Schertler offers two preamplifiers, each with Class-A constant current technology to provide stable power to the system and, in some cases, to the instrument transducer. All SHERTLER outboard products are conceived and designed to provide the highest level of audiophile performance in demanding on-stage applications.
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A PRE
The A-PRE preamplifier has been specifically conceived to guarantee the best possible performance of our A-DYN sensor in any musical context.
Thanks to A-PRE you have possibility to research the desired sound with the help of the ROLL-OFF filter, a 3 step gain. In case of feedback problems we designed a phase switch to remove it.
The low impedance, A-Class electronics guarantee a high quality signal as a professional audio level.
STAT PRE
The Schertler STAT-PRE preamplifier is the perfect choice for use with the Schertler series of electrostatic transducers for classic stringed instruments. Compact, versatile and easy to use, choose STAT-PRE to power electrostatic pickups while allowing control of volume. Class-A constant-current design ensures faithful sound reproduction while delivering nearly 500 hours of playing time from one 9-volt battery. STAT-PRE has a rugged cast aluminum case which can be positioned as a floor unit or equipped with a belt clip.
| STAT-PRE SPECIFICATIONS | |
| FREQ. RESPONSE | 20Hz to 20KHz |
| MAX. OUTPUT | +8dBu |
| NOMINAL OUTPUT LEVEL | 0dBu |
| MAX. GAIN | 18dB |
| MAX. INPUT | 0dB |
| THD+N | <0.06%, -10dBu |
| INPUT IMPEDANCE | 25 kohm |
| OUTPUT IMPEDANCE | 190 ohm |
| SUPPLY | 9V |
| WEIGHT | 0.16 Kg |
| DIMENSIONS | 103x55x25 mm |
| 0dBu <=> 0.775V | |
PRE-A III
Especially designed for use with all Schertler electrostatic and electrodynamic transducers, PRE-A III is a compact preamplifier loaded with features. Individual controls include Gain, Bass, Treble, Resonance (180 Hz attenuation) and Volume.
PRE-A III accepts both XLR and 1/4" jack inputs and provides both "dry" and equalized outputs. It provides phantom power to the BLUESTiCK Marine system and STAT series pickups. Class-A constant current design and a regulated AC power supply mean a strong instrument signal at all times is delivered to the sound system.
| TECHNICAL SPECIFICATIONS FOR MAIN OUTPUT | |
| FREQ. RESPONSE | 10Hz to 50KHz |
| MAX. OUTPUT | +15dBu |
| NOMINAL OUTPUT LEVEL | 0dBu |
| MAX. GAIN | +41dB |
| OUTPUT IMPEDANCE | 10 ohm |
| 0dBu <=> 0.775V | |
| TECHNICAL SPECIFICATIONS FOR DRY OUT | |
| FREQ. RESPONSE | 14Hz to 50KHz |
| MAX. OUTPUT | +10dBu |
| NOMINAL OUTPUT LEVEL | -12dBu |
| MAX. GAIN | +19dB |
| OUTPUT IMPEDANCE | 100 ohm |
| 0dBu <=> 0.775V | |
| TECHNICAL SPECIFICATIONS FOR PRE-A III | |
| MAX. INPUT | -7dBu (ideal for passive and MIC signals) |
| Signal To Noise Ratio | 102dB |
| THD+N | 0.05% @ -20dBu, 1KHz |
| INPUT IMPEDANCE | 10 kohm |
| SUPPLY | 12V DC power supply |
| WEIGHT | 0.450 Kg |
| DIMENSIONS | 120x120x35 mm |
| 0dBu <=> 0.775V | |
ACTIVE DI
It will allow you to connect the output from acoustic and electric guitars, guitar amps, keyboard, mixers, tape machines and just about anything else directly to the mixer, without using a microphone, and with no hum loops.