Doepfer A-151

Quad Sequential Switch Module

  • Electronic 4-position rotary switch
  • Trigger input
  • Reset input
  • 4 Inputs
  • 4 Outputs
  • Voltages of -8V to + 8V can be processed
  • Euro rack format
  • Width 4 HP
  • Depth: 35 mm
  • Power consumption: +20 mA (+12V)/ -10 mA (-12V)

Further Information

Width 4 TE / HP

These are other customers' choices:

Customers who looked at this item have bought these:

Doepfer A-151
52% bought this exact product
Doepfer A-151
Available immediately
Available immediately

This item is in stock and can be dispatched immediately.

Standard Delivery Times
$59 Add to Basket
Doepfer A-160-2 Clock Divider II
16% bought Doepfer A-160-2 Clock Divider II $99
Doepfer A-160 Clock Divider
8% bought Doepfer A-160 Clock Divider $63
Doepfer A-150
6% bought Doepfer A-150 $54.10
Doepfer A-160-5 VC Clock Multiplier
4% bought Doepfer A-160-5 VC Clock Multiplier $99
Our most popular Clock-, Trigger-Modules
26 Customer Ratings:
  • 5
  • 4
  • 3
  • 2
  • 1
4.8 /5
  • handling
  • features
  • quality
Total
Immensely useful
Martyn Q., 01.10.2015
If you are yet to get your head around what a sequential switch does and how you'd use it, the a151 can take an input and route it to up to four different outputs (or vice versa, can be used the opposite way round to route four inputs to one output), selected sequentially by sending a trig. There is also a reset trig input for jumping back to the first step (useful for resetting polyrhythms, for example).
"So what?", you may be thinking...

The awesome power of switches becomes apparent when you get your hands on one and start patching. Some ideas:
Put 4 different audio rate oscillator waveshapes to the four inputs and advance the steps at audio rate, you now have a nice complex wave coming out.
Put 4 constant cvs to the inputs and you have an up to 4 step cv sequencer, great for arpeggios when the ouput is mixed with a v/oct signal and sent to an oscillator.
Send multiple clocks to the 4 inputs, stepping through rhythmically, and send the output to some logic - incredibly complex drum patterns abound.
Send clock to input one and mult it to the step advance, leave inputs 2-4 empty - now you have a clock divider, division selected by the number of inputs switch!
Take your single synth input and send to four different fx configurations, step through them for each section of your song structure (verse/chorus/bridge etc) - switches are amazing for creating complex song structures that you just couldn't do without them.

And this all just with one 4 step switch - add another and the possibilities increase exponentially. Add its bigger brother, the a152 (which is 8 channel and addressed, so can pick the steps sequentially but also ad hoc as needed via cv) and its just insane how much you can do with it. Switches are a must have for complex patching, and you cant go wrong with doepfer for the price vs power vs quality.
Helpful · Not helpful · Report
Report rating…

Do you believe this rating to be inaccurate or unacceptable for some reason?

Send report
Total
awesome and versatile
24.10.2016
It took me a while after starting my modular system to realise how useful voltage controlled switches could be. The manual offers quite a few suggestions.

I mostly use this for transposing sequences using a divided down clock signal to shift a sequence making an eight note sequence into 32. I also have set it up for sequencer ratcheting using various clock signals to add interest and rhythm to a simple sequence. Being able to choose whether you use 2, 3 or 4 steps also adds complexity. I often use this switch as a performance control. Audio signals come through clean and clear. It'll happily run at audio frequencies to make interesting wave forms and it has the all important LEDs to let you know what it's doing.

This module is neat small and inexpensive - lots squeezed into 4HP.
Helpful · Not helpful · Report
Report rating…

Do you believe this rating to be inaccurate or unacceptable for some reason?

Send report
Total
Switch without contradictions
S Jones, 19.01.2018
A lovely, and straightforward sequential switch. Manually choose the number of steps, either 4 in and 1 out, or 1 in and 4 out.
Use this to switch between sequences to create longer or more varied compositions. Use this to switch between modulation to create evolving variations.
Wildly useful, often overlooked, the A-151 is essential.
Helpful · Not helpful · Report
Report rating…

Do you believe this rating to be inaccurate or unacceptable for some reason?

Send report
Total
handling
features
quality
Great module
Gregorio S., 07.04.2019
You can do a lot with it, and it?s not expensive
Helpful · Not helpful · Report
Report rating…

Do you believe this rating to be inaccurate or unacceptable for some reason?

Send report
Show variations of this product
Doepfer A-151
(26)
Doepfer A-151

Quad Sequential Switch Module Electronic 4-position rotary switch, Trigger input, Reset input, 4 Inputs, 4 Outputs, Voltages of -8V to + 8V can be processed, Euro rack format, Width 4 HP, Depth: 35...

  • Switch Modul: Yes
  • Width: 4 TE / HP
  • Module: Yes
  • CV-Editor/VC-Processor: No
  • Empty Rack, Or Housing: No
  • Tools: No
  • Basic System: No
  • Accessories: No
Doepfer A-160-2 Clock Divider II
(20)
Doepfer A-160-2 Clock Divider II

Frequency Divider For clock/trigger/gate signals, Width: 4 TE/ 4 HP / 20 mm

  • Width: 4 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-180-2 Multiples
(80)
Doepfer A-180-2 Multiples

Passive Multi-Port Distributor 8x Interconnected jacks, Sockets are divided into 2x quadruple groups; but can also be modified to an eight-multiple (soldering bridge on the circuit board), Width:...

  • Width: 2 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-124 Wasp Filter SE
(62)
Doepfer A-124 Wasp Filter SE

Wasp Filter Special edition, Special 12 dB multimode filter, Circuit technology of the "EDP Wasp", Black front, Yellow pot caps, Width: 8 HP, Depth: 45 mm, Power requirements: +30 mA (+12 V)/-10 mA...

  • Width: 8 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-138s Mini Stereo Mixer
(45)
Doepfer A-138s Mini Stereo Mixer

Mini Stereo Mixer 4-in-2 mix module in Eurorack format, Four inputs with attenuator and pan control, plus two 3.5 mm mini jack outputs, Width: 8 HP, Depth: 30 mm, Power requirements: +10 mA (+12 V)...

  • Modul Type: Stereo
  • Module: Yes
  • Width: 8 TE / HP
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-119
(46)
Doepfer A-119

External Input / Envelope Follower Module A-119 is used to integrate external audio signals into the system A-100, and includes the components pre-amplifiers, envelope follower and a comparator....

  • Width: 8 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-198 (Module + Manual)
(8)
Doepfer A-198 (Module + Manual)

Trautonium Controller Consists of Doepfer A-198 Module and Ribbon Controller, Ribbon Controller: Generates a control voltage for the pitch of the oscillators by touching the position sensor,...

  • Width: 8 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-110-1
(72)
Doepfer A-110-1

Standard VCO for Modular System A-100Module A-110-1 (VCO) is a voltage controlled oscillator. The A-110-1 produces frequencies in a range of about 8 octaves, of which four waveforms are available...

  • Analog: Yes
  • Module: Yes
  • Digital: No
  • Width: 10 TE / HP
  • Empty Rack, Or Housing: No
  • Basic System: No
  • variants: Doepfer
  • Accessories: No
Doepfer A-160 Clock Divider
(40)
Doepfer A-160 Clock Divider

Clock Divider Module Frequency divider for digital clock signals, 6 Outputs (input frequency / 2 - input frequency / 64), LED indicator for each output, Eurorack format, Width: 4 HP, Depth: 40 mm,...

  • Width: 4 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
Doepfer A-156
(37)
Doepfer A-156

Dual Quantiser The A-156 Module is a dual control voltage quantiser. A quantiser converts a continuous input control voltage in the range of 0 ... 10V into a stepped output voltage in the same...

  • Switch Modul: No
  • Module: Yes
  • CV-Editor/VC-Processor: Yes
  • Empty Rack, Or Housing: No
  • Tools: No
  • Width: 8 TE / HP
  • Basic System: No
  • Accessories: No
Doepfer A-125
(11)
Doepfer A-125

Voltage Controlled Phaser VCP for Modular System A-100 The Module A-125 is a voltage controlled phase shifter.Phase shifting can be controlled either manually or by control voltage. Other...

  • Width: 8 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
$59 €50
The shipping costs are calculated on the checkout page.

The price in USD is a guideline price only!

Available immediately
Available immediately

This item is in stock and can be dispatched immediately.

Standard Delivery Times
Share This Product
Your Contacts
Phone: +49-9546-9223-30
FAX: +49-9546-922328
test results:
Offers include VAT and are valid as long as stocks last. We do not accept liability for typographical errors or inaccurate information of any kind. *RRP = manufacturer's / distributor's recommended retail price in Germany
(1)
Recently Viewed
Behringer RD-6-SR

Behringer RD-6-SR; Analog Drum Machine; 8 Drum-Sounds: Bass Drum, Snare Drum, Low Tom, High Tom, Cymbal, Clap, Open Hi-Hat und Closed Hi-Hat; volume control for all instruments and the Accent track; build-in distortion effect with controls for intensity and tone;...

Recently Viewed
Presonus AudioBox 96 Studio Ult 25th An

USB Audio Interface Recording Set Consists of AudioBox USB 96 25th Anniversary Edition, Studio One Artist + Studio Magic Plugin Suite (Ableton - Live Lite, Arturia - Analog Lab Lite 3 and many more) (ESD download), Eris E3.5 active...

(2)
Recently Viewed
Harley Benton Dullahan-FT 24 Roasted IB

Headless Electric Guitar Ergonomically shaped alder body, Bolt-on neck: Roasted Canadian flamed maple, Roasted maple fretboard, Fretboard inlays: Black offset dots, Neck profile: Modern C, Fretboard radius: 350 mm, 24 Stainless steel jumbo frets, GraphTech Tusq XL nut, Nut...

Recently Viewed
Omnitronic TRM-202 MK3

Omnitronic TRM-202 MK3; 2-channel rotary mixer with 3-band frequency isolator for DJs; classic rotary mixer with 2 input channels and integrated 3-band frequency isolator for DJs; gain control, 2-way equalizer (Highs/Lows) and phono/line switching per channel; dedicated boost and kill...

Recently Viewed
Magma CTRL Case MPC One

Magma CTRL Case MPC One, suitable for Akai MPC One, 6 mm thick and rigid Durashock molded EVA foam and water rejecting polyester exterior shell, Sturdy zipper, Including practical cable organizer panel, Incl. removable egg-foam padding, Compatible with Decksaver cover,...

Recently Viewed
beyerdynamic T1 3rd Generation

beyerdynamic T1 3rd generation high-end Tesla headphones, open back, over ear design, frequence range 5 - 50000 Hz, impendance 32 Ohms, nominal sound pressure level 100 dB (1 mW ), power handling capacity 300 mW, max. SPL 124 dB (300...

Recently Viewed
Thomann ComboDesk88 - designed by Zaor

Producer Workstation Designed by Zaor, Ideal for home and project studios, Extremely sturdy and ergonomic construction, 19" Racks with a total of 3x 3 U, Includes cover plates for 19" racks for expanding the table surface and rack rail,...

(2)
Recently Viewed
Behringer RD-6-AM

Behringer RD-6-AM; Analog Drum Machine; Acid Smiley Edition; 8 Drum-Sounds: Bass Drum, Snare Drum, Low Tom, High Tom, Cymbal, Clap, Open Hi-Hat und Closed Hi-Hat; volume control for all instruments and the Accent track; build-in distortion effect with controls for...

Recently Viewed
RME HDSPe AIO Pro

RME HDSPe AIO Pro; 30-channel PCI Express audio interface; 192 kHz / 24 bit; ADI-2 Pro converters AK5572 and 2 x AK4490; the entire analog input range relies on the circuit design of the ADI-2 Pro (+24 / +19 /...

Recently Viewed
Larry Carlton H7 STR

Electric Guitar Semi-hollow design, Maple body, Flamed maple top, Mahogany neck, Set-in neck attachment, Ebony fretboard, Square fretboard inlays, C Neck profile, 22 Medium jumbo frets, Scale: 627 mm (24.7"), Fretboard radius: 305 mm (12"), Nut width: 42 mm...

Recently Viewed
Rane Mag Four Fader

Rane Mag Four Fader, Compatible with RANE Seventy, Seventy-Two MKII und Seventy-Two, Contactless Fader-technology, with additional Hall-sensor, customizable magnetic field voltage, Exclusive Fader Cap developed by RANE, incl. DeoxITFaderLube F100 Fader spray

Recently Viewed
Audio-Technica ATH-M50 XBT PB

Bluetooth Headphones Special edition, Closed, Circumaural, 45 mm driver with neodymium magnet system and CCAW voice coils, 90° Swiveling ear cups, Control buttons on the headphones, Bluetooth version 5.0, Up to 40 hours of operation, Frequency range: 15 -...

Give Feedback
Feedback Found an error or want to give us feedback about this page?

We're looking forward to hearing from you and aim to solve any problems as soon as we can.