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8

Installation

Voltage Selection

Before connecting the PASSEQ to the mains, make sure that the voltage selection corre-
sponds to the values of your local power grid (230 or 115 volts). Inside the power connec-
tor, to the right, next to the on/off switch, there is an opening that displays the voltage 
selected. If the voltage indicated does not correspond to the one required, change it by 
following this procedure:

Open the power connector lid with a small screwdriver (use the tiny slots on the right hand 
side). Use the screwdriver to lever the red fuse holder from above until you can grab it. 
Take the fuse holder out and replace the fuse with one corresponding to the local power 
grid specifications. You can find the adequate values on the rear of the unit or on page 16 
of this user‘s manual. Turn the fuse holder around 180 degrees and place it back again. 
When you close the lid again, you should see the correct voltage displayed in the opening.

First Steps

Before turning on the PASSEQ you must first connect the included 3-pin power cord to the 
3-pin IEC socket. The transformer, power cord and IEC socket all comply to the VDE, UL 
and CSA regulations.

The PASSEQ should not be installed in close proximity to equipment that emits magnetic 
fields or emanates heat. Avoid exposure to heat, moisture, dust, and vibrations. Do not 
install the PASSEQ close to any power amps or digital processors. Instead, install it in a 
fully „analog rack” where any interferences can be avoided (Word Clock, SMPTE, MIDI 
etc.).

The unit should be powered off before connecting or disconnecting any cables or equip-
ment to it.

Use the On/Off switch on the rear panel to turn the unit on or off. The illuminated red LED 
in the middle of the front panel indicates the unit‘s operating status. The On/Off switch 
was placed on the rear panel to avoid any emissions due to voltage-carrying conductors 
running across the unit and affecting sound. When powering on or off, there‘s no need 
to observe a specific sequence regarding the connected devices. However, like with any 
audio signal chain, power amplifiers should always be powered on last and powered off 
first. The PASSEQ can be powered on and off with the use of a circuit breaker, as long as 
the total load does not exceed the rating of the latter.

Summary of Contents for Passeq

Page 1: ...PASSEQ Passive Mastering Equalizer Test Report Manual Handbuch...

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Page 3: ...PASSEQ Passive Mastering Equalizer Manual...

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Page 5: ...dth 6 Passive EQs 7 Installation 8 Voltage Selection 8 First Steps 8 Cabling Rear Side 9 XLR inputs and outputs 9 Control Elements 11 Layout of Control Elements 12 Frequency 12 LF and LF 12 MF and MF...

Page 6: ...are under continuous development and improvement Technical specifications are subject to change Package Contents PASSEQ Passive Mastering Equalizer Power cord Manual The PASSEQ Equalizer is available...

Page 7: ...hoice of frequencies All passive filter components variable resistor capacitor and coil deliver excellent sonic characteristics An important part of this process is played by coil and condenser loadin...

Page 8: ...ring DVD in the USA Simon Heyworth s Super Audio Mastering in the UK Galaxy Studios in Belgium and the legendary Wisseloord in the Netherlands for instance The 120 volt technology is based on op amps...

Page 9: ...to doubling the acoustic power 6 dB correspond to twice the sound pressure level and 10dB correspond to twice the perceived loudness When it comes to volume the 120 volt technology exhibits a performa...

Page 10: ...is usually about 3dB less with the overall increase set to maximum This gives the typical rising form of the shelf filter s response curve Peak Filters A peak filter boosts or cuts a chosen frequency...

Page 11: ...l energy of the attenuated signal level though it is not part of the actual filter circuit Passive filters react differently than active filters mostly due to the saturation and load ing characteristi...

Page 12: ...wer cord to the 3 pin IEC socket The transformer power cord and IEC socket all comply to the VDE UL and CSA regulations The PASSEQ should not be installed in close proximity to equipment that emits ma...

Page 13: ...ection is necessary the correct polarity of the conductors needs to be observed Ground Lift switch to avoid ground loops On the rear panel of the PASSEQ Mastering Equalizer see page 10 is also a GND L...

Page 14: ...MAINS XLRs Balanced 4dBu 1 GND 2 HOT 3 COLD WARNING AVIS RISQUE DE CHOC LECTRIQUE NE PAS OUVRIR RISK OF ELECTRIC SHOCK D O N O T O P E N CAUTION Serial Number Made in Germany 115VAC 230VAC 50Hz 60Hz P...

Page 15: ...1 6 5 1 7 0 0 2 0 3 0 6 1 1 1 7 2 6 3 8 5 7 9 2 1 2 5 0 0 2 0 5 1 1 7 2 6 3 8 5 3 7 7 1 1 1 4 5 1 0 0 9 0 8 0 7 0 6 0 45 0 35 0 2 5 0 1 7 0 1 2 0 1 Interval dB dB dB dB dB dB dB Hz Hz Hz Hz Hz Hz pass...

Page 16: ...LF band encom passes a range of 10Hz to 550Hz The maximum available increase in this LF boost band is 17 dB while the maximum reduction of the LF band is 22dB Optically these filter bands may be repre...

Page 17: ...ations result in slightly differing sonic characteristics Q HF Band Like already mentioned in the last chapter with the HF Band you got the possibility to change the Q factor value thus the bandwidth...

Page 18: ...e the out put level up to 10dB These controls are also 41 step detented potentiometers Channel Switch The two centrally located orange lit switches activate or deactivate the corresponding left and ri...

Page 19: ...n and Yang principal means ideally to consider always such implied repercussions of work in one frequency for example that in working to enhance warmth that one might want to avoid losing presence Har...

Page 20: ...B C 91 8 dBu Noise A weighted Gain 0 dBu EQ 0dB B C 95 2 dBu Noise CCIR Gain 0 dBu EQ 0dB B C 86 2 dBu THD N Gain 0 dBu EQ 0dB B C 102 dB Common Mode Rejection 60dBu at 1 kHz Gain 0 dBu EQ 0dB B C Tr...

Page 21: ...of time Unplug the power chord from the mains to cut power supply to the unit Always make sure that the mains plug is easily accessible Opening the unit Simply put DON T if you are not a certified SPL...

Page 22: ...ts or those with identical specifications as the originals Incorrectly substituted parts can lead to fire electrical shock or other dangers including further equipment damage Safety inspection Be sure...

Page 23: ...copied or reproduced in any manner in part or fully without prior authorization by SPL Sound Performance Lab SPL con tinuously strives to improve its products and reserves the right to modify the prod...

Page 24: ...0 17 0 12 0 1 I n t e r v a l dB dB dB dB dB dB dB Hz Hz Hz Hz Hz Hz passive mastering equalizer PASSEQ Sound Performance Lab Model 1650 A Wolf Neumann Design Q HF HF MF MF LF LF Output 120V DC Audio...

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