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Fredenstein Magic Pre

Fredenstein Magic Pre

Fredenstein Magic Pre er et heftig skue! Og når "øyet" blunker til deg har du perfekt gain!! Men bak gimmicken skjuler det seg flere smarte løsninger og noen unike designløsninger. Selve gain-kretsen er diskret oppbygget, uten chip' er i signalveien, men med en egenutviklet krets som kalles OPA2, som sørger for uvanlig mye gaining (70dB) og med svært lave støyverdier. I klassisk 500-format, gir Magic Pre deg en helprofesjonell forforsterker til svært hyggelig pris.

Lagerstatus: På lager

kr 5 450,00


The MAGIC PRE microphone preamplifier's most obvious feature is the green glowing “magic eye” vintage vacuum tube for output level indication. The “Magic Eye” tube is perhaps the most attention grabbing visual feature of this preamp and something everybody notices in any rack. Besides being just fun and another way to impress clients, this visual treat complements the rich vintage character of the preamp. The “eye” closes near optimal output levels.

The preamp follows what may be thought of as a very traditional topology that uses both an input transformer and an output transformer. Both are high quality American made transformers. The steel-core output transformer in particular is a very important sound shaping component which helps produce a smooth vintage touch without being dark or just “mid-rangy” or mushy.

A single discrete amplifier is used for the active gain element and there are no chip based amplifiers in the signal path. To achieve an unusual high level of performance the circuit is based on our OPA2 discrete audio operational amplifier. As in all Fredenstein products, the OPA2 is not a copy of an older design, but is a completely new design manufactured in SMT technology with matched and integrated dual input transistors to guarantee vastly improved specifications compared to older designs. The OPA2, in the tradition of similar modules, is socketed and can be exchanged without tools. The industry standard pin-out makes it compatible with many other amplifier modules. A 2 MOhms high impedance direct input is located on the front-panel, it accepts unbalanced signals, the rear microphone input is automatically disconnected when a plug is inserted in the DI connector.

The features include a maximum gain of 70 dB, a 20 dB Pad, and Phantom-Power support, plus a new feature simply labeled “Color”. The “Color” switch is intended to produce some tube-like harmonic content that, while not calling attention to itself, can bring some sounds to life and bring them forward in the mix and seem to make them sound more detailed and dimensional. While the color circuit does increase distortion, the audible effect is subtle enough that few people would ever describe the effect as “distorted”.

As all Fredenstein products, the Magic Pre is designed by a German-American team and manufactured in Taiwan.

Teknisk informasjon

Magic Eye Level Indicator: This is a vintage 6E5C vacuum tube that is designed to display optimum signal conditions. In this case, we use it to show the mic preamp output level. The “eye” is wide open (about 90 degrees unlit and 270 degrees softly glowing green) when there is no signal and and begins moving 30 dB below DFS or clipping (-15 dBu output). The “eye” closes as the signal level increases and the two edges gradually approach each other until they overlap slightly. Where they don't quite overlap or where the “eye” closes completely represents +15 dBu typically and is analogous to a bar graph meter going into the yellow. This may be considered a near optimum level. When there is noticeable overlap, consider it similar to going into the red and maybe levels may too hot. Keep in mind, that this indicator is not precise and for true precision you should rely on the meters of your A to D converter, and the Magic Eye indicator is a visual tool and for optimal audio performance one might be advised to always use one's magic ears. With a few minutes of practice, you should find the Magic Eye tube to be about as useful as most meters and more fun than most.

Frequency Response:     20 Hz – 40,000 Hz, +/- 1 dB
Distortion 1kHz :            < 0.03% at +4 dBu output level
                                    < 0.015% at +20 dBu output level
                                    < 0.04% at +26 dBu output level (clips at +28 dBu)
50Hz :                           < 0.08% at +4 dBu output level
                                    < 0.08% at +20 dBu output level
10kHz :                         < 0.02% at +4 dBu output level
                                    < 0.05% at +20 dBu output level
Input Noise : < -127 dB
Input Impedance : > 1600 Ohms
DI Impedance : > 2 MOhms
Max. Input Level : + 10 dBu, Pad activated
Max Input Level DI : + 18 dBu unbalanced
Output Impedance : 600 Ohms
Max. Output Level : + 26 dBu
Input Attenuator : - 20 dB (switchable)
Maximum Gain (XLR) : 70 dB
Minimum Gain : 35 dB
Minimum Gain 20 dB PAD engaged : 15 dB
Maximum Gain (DI) : 42 dB
Minimum Gain : 8 dB
Minimum Gain 20 dB PAD engaged : -12 dB
Current draw : +100mA, -160mA
Color Engaged Distortion : approximately 0.1% at -10 dBu output level