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Description
The new BLUETUBE DP two channel microphone/instrument preamplifier with Dual Path technology delivers the best of both worlds offering a solid state preamplifier stage and a tube preamplifier stage in each channel. This new Dual Path feature delivers the most flexible preamplifier in its price range by delivering both fat warm tube tone or invisible solid state transparency. Each channel of the BLUETUBE DP includes a -20dB pad, polarity reverse, 80Hz filter, and +48v phantom power. Front panel controls include solid state GAIN control and switchable on/off TUBE DRIVE. When the TUBE DRIVE is clicked off, the tube preamplifier stage is bypassed delivering ultra-quiet and transparent preamplification. The front panel also includes illuminated analog VU meters for each channel for easy visual monitoring.
The BLUETUBE DP's inputs are professional-quality Neutrik Combo connectors for inputting both XLR and 1/4' TS sources. Outputs include both XLR and TS jacks allowing for ultimate flexibility.
The PreSonus BLUETUBE Dual Path is great for enhancing all types of microphones including condensors, dynamics and ribbons, as well as instruments including keyboards, acoustic and electric guitars and bass. The BLUETUBE DP is the perfect front-end preamplifier for any project studio delivering a wide range of sounds and tonality all at an amazingly affordable price.
Technical Specifications
Input
- Connector Type : Neutrik™ Combo
- XLR Impedance : 1.3K Ohms
- Hi-Z, 1/4' : 1 Meg Ohms
Output
- Connector Type : XLR and 1/4' TS
- Impedance : 51 Ohms
Panel Controls
- Gain : 0dB to +54dB
- Tube Drive : 0%to 100%
- Phase Reversal
- -20dB Pad
- Phantom Power
Physical
- Weight : 4lbs
- Dimensions : 8' x 5' x 1.75'
- Mounting : Universal rack tray insert
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The PRE-73 DLX is a one-channel vintage style microphone-, line- and instrument preamplifier. The signal path uses only discrete components like resistors, capacitors and transistors. The line and microphone input and the line output are transformer balanced, using three different transformers, each one optimized for its purpose.
This is the way audio components were built before integrated circuits became available. The subjective sound quality delivered by vintage equipment is often prefered over the one delivered by modern units, a situation that is even more obvious now when music is recorded with clean-sounding digital audio equipment.
The circuit used in the PRE-73 DLX is similar to the preamp section in the classical 1073 module with a corresponding sound character that is warm, punchy, sweet and musical. These classic characteristics have been heard on countless recordings through the years and it is a versatile sound that works very well on most sound sources and in most genres. The essence of this sound is now available at a surprisingly low cost, making it available to nearly everyone.
FEATURES
- Vintage Style electronics. No intergrated circuits in the signal path.
- Maximum gain on the mic input is 80 dB, enough to handle passive ribbon mics with quiet sound sources.
- Gain range on the Line input: -20 to + 10 dB.
- Switchable impedance on the mic input, 1200 or 300 Ohms, will change the tone of most mics.
- Switchable phantom power and absolute phase.
- A high-impedance instrument input for any sound module, electric guitar or bass.
- A simple but effective 4-step LED output level meter.
- The output level controls makes it possible to make fine gain adjustments and also to overload the main gain stage(s) for more character and then lower the signal to a suitable level before the output stage.
- Combo XLR/TRS input jacks and separate output XLR and TRS jacks for flexible connections.
- Insert jack for inserting EQ´s and other units.
- External high power power supply to avoid interaction with the audio circuits and transformers.
- A solid build quality that will last many years of normal use.
The PRE-73 DLX has a number of improvement and new features compared to the PRE-73 MKII:
- Tantalum capacitors in the signal path.
- Selectable 1073-style high pass filter, 50Hz, 80Hz, 160Hz and 300Hz.
- Output Attenuator -7, -14, -21 and -28 dB (located after the output transformer) allows overdriving the output stage and the output transformer for added character by lowering the output signal to a suitable level.
- The circuit board is prepared for Carnhill Mic and Line transformer and high pass inductor.
- The Insert jack can be switched in/out from the front panel. An internal jumper can select that the Insert jack always has an output signal.
- Switchable 600 ohm Output Termination and Ground Lift on the back panel.
- Selectable Active or Passive DI input and selectable input impedance in active mode, Hi Z or 100 kohm, by internal jumpers.
- The DI can signal can be selected to pass or bypass the mic input transformer by internal jumpers.
- Relays are used to control internal switching for DI input, Phantom power, Mic Low Z, Insert and Phase for shorter circuit board signal paths. The relays are controlled by front panel switches.
- Revised gain switch for added headroom.
- Circuit board star grounding scheme.
- Revised power supply with separate regulators for the audio circuits and relay and LED circuits.
| Vacuum Tube Mic Preamp. 12AX7 Vacuum Tube. +48V Phantom Power, 20dB Pad.
This premium tube mic/line preamp features an integrated limiter for studio,
live and hard disk recording applications. It features a carefully-selected
12AX7 vacuum tube with Behringer's UTC technology for exceptional warmth
and lowest noise. Using the MIC100 is a great way to eliminate the "dull"
sound of standard digital recorders & sound cards. Also, it perfectly
complements studio-grade condenser mics. When used as a high-end DI-box,
it ensures outstanding signal integrity. Features also include a phase reverse
switch, +48 V phantom power, a 20 dB pad, and balanced I/O.
The heart of the Tube Untragain is an extremely low-noise microphone preamp
circuitry that uses discrete components and produces a highly trans-parent
sound. In combination with Behringer's tube technology, the operational amplifiers
4580 and a sophisticated circuit topology, the Tube Untragain yields excellent
noise and distortion properties. The innovative UTC circuitry that has been developed
by our engineering team offers an abundance of sound-shaping possibilities.
Absolute musicality was Behringer's major goal when we designed the Tube
Untragain. The result is a device that, thanks to our tube circuitry, lends an
incredible punch to percussion instruments. On the other hand, instruments
that are rich in upper harmonics will receive more transparency. The sound
will be warm, detailed and brilliant.
Technical Description
Specifications
XLR input Connector: Balanced/unbalanced
Type: Transformerless, DC-decoupled input
Impedance: Approx. 2 kOhms
Maximum input level: +7 dBu / 20 dB with pad
1/4 in. TRS input Connector: Balanced/unbalanced
Type: Transformerless, DC-decoupled input
Impedance: Approx. 1 MOhms
Maximum input level: +16 dBu / 20 dB with pad
Audio outputs Connectors: XLR and 1/4 in. TRS connector balanced/unbalanced
Type: Transformerless, DC-decoupled output
Impedance:
Approx. 700 Ohms balanced
Approx. 350 Ohms unbalanced
Maximum output level: Approx. +26 dBu @ 100 k§?
System Frequency Response Mic input: |
Two channel classic Focusrite ISA transformer-based preamps Front panel, per channel: - 1/4" instrument input
- Variable input impedance - Low, ISA 110, Medium, High
- Input selection - Mic, Line, Instrument
- 0 - 30 dB/30 - 60 dB gain switch
- Phantom power switch
- Phase invert switch
- 0 - 60 dB gain in 10 dB steps
- 0 - +20 dB continuously variable trim
- Variable high-pass filter with on/off switch
- Insert point on/off switch
- Eight-LED user-calibrated level meters
- Single power switch
Rear panel, per channel: - XLR-F mic inputs
- 1/4" TRS line inputs
- 1/4" TRS Sends
- 1/4" TRS Returns
- XLR-M line output
- Single peak meter calibration dial
- Single IEC power socket
Measured Performance Maximum Input and Output Levels | Maximum Output Level |
+24 dBu with a THD+N
| Maximum Microphone Transformer Input Level | +7 dBu with a THD+N | Mic Input Response | Gain range | 0 dB to +60 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trim |
Input Impedance
| Switched Impedance setting
Equivalent Input Impedance at 1 kHz | Low = 600 Ω
ISA 110 = 1.4 kΩ
Med = 2.4 kΩ
High = 6.8 kΩ | EIN
(Equivalent Input Noise) | Measured at 60 dB of gain with 150 Ω
source impedance and 22 Hz-22 kHz band pass filter | -127 dB |
Noise
| Noise at output with unity gain (0 dB) and 22 Hz-22 kHz band pass filter | -97 dBu |
Signal-to-Noise Ratio
| Measured with 150 Ω source impedance and 22 Hz-22 kHz band pass filter | 121 dB relative to max output +24 dBu |
Total Harmonic Distortion + Noise
| Measured with a -20 dBu input signal at +30 dB of gain and with a 22 Hz-22 kHz band pass filter |
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Frequency Response
| At minimum gain (0 dB) |
-0.5 dB at 10 Hz,
-1 dB at 135 kHz, relative to 1 kHz
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At +60 dB gain
| -6 dB at 10 Hz,
-1 dB at 115 kHz, relative to 1 kHz |
CMRR (Common Mode Rejection Ratio)
| -94 dB for mic input at 60 Hz for max. output = +24 dBu
-91 dB for mic input at 10 kHz for max. output = +24 dBu |
Crosstalk Channel to Channel
| Mic input, with I/P = 0 dBu, gain = 0 dB @ 1 kHz input to channel A, channel B output = -85 dB | Line Input Response |
Gain Range
| -20 dB to +10 dB in 10 dB steps, plus 0 dB to +20 dB continuously variable trim |
Input Impedance
| 10 kΩ from 10 Hz to 200 kHz |
Noise
| Noise at main output with gain at unity (0 dB) measured with 50 Ω source impedance and a 22Hz - 22 kHz band pass filter |
-97 dBu
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Signal-to-Noise Ratio
| Measured with 50 Ω source impedance and a 22 Hz-22 kHz band pass filter |
121 dB relative to max output +24 dBu
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Total Harmonic Distortion + Noise
| Measured with a 0 dBu input signal, +10 dB of gain and a 22 Hz-22 kHz band pass filter |
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Frequency Response
| At unity gain (0 dB) | -0.3 dB at 10 Hz,
-1 dB at 80 kHz, relative to 1 kHz |
Crosstalk Channel to Channel
| Line input, with I/P = 0 dBu, gain = 0dB
@ 1 kHz input to channel A |
Channel B output
= -91 dB
| Instrument Input Response |
Gain Range
| +10 dB to +40 dB continuously variable trim |
Input Impedance
| > 2 MΩ |
Noise
| >Measured with 22 Hz-22 kHz band pass filter | Minimum gain (+10 dB) = -95 dBu |
Frequency Response
| At minimum gain (+10 dB) |
-0.1 dB at 10 Hz,
-1 dB at 115 kHz, relative to 1 kHz
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At maximum gain (+40 dB)
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-2.5 dB at 10 Hz,
-1 dB at 110 kHz, relative to 1 kHz
| High-Pass Filter |
Roll-Off
| 18 dB per octave (3 pole filter) |
Frequency Range
| Continuously variable from 16 Hz to 420 Hz (-3 dB) | Weight and Dimensions |
W x D x H
| 480 mm x 280 mm x 44 mm |
Weight
| 3.7 kg |
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The CPR12 is an easy to use, flexible and multifunctional 10 channel pre-amplifier. Six of these input channels are selectable between Mic / Line level and equipped with a 3 band tone control. The first two can be switched to priority and phantom power. The other four channels are direct line inputs. Every input channel has its own gain and fader volume control with PFL button which makes it possible to pre-listen each input or output channel with the built-in pre-listening speaker, and can be routed to one or both output channels. This makes the CPR12 a full two-zone system. Other present features are a priority input, a recording output, separate sub-out channels and the 24 V DC emergency power connection. This last feature makes it possible to power the CPR12 with emergency power when the main power is shut down. In this case, the priority input will automatically mute all input signals, and a evacuation message will be announced. The steel 19" housing has a height of 2 HE. - 10 audio input sources
- 6 Mic / Line inputs with 3 band EQ
- 4 Direct Line Inputs
- Fader volume control
- Two output zones
- Built-in pre-listening speaker
- Priority input for emergency situations
- + 15 V DC Phantom power
- Works on 24 V DC emergency power
Specifications - Model Name / Type: CPR12 / 10 channel 2 zone pre-amplifier
- THD+N:
- Signal/Noise: > 90 dB
- Frequency Response: 20 Hz - 20 kHz
- Phantom Power: + 15 V DC
- Emergency Power: + 24 V DC
- Power Supply: 100 - 240 V AC / 50 - 60 Hz
- Dimensions (W x H x D): 420 x 88 x 320 mm
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At PreSonus, weʼve been designing preamps for a long time, and we always focus on audio quality first. So when we decided to upgrade our popular TubePre V2, we focused on improving an already high-quality sound—without jacking up the price. Like the originalTubePre, the new version is a fully professional tube preamp, with a dual-servo (no capacitors) gain stage that lets you boost the program signal to smoking hot levels without significantly increasing the background noise. Discrete components and high-voltage operation offer dynamic range and detail not found in other single-channel tube preamps in its class.
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. Weʼve 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.
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