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Audiophile Circuits League

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Items 1 to 7 of 7 on page 1 of 1
Cat: 655470 Rel: 03 Jul 17
 
Envelope generator module - 21 HP
Notes: The ADSR envelope from the Japanese 100m system is well-known for its percussivity and the enormous punch. ACL gives us three of them in one single Eurorack module, the Envelope X3.

Sometimes an envelope generator doesn't have to be function-ladden, but just reliable, solid and good. This is what ACL achieves with the Envelope X3 module. The technical quality originates in precision components, as used in measuring instruments for instance, in order to keep the parameters exact, always the same and to keep you happy.

Three identical, classic Attack-Decay-Sustain-Release envelopes are integrated; function-wise rather simple with a gate input and one positive and one inverted envelope output each. The gate inputs are normalized (1 -> 2 -and 1 -> 3; with input 1 as master) which minimizes the amount of patch cords. Normalizations can be disrupted by patching a cable.

Each envelope generator has a time range switch with two positions to select between short and long envelope times.

The LEDs for visualisation were omitted to keep the power consumption low.
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 1 in stock $320.85
Cat: 698459 Rel: 08 Aug 18
 
Universal low-impedance bus board
Notes: The ACL EVE 1 busboard is used to distribute the operating voltages of a power supply unit to supply up to 20 modules in a Eurorack case.

It was developed with the aim of achieving the lowest possible electrical contact resistance between the power supply unit and the modules connected to it.

This is reflected in minimal potential differences between the power supply unit and between all connection terminals of the modules and the terminals, which almost completely eliminates any couplings between modules and the resulting interference.

This is achieved by a six-layer sandwich design in which each voltage supplied by the power supply unit has its own complete layer for distribution to the module connection terminals, i.e. +12V, -12V and +5V each have the complete surface of the bus board available as copper surface, while the ground even has three layers available, resulting in an extremely low resistance of the ground bar (ground). The arrangement of the layers is like a sandwich, there is almost no influence between e.g. the +5V rail on which often disturbing digital modules are connected and ground or the +/- 12V rails. In addition, there are 4 buffer capacitors with 22uF and 100nF each for the +12V and -12V rail, which are arranged as parallel connected packets with 22uF and 100nF each at the outer ends left and right. These capacitors are Ultra Low ESR MLCC types.

Furthermore, a CV and a gate bus are available up to four times (two at the top and two at the bottom, each bridged by a jumper). These are consequently shielded from each other and from the voltage bars and thus cannot influence each other or other voltage bars (+/- 12V, +5V) by crosstalk, which further rounds off the "low-noise design".
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 1 in stock $78.34
ACL Kazu PSU Module (synth module/power supply)
Cat: 698457 Rel: 08 Aug 18
 
High quality power supply in slim 4 HP format
Notes: This PSU solution is of high quality and delivers a constant current without getting hot. Interferences and voltage spikes are minimal. As a direct result, modules connected to the KAZU feature very honest sound and an exceptionally low noise-floor. At most, you can draw 1000 mA from each the +12 V and -12 V rail as well as 500 mA from the +5 V rail. These numbers may appear to be low at first. However, thanks to high precision and great stability, operating the module at maximum capacity is not a problem. Calculating headroom? Heat problems? Not with the KAZU!
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 1 in stock $229.64
ACL Kazu To EVE1 Connection Cable (module connection cable)
Cat: 698460 Rel: 08 Aug 18
 
Module connection cable
Notes: This cable is needed to connect the ACL KAZU PSU module to the EVE busboard. The cable is equipped with two five-pin connectors, which are compatible to KAZU and EVE-1.

Module and bus board are not included.
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 1 in stock $11.80
Cat: 690905 Rel: 17 Dec 18
 
Flagship oscillator featuring ten individual waveform outputs - 26HP
Notes: We are proud to present our newest workpiece: The ACL Multifunction Discrete VCO combines a massive single saw tooth core with a strong sub oscillator - each of them with its individual wave shaper. As usual, we didn't spare any effort to bring you the best quality - from the inside right to the outside.

The module comes with saw, inverted saw, PW rectangle, triangle and sine - all important waveforms of a proper modular unit are featured. We constructed all signal paths in fully discrete design up to the outputs - but it is much more to it than just a clone of a classical VCO:

If you play with the linear detune, it is possible to create awesome "beating effects" between two or more VCOs. The direct relation between the linear detune and VCO response makes it possible to use the same frequency at every pitch - for an atmospheric, rich and alive sound.

If you play the VCO in LFO mode, the module enables to control the speed in the same way as in VCO mode. If you leave V/Oct CV, you can generate very long lasting sweeps.

Another strong feature are the big syncing capabilities: Adjust the sync amount manually or via CV between the range of sync and no sync - and surf through variable degrees from soft to hard sync.

The core should sync to all repeatable waveforms - approximately exceeding 1 V pp - but in case sync wave is important for some applications, it is possible to choose between falling and rising edge sync in order to hold the proper phase relation between the syncing and the synced wave.

The Gate Input gives you the option to reset the VCO core at the beginning of every note. This feature is highly recommended for the creation of bass and percussion patches if every attack should sound equal and systematic at each time the notes are played. The Gate Input can be used as hard-sync input as well, even in the same time with the Sync input.

You are free to modulate both the oscillator and sub oscillator rectangle wave pulse widths through their separate PWM Ins and PW pots.

On top of this, you also have the possibility to choose between different PWM "carrier" waves to change the PWM-behaviour: Rising and Falling Sawtooth will create an unsymmetrical PWM, while Triangle will create a very musical sounding symmetrical PWM.
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 3 in stock $900.31
Cat: 673535 Rel: 22 Dec 17
 
Multiple module consisting of an active & passive signal distributor
Notes: The ACL Multi II is a Multiple module providing both non-buffered and buffered outputs. The non-buffered section has one input and six outputs, freely interchangeable and the buffered section consists of one inverting and one non-inverting high-impedance input and five low-impedance outputs. Due to the use of precision low-tolerance resistors and low-noise/low DC-drift/Offset Operational Amplifiers, the module reliably delivers minimal error copies of the incoming signals. The inverting and non-inverting buffered inputs can also function as a mixer, giving at the outputs the difference between the respective signals fed to them.
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$87.99 SAVE 20%
 3 in stock $70.39
Cat: 665162 Rel: 05 Oct 17
 
Analog oscillator with ramp-core design, featuring rising/falling sawtooth, pulse, triangle & sine waveshape outputs
Notes: The ACL Variable Sync VCO consists of one ramp core oscillator with several wave shaper sub-circuits, all having that classical vintage tone, loved by a lot of musicians and sound-synthesists.

The VCO is capable of delivering that without sacrificing tracking precision and low temperature drift.

Available waveshapes are saw, inverted saw, triangle, sine and PW rectangle, which uses the saw wave from the waveshaper as a carrier for the PWM. It can be varied by CV and manually within a range from 0 percent to almost 100 percent.

The possibility to play VCO in low, middle and high modes, together with the 10 turn precision Tune pot results in a very convenient "on the fly" way of tuning the module. Its core can be frequency modulated exponentially from two inputs, both CV controlled. When fully open the input attenuators are calibrated for 1 V/Oct. There is one more input - for linear modulation with manual amount control, AC coupled and configured like differentiator. In this way it is sure no detuning caused by DC, will take place when modulation signal is presented at the FM Input, but only frequency modulation, centred around the already played tone.

Syncing the core to outside source makes a whole lot of difference, when there is the additional option to vary continuously by CV and manually the threshold of synchronization from no sync, soft sync and hard sync. This input is configured as attenuverter for even more flexibility. Note when the Threshold pot is fully CW there will be no sound output anymore. The reference wave source for the soft sync is the saw from the oscillator. Sync input itself reacts to every repeatable waveform with amplitude higher than 1.2 Vpp.
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 1 in stock $405.61
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