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Recent developments in sound measurement techniques have revealed the limitations
of existing graphic equalisers. The wealth of data that such equipment can provide for
the users requirements - feedback suppression, increased headroom, room equalisation/
compensation can no longer be adequately provided for with a simple graphic equaliser.
The Apex PE MKII is the solution, providing a tool which both enables maximum correction
whilst shaping the response to your specific requirements, combining a full graphic equaliser
with a complementary parametric equaliser/notch filter.
FEATURES:
Electronically balanced input with a balanced floating output stage.
All potential overload points are continuously monitored by an extremely fast "peak-peak"
overload detecter circuit, followed by a "peak-stretching" circuit for clear indication of overload
conditions.Reliablilty is the hallmark of any product, and the mechanical integrity of the components
housing is the vital prerequisite. Sophistical CAD programmes and advanced engineering concepts
have been applied to the chassis design to eliminate the stress and torsional movements which can
damage the electronics.Special attention has been given to the purity of the signal path.The musicality
of previous designs of Apex equalisers has been well appreciated by users, and the PE continues this
tradition, noise and distortion are significantly better than 16-bit digital.Fine-tuning your system is essential.
The "vernier control" provides adjustment refinement on an unprecedented scale.In the event of power failure
to the unit, a failsafe relay links the input to the output ensuring that signal continuity is maintained.
SPECIFICATIONS:
Input
Electronically balanced
Absolute overload point +22dBm
Impedance 10 kOhm (each leg), equal impedance for ?+? and ??? legs
CMRR Better than 65dB (20Hz-20kHz)
connectors XLR-3 type ( pin 1: signal ground, pin 2: hot ?+?, pin 3: cold ?-? )
Output
Electronically balanced and floating, simulating transformer output with app.
10kHom to ground impedance for each leg
Max level +21dBm into 600 Ohms
Impedance 51 Ohms (each leg)
Symmetry balance Better than 65dB (20Hz-20kHz IEC)
connectors XLR-3 type ( pin 1: signal ground, pin 2: hot ?+?, pin 3: cold ?-? )
Performance
Frequency response +0 ?0.5 dB, 40Hz-20kHz (graphic EQ in)
THD < 0.01%, 20Hz-20kHz
Noise < -94 dBm (typ. -98dBm), graphic and parametric equalisers in circuit (0dB settings)
Measurements: , 22Hz-22kHz RMS unweighted
Level Control -? to +6dB
Level control ?0dB? cal. accuracy +- 0.2 dB (overall gain input to output)
Overload indicator
Lights for approximately 200ms if the instantaneous peak voltage at any point in
the equaliser comes within 2dB of clipping
Filters
Graphic equaliser:
30 ISO center frequencies
25Hz to 20kHz 1/3 octave
Center frequency tolerance +-1% (typically better than +-0.5%)
Q tolerance+-1%
Max boost/cut 6 or 12dB +-0.5dB reciprocal
switchable
Parametric filters:
Tuning ranges 18-200Hz, 180Hz-2kHz, 1800Hz-20kHz
Vernier control+- 10% of main frequency control
Range of Q adjustment 0.5 to 8
Range of level adjustment
-? to +15dB (typ -45 to +15.5dB) non reciprocal. Smaller cut than boost curves
through addition and substraction of parametric bandpass filter output to filter input
Each filter individually switchable
High pass filter:
Frequency range 15-300Hz (-3dB frequencies)
Type
Maximally flat 12dB/oct
Switchable
Power Requirements
Voltage 110/120/220/240V 50/60Hz
Consumption 30VA
Connector IEC type
Size and weight
dimensions 482 x 133 x 255 mm (19 x 5.2 x 10 inch)
weight 7 kg
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- 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
| 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: Typicall >112dB
Signal-to-Noise: Typically >95dB
THD+Noise: |
The AD2055 combines 100% discrete, pure class A signal amplifiers with state-of-
the-art passive and active filter topologies. The AD2055's unique circuitry delivers
very high resolution transient detail at the operational extremes of real world equalization
demands. The AD2055 auto-bias DC servo loop control eliminates the need for all
interstage capacitor coupling. The AD2055 breathes life into all musical performances!
AD2055 FEATURES
Pure Class A, 100% discrete design
Smooth musical detail and sonic excellence
Minimum audio signal path
Dual mono operation
Transparent active and passive filter design
High headroom +30dB Very low noise -94dB
Fully balanced inputs and outputs
DC coupled, no transformers in audio path
Switched frequencies in high and low bands
Mid bands use X10 frequency for extended range
Wide bandwidth -3dB 1Hz to 450kHz
Low distortion less than 0.5% THD and IMD
All signal routing with sealed silver relays Conductive
plastic potentiometers for low noise
External 150W toroidal power supply 100% discrete
power supplies for audio path
Long lasting, stainless steel hardware
SONIC EXCELLENCE
The Avalon AD2055 Pure Class A music equalizer is the most powerful, low noise
parametric equalizer available today. Designed to optimize absolute signal integrity
and musical performance, the AD2055 combines the best of active and passive filter
topologies with sonic excellence unequaled by lesser designs. The AD2055 is the
perfect solution for two buss music-program equalization, special instrument EQ and
FX applications and ultra high performance mastering studio's.
Features include state-of-the-art, balanced 100% discrete, Pure Class A signal amplifiers,
practical user features and rugged hardware designed to deliver true high performance
audio for many years.
PASSIVE-ACTIVE FILTER DESIGN
Avalon equalizers feature the unique combination of both active and passive filter EQ designs.
This special combination enables the AD2055 to deliver high speed transient detail at the
operational extremes of real-world equalization demands. The passive high and low bands offer
alternate musical tone range to the full function active parametric mid bands. Passive equalizers
have long been a favorite with music lovers around the world. Full bodied, powerful (up to +/-32dB,
64dB range !) and sweet frequency selections are the benefits of the passive high-low EQ bands.
The full bandwidth twin mid bands provide variable frequency selection (X10 frequency multipliers
for very wide range), variable Q (width) and amplitude control.
MINIMUM SIGNAL PATH DESIGN
Avalon's advanced true symmetry design offers high-voltage, large headroom, extended bandwidth
and very low noise. The use of 100% discrete, Pure Class A signal amplifiers give the serious music
professional unlimited sonic character and a natural harmonic detail that enhances the program
material and becomes one with the music itself. The Avalon AD2055 breathes life!
AD2055 SPECIFICATIONS
Circuit Topology High-voltage 100% discrete, balanced and symmetrical
Class A
Output Gain Range Unity Gain
Maximum Input Level +30dB balanced XLR pin 2 hot
Maximum Output Level +32dB balanced 600 ohms, DC coupled, high-current
discrete Class A
Input / Output Type XLR type, pin 2 hot balanced
Noise 20kHz Unweighted -94dB (EQ in)
Distortion THD, IMD 0.5% (typical 0.05% at +6dB 1kHz)
Frequency Response -3dB 1Hz to 450kHz (input band limited)
Equalizer Type Passive high and low bands plus two fully parametric mid
bands
Bypass Hard-wire relay bypass for equalizer in-out
Low Band F1 Passive, amplitude to -32dB to +32dB shelf or peak-dip curve
F1 Frequency Range Switched 10 position 18Hz, 25, 30, 50, 72, 100, 150, 215,
300, 450Hz
Mid Band F2 Active, amplitude to -16dB to +16dB peak-dip curve
F2 Frequency Range Variable 35Hz to 450Hz (x10) 350Hz to 4k5Hz, Q (width)
0.3 to 3.0
Mid Band F3 Active, amplitude to -16dB to +16dB peak-dip curve
F3 Frequency Range Variable 160Hz to 2k0Hz (x10) 1k6Hz to 20kHz, Q (width)
0.3 to 3.0
High Band F4 Passive, amplitude to -26dB to +26dB shelf or peak-dip curve
F4 Frequency Range Switched 10 position 1k5Hz, 2k5, 3k5, 5k, 7k2, 10k, 12k5,
15k, 20k, 25kHz
AC-DC Power External AC supply, 150w toroidal transformer, 4 pin cable 90v
isolated,
(B2T Power Supply Included) 100-240v selectable 50/60Hz, 150w max
Dimensions 19 x 3.5 x 12 in (482 x 88 x 305mm)
Shipping weight 30lbs (13.6 kg)
| PRICE WITHOUT V.A.T.
BSS Opal FCS-966 Constant Q Graphic Eq
Graphic equalisers are found in just about every sound application, from room contouring to feedback control and general audio sweetening.
Traditionally, much general eq'ing takes place on the faders alone, but this restricts the use of the faders at each end of the scale for further precision eq work. So we provided the Opal FCS-966 with separate LF and HF contour filters which can change an overall sound balance without disturbing a detailed room or loudspeaker response.
These filters are very musical gentle boost and cut shelving filters which can be used to add (or remove) room effects that change with temperature, audience numbers or humidity.
All these effects can be easily made without disturbing the critical fader settings already made.
Constant Q Filters
The modern generation of graphic eq's
uses the Constant Q topology, pioneered by BSS Audio, which means that the filter width is constant whatever the fader gain setting.
Compared to the earlier 'gyrator' style of filters, Constant Q filters provide a smoother and more predictable interaction between adjacent faders and the resulting eq curve more closely resembles the actual fader positions.
More Gain Control Per Filter
Each eq fader has +/-15dB of adjustable gain, more than many competitive graphic eq's. The faders are long-throw 45mm types for precision control.
High Pass Filter
Also provided on the FCS-966 is a sweepable high-pass filter which can be used very effectively to restrict the low-energy output for better amplifier and loudspeaker performance. Stage monitors also benefit from the application of a high-pass filter to remove bass signals e.g. from vocal-only wedges.
Metering
BSS Audio believes in providing engineers with information, and the FCS-966's 8-segment led meter shows output level and warns of signal clipping within the eq. When the unit is switched to bypass, the meter will read the input level, allowing accurate matching of the 'dry' and equalised signals using the gain control.
Centre Bypass
When any eq fader is in its centre detent position, the filter is automatically bypassed, for optimum performance.
Input/Outputs
All the inputs and outputs of the FCS-966 are electronically balanced, with optional transformer balancing. To make installation of the FCS-966 easier, we've provided three differerent interface connectors: XLR-type, 1/4" TRS jack and Phoenix/Combicon screw terminals.
Relay Bypass
The EQ IN buttons switch the EQ path
into circuit. When switched out, or power fails, a high-quality relay switches the input signal directly to the output connectors.
Control Descriptions
Faders
30 EQ filter faders on ISO centres, each with nominal +/-15dB of gain. Positive centre-detent on 45mm long-throw precision faders.
HP Filter
Sweepable high pass filter, frequency adjustable from OUT (flat) up to 250Hz.
LF Contour
Smooth shelving filter, +/-6dB of gain at 50Hz
HF Contour
Smooth shelving filter, +/-6dB of gain at 14kHz.
GAIN
Used for overall unity gain adjustment. Adjustable from - infinity to +10dB.
CLIP
Triple-point clip detector that indicates red when the internal signal is clipping at any one of three critical points.
LED Meter
Shows output signal level (input signal when eq is bypassed) from -24dBu to +18dBu in 8 steps. | 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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