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Environmental precaution

EU Directive 2002/96/EC

Remark: This notice applies only to countries within the European Union 

(EU) and Norway

Electrical and electronic equipment may contain hazardous substances for 

humans and their environment.

The “crossed out wheelie bin” symbol present on the device and represen-

ted above is there to remind one of the obligation of selective collection of 

waste.  This label is applied to various products to indicate that the product 

is not to be thrown away as unsorted municipal waste.  At the end of life, 

dispose of this product by returning it to the point of sale or to your local 

municipal collection point for recycling of electric and electronic devices.

Customer participation is important to minimize the potential affects on the 

environment and human health that can result from hazardous substances 

that may be contained in this product.

Please, dispose of this product and its packaging in accordance with local 

and national disposal regulations including those governing the recovery 

and recycling of waste electrical and electronic equipment.  Contact your 

local waste administration, waste collection company or dealer.

Summary of Contents for dB Series

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Page 3: ...APEX NV Schoebroekstraat 62 3583 Beringen Paal BELGIUM Tel 32 0 11 28 61 91 Fax 32 0 11 25 56 38 email info apex audio be website www apex audio be...

Page 4: ...rown away as unsorted municipal waste At the end of life dispose of this product by returning it to the point of sale or to your local municipal collection point for recycling of electric and electron...

Page 5: ...ROWN PHASE LIVE ATTENTION This device must be grounded If these colours do not correspond with the symbols or colours you are using please follow the fol lowing instructions The GREEN YELLOW wire must...

Page 6: ...n provide additional safety features If you are unable to put the power plug into the socket try it again the other way If you do not succeed to put the power plug into the socket ask a technician Nev...

Page 7: ...ve tried to offer a high quality dual channel graphic equaliser with some extra filters for a very affordable price In our humble opinion this is probably the best sounding equaliser in its price rang...

Page 8: ...ency Shelving filter 7 High Frequency Shelving filter 8 Low Frequency Notch filter frequency selection 9 Low Frequency Notch filter on off switch with LED indication 10 High Frequency Notch filter fre...

Page 9: ...dBzero has an automatic switchable power supply which accepts a wide range of AC power from 100V to 220V Do not connect the EQ to a 380V power source Never replace the fuse in the Fuseholder 9 with a...

Page 10: ...nd usually where the phase has been shifted 45 If a tuned circuit has a centre frequency of 1 kHz and 3 dB down points at 900Hz and 1 1kHz the bandwidth 200Hz and the Q 5 1000Hz 200Hz The greater the...

Page 11: ...Hz this is mostly a dirty sound with some harmonics if you work from right to left you will try to get rid of all the harmonics first to finally get to the fundamental When working from left to right...

Page 12: ...nd 250Hz With this section you can get rid of unwanted low frequency noise such as rumble or microphone handling noise Again it is better to use this filter to cut off low frequency noise than to use...

Page 13: ...elving filter is a filter with a fixed slope and a fixed frequency at 14kHz Via the rotary control you can adjust the boost cut of the filter between 9dB This filter acts in a similar way as the trebl...

Page 14: ...rnative is our Apex IntelliQ digital system optimiser When trying to remove unwanted feedback start with the low frequency notch filter and then move on to the high frequency notch filter Feedback mos...

Page 15: ...hich measu res the signal on the output after all the filter sections A separate Clip LED will light when you have reached the maximum level of the dBQzero and no more headroom is left this Clip circu...

Page 16: ...ce outputs Maximum Output Level 21dB into 600 Ohms Noise 92dB 20Hz 20kHz A weighted Crosstalk Better than 80dB THD 0 005 20Hz 20kHz Frequency Response 0 5 dB 20Hz 20kHz all controls flat Power Supply...

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