Products PRE PHONO

PRE PHONO

After two years in development, Audia Flight is proud to introduce their new PHONO preamp. A separate power supply, the dedicated input preamplifier boards, the high gain (74dB in its maximum selection), the low noise are only few of the characteristics.

Of course the separate power supply was chosen to improve the shielding of the preamp and to reduce to zero the vibrations and resonance from the transformers. In order to have good performance, a very well made power supply is a mandatory. On our phono preamp the power supply is separate from the preamp chassis. A 50VA toroidal transformer supplies the analogue stages. On it is placed the first power supply (+/- 38V). Inside the separate power supply there is a 15VA toroidal transformer as well, to supply the relays and logic control. A memory stores all the selections made. To receive the commands from the pushbutton of the preamp chassis without electrical connections, several opto-isolators are used. The Audia Phono preamp is based on our current feedback philosophy; the input preamp boards are different, for MM or MC cartridges, because the MM or MC cartridges have different electrical characteristics. The MC input preamp board has a 60dB gain. It is a transistor input preamp, with ultra low noise and very low offset output. The MM input preamp board has a 40dB gain. It is a differential transistor input stage, with very low noise and very low offset output. On both input boards the impedance selectors are very close to the input stage and it is made by professional gold jumpers. Custom resistors can also be used for precise cartridge matching. This is also done from the rear panel. After the first gain stage, there is the input selector, made with gold contact relays. Following the signal, there is the RIAA filter, made in passive configuration. The RIAA filter is made with 1% polypropylene and polystyrene capacitors. In this position, it’s possible to select a subsonic IEC filter as well. The second gain output stage is made with our last release of current feedback. The module, called MCF NG1, is completely redesigned, has improved signal to noise ratio and more improved speed. On the second gain stage it is possible to change the gain, from 24dB to 34 dB. The second gain stage has a XLR balanced output as well. A mono selector can be an important element in achieving the best sound, while playing a mono record and using a stereo cartridge on the turntable. Our mono selector sums the left and right channels together in the same manner as a mono cartridge would and will provide much better sonic performance. On the preamp chassis, there are a low noise mosfet power supply (+/-28V) for the second gain stage and another power supply for the first gain stage (+/-15V), so, in total, there are six power supplies. On the preamp board there is an offset protection; in case on the output there is a DC offset voltage, the unit will go in protection, saving the unit and all units connected to it. It is possible to order the Audia Phono preamp with the input gain board desired (MM and MC, or two MM inputs, or two MC inputs). Moreover, it’s also possible to change the input gain board of the second input in the future as well.

Technical Data
Gain : MC 64 dB + 10 dB (74 dB in total) / MM 44 dB + 10 dB (54 dB in total)
Frequency response (1Wrsm, -3db) : 5Hz - 120KHz
THD : <0,05%
S/N ratio : >90dB “A” weighted
RIAA accuracy : +/- 0,1 dB
Channel Unbalance : <0,04 dB
Stereo separation : >95 dB @ 10 KHz
MC input impedance : from 7 ohm to 980 ohm in eight step plus a custom resistor value
MM input impedance : from 47pF to 600 pF in twelve step plus a custom capacitor value
Output impedance All outputs : 500 ohm
Phase : Non inverted
Maximum consumption: 65W
Dimensions and weight : 420x92x330mm (WxHxD), 10,5 Kg
Shipping dimensions and weight : 570x270x570mm (WxHxD), 13 Kg

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