Trade Up Program
Pre420 Specifications
Microphone Preamps
| Number of Preamps | 4 |
| Connectors |
Gold-Pin Neutrik™ female XLR with direct ground feature |
| Grounding | Direct bonding of pin 1 to chassis |
| Input Impedance (with pad off) | 8.1k Ohms |
| Input Impedance (with pad on) | 1.37k Ohms |
| Gain Range (with pad off) | 22 dB to 60 dB (to direct outputs) |
| Gain Range (with pad on) | 2 dB to 40 dB (to direct outputs) |
| Maximum Input Level (with pad off) | +7 dBu (+4.8 dBV, 1.7 Vrms) |
| Maximum Input Level (pad on) | +27 dBu (+24.8 dBV, 17.4 Vrms) |
| Phantom Power | +48V with individual switches |
| High-Pass (rumble filter) | 40 Hz second-order 12-dB/octave |
| RF Protection | CMF1™ common-mode choke |
| Preamp Bandwidth |
-0.02 dB at 10 Hz -0.17 dB at 200 kHz - 3 dB at 500 kHz |
|
EIN at 60 dB Gain (20 Hz to 20 kHz) to any output |
-128 dBu at 150 Ohms -131 dBu at 40 Ohms -133 dBu at 0 Ohms |
|
THD+N (1 kHz, BW=20 kHz) to any output at +27 dBu |
-112 dB, 0.00024% at 22 dB Gain -110 dB, 0.0003% at 35 dB Gain -108 dB, 0.00038% at 40 dB Gain -101 dB, 0.00085% at 55 dB Gain |
|
IMD (50Hz and 7 kHz) to any output at +24 dBu |
-104 dB, 0.0006% at 35 dB Gain -104 dB, 0.0006% at 40 dB Gain |
Direct Outputs
| Number of Outputs | 4 |
| Connectors |
Gold-Pin Neutrik™ male XLR with direct ground feature |
| Output Impedance |
60 Ohms Balanced 30 Ohms Unbalanced (pin 3 floating) |
| Maximum Output Level without clipping | +29.5 dBu |
| Drive capability at rated THD+N | 300 Ohms |
| Output Type |
Transformerless Voltage and Impedance Balanced |
Control Room and Main Outputs
| Number of Outputs |
4 total 2 control room 2 main |
| Connectors |
Gold-Pin Neutrik™ male XLR with direct ground feature |
| Output Impedance |
60 Ohms Balanced 30 Ohms Unbalanced (pin 3 floating) |
| Maximum Output Level without clipping | +29.5 dBu |
| Monitor Gain Control L/R Balance |
± 0.01 dB at full clockwise rotation ± 0.3 db at middle of rotation |
| Drive capability at rated THD+N | 300 Ohms |
| Output Type | -126dBu |
| EIN @ 60dB Gain, 20Hz-20kHz, Inputs Common |
Transformerless Voltage and Impedance Balanced |
MirrorPan™ Constant-Power Pan Circuit
| Number of pan controls | 4 |
| Pan Law | 3-dB (constant power to stereo out) |
| Deviation from Constant Power | ± 0.25 dB |
| Channel Separation when Fully Panned | > 71 dB |
| Balance at Center Detent | ± 0.25 dB |
| THD+N | Better than -112 dB, 0.00024% |
HPA2™ Headphone Amplifier
| Number of Outputs | 1 |
| Connector | 1/4" TRS with switch contacts |
| Output Impedance | 0.11 Ohms, 10 Hz to 200 kHz |
| Maximum Output Level at 0.001% THD+N |
+23.5 dBu into 600 Ohms (0.24 W) +19.5 dBu into 30 Ohms (1.78 W) |
| Maximum Output Current | 250 mA |
|
Overload Protection (independent per channel) |
Current limited at 300 mA Thermal Shutdown |
| Bandwidth |
> 500 kHz -0.014 dB at 10 Hz -0.013 dB at 200 kHz |
| THD+N |
-106 dB, 0.0005% into 30 Ohms at +18dBu (1.26 W) |
LED Status Indicators and Meters
| +48V Phantom Indicators | 4 |
| Solo Warning Indicator | 1 |
| Power Indicator | 1 Blue |
| Meter Indicators | 6 Dual LED Meters |
| Meter Locations |
4 microphone inputs 2 main outputs |
| Meter Specifications |
Green LED: intensity modulated signal presence threshold = -8 dBu, full brightness at +24 dBu Red LED: threshold = +24 dBu adjustable includes peak-responding pulse stretch circuit for viewing fast transients |
AC Power Requirements
| Input Operating Voltage Range (VAC RMS) |
120 V setting: 105 V min, 140 V max 220 V setting : 200 V min, 285 V max |
| Frequency | 50-60 Hz |
| Power |
27 Watts Idle 27 Watts Typical Program 35 Watts Maximum |
| Fuses |
5x20 mm (2 required) 0.5 A 250 V Slo-Blo® Littelfuse® HXP218.500 or Equivalent |
Dimmensions
| Form Factor | 19" Rack Mount, 1 RU High |
| Depth behind front panel | 11.75" (298.5 mm) |
|
Overall depth including knobs and connectors without power cord |
12.625" (321 mm) |
| Width excluding 19" rack ears | 17.5" (445 mm) |
| Height excluding removable feet | 1.725" (43.8 mm) |
Weight
| PRE420 only | 8.05 lb. (3.65 kg) |
| PRE420 with power cord, extra fuses, and manual | 9 lb. (4.1 kg) |
| Shipping weight | 11 lb. (5 kg) |
