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Aphex 207D Tube Microphone/Instrument
Preamp with Digital Out -
More Info
The 207D adds AES/EBU and S/PDIF
digital outputs to the popular 207 tube preamp, providing direct digital
connection throughout your signal chain, with up to 96kHz sampling
rates. The 207D also adds word clock for digital clocking
synchronization.
The 207D is an audiophile-quality 2-channel tube mic preamp designed to
reveal the subtlety and power of vintage condensers, ribbons, electrets,
and popular dynamic mics. MicLim™ circuitry offers virtually crashproof
performance making it a perfect front end for digital recorders. An
insert loop is provided for adding effects prior to conversion. Offers
up to 65dB of continuously variable gain, 48V phantom power, polarity
select, -20dB pad, low cut filter switches, switchable -10dBv or +4dBu
operating levels, balanced XLR and TRS I/O, and a delayed turn-on
circuit for speaker protection.
It makes use of patented Reflected Plate Amplifier™ (RPA) technology, 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.
|
AUDIO |
| Frequency Response |
+0, -0.5dB 30Hz - 30
kHz |
| EIN |
-129dBu (input
shorted) |
| Crosstalk (10 Hz - 22kHz) |
-79 dB or better |
| THD (10 Hz-22kHz at -11dBfs) |
< 0.18% |
| Tube Type |
12AT7 / ECC81 Dual
Triode |
|
MIC INPUT |
IF
OPERATING LEVEL SET TO +4 dBu |
IF
SET TO -10dBv (-7.8dBu) |
| Connector |
XLR-3F |
same |
| Type |
Transformerless, NPN active
balanced |
same |
| Balanced |
2k ohms nominal |
same |
| Maximum Level |
0 dBu |
+12.5 dBV (+14.8 dBu) |
| CMRR |
Greater than 70dB @ 60 Hz |
same |
| Nominal Preamp Gain |
20 to 65dB minus OUTPUT TRIM loss |
8 to 53 dB minus OUTPUT TRIM loss |
|
INSTRUMENT INPUT |
| Connector |
1/4" Phone Jacks |
same |
| Type |
Unalanced JFET amp |
same |
| Input Z |
1M ohm nominal |
same |
| Maximum Level |
10V RMS |
same |
| Nominal Preamp Gain |
infinity to 65dB minus OUTPUT TRIM
loss |
infinity to 38dB minus OUTPUT TRIM
loss |
|
OUTPUT |
| Connector |
XLR-3M and 1/4" TRS Phone Jacks |
|
| Type |
Impedance balanced (may be used
unbalanced) |
|
| Output Z Balanced |
XLR: 66 ohms - TRS: 1200 ohms |
|
| Output Z Unbalanced |
XLR: 33 ohms - TRS: 600 ohms |
|
| Nominal Level |
+4 dBu |
-10dBv (316 mVRMS) |
| Maximum Level |
+21dBu Unloaded |
+6.75 dBV Unloaded |
| Output Trim |
0 to -12 dB |
same |
|
INSERT |
| Connector |
1/4" TRS Phone Jack |
| Send |
Tip |
| Return |
Ring |
| Nominal Operating Level |
-10dBv (316 mVRMS) |
| Point of Insertion |
Between front-end and
Tube Output Stage |
|
OTHER SPECIFICATIONS |
| Power requirements |
90-250 VAC 50-60 Hz
12W |
| Dimensions |
19"W x 1.75"H x 8.25"
D 1 Rack U (482.6mm x 44.5mm x 209.6mm) |
| Depth behind front panel |
7.5" (190.5 mm) |
| Net Weight |
6 lbs (2.73 kg) |
| Shipping Weight |
9 lbs (4.1 kg) |
|
