Mihai Dănciulescu Posted February 14 Posted February 14 Pret: 800 Eur Localitate: Bucuresti Contact: 0721968461 Stare: Uzura normala Accept schimburi: Nu accept schimburi Cumparat de pe Reverb, in stare perfecta de funcționare, estetic impecabil. Eu l-am folosit doar in studio pentru cateva melodii. Pret 800 eur si nu doresc nici un schimb. Contact WhatsApp 0721968461 Pun aici prezentarea inițială: Marshall JCM900 model 4500 head, 50watt. Year of construction 1991 (serial Z17294), version that came out from the factory standard with EL34. It currently features 2 EL34 Svetlana C logo (the absolute top) and 3 12AX7 Sovtek selected for the best sound. Very good condition of the tolex. Original LCR electrolytic capacitors and Drake transformers both original and perfect. The head was completely overhauled by BRBS Amplification with cleaning of the potentiometers and replacement of worn ones, and modified with a very famous BRBS modification which makes the sound more full-bodied and "tube-like" without affecting the typical Marshall timbre and feeling, without the harsh high frequencies typical of the jcm900 dual reverb. A push/pull potentiometer has been inserted on the front panel which regulates the DEPTH, i.e. the amount of bass in the power amp and if pulled out give a small additional bass boost only on the clean channel to make it more bluesy. The modification alone is worth €200 if done at the BRBS laboratory. Do you want plexy sound up to jcm800 high gain without spending a fortune? this is the right product! ATTENTION, for the nitpickers who ask: the modification does not involve the total removal of the diodes as they are necessary to work synergistically with the modification (which primarily provides for a greater gain of the valve stage in order to achieve true valve saturation) . Those who indiscriminately promote the removal of diodes from JCM900s know nothing about hybrid circuitry and have no real experience in the field of amplifiers.
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