Transcript
Thank you for buying a Wharfedale WPG Series Pro Graphic Equalizer Unit. These units can be used with other Wharfedale Pro Units of which details can be obtained from your dealer. EVP Series of High Performance Loudspeakers WPG-202 Two channel Electronic Crossover • SE Series of Power Amplifiers Lix Series of High Performance Loudspeakers Action Series Mixers The information in this manual is subject to change without notice. All rights reserved © 1998 Wharfedale Pro, IAG group
WHARFEDALE website :
www.wharfedale.co.uk
LEVEL
HPF
20 EQ BYPASS IN
EQ RANGE
PHASE
31.5
40
50
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80
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125
160
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315
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400
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630
1K
800
1.2K
1.6K
2K
2.5K
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5K
4K
6.3K
8K
10K
12.5K
16K
20K
+6
6
2
NORMAL
12dB
25
+12
0
0 -12
10
+12 dB
200
PEAK SIGNAL
10
CHANNEL 1
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10
CHANNEL 2
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-12
-6
POWER
REVERSE
6dB
12dB 6dB RANGE
VOLUME
0
OUT
Hz
6
25
40
63
100
160
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400
630
1K
1.6K
2.5K
4K
6.3K
10K
12dB 6dB RANGE
16K
25
40
63
100
160
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630
1K
1.6K
2.5K
4K
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10K
16K
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-12
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BYPASS PEAK IN SIGNAL OUT
BYPASS IN OUT
CHANNEL 1
PEAK SIGNAL
0
POWER
CHANNEL 2
WPG SERIES PROFESSIONAL GRAPHIC EQUALIZERS WPG-331 (single channel) WPG-315 (dual channel)
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The WHARFEDALE Wireless Works was established in 1932 by Gilbert Briggs who soon established a reputation as one of the most innovative loudspeaker engineers of his generation. His company was at the leading edge of an exciting new technology which was dedicated to bringing the pleasure of music and entertainment into people’s homes. As the technology advanced Wharfedale gave many music lovers their first taste of High Fidelity, mounting a series of live sound demonstrations which excited the audio world and heralded the birth of the modern hi-fi loudspeaker. Today Wharfedale Pro takes the same uncompromising approach to the design and manufacturing of every audio product, using high-quality components and state-of-theart testing equipment to ensure consistency and high performance. At Wharfedale we design and build all of our products and we control all the variables, so that we don’t have to compromise our design goals. Wharfedale Pro WPG series of Graphic Equalizers are high quality units suitable for stage, club and studio use. Using proven circuitry they are straightforward to use, reliable in operation and capable of excellent performance.
Unpacking All Wharfedale Pro products are fully checked before leaving the factory. After unpacking please inspect contents for any physical damage. Please retain the shipping carton if possible and internal packing material in case the unit needs to be returned. Please check as soon as possible the unit is functioning correctly. In the event of any damage please contact your dealer immediately so that a written claim for damages can be made. Wharfedale Pro Limited Warranty Wharfedale Pro WPG Series graphic equalisers are warranted to be clear of defects in construction, materials and malfunction under normal operating conditions for a period of 3 years from the original date of purchase providing the unit has only been used for its intended purpose. Wharfedale will during the warranty, and at its own discretion, undertake to make repairs at no charge if the product has been delivered to Wharfedale Pro by a Wharfedale Dealer. Wharfedale exclude normal exterior wear to finish and cannot be held responsible for any system malfunction due to abuse or using the units beyond the limits and conditions as stated within the specified ratings. Wharfedale shall not be liable for any
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WPG - 331 Single channel Graphic equalizer l 31 bands of equalisation, Third Octave at standard ISO frequencies l Balanced inputs and outputs with XLR and jack connectors l Constant “Q” multi-feedback bandpass filter circuits l Very low THD and background noise levels l Signal level and Peak level LED indicators l Variable High-Pass Filter 10 Hz to 200Hz l Phase reverse switch l ± 6dB or ±12dB operating level switch l EQ Bypass switch WPG - 315 Two channel Graphic equalizer l As WPG-331 except 15 equalisation bands per channel and without high-pass filter
This warranty is only valid providing: i) Warranty applies to original purchaser only (warranty not transferable) ii) Warranty card must be filled in fully and returned to Wharfedale Pro within 30 days from date of purchase. Failure to do so will not affect your statutory rights. iv) Unit must be returned with original sales receipt or other proof of purchase. v) Unit is repaired by Wharfedale or authorised service agent only. These terms do not infringe your statutory rights.
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PLEASE READ THESE IMPORTANT INSTRUCTIONS BEFORE USING THE EQUALISER. SAFETY INSTRUCTIONS To reduce the risk of electric shock the user should not remove the cover. All operating and safety instructions should be followed. The unit should be kept clear of water, fluids and moisture and not be operated in damp conditions. The unit should be operated in a well ventilated environment. The unit should be kept away from excessive heat sources such as radiators and if racked with other power amplifiers there should be a free air flow to vent out the heat produced (check with dealer). This graphic equaliser must only be used with the Wharfedale external power unit provided.This power unit provides a 19 volt ac supply and its output cable must be plugged into the matching socket on the rear panel of the equaliser. This must be done BEFORE the power unit is plugged into the mains power supply. The power cable should be disconnected during prolonged non usage.The user should not attempt to service the unit or do anything to the unit in any way except those things described in this manual. For service and repair your dealer should be contacted. This unit complies with relevant safety regulations. POWER NOTICE FOR SAFETY All British and European countries have a nominal 230v mains power supply. In practice this varies between 220v and 240v. In the USA the main power supply is 115v and in Japan 100v. The power unit is factory set to the correct voltage and this can be checked by referring to the label on the unit. If the equaliser is used in a country having a different supply voltage then a new power unit will be required and you should consult your dealer. There are no user serviceable parts within the power unit or the equaliser and high voltages are present. DO NOT remove the covers! Ensure that all the audio connections are made before the mains supply is connected and switched on.
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4 1. Power switch, when depressed the power is switched on. 2. The Power LED illuminates when the power is on. 3. Equaliser sliders (WPG- 331). 31 bands of equaliser adjustment are provided at ISO 1/3 rd octave frequencies. 4. Equaliser sliders (WPG- 315). 15 bands of equaliser adjustment are provided for each channel at ISO 2/3 rd octave frequencies. 5. The Bypass switch bypasses the complete unit by linking the inputs directly to the outputs. 6. The Level switch enables the range of “boosting” or “cutting” to be ±6dB or ±12dB. “Boosting” a frequency band is achieved by moving a slider upwards towards the “+” end and this increases the level of the chosen frequency. “Cutting” a frequency band is achieved by moving a slider downwards towards the “-” end and this decreases the level of the chosen frequency. 7. The level rotary pot adjusts the sensitivity of the equalisers input stage by ±12dB. This allows an accurate level matching with a large range of sources. The maximum output is +22dBm. 8. The signal LED indicates the presence of a signal from an external source. 9. The peak LED indicates an output level that is reaching or exceeding +22dB level and so causing overload distortion. The signal level input then needs to be reduced. 10. The HPF rotary pot (only on the WPG-331) is a high pass filter that allows for a specific roll-off frequency to be selected. Useful for tuning in at certain frequency points and removing unwanted low frequency signals. 11. Phase normal/reverse switch (only on the WPG331) The switch inverts input signal by 180°. This enables correct phase matching.
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Description There are two models, the WPG-331 and the WPG-315 and they fit standard 1U, 19” (482mm) racks. These equalisers are housed in steel cases suitable for mounting in professional flight cases. Operating Equalisation is the adjustment of the frequency response of an audio system, regardless of level, to add or subtract level at particular frequencies for an improved sound. Graphic Equalizers have become an ideal tool for control over the total audio response. In most audio systems careful equalisation can make the difference between a poor and a superior sound quality. Before switching on the graphic equaliser ensure that all the audio inputs are connected and that the mains connections are safely and securely connected at the supply and at the power unit. All internal servicing must be referred to qualified service personnel with access to technical documentation but if the unit fails to work the user can apply a few basic checks to locate certain problems. i) If the Power LED is not on:Check that the power switch is set to on; that the power unit is plugged into the graphic equaliser and that the power unit is plugged into the mains supply. ii) If a system has been set up, and the graphic is thought not to be functioning, please check the system
XLR WIRING GROUND
+ HOT
2
1/4’ STEREO JACK WIRING TIP (+ HOT )
1 SLEEVE/GROUND
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- COLD
REAR PANEL DIAGRAM WPG 315
RING (- COLD)
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connections. If however, the system has already been working perfectly and the graphic is suspect, follow the basic fault finding procedure given. If this does not produce any results, contact your dealer, who will be able to solve the problem quickly. Most malfunctions can be traced to cable (input, output and mains) failure or to the connections. Each input channel is electronically balanced with one female XLR connector. In accordance with IEC and AES/ANSI standards the wiring mode is Pin 1 Ground, Pin 2 Hot and Pin 3 Cold. The 1/4” Jack socket is also wired in parallel with the XLR’s. The Tip is Hot, the ring is Cold and the Sleeve is Ground. Balanced Operation: Use only when driving from a true balanced source and driving to a true balanced destination. Either transformer balanced or with active drive. Connect the input between pins 2 and 3 with pin 2 positive. Do not connect pin 1. Attach the shield to connector case (chassis ground). Connect the output between pins 2 and 3 with pin 2 positive. Do not connect pin 1. Do not connect the shield at this end to anything. Unbalanced Operation: Connect the input between pins 2 and 1 with pin 2 positive and pin 1 earth (signal ground). Short pin 3 to pin 1. Attached the shield to connector case (chassis ground). Connect the output between pins 2 and 1 with pin 2 positive. Leave pin 3 open - Do not short it to pin 1. Do not connect the shield at this end to anything. Venue/room equalisation. The sound of any system will sound different and vary with each location. Each location will have different acoustic properties which will give it its own distinctive characteristic. This is due to the reflection and absorption rates of sound within the audio spectrum of different venues. Though your source material may be reasonably flat, the sound that is actually delivered to an audiences ears after reflection and absorption is not. Feedback control Sound system feedback (howling or squealing) occurs when the the sound waves originating at the speaker return to the microphone and are re-amplified causing the system to oscillate at its natural resonance frequency. Many of the effects of feedback - an unpredictable alteration of the frequency response with changes in system gain, an increase in reverberation time, and system instability giving rise to howl, can be reduced with
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equaliser use. There are three types of feedback, i) feedback paths direct from the speakers, ii) feedback from early reflections and iii) feedback from diffused reverberation.The simplest way to cure type (i) feedback is to re-direct the loudspeakers (front of house and monitors) away from the microphone(s) so that the signal picked up is too small to cause howl. Type (ii) feedback can be more difficult to control by speaker re-direction. Type (iii) feedback can be controlled by careful placement and some trial and error movements of the loudspeakers may cure this. This is nearly impossible at low frequency, since the aiming of an omni-directional frequency source (low,bass) is not possible These initial simple methods are not always successful. This is where the graphic equaliser can achieve beneficial, quick results. The feedback signal can be located and ‘notched’ out by locating the frequency that is most likely causing the howl and applying cut (reduction) of level at this frequency. Eventually the problem frequency(s) will be found and feedback cured. There may be feedback occurring at two or more
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frequencies. The same procedure will stop the feedback. By matching the feedback note with the notes on a keyboard or guitar and knowing the relationship of frequency with musical notes the howl can be matched and the band reduced, so if the howl matched the note ‘A’ you would reduce the slider 4.0 kHz as A = 4.40 kHz. Monitor Equalisation With amplified instruments on stage the monitor sound can become muddy and unintelligible. The equaliser can be inserted in between the mixer monitor output and the monitor amplifier and be used to tailor the sound of the monitor to cut through the onstage sound. Normally a suitable vocal sound will be obtained if the response above 3kHz and below 500Hz is rolled off. Shaping Equalisation (creative) This is where the the equaliser can be used either in the studio or on stage to emphasise a specific tonal quality of an instrument or sound source to create a new sound.
TYPICAL WIRING DIAGRAM FOR THE WPG - 315/331 SERIES CROSSOVER IN SYSTEM SETUP SIGNAL INPUT MIC, CD etc. TO MIXER
OUTPUTS FROM GRAPHIC EQUALISERTO CROSSOVER
MIXER OUTPUT
INPUT TO GRAPHIC EQUALISER
SEPARATE HIGH/MID AND LOW OUTPUTS TO AMPLIFIER(S) FROM CROSSOVER
INPUTS TO CROSSOVER
SEPARATE HIGH/MID SPEAKER OUTPUT TO HIGH/MID SPEAKER FROM AMPLIFIER
INPUTS TO AMPLIFIER(S)
SEPARATE LOW SPEAKER OUTPUT TO LOW FREQUENCY SPEAKER FROM AMPLIFIER
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FREQUENCY RESPONSE: THD: SIGNAL TO NOISE RATIO (ref. +20dBm): FILTER FREQUENCIES: WPG315 FILTER FREQUENCIES: WPG331
MAXIMUM BOOST AND CUT GAIN: LEVEL CONTROL RANGE: INPUT IMPEDANCE: OUTPUT IMPEDANCE: MAX OUTPUT LEVEL: MAX INPUT LEVEL: HIGH PASS FILTER RANGE: WPG331 POWER CONSUMPTION: POWER: DIMENSIONS: WEIGHT:
(HEIGHT • WIDTH • DEPTH)
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10Hz - 30kHz ± 1dB < 0.03% 20-20kHz 114dB 25Hz, 40Hz, 63Hz, 100Hz, 160Hz, 250Hz, 400Hz, 630Hz, 1kHz, 1.6kHz, 2.5kHz, 4kHz, 6.3kHz, 10kHz, 16kHz 20Hz, 25Hz, 31.5Hz, 40Hz, 50Hz, 63Hz, 80Hz, 100Hz, 125Hz, 160Hz, 200Hz, 250Hz, 315Hz, 400Hz, 500Hz, 630Hz, 800Hz,1kHz, 1.2kHz, 1.6kHz, 2kHz, 2.5kHz, 3.1kHz,4kHz, 5kHz, 6.3kHz, 8kHz, 10kHz, 12kHz, 16kHz, 20kHz ± 12dB ± 12dB 10K ohm (BALANCED) <600 ohms (BALANCED) +22dBm (BALANCED) • +22dBm (UNBALANCED) +22dBm (BALANCED) • +22dBm (UNBALANCED) 10~200Hz 18dB/Octave 12 WATTS 95V~130 VOLTS AC, 50 - 60HZ 190V~ 250 VOLTS AC, 50 - 60HZ 483 x 160 x 44 mm / 19 x 6.3 x 1.7 inches 3Kg (6lbs)
POWER SUPPLY FOR WPG SERIES GRAPHIC EQUALISERS. UK DISRIBUTED UNITS COME WITH FITTED MAINS PLUG, 250V 13 AMP, BS1363/A I.S.40/A
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BALANCED INPUT WIRING TO WHARFEDALE PRO UNIT WITH XLR CONNECTORS BALANCED OUTPUT
INPUT to Wharfedale Pro unit SIGNAL DIRECTION
2
1
1 Ground (earth)
CABLE
2
Only connect ground if hum occurs
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+
BALANCED INPUT WIRING TO WHARFEDALE PRO UNIT WITH 1/4" JACK to XLR CONNECTORS INPUT to Wharfedale Pro unit BALANCED OUTPUT
SIGNAL DIRECTION
RING
1
TIP SLEEVE Ground (earth)
CABLE
2
Only connect ground if hum occurs
3 +
+
BALANCED INPUT WIRING TO WHARFEDALE PRO UNIT WITH STEREO 1/4" JACK to XLR CONNECTORS
BALANCED OUTPUT
SIGNAL DIRECTION INPUT to Wharfedale Pro unit
RING
SLEEVE
TIP RING
TIP SLEEVE Ground (earth)
CABLE
Only connect ground if hum occurs
+
+
BALANCED INPUT WIRING TO WHARFEDALE PRO UNIT WITH XLR CONNECTORS to STEREO 1/4" JACK BALANCED OUTPUT
INPUT to Wharfedale Pro unit
SIGNAL DIRECTION
SLEEVE
2
TIP
1 Ground (earth)
CABLE
Only connect ground if hum occurs
3
RING
+
+
UNBALANCED INPUT AND OUTPUT WIRING WITH MONO 1/4" JACK CONNECTIONS OUTPUT
SIGNAL DIRECTION
INPUT to Wharfedale Pro unit
OUTPUT Wharfedale Pro unit
SIGNAL DIRECTION
INPUT SLEEVE
TIP
TIP SLEEVE Ground (earth)
CABLE
+
+
BALANCED OUTPUT WIRING FROM WHARFEDALE PRO UNIT WITH XLR CONNECTORS TO BALANCED UNIT OUTPUT from Wharfedale Pro unit
BALANCED INPUT SIGNAL DIRECTION
2
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A great deal of mistakes in sound installations can be down to wrongly wired audio connections. It is important that the connections are correct to suit your system. Unbalanced System An unbalanced audio system is typically a single conductor shielded with the centre conductor relaying the signal and the shield at ground. Balanced System Using a balanced audio system is where a two conductor shielded cable has each of the two centre conductors carrying the signal but of opposite phase. This gives each conductor an equal but inverted potential difference from that of the ground. It is recommend that you use balanced audio connections if the unit before your graphic equaliser has a balanced output. This will eliminate interference such as mains hum. For the best results common grounding should be avoided. This means not connecting the ground on both the graphic equaliser input and output connectors. Wharfedale Pro advise that you connect the ground (shield) of the input connecting cable to the ground of the signal source while making sure the ground (shield) is not connected to the graphic equaliser input connector. The output cable connector from the graphic equaliser if connecting to another unit should have the ground (shield) connected. The input connector ground (shield) to the following unit should not be connected. This is the process by which the ground (shield) is connected (tied) at the source unit but is not connected to the destination unit. If hum develops in some instances the ground (shield) can be connected on the input. Some manufacturers have units that recommend that the input connector ground (shield) is tied and the output disconnected. In this instance you may need to connect the input connector ground (shield) going to the input of the Wharfedale Pro unit. If an unbalanced system is used with XLR connections please connect pin 3 to pin 1 (ground) of the connector. This will mean that pin 2 transports the positive (+ / hot) signal. If pin 1 and 3 are not connected this results in the negative (- / cold) input being ‘open’. This will give an audible degradation of the signal to noise ratio. This would relate to both the input and output connectors and involve the cable ground (shield) connected at both. Please note that some manufacturers run their units with pin 2 (- / cold) and pin 3 (+ / hot). This should be looked out for and then the wiring could be modified with labelled cables so that connections of + / hot go to their corresponding + / hot etc. Some manufacturers run their units with balanced inputs and unbalanced outputs , therefore care should be taken with the connections when
