Aurora Audio GT500 500-Series Preamp

The Aurora Audio GT500 Preamp can accommodate any signal you care to throw at it, including high-level line inputs. The sensitivity switch provides 100 dB of gain adjustment from +80 dB to –20 dB and the level pot allows for fine adjustments. The level pot has an audio taper and is –20 dB at half rotation.

If you have to turn the pot below half way, the sensitivity switch must be adjusted at least two clicks more to restore the signal level at the expense of input headroom! Operating the unit with the output level at maximum ensures that you keep the headroom in the designed 26 dB region.

The DI input overrides the normal input and has 10 Megohm input impedance and around 10 dB gain. It can be used (to great effect) with musical instrument pickups, but works equally well with high-level signals.

The High Pass Filter is selected by moving its toggle switch to the right and a blue LED will glow to indicate section. Four frequencies are provided: 47 Hz, 82 Hz, 150 Hz and 270 Hz for the selections.

SPECIFICATIONS

All Class A, discrete transistor, transformer coupled through-hole assembled (no surface mount)
Features Aurora's unique transformers and the same circuitry as the GTQ2/GTP8
All steel construction of the case and front panel provides shielding
Input Impedance: 1.2 kOhms, transformer balanced and floating
DI Input Impedance: 10 mOhms
Output Impedance: <75 ohms, transformer balanced and floating
Output Drive Capability: >+24 dBu into loads of 600 Ohms and upwards
Frequency Response: 20 Hz to >75 kHz ±3 dB
Distortion: <0.05% @ 0 dBu @ 1 kHz
Noise: -45 dBu @ 80 dB gain measured 22 Hz to 22 kHz
Current Draw: 100 mA normal operation, 130 mA every mode selected

US and EU parcels ship via UPS, ETA 1-7 working days from pickup day zero. That also applies to most locations worldwide.

All shipments are fully insured.

Bigger shipments requiring pallets or custom made crates ship to US, CA, JP, CN, AU and other outside of EU locations via DHL Air Freight, ETA is normally approx. 7-14 working days from pickup day zero.

Big shipments inside EU ship via different freight companies, recently mostly via ACE Logistics. Freight forwarders can use different courier companies for deliveries to final destinations.

Palletising and crating time can vary depending on the size of the shipment and packaging queue. We pack all our shipments with great care.

You are most welcome to pick your order up yourself from our Retrosonic Pro Audio showroom, studio and warehouse in Tallinn, Estonia.

We ship worldwide – contact us for a personal shipping quote or any other questions.

VAT (Value Added Tax) can be deducted if you have a company with a valid EU VAT number or if you're based outside of the EU. Non-EU buyers pay all and any import tax and duty as regulated by their local customs.