Many other companies that offer mobile recording interfaces add the cheapest possible microphone preamplifier as an afterthought. In contrast, the FireStudio Mobile includes custom-designed, high-voltage, discrete, XMAX Class A microphone preamplifiers that are suitable for use with all types of microphones. The job of a microphone preamplifier in an audio interface is to boost a microphone-level signal to line level before conversion to the digital domain. A good preamp boosts the level to almost 400 times that of the original signal, making the preamp one of the most important stages in an interface. A cheap, off-the-shelf, op-amp-type mic preamp delivers thin, noisy, harsh results.
But with XMAX preamps, the sonic quality is limited only by what microphone you plug into it. XMAX preamplifiers are built with three key elements. The XMAX preamplifier runs on power rails of 30V. Most off-the-shelf, op-amp-based designs run on power rails of 10V to 18V. Higher-voltage power rails deliver more headroom, deeper lows, smoother highs, and a richer overall sound.
We only use genuine transistors, resistors, and capacitors. Op-amps add noise, coloration, and harshness to a signal. Our discrete design delivers ultra-low noise and transparency. Class A circuits have no crossover distortion and deliver purer, clearer, and more musical results than the Class AB designs that are found in many preamps. The net result of the XMAX preamp design is high headroom, low noise, wide dynamic range, extended frequency response, and-most important-musicality and transparency, with smooth highs, solid deep lows, and everything in between.
12AX7 Vacuum Tubes The 12AX7 is a miniature dual-triode vacuum tube with high voltage gain that was developed around 1946 by RCA engineers. It was first released for public sale in 1947 - and hasn't changed design since. Part electronic fabrication, part glass-blowing, and part voodoo, tube manufacturing is nearly a lost art - only four major factories in the world still produce the 12AX7!
All 12AX7 vacuum tubes are not created equal, so the tubes we use in the TubePre V2 are hand-selected and carefully tested. The tube in the TubePre V2 was hand-selected and carefully tested for electrical conformity and freedom from microphonics. Microphonics occur when the charged elements in a vacuum tube vibrate, changing the distance between the elements. This causes charges to flows in and out of the tube, as they do in a condenser microphone, creating electrical noise and, potentially, feedback. Versatile and Feature-Rich Housed in a rugged case, the TubePre V2 rear panel sports separate unbalanced, ¼" instrument and balanced, XLR mic inputs and unbalanced ¼" and balanced XLR line outputs.
We've included all of the extras you need for professional operation including a high-pass filter, phantom power for condenser mics, polarity reverse switch, and a backlit VU meter. The TubePre V2 is more than a mic preamp, though. Thanks to its separate instrument and mic inputs, it also serves as a dynamite direct box (DI) for guitars and basses. And it's small enough to carry almost anywhere, although you also can screw-mount it to a standard rack tray.So if you are a fan of our original TubePre, you're going to love the improved TubePre V2. And if you are checking out the TubePre for the first time, your ears are in for a real treat. Then check out the amazing low price-but sit down first because you're in for a shock. Because with PreSonus, big sound does not have to cost big bucks.
Presonus TubePre V2 Vacuum Tube Preamp. XMAXT Class A preamp input stage. 12AX7 dual-servo vacuum tube output stage. 1 unbalanced ¼ instrument input. 1 balanced XLR mic input.1 unbalanced ¼ line output. 1 balanced XLR line output. External 12 VDC, 1A power supply. Connector Type XLR, female, balanced. EIN -131 dB, 20 kHz BW, max gain, Rs=40O, A-wtd -128 dB, 20 kHz BW, max gain, Rs=40O, unwtd. Frequency Response 20 Hz - 20 kHz, -0.3 dB, +4 dBu, unity gain 5 Hz - 120 kHz, -3 dB, +4 dBu, unity gain. THD+N 0.01%, -10 dBu, 1 kHz, unity gain, 20 kHz BW, unwtd. Dynamic Range 115 dB, 1 kHz, unity gain, 20 kHz BW, A-wtd 107 dB, 1kHz, unity gain, 20 kHz BW, unwtd. Input Impedance 1.3 kO. Phantom Power +48 VDC, 10 mA.
Connector Type ¼ TS, female, unbalanced. Connector Types XLR, male, balanced ¼ TS, female, unbalanced. External Power Adapter +12 VDC, 1A, center-pin positive. PSU Barrel Dimensions 5.5 mm O.Dimensions 1/3U rack-mountable (screw-mount to standard rack tray, not included). Height 1.75 (44.45 mm).
Depth 5.5 (139.7 mm). Width 5.5 (139.7 mm). Best prices - We sell all Presonus Products at the lowest price as possible. Detailed information of all products.Lifetime Customer Service by Presonus Product Experts. Guaranteed legitimate and authentic merchandise. If your item is defective or you want to return it for any reason within the first 30 days of when it was delivered to you; you have the following options. We will send you a. To replace the item for a brand new one. All replacements and exchanges are free. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips".
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