| BENEFITS |
Dramatically improves microphone performance |
Greater dynamic range and frequency response |
Dramatically improves instrument performance |
Fuller, more realistic sound |
Improved Detail and Intelligibility |
Record hotter tracks with the highest possible resolution |
Tighter lows; clearer up-front mids; Strong highs without edginess |
MicLim offers up to a 20dB increase in dynamic range and makes the Model
207D virtually crashproof |
Direct connection to digital mixers, DAW's and other digital equipment |
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| FEATURES |
Two independent low noise channels of tube amplification |
AES/EBU and S/PDIF digital outputs with up to 96k sampling rates |
Microphone and Instrument inputs on each channel |
MicLim on each channel |
Mic Input: 20 to 65dB of continuously variable
gain |
Instrument Input: -infinity to 65dB of continuously
variable gain |
Switchable 48 volt Phantom Power with ramp up
feature |
Delayed Turn On |
Polarity, 20 dB pad and Low Cut Filter switches |
LED Headroom Meter Display for each channel |
Switchable -10 dBv / +4 dBu operating level |
Balanced 3-pin and 1/4" TRS Inputs and Outputs |
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Internal Switch Mode Power Supply
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| PROPRIETARY CIRCUITRY |
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MicLim provides up to 20 dB of gain reduction. It is a custom
designed optical attenuator, located directly on the mic input line that
smoothly limits the microphone's output signal according to the MicLim peak
detector's control current. Since attenuation
comes prior to preamplification, the patented MicLim can increase the Model
207's effective headroom by up to 20 dB. MicLim detects the preamp's
output signal and instructs the input attenuator to proportionately reduce
the microphone's output level just enough to prevent clipping. MicLim has
no effect at all when the preamp's output level is not approaching clipping.
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Reflected Plate Amplifier The patented RPA is a true vacuum
tube circuit which has all the desired characteristics without the heat,
fragility, sonic variability, short life and high frequency roll-off of
conventional tube designs.
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OTHER INNOVATIVE FEATURES
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Delayed Turn-On - The power LED glows
orange while the Tube circuit is stabilized and all DC is eliminated (ensuring
no turn on thump which can seriously harm loudspeakers). When the LED turns
green the Model 207 is ready for optimum performance.
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Switch Mode Power Supply - this internal power supply will automatically
adjust to any line voltage making the 207 an excellent choice for touring
applications: no switches to throw, no jumpers to remember to set, etc.
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| For Recording Microphones
and Instruments |
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The Model 207D will capture
the subtleties of voices and instruments that are missed by the inexpensive
mic preamps fpund in most audio consoles, DAW's and other standalone preamps.
This detail, dimension and space will greatly improve the overall "sound"
of your recordings. With this improvement in realism comes an enhanced presence
allowing for easier placement in the final mix. For recording instruments
a typical mono tube direct box (DI) sells for about the price of a model
207 and we'll give you two great DI's plus two great mmic preamps,
more useful features and Aphex quality all in one box! MicLim allows you
to utilize every last bit of digital resolution for the most dynamic recordings
possible.
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| For Live Sound, Touring
PA, and Fixed Installations |
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The 207D can bring anything
miked up out of the mix by greatly improving detail and presence. Vocals
and instruments will have a noticeable improvement in clarity and depth
when switched to a Model 207. The Switch Mode power supply offers stable
performance even with unstable mains voltages. MicLim eliminates those desperate
lunges over the mixing desk to trim back overloaded preamps.
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| For Broadcasting and Webcasting |
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Typical Broadcasting and Webcasting
chains reduce the clarity and detail of an audio signal. Thie is especially
damaging to voice presence and intelligibility. Voices miked through the
207D will better retain their original character and impact. MicLim ensures
a strong undistorted sound that will still sound good out of a computer
speaker, car radio, or high fidelity system.
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| As a "Direct Box" |
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For bass, acoustic guitar and
keyboards the Model 207D's low-noise, wide frequency response and tube warmth
allow each instrument's unique character to be captured. The MicLim circuit
works on the instrument input also, protecting against overload distortion.
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| SPECIFICATIONS - Aphex
Model 207D - Tube Microphone and Instrument Preamp |
| AUDIO |
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Frequency Response |
+0, -0.5dB 30Hz - 30
kHz |
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EIN |
-129dBu (input shorted) |
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Crosstalk (10
Hz - 22kHz) |
-79 dB or better |
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THD (10
Hz-22kHz at -11dBfs) |
< 0.18% |
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Tube Type |
12AT7 /
ECC81 Dual Triode |
| MIC
INPUT |
IF
OPERATING LEVEL SET TO +4 dBu |
IF
SET TO -10dBv (-7.8dBu) |
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Connector |
XLR-3F |
same |
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Type |
Transformerless, NPN
active balanced |
same |
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Balanced |
2k ohms nominal |
same |
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Maximum Level |
0 dBu |
+12.5 dBV (+14.8 dBu)
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CMRR |
Greater than 70dB @
60 Hz |
same |
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Nominal Preamp Gain |
20 to 65dB minus OUTPUT
TRIM loss |
8 to 53 dB minus OUTPUT
TRIM loss |
| INSTRUMENT
INPUT |
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Connector |
1/4" Phone Jacks |
same |
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Type |
Unalanced JFET amp |
same |
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Input Z |
1M ohm nominal |
same |
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Maximum Level |
10V RMS |
same |
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Nominal Preamp Gain |
infinity to 65dB minus
OUTPUT TRIM loss |
infinity to 38dB minus
OUTPUT TRIM loss |
| OUTPUT |
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Connector |
XLR-3M and 1/4"
TRS Phone Jacks |
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Type |
Impedance balanced
(may be used unbalanced) |
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Output Z Balanced |
XLR: 66 ohms - TRS:
1200 ohms |
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Output Z Unbalanced |
XLR: 33 ohms - TRS:
600 ohms |
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Nominal Level |
+4 dBu |
-10dBv (316 mVRMS) |
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Maximum Level |
+21dBu Unloaded |
+6.75 dBV Unloaded |
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Output Trim |
0 to -12 dB |
same |
| INSERT |
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Connector |
1/4" TRS Phone
Jack |
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Send |
Tip |
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Return |
Ring |
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Nominal Operating Level |
-10dBv (316 mVRMS) |
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Point of Insertion |
Between front-end and
Tube Output Stage |
| OTHER
SPECIFICATIONS |
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Power requirements |
90-250 VAC 50-60 Hz
12W |
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Dimensions |
19"W x 1.75"H
x 8.25" D 1 Rack U (482.6mm
x 44.5mm x 209.6mm) |
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Depth behind front panel |
7.5"
(190.5 mm) |
| |
Net Weight |
6 lbs (2.73
kg) |
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Shipping Weight |
9 lbs (4.1
kg) |
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