illuminates the band with the greatest energy with the brightest LED, it doesn't fully discriminate between bands and will not get "stuck" on one band when there is no signal. The HQ-31 utilizes a set of indicators that show which of the many EQ bands has the greatest energy. The LED indicators can immediately show which band corresponds to the feedback frequency, allowing the sound engineer to reduce gain in that band to quickly kill the feedback while having a minimal impact on the sound of the live program material. FDC also acts as a simple spectrum viewer while the concert proceeds showing where the ?hot? areas are. During system setup and sound check, the FDC may be used to help identify room and sound system resonances. By increasing the gain until feedback, it is easy to identify those frequencies that are likely to be problems. Reducing the gain in these bands helps tune the sound system, and, remove problem areas before the show begins. It also helps increase the gain margin before feedback. The HQ31 also features Constant-Q circuitry, 45mm center detent sliders with selectable boost or cut range of 6dB or 12dB, balanced XLR, Ό? and unbalanced RCA input and output connections, high and low pass filters, analog level metering, variable input controls, signal clip level indicators, ground lift switch, internal power supply and selectable line voltage. The rugged, all-steel chassis occupies 2U rack spaces and is intended for installation into standard 19? equipment racks. Applications for the HQ-31 include: Live Sound Systems/PA, Permanent or Fixed Installations, Church, Club and Practice PA Systems, DJ Sound Systems, Home and Project Recording Systems, and Monitor Systems.
HQ31 - Pro Single 31 Band EQ w/ FDC? Features:
FDC? Feedback Detection Circuit Single Channel 31-Band Graphic Equalizer Output Level VU Metering on Each Channel Constant-Q Filtering Individual High and Low pass filters Full 45mm Center-Detented Frequency Band Sliders Independent Level and Bypass Controls on Each Channel Relay Bypass - If Power is Lost, Signal Will Still Pass Occupies 2 Rack Spaces Variable Input Controls Signal Clip Level Indicators Ground Lift Switch Internal Power Supply Selectable Line Voltage |
DBX 2215 Dual 15-Band Graphic Equalizer with Noise Reduction
It's amazing. One little button. So much effect. dbx? Type III? Noise Reduction is an entirely new concept... virtually instantaneous encode/decode within the circuitry of the box. We started out to build the finest EQs possible, boxes with the heritage and performance to rival our famous 30 Series EQs. And to no one's surprise they came out awfully darn good. (Ask to see the Audio Precision plots compared to the competition.) But then, Roger (our chief engineer, a nice guy, as far as engineers go) got the crazy idea of putting this new noise reduction stuff in the box. We listened to it and were amazed. The EQs sounded great without it but with it the performance was nothing short of incredible. Check it out yourself and see.
But hey, Roger wasn't about to stop there. PeakPlus? Limiter. Who knows more about limiting than the folks at dbx; nobody... that's who. So when the guys were developing this new series of EQs they wanted something that would be unique to these EQs. That's when Roger got another one of his bright ideas and said "I bet they'll work a lot better if there's a cool limiter built in." Next thing you know, all the guys are in the studio amazed at the new limiter Roger had designed specially for the 20 Series. Once again, hearing is believing... With a threshold range of 0dbu to plus 20dbu, the patent-pending PeakPlus limiter is designed to tame your program material from the subtlest nuances to the rowdiest hits. Also, the four stage LED ladder gives you a great visual indication as to what the limiter is doing.
20 Series EQs. You used to have to settle for second best in a reasonably priced EQ but not any more. With the new 20 Series from dbx Professional Products you get a great EQ circuit, a graceful yet powerful limiter and the revolutionary new design of the Type III Noise Reduction. Check out the dbx 20 Series graphic EQs at your pro audio outfitter. You'll see, with the 20 Series EQs you get MORE!!!
SPECIFICATIONS:
INPUT
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Connectors:
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1/4" TRS, female XLR (pin 2 hot), and barrier terminal strip
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Type:
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Electronically balanced/unbalanced, RF filtered
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Impedance:
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Balanced 40k ohm, unbalanced 20k ohm
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Max Input Level:
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>+21dBu balanced or unbalanced
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CMRR:
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>40dB, typically >55dB at 1kHz
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OUTPUTS
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Connectors:
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1/4" TRS, male XLR (pin 2 hot), and barrier terminal strip
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Type:
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Impedance-balanaced/unbalanced, RF filtered
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Impedance:
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Balanced 200 ohm, unbalanced 100 ohm
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Max Output Level:
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>+21dBu balanced/unbalanced into 2k or greater
>+18dBm balanced/unbalanced (into 600)
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SYSTEM PERFORMANCE
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Bandwidth:
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20Hz to 20kHz, +/-0.5dB
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Frequency Response:
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50kHz, +0.5/-3dB
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Noise Reduction In:
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(+/-6 and +/-15dB range):
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Signal-to-Noise:
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>102dB, unweighted, ref: +4dBu, 22kHz measurement bandwidth
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Dynamic Range:
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>120dB, unweighted
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Noise Reduction Out:
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(+/-6dB range):
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Signal-to-Noise:
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>94dB, unweighted, ref: +4dBu, 22kHz measurment bandwidth
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Dynamic Range:
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>112dB, unweighted
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Noise Reduction Out:
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(+/-15dB range):
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Signal-to-Noise:
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>90dB, unweighted, ref: +4dBu, 22kHz measurement bandwidth
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Dynamic Range:
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>108dB, unweighted
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THD + Noise:
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INPUT
Connectors: 1/4" TRS, female XLR (pin 2 hot)
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
OUTPUTS
Connectors: 1/4" TRS, male XLR (pin 2 hot)
Type: Impedance-balanaced/unbalanced, RF filtered
Impedance: Balanced 100 ohm, unbalanced 50 ohm
Max Output Level: >+21dBu balanced/unbalanced into 2k ohm or greater
>+18dBm balanced/unbalanced (into 600 ohm)
SYSTEM PERFORMANCE
Bandwidth: 20Hz to 20kHz, +0.5/-1dB
Frequency Response: 50kHz, +0.5/-3dB
Dynamic Range: Typically >112dB
Signal-to-Noise: Typically >95dB
THD+Noise: |
The class-A circuit used in the EQ-73 is similar to the eq section in the classical 1073 module, without the high pass filter. Additional frequencies have been added and the mid frequency band uses two inductors, the higher value of the second one is used for the two lowest frequencies, 160 Hz and 240 Hz, to achieve a suitable response.
The sound character is warm, punchy, sweet and musical. These classic characteristics have been heard on countless recordings through the years and it is a versatile sound that works very well on most sound sources and in most genres. The essence of this sound is now available at a surprisingly low cost, making it available to nearly everyone.
The EQ-73 has stepped frequency controls that offers a wide selection of frequencies from 20 Hz to 24 kHz.
The Low and High frequency bands are shelving and the mid frequency band is of the bell type.
The control range is +/-15 dB for the two lower bands and +/- 18dB for the high frequency band.
There are separate bypass switches for all three bands.
The EQ-73 is made to be used together with one of our PRE-73 models that has an Insert jack. It can also be used with many other units that has a low level insert jack.
Combining a PRE-73 and an EQ-73, and using a UNITE rack kit to mount them together, one will get a 19-inch 1073-style unit at a low cost and with a great sound!
FEATURES
- Vintage Style electronics. No intergrated circuits in the signal path
- 3-band with a dual inductor based mid frequency band
- Stepped frequency selection
- A wide selection of frequencies from 20 Hz to 24 kHz
- Control range up to +/- 18 dB
- Separate Bypass switches for each band
- Tantalum capacitors in the signal path
- Made to be used together with one of our PRE-73 models with an Insert jack or any other unit with a low level Insert jack
- TRS jack for in-and output connection, the nominal working level is around 18 dBu
- Selectable ground lift switch
- External power supply to avoid interaction with the audio circuits
- Great sound that suits most sound sources and genres
- A solid build quality that will last many years of normal use
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The Rane ME 15S 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 Raneʼs 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 ME 15S.)
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 ME 15S through mono 1/4" connectors (no ring connection).
Features - 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)
| Digital stereo active crossover with 4 inputs and 8 outputs, incl. software .
- Flexible routing configurations for all standard mono and stereo output operating modes
- 4 analog inputs and 8 analog outputs (XLR)
- Active frequency filter types (Bessel, Butterworth and Linkwitz-Riley) with slopes up to 24 dB/octave split up the audio signal into different frequency bands
- Incl. software editor (for PC and Mac) for remote control via computer through USB interface: store, transfer, and manage your presets
- Up to 30 user presets storable in the device via software
- 5 menu languages selectable (German, English, French, Spanish, Dutch)
- Alphanumeric LCD screen with 2 lines of 16 characters each
- Input sensitivity digitally adjustable
- Inputs and outputs with 4-digit LED level meter as well as clip and limit LED indicator
- Mute switch with LED indicator per output
- 7-band parametric EQ per output
- Up to 7 ms signal delay adjustable for the outputs
- Output limiter with adjustable limits and automatic attack and release settings as overload protection for your amplifying system
- Switchable phase
- Lock function for prevents undesired changes to settings
- Rack installation, 1 U
- Windows XP, Vista, 7, 10 and Mac OS X 10.5.8 and better
- Digital signal processor
- The device can be connected via USB to the PC in connection with DXO Software
The firmware can be updated via the PC connection
- (19") 48.3 cm rack installation 1 U
Power supply: |
100-240 V AC, 50/60 Hz
6 V DC 800 mA |
Power connection: |
Mains input via Coaxial power connector (M) power supply cord with AC adapter (provided) |
Frequency range: |
10 - 22000 Hz |
THD: |
<0,005 % at 1 kHz |
DSP: |
Digital signal processor |
Crossover frequency: |
20-20000 Hz |
Impedance: |
Input 10 kOhm
Output 50 Ohm |
Gain: |
Output: -50 dB to +12 dB |
Filter: |
Linkwitz-Riley; Butterworth; Bessel; 6db/oct; 12db/oct; 18db/oct; 24db/oct |
Delay: |
0 - 7 ms |
Dynamic range: |
Input: 114 dB
Output: 110 dB |
Sample rate: |
48 kHz |
Connections: |
Input: line via 4 x 3-pin XLR
Output: line via 8 x 3-pin XLR |
Max. level: |
Input: +22 dBu
Output: +9 dBu |
USB port: |
Typ B |
PC connect: |
DXO Software via USB, firmware can be updated |
Housing design: |
(19") 48.3 cm rack installation 1 U |
Dimensions: |
Width: 48,3 cm
Depth: 22,3 cm
Height: 4,45 cm |
Weight: |
1,90 kg |
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