Interface cards that plugged into the PDP-11's Unibus slots (the Digital Audio Interface, or DAI) provided analog and digital audio input and output for interfacing to Soundstream's digital recorders and conventional analog tape recorders.
#Soundstream 4 channel software#
The Digital Editing System, as Soundstream called it, consisted of a DEC PDP-11/60 minicomputer running a custom software package called DAP (Digital Audio Processor), a Braegen 14"-platter hard disk drive, a storage oscilloscope to display audio waveforms for editing, and a video display terminal for controlling the system. In 1978, Soundstream, who had made one of the first commercially available digital audio tape recorders in 1977, built what could be considered the first digital audio workstation using some of the most current computer hardware of the time. ĭAWs are used for producing and recording music, songs, speech, radio, television, soundtracks, podcasts, sound effects and nearly any other situation where complex recorded audio is needed.Įarly attempts at digital audio workstations in the 1970s and 1980s faced limitations such as the high price of storage, and the vastly slower processing and disk speeds of the time. Regardless of configuration, modern DAWs have a central interface that allows the user to alter and mix multiple recordings and tracks into a final produced piece. DAWs come in a wide variety of configurations from a single software program on a laptop, to an integrated stand-alone unit, all the way to a highly complex configuration of numerous components controlled by a central computer. Speakers are commonly available in a variety of voice coil configurations and impedances, so be sure the configuration of yours will be no less than 2-ohm.Music production using a digital audio workstation (DAW) with multi-monitor set-upĪ digital audio workstation ( DAW) is an electronic device or application software used for recording, editing and producing audio files. An “Ohm” is the measurement of resistance (impedance) of a speakers voice coil, which indicates how much the amplifier will resist the flow of power to it. Protection triggers include speaker output direct short, speaker impedance less than the amplifiers stability, or other unknown conditions causing the amplifier internal temperature to rise to unsafe levels.Ģ-ohm & 4-Ohm Bridged Minimum Impedance StabilityĪn amplifiers impedance stability is its ability to continuously power speaker(s) of no less than the given impedance per channel, without the risk of damage. MOSFET power supply is the stable & efficient conversion of a vehicles Direct Current (DC) power to Alternating Current (AC) power for speakers.ĭirect Short, Thermal, & Overload Protection CircuitsĬonventional amplifier circuitry include a self-preservation mode, which temporarily shuts down the amplifier, protecting it from stress and risk of damage.
Military Grade FR-4 PCB w/ MOSFET Power SupplyįR-4 circuit board substrate is a woven fiberglass cloth impregnated with an epoxy resin, providing good electrical insulation properties and heat resistance exceeding 260OF. The amplifiers pre-amp output daisy-chains the audio signal to multiple amplifiers of complex audio systems. Twisted pair RCA cables are optimal for their noise rejection properties. Simultaneously, active crossovers protect speakers from damage by harmful frequencies, and preserve optimum performance.Ĭonnect the low level (pre-amp) audio output of the car stereo to the amplifier, using good quality twisted pair RCA interconnect cables. Active crossovers have much lower power loss, if any at all. Passive crossover circuits (like those that come with speakers) can have a power loss of 0.5dB or more. Regardless of the configuration, Arachnid amplifiers pave the road of reliability and longevity you expect from Soundstream.Īctive 12dB/Octave Crossovers & Bass BoostĪctive crossovers built into an amplifier are the most efficient type of crossovers to use in car audio systems. Each stereophonic pair can power individual 4-ohm or 2-ohm speakers, while a bridged pair supersizes it’s strength to a 4-ohm load. 2-channel & 4-channel models take every advantage afforded by Class A/B linear amplifier technology, a compromise of performance and high fidelity characteristics. Arachnid Amplifiers are the next step in amplifier fundamentals.
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