● Alesis 3630 Compressor Modified Unit - Legendary Machine

● This is a modified Alesis 3630 Compressor.

◯ It's a 1U size, 2-channel unit with a compressor and gate combination. The internal circuitry is very simple, with only an input buffer, VCA, and output buffer in the signal path, resulting in very high sound quality.

◯ You can switch between Peak and RMS (average value) modes. Use Peak to firmly control the attack of drums, or RMS for a natural compression effect when applied to the overall mix.

◯ The sound quality is wonderfully natural, with almost no change in sound even with about 20dB of reduction, making it hard to tell if it's even engaged. With its 2-channel configuration, it's versatile for recording and live use, whether for snare and kick, vocals and bass, or as a master compressor. Its minimal tonal change and compact, lightweight design make it convenient for live performances and recording.

◯ Modifications include replacing the power supply diodes and capacitors, using metal film resistors for the signal path, high-quality tantalum capacitors, and a high-speed, good-sounding National Semiconductor LME49740 op-amp.

◯ The gate has been modified with a switchable potentiometer to allow bypassing. When you turn the gate knob all the way to zero, it clicks and bypasses the gate circuit.

◯ It's highly popular as a classic piece of gear in the US, with modification kits even being sold. It has been made into a VST plugin called NightShine, and searching online will reveal many articles. One site even ranked it 20th among the all-time best compressors, alongside legendary units like the Fairchild 670 and Urei 1176.

◯ Accessories include a generic power supply and a custom-made sidechain filter. The sidechain filter prevents the compressor from reacting to low frequencies, allowing for a more natural compression when used on a 2-mix.

◯ While these modified units are always very popular, this is the last one I have in stock. I won't be able to make another modified unit like this until I can acquire more, so please act fast if you're interested. I apologize, but I cannot offer discounts.