PRESONUS DEQ-624 – DIGITAL STEREO GRAPHIC EQUALISER w-DYNAMICS

The DEQ624 is a new direction for two channel/stereo graphic equalizers. Although
equalization is the main function, it provides many more benefits. The DEQ624 is a
digital processing unit, under digital control but with a familiar analog feel; no menus
or sub-menus to slow you down on the gig. The DEQ624 incorporates a separate hi-pass
and lo-pass filter for each channel for use in dialing in or out a certain range of frequencies.
There is a narrow Q select that gives more precise control over the frequency being attenuated,
without affecting adjacent frequencies. Metering is via 22-segment board-mounted LED's
that show output gain as well as a 9-segment LED for gain reduction on each channel.
There is a switchable Range control that changes the cut/boost of individual frequencies
over three different scenarios; +6 dB to -6dB, +12dB to - 12dB or +12 dB to - 24dB. The
Channel-A Master button copies Channel-A settings to Channel-B, eliminating the need to
manually set both channels in a live stereo situation. The DEQ624 provides a Security Lock-
out Feature and enables the user to define and store four preset EQ curves for the venues
or programs where the DEQ624 is most used. Presonus has developed a proprietary 60-cycle
hum cancellation algorithm, which is deemed AHC for 'Adaptive Hum Cancellation'. The
AHC circuit is the only one of its kind to be used in an audio system and should be worth
the price of admission for many live venues where ground-loops and poorly designed systems
are common. Each channel on the DEQ624 has its own compressor/limiter with Threshold
control for system and listener protection from harsh peaks and transients. The DEQ624 includes
a separate expander for each channel that gives the user control over Threshold and Ratio, which
provides for system noise to be minimized when idle. The rear panel of the DEQ624 provides for XLR
Balanced in an out as well as barrier-strip terminals for permanent installation. The power supply is
internal and the chassis is custom molded extruded aluminum and steel.  

 Features
? Analog Feel with 24Bit DSP
? Two 31-Band Equalizers
? 74 High Resolution Digital Encoders
? Variable Hi-Pass and Lo-Pass Filters
? Transparent Multistage Limiting
? Seamless Noise Reduction via Downward Expander
? Hi-Q can be selected for any frequency (1/8th Octave Narrow Notch)
? Selectable Ranges: +/- 6dB , +/-12dB , +12/-24dB
? Relay Bypass
? Metering via 22 Segment LED?s that show output gain as well as 9-segment
   LED for gain reduction for each channel
? Channel-A Master button copies settings to Channel-B, eliminating the need to
   manually set both channels in a live stereo situation
? Security Lockout feature disables front panel encoders
? Snapshot storage and recall of four programs
? AHC Proprietary Digital Algorithm adaptively detects and removes system
   hum up to the 24th harmonic
? Rear panel of the DEQ624 provides for XLR and TRS Balanced I/O as well as
   barrier-strip terminals for permanent installation
 
Technical Specifications:
Number of Channels Two
Dynamic Range >105dB
Noise Floor -95dBu
Signal to Noise >90dB
Power Supply Rejection >98dB
Headroom +22dBu
Frequency Response +/- 0.5dB 10Hz to 22kHz
Channel Gain -20dB to +20dB
THD + Noise (Unweighted) 0.005%
Input
Input Impedance 12KW
Input Connectors 51W XLR,1/4" TRS, and Barrier Strip
Output
Output Impedance 51W
Output Connectors XLR,1/4“TRS, and Barrier Strip
Metering
Level Meters 20-Segment LED -42dBu to +22 dBu
Gain Reduction 10-Segment LED -0.5dB to -12 dB
Power Supply
Type Linear
Input 115 / 230V AC (Factory Configured)
Power 20 Watts
Main Connection IEC receptacle
Size 2U Rack
Dimensions 19" W x 9" D x 3.5" H
Weight 14 lbs./ 6.35 kg.
Chassis Steel/Aluminum
 

* 2 channel 15 2/3 octave band graphic equalizer
* 25Hz - 16kHz frequency control * Constant Q circuitry
(3% frequency accuracy) * Selectable 6dB or 12dB control
* Variable level control * By-pass switch * Overload threshold LED (5dB below clipping) * Ground lift switch * XLR & 1/4" TRS balanced Inputs/Outputs * Power: Selectable 120V/220V voltage
* Dimensions: 1.75" H x 19" W x x 8.5" D / 44.5mm x 483mm x 216mm - 1 space r.m. * Weight: 4.5 lbs. / 2.5kg

XEQ-152 Specifactions:
* Input type: Active balanced / Unbalanced * Output Impedance:

• Audiophile 31-band stereo graphic equalizer for live and studio applications
• Revolutionary FBQ Feedback Detection system instantly reveals critical frequencies and can also be used as audio analyzer
• Ultra-low noise 4580 operational amplifiers for highest signal integrity
• Dedicated Limiters with gain reduction meters for each channel protect your sound system from overload and distortion
• Pink noise generator provides test signals to adapt your sound system to any room acoustics
• Mono subwoofer output with dedicated level control and adjustable crossover frequency
• Additional sweepable high and low-cut filters for each channel remove unwanted frequencies e.g. floor rumble, hiss etc.

• Highly accurate 8-segment LED input/output metering and input gain controls for easy level setting
• Relay-controlled hard bypass with an auto-bypass function during power failure (fail-safe relay)
• Servo-balanced inputs and outputs with 1/4" TRS and gold-plated XLR connectors
• “Planet Earth" switching power supply for maximum flexibility (100
  - 240 V~), noise-free audio, superior transient response plus low power consumption for energy saving

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).

• 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

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: