Incorporating four channels of renowned preamplification, independent silk controls, two channels of DI inputs, and an M-S Decoder into a 1U enclosure, the 5024 is a workhorse equipped to enhance the front end performance of any digital or analogue recording system. Each channel of the Portico 5024 is based around the custom transformers and class-A circuitry found in the best-selling 5012. In addition to 72dB of gain, the 5024's mic pres include individually selectable phase, mute, phantom power, a selectable frequency high pass filter, and the Silk circuit which yields the rich warmth and presence of the renowned classic designs. Channels 1 & 2 of the 5024 feature a high-Z input designed for instrument level sources. Channels 3 & 4 feature an M-S switch, which enables Mid-Side decoding without the use of multiple console channels. Low Noise, Low Distortion Operation Much care was given in designing the 5024 to produce as little noise and non-harmonic distortion as possible. Carefully implemented signal paths and Class A operation are a large part of the 5024's sweet, whisper-quiet performance. All Portico modules use input and output transformers and almost entirely discrete component amplifiers. In fact, the Line amplifiers on their own, inserted into the signal chain, are capable of enhancing the sonic quality of many signal sources, especially those of digital origin. These are some of the factors that enable the Portico 5024 to work so unobtrusively within the context of a very high quality audio chain. Gain Trim Silk +66dB in 6dB increments with +/-6dB Trim +/- 6dB level control Adds nostalgic warmth and presence to signals when engaged LED Meters 8 Point LED Peak Meters Engages the HPF circuitry HPS Frequency Selects between 30Hz and 90Hz for the HPF 5024 Transformer Isolated Hi-Z, DI Input Thru Parallel Thru output for use with an external amplifier Ground Lift Lifts the ground connection on the DI Input Polarity Reverses the polarity of the source material Changes CH 3 & 4 from independent to Mid (CH Mute 3) and Side (CH 4) Mutes the output signal Why Transformers? The fine subtleties of circuit design relating to sonic performance are gradually becoming more clearly understood. For example, research has shown conclusively that frequencies above 20kHz affect the way in which humans perceive sound quality. But long before scientific evidence emerged, a substantial body of musicians and engineers knew that equipment with apparently the same technical measurements could sound very different. Incredibly small amounts of musically dissonant odd harmonics can have a disastrous effect on the sound quality. Extraneous noise or interference that finds its way into a signal path seriously impairs performance of the whole chain. Since many control rooms make use of outboard gear that is not well protected from external signals,

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