You should choose a supply that is intended to be used for musical devices to ensure it will be low noise. The supply must use a 2.1mm barrel connector with center-negative polarity. The input transformer and the first stage provide the initial voltage gain. There are three gain stages, the last of which is also the output amplifier.
The supply must be rated for at least 200 mA. The Neve 1066/1073 preamp and its clones (like the Great River) is a simple circuit made clever by its single-knob gain control: a rotary switch. The voltage must be no less than 9 volts and no greater than 18 volts. The Studio One requires a regulated DC power supply. I have no idea about the headroom of any device you might hang after it, nor any idea of the gain of the 1073 in use or the input level so may not know how much headroom you actually have left. The ground lift switch allows the ground to be connected or removed from pin 1 of the XLR. I suspect your converter will not handle that level in its input. When active, the outputs are both affected by the gain, EQ, filters, and master volume. When bypassed, the input signal is buffered and sent to the 1/4" and XLR out, with no signal processing. The soft touch bypass switch controls a relay. The XLR out can drive long cable lengths to feed a console or mixing board. The 1/4" unbalanced output can drive other pedals, preamps, instrument amps, and power amps. The master knob controls the volume of the 1/4" and XLR out. The LPF cutoff frequency varies between 20k to 330 Hz. The HPF cutoff frequency varies between 25 to 190 Hz. The mid EQ also gives 15 dB of boost or cut with a dedicated variable frequency knob. The bass and treble shelving EQ provides 15 dB of boost or cut.
The gain knob provides up to 20 dB of boost. The Digital Option Card provides 8 channels of AD and 2 channels of DA, turning your 1073OPX into a primary audio interface. This high fidelity transistor preamp adds a touch of studio magic to your bass or guitar, without imposing ugly artifacts on your tone. For a limited time, save 395 when you buy an AMS Neve 1073OPX 8-Channel Mic/Line Preamp and Digital Option Card Bundle. The Studio One authentically captures the character of the Neve 1073 console preamp.
At this time, I can't guarantee you'll get it in the typical Priority timeframe given the issues that USPS is experiencing. Will be packed safely (how I'd want to receive it) and shipped via USPS Priority. I'm the original owner pedal does have Velcro on the bottom. Unexpected medical bills have come through and that's the only reason I'm selling this, I waited months for one. Millennia HV-3D-8 Preamp 8 Channel $6,504.Mint condition, never played out, sat on the pedal board during COVID collecting dust.Millennia HV-3R Preamp 8 Channel Remote-Controllable $8,080.00.The 19” rack-mount 1U unit includes an external multi-voltage PSU and an optional Digital I/O module is available. The front panel now includes an integrated DI input, insert that offers true bypass, input and output level meters, and an additional input connector that accepts microphone or line level for easy and direct connection. The 1073SPX now has expanded features to better fit with today’s recording industry standards. The 1073SPX features a Neve 1073 class A design microphone preamp and the classic three-band EQ, which includes a fixed high-frequency shelf, two selectable bands with boost and cut capabilities, as well as a high pass filter. Designed and built in England, the Neve 1073SPX offers the same sonic qualities as the classic Neve 1073, and is produced with the exact same specifications and matched components. The legendary sound has been the secret ingredient to some of the top recordings over the last 40 years, all due to its big and punchy sound that compliments any genre of music – from rap to rock to classical. Since 1970, the Neve 1073 has been one of the most acclaimed preamps and EQs in the recording industry.
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