All mods

Clone de la TB-303 modifié par Circuitbenders, en parfait état, hormis les stickers qui se décollent un peu. Fonctionne nickel. Moded by Circuitbenders clone of the famous TB-303. Fully working. Demo here: https://youtu.be/GSebDXf9rP4 Here are the specs: The MAM MB33 Retro is the latest version of the MB33 / FAT FREEBASS clone of the infamous Roland TB-303. As standard it features all of the original TB-303 controls, and also has an external audio input through the filter and VCA. Overlapping midi notes gives you that essential 303 note slide, and any midi note with a velocity of 120 or more will trigger the note accent. Realistically if this synth was programmed correctly, you would be VERY hard pressed to distinguish between this unit and a real 303 in a mix. In a side by side comparison i'd say it sounds a little meatier than the Behringer TD3, with a little more girth and analogue weight to the sound. We have modded this machine with our circuitbenders Acid FM mods to give a huge range of extra sounds, without diluting the essential TB-303 character. MODS INCLUDE: VCO On/Off Switch: Normally when you plug a jack into the external VCF input, the MB33's VCO is automatically removed from the mix. As there may be occasions where you don't want this to happen, or situations such as when you're using the filter lock mod (see below) when you want to be able to turn the VCO on and off yourself, we've added a switch to add manual control of this. VCO Drive: The MB33 retro seems to be designed to slightly distort the output stage at full volume, much like the TB303 did. The Drive mod boosts this distortion savagely for some grungy acid techno sounds. This mod increases the maximum amount of distortion at maximum volume. The intensity of the distortion can be set using the normal volume knob. Resonance Boost Switch: An annoying issue with these machines is that the resonance never reaches self oscillation (but then neither did the TB303) and also drops off considerably when the cutoff is over 3/4 of the way up. We've solved this problem by adding the resonance boost switch. With this switch activated the filter starts to squeal with the resonance about halfway up, and then just screams with self oscillation at any higher settings. The resonance boost is especially effective when used with the VCF FM mods. VCF FM: Essentially VCF FM (Frequency Modulation) allows you to modulate the filter cutoff at audio frequencies to create all kinds of clanging cross modulation and bizarre alien splatters & sweeps. This effect works best with the resonance cranked up into self oscillation which is where the resonance boost mod comes into play. The FM controls allow you to select one of four sources for the FM signal. The first is the normal filter input socket round the back. This means you can run a sound through the filter section, but also use that sound to modulate the filter cutoff at audio frequencies at the same time. The second source is a new FM input jack on the right hand side of the case. Using this source allows you to run a sound through the filter from the VCF input or just use the internal VCO, and at the same time modulate the filter cutoff with an entirely independent sound source at the FM in jack. The actual audio from the FM in jack is not heard. The remaining two sources are the sawtooth and square wave signal from the main oscillator. These can be selected as sources completely independently of the setting on the VCO waveform knob The FM source select knob also has an 'off' setting. The amount of FM applied to the VCF is controlled using the VCF FM knob. VCF CV input: This mods adds 3.5mm jack on the right side of the machine that will accept an external CV to control the filter cutoff. The CV input should range from 0-5v. Higher voltages, or negative voltages are NOT recommended. This mod also adds a switch on the front to toggle between internal and external cutoff cont

Clone de la TB-303 modifié par Circuitbenders, en parfait état, hormis les stickers qui se décollent un peu. Fonctionne nickel. Moded by Circuitbenders clone of the famous TB-303. Fully working. Demo here: https://youtu.be/GSebDXf9rP4 Here are the specs: The MAM MB33 Retro is the latest version of the MB33 / FAT FREEBASS clone of the infamous Roland TB-303.  As standard it features all of the original TB-303 controls, and also has an external audio input through the filter and VCA. Overlapping midi notes gives you that essential 303 note slide, and any midi note with a velocity of 120 or more will trigger the note accent. Realistically if this synth was programmed correctly, you would be VERY hard pressed to distinguish between this unit and a real 303 in a mix. In a side by side comparison i'd say it sounds a little meatier than the Behringer TD3, with a little more girth and analogue weight to the sound. We have modded this machine with our circuitbenders Acid FM mods to give a huge range of extra sounds,  without diluting the essential TB-303 character.  MODS INCLUDE:  VCO On/Off Switch: Normally when you plug a jack into the external VCF input, the MB33's VCO is automatically removed from the mix. As there may be occasions where you don't want this to happen, or situations such as when you're using the filter lock mod (see below) when you want to be able to turn the VCO on and off yourself, we've added a switch to add manual control of this. VCO Drive: The MB33 retro seems to be designed to slightly distort the output stage at full volume, much like the TB303 did. The Drive mod boosts this distortion savagely for some grungy acid techno sounds. This mod increases the maximum amount of distortion at maximum volume. The intensity of the distortion can be set using the normal volume knob.  Resonance Boost Switch: An annoying issue with these machines is that the resonance never reaches self oscillation (but then neither did the TB303) and also drops off considerably when the cutoff is over 3/4 of the way up. We've solved this problem by adding the resonance boost switch. With this switch activated the filter starts to squeal with the resonance about halfway up, and then just screams with self oscillation at any higher settings. The resonance boost is especially effective when used with the VCF FM mods.  VCF FM: Essentially VCF FM (Frequency Modulation) allows you to modulate the filter cutoff at audio frequencies to create all kinds of clanging cross modulation and bizarre alien splatters & sweeps. This effect works best with the resonance cranked up into self oscillation which is where the resonance boost mod comes into play. The FM controls allow you to select one of four sources for the FM signal. The first is the normal filter input socket round the back. This means you can run a sound through the filter section, but also use that sound to modulate the filter cutoff at audio frequencies at the same time. The second source is a new FM input jack on the right hand side of the case. Using this source allows you to run a sound through the filter from the VCF input or just use the internal VCO, and at the same time modulate the filter cutoff with an entirely independent sound source at the FM in jack. The actual audio from the FM in jack is not heard. The remaining two sources are the sawtooth and square wave signal from the main oscillator. These can be selected as sources completely independently of the setting on the VCO waveform knob The FM source select knob also has an 'off' setting. The amount of FM applied to the VCF is controlled using the VCF FM knob.  VCF CV input: This mods adds 3.5mm jack on the right side of the machine that will accept an external CV to control the filter cutoff. The CV input should range from 0-5v. Higher voltages, or negative voltages are NOT recommended. This mod also adds a switch on the front to toggle between internal and external cutoff con

Here we have a classic jbl 5235 dual channel active xover.It is fully operational with two NEW interchangeable frequency cards inserted in it's slots.Both are 18db's but with different cutting frequencies.One cut's at 800hz and the other one at 500hz.All cards can be modified in order to meet the requested frequency, be sure that it is carried out ONLY by an QUALIFIED TECHNICIAN. I'll provide a copy of the manual (available through the web) with the corresponding values of resistors neccessary to perform the mods. Item is described as in used condition and is far from mint with several slight marks on top and underneath covers due to rack mounting. There's also a small scuff of about 1.5cms is found on fascia, see pic. I SHIP WORLWIDE ask for the exact shipping cost for countries outside EU. Edit: shipping outside EU is 60€  Filtre actif classique jbl 5235.Il est entièrement fonctionnel avec deux cartes de fréquence NEUVE interchangeables insérées dans leurs emplacements.Les deux sont de18 dB mais avec des fréquences de coupure différentes.Une coupe à 800hz et l'autre à 500hz.Les cartes sont modifiable permettant ainsi d'atteindre la fréquence souhaitée, assurez-vous que cette intervention soit effectuée UNIQUEMENT par un TECHNICIEN QUALIFIÉ. Une copie du manuel (disponible sur le Web)sera fourni avec, contenant les valeurs correspondantes des résistances nécessaires pour effectuer les modifications. L'objet est décrit comme d'occasion avec plusieurs rayures sur les capots en raison du montage en rack. Il y a aussi une petite éraflure d'environ 1,5 cm sur la face avant, voir photo.