7. Switching

Traditionally, the wah-wah effect was activated by a mechanical latching switch of the type shown below, located under the pedal toe. Pushing the pedal all the way forward and applying a little additional pressure would engage the filter. The Vox, Crybaby, and many more use this arrangement even to this day.

Latching footswitch

There are disadvantages to the design however. Firstly, the switch produces mechanical noise in the form of an audible click when operated, although this is not really a problem when playing at volume. More seriously though, when the pedal is activated, the wah filter will be by definition in its fully open position. To counter this, Morley decided to place the switch to one side of the pedal, allowing the effect to be engaged with the wah frequency in any desired preset position – particularly useful if you are using the effect as a kind of fixed tone control.

Morley Power Wah

Note the switch on the right side of the unit.

Another issue with the conventional switching scheme was that even when the effect was bypassed, the guitar signal was still passing through the internal circuitry. This was a cause of worry for many players as they perceived that the guitar signal was being degraded in terms of level and high frequency content - a concern which was largely unfounded, as any losses there were could be compensated for easily by making minor adjustments to the amplifier’s pre-amp and tone controls.

Nevertheless, some purists simply had to have a ‘true bypass’. This involved configuring the switch such that when the effect was ‘off’, the internal circuitry was completely excluded from the signal path. Nothing is perfect though, and true bypass arrangements bring another problem with them - when switching, an audible electrical click can be heard, which at high gain levels can be intrusive – you pays your money and takes your choice! Guitar technicians often offer true bypass functionality as a modification for many older pedals, and some modern off-the-shelf models also feature it, with their designers using some ingenious techniques to minimise the switching noise.

True Bypass

Finally, a third option has become popular – namely FET (Field Effect Transistor) switching. This is a switching process in which two FETs act like solid-state relays, and are able to noiselessly switch signals both mechanically and electrically – the physical switch is a simple momentary action type, as the latching is done electronically. The signal does have to pass through the FETs, but degradation from this is negligible. Boss pedals have always used FET switching, and other companies have since followed suit. It’s worth noting that the switching scenarios discussed only relate to pedals using analogue technologies - things are rather different when you go digital, as we shall see later on.

Uw contactpersoon
Tel: +49-9546-9223-20
Fax: +49-9546-9223-24
Wat een Thomann-fan over ons zegt
Dank voor deze fantastische service! Ik kom graag in de toekomst weer bij jullie bestellen.
Jane Doe, 07.07.2015

in de ‹berblick

Yamaha Stagepas 600BT Subpac M2X Adam T5V Roland R-07 black RME ADI-2 DAC Heritage Audio HA-73 EQ Elite Epiphone Richie Faulkner Flying V Fender Squier Affinity P-Bass PJ ILBK Focal Listen Professional Focal Shape Twin Yamaha Stagepas 400BT Fender SQ Affinity PJ Bass Pack BK 18
Voor u aanbevolen
Yamaha Stagepas 600BT

Mini-PA System with Bluetooth Function Consisting of 2x passive 2-way boxes and 10-channel power mixers, Power mixers and speaker cables can be stored in the boxes for transportation, Successor of the Stagepas 600i, Including 2 speaker cables, each 6...

naar het product
€ 799
Voor u aanbevolen
Subpac M2X

Subpac M2X, Mobile tactile bass system, SubPac adds real depth, connection and enjoyment to whatever you play through it - your music and media comes to life with the added dimension of physical bass. Frequency Response: 1hz-200hz, Wired Input: 3.5mm...

naar het product
€ 398
(2)
Voor u aanbevolen
Adam T5V

Adam Actieve Near-Field Monitor Uitrusting: 5" woofer en 1,9" U-ART ribbon-tweeter, 2x Class-D-versterker: 50 W RMS-woofer, 20 W RMS-tweeter, Frequentiebereik: 45- 25000 Hz, Crossover-frequentie: 3 kHz, Maximaal niveau: 106 dB (1 m / paar), Bass reflex opening aan de...

naar het product
€ 169
(1)
Voor u aanbevolen
Roland R-07 black

Roland Portable MP3/WAV Recorder Met Bluetooth Functionaliteit Stereo-opnames tot maximaal 24 bit / 96 kHz in WAV-formaat of tot maximaal 396 kbps in MP3-formaat op microSD / SDHC-kaart, Ingebouwde stereomicrofoon, Geïntegreerde Hybrid Limiter, Dual Rercording function voor het gelijktijdig...

naar het product
€ 229
(3)
Voor u aanbevolen
RME ADI-2 DAC

RME High-End DA-Converter & Hoofdtelefoonversterker Sample rates: 44.1 kHz tot maximaal 768 kHz, Weergave van DSD en Direct DSD, SteadyClock FS, LCD-display met AutoDark-functie voor verlichting, Desktop behuizing, Afmetingen: 215 x 52 x 150 mm, Gewicht: 1,0 kg, Inclusief...

naar het product
€ 999
Voor u aanbevolen
Heritage Audio HA-73 EQ Elite

Heritage Audio HA-73 EQ Elite; 1-Channel Mic-Preamp wit EQ; based on the 1073; hand wound Carnhill Transformers; 3 stage fully discrete class A mic preamp; max. Gain: 80 dB Mic and 50 dB Line; -20 dB Pad; LO-Z switches the...

naar het product
€ 945
(1)
Voor u aanbevolen
Epiphone Richie Faulkner Flying V

Elektrische gitaar Body en hals: mahonie, Fretboard: ebbenhout, Hals profiel: thin C, 22 jumbo frets, Scale: 628 mm, Pickup: actieve EMG-57 (brug) en EMG-66 (hals) humbucker, Floyd Rose 1000, Grover Rotomatic stemmechanieken, Kleur: zwart, Incl. deluxe gig bag, certificaat,...

naar het product
€ 939
Voor u aanbevolen
Fender Squier Affinity P-Bass PJ ILBK

E-Bas Affinity serie, Elzenhouten body, Esdoorn hals, Indial Laurel fretboard, Halsprofiel: "C", 20 medium fretten, Zadel van synthetisch been, Scale: Long scale, Breedte nut: 41,3 mm, Pickups: 1 Jazz en 1 Standard Split Precision Single Coil, 2 volume- en...

naar het product
€ 233
Voor u aanbevolen
Focal Listen Professional

Headphones Closed, Circumaural, Conversion technology for acoustic transparency and dynamics, Impedance: 32 ohms, Sensitivity (@ 1 kHz - / 1 Vrms): 122 dB SPL, THD (THD, @ 1 kHz / 100 dB SPL): 0.3%, Frequency range: 5 Hz to...

naar het product
€ 249
(1)
Voor u aanbevolen
Focal Shape Twin

Focal Actieve Nearfield Monitor Tweeter met geringe richting voor een flexibele luisterpositie, Gesloten ontwerp met twee passieve membranen voor eenvoudige installatie in de buurt van de muur, 2.5-way concept voor optimale regeling van de bas en lagere middentonen, Optimale...

naar het product
€ 849
(1)
Voor u aanbevolen
Yamaha Stagepas 400BT

Mini-PA System Bluetooth Function Consisting of 2x passive 2-way boxes and 8-channel power mixers, Power mixers and speaker cables can be stored in the boxes for transportation, Successor of the Stagepas 400i, Including 2 speaker cables, each 6 m...

naar het product
€ 555
Voor u aanbevolen
Fender SQ Affinity PJ Bass Pack BK 18

E-Bas set Fender Squier Affinity PJ Bas: Populierenhouten body, Esdoorn hals, Indian laurel fretboard, 20 medium jumbo fretten, Breedte nut: 41,3 mm (1,625"), Scale: 864 mm (34"), Pickups: 1 standaard Jazz Bass Single Coil (brug)...

naar het product
€ 269
Feedback Fout gevonden of wilt u feedback geven op deze pagina?

We kijken er naar uit om van u te horen en proberen elk probleem zo snel mogelijk op te lossen.

Schrijf een kommentaar. Voer s.v.p. uw Email-adres in.