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The DigiMAX LT is essential to the modern digital studio. Eight channels of pristine mic
preamplification, inserts on every channel, and an internal power supply set this unit apart
from anything on the market. Each channel features our award-winning, high performance,
dual servo microphone preamplifiers with 48V phantom power, and -20dB pad. Each channel
features a Neutrik?connector that accepts line level or microphone input. DigiMAX LT digital
synchronization is achieved by offering word clock in and out via BNC connectors. The sample
rate can be set on the front panel to 48K, 44.1K, and 32K providing compatibility across multiple
platforms.
The DigiMAX LT provides TRS inserts on every channel to allow external dynamics processors
or equalizers to be placed in the signal chain. The DigiMAX LT is the perfect partner for recording
systems such as DigiDesign 002?, MOTU828, MOTU 2408? as well as numerous digital mixers
and hard disk recorders.
Features
? ADAT? LightPipe Output
? Eight Dual Servo Mic Preamps and Line Inputs
? Eight TRS Insert Points
? Linear Internal Power Supply
? 48V Phantom Power on Each Channel
? -20dB Pad on Each Channel
? Adjustable Sample Rates
? BNC I/O for Sync
Technical Specifications
Number of Channels Eight
Input
Input Impedance, XLR Input 1.3k Ohms
Input Impedance, Line Level Input 10k Ohms
Connectors Neutrik? Combo
Panel Controls
Gain 0dB to +40dB
Pad -20 dB
Phantom Power +48 V
Meters
Signal Present LED -20dBu
Clip LED +22dBu
Output
ADAT? LightPipe Digital Optical 24-bit
Insert (TRS)
Send (Unbalanced) 51 Ohms
Return (Unbalanced) 10k Ohms
Digital
Sampling Rates 32kHz, 44.1kHz, 48kHz
Performance
Headroom +22dB
Frequency Response 20Hz-50kHz
THD + Noise (Unweighted) 98dB
Analog Dynamic Range >120dB
Power Supply Rejection >98dB
Amplifier Type Dual Servo
Power Supply
Type Linear, Internal Input: 100/120/220/240V AC (Factory Configured)
Power 80 Watts
Physical
Size 1U Rack
Dimensions 19" x 1.75" x 9“
Weight 10 lbs./ 4.5 kg.
Chassis Steel
Panel Aluminum
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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 PRE-73 Mk2 is the first one-channel low-cost preamp on the market that is using a fully discrete signal path with three separate transformers for the balanced mic input, the line input and the output.
The circuit is very similar to the classical preamp section of the Neve 1073 pre/eq module with a corresponding sound character that is warm, punchy, sweet and musical.
This classical sound has 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 PRE-73 Mk2 has a maximum gain of 80 dB on the mic input and the gain range on the Line input is -20 to + 10 dB. There is also a high-impedance instrument input.
The PRE-73 Mk2 is perfect for almost any signal source, no matter if it's a microphone with a high or low sensitivity (like a passive ribbon mic), a syntheziser or sound module or an electric guitar or bass.
The input impedance of the microphone input can be switched between 300 and 1200 ohms, which makes it possible to affect the tone of most microphones. There is also phase switch and an simple 4-step LED signal level meter.
The output level control makes it possible to make fine gain adjustments and also to overload the main gain stage for more character and then lower the signal to a suitable level before the output stage.
The Mk2 update consists of:
- An unbalanced insert jack (nominal level about 18 dBu) added on the back panel for inserting units like the coming GAP EQ-73, a three band eq.
- LED meter levels adjusted.
- 600 Ohm termination resistor and jumper added to power supply board (accessible from the inside of the unit).
- Revised Gain switch, turning the know clockwise now increase the gain.
- Reduced noise at high gains by a change to the power supply grounding scheme. | ISA OneClassic Single-channel Microphone Pre-amplifier with Independent D.I.
Key Features
ISA Series Transformer-based Pre-amplifier
Encased in a rugged and portable chassis, ISA One offers the classic Focusrite microphone pre-amplifier at its lowest cost to date.
Flexible Independent D.I. Channel
ISA One is ideal for both engineers and demanding performers alike, featuring independent gain control, an output for routing to an amp, an independent XLR output on the rear and routing to the optional ADC.
Switchable Impedance
Choose one of four carefully selected input impedances, including the original ISA 110 setting, to suit any microphone.
Optional Stereo 192kHz ADC
This optional card embodies cutting-edge conversion technology, incorporating Focusrite analogue circuitry to deliver the best A-D performance in its class (Dynamic range of 119dB).
Rugged Custom Flight Case
Built to protect your ISA One from the rigors of the road. Rugged plywood construction with a solid polypropylene exterior and reinforced corners.
Headphone Output with Volume Control
ISA One can feed either a sum of the two inputs to the headphones output, or an external stereo cue mix (such as a stereo mix feed from an interface) via two TRS Jack inputs on the rear of the unit.
Dedicated Insert Point
Allows you to place extra processing between the pre-amplifi er or D.I. and the optional converter, such as an EQ or compressor.
Specifications
Analogue Channel Inputs
- XLR Mic input
- One XLR and one TRS line input
- XLR Instrument input TRS Jack
- External ADC input TRS Jack
- TRS jack return
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Analogue Channel Outputs
- TRS jack send
- XLR balanced line output
- XLR DI output
- TS jack DI through
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Analogue Channel Additional I/O
- TRS Jack cue mix left input
- TRS Jack cue mix right input
- 1/4” TRS Jack headphones output
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Mic Input Response
| Gain range |
0dB to 60dB in 10dB steps + 20 dB of variable gain |
| Input Impedance |
Switched Impedance setting Equivalent Input Impedance at 1kHz |
Low = 600 Ohms
ISA110 = 1400 Ohms
Med = 2400 Ohms
High = 6800 Ohms |
| EIN (Equivalent Input Noise) |
-126dB measured at 60dB of gain with 150 Ohm terminating impedance and 22Hz/22kHz band-pass filter |
| Noise |
Noise at output with unity gain (0 dB) and 22 Hz-22 kHz band pass filter |
-97 dBu |
| Signal-to-Noise Ratio |
106 dB relative to max headroom (9dBu) |
| Total Harmonic Distortion + Noise |
Measured at medium gain (30dB) with a 1kHz -20dBu input signal and with a 22Hz/22kHz band-pass filter |
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| Frequency Response |
At minimum gain (0 dB) |
-0.5dB down at 10Hz and -3dB down at 125kHz |
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At maximum gain (60dB) |
-3dB down at 16Hz and -3dB down 118kHz |
| CMRR (Common Mode Rejection Ratio) |
98dB (Channel 1, 1kHz, maximum gain with +24 dBu input) |
| Crosstalk Channel to Channel |
With 10dB@1kHz input to chA, chB output =104dBrA. With 10dB@10kHz input to chA, chB output = 84dBrA |
Line Input Response
| Gain range |
-20dB to +10dB in 10dB steps + 20 dB of variable gain |
| 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 |
-96 dBu |
| Signal-to-Noise Ratio |
Measured with a 22 Hz-22 kHz band pass filter |
120 dB relative to max headroom (24 dBu)
118dB relative to 0dBFS (+22dBu) |
| Total Harmonic Distortion + Noise |
Measured with a 0 dBu input signal, and a 22 Hz-22 kHz band pass filter |
0.0001% |
| Frequency Response |
At unity gain (0 dB) |
-0.3dB down at 10Hz and -3dB down at 200kHz |
Instrument Input Response
| Gain range |
10dB to 40dB continuously variable |
| Input Impedance |
High = greater than 1M
Low =greater than 300k |
| Noise |
Measured with 22 Hz-22 kHz band pass filter |
Minimum gain (+10 dB): -92 dBu
Maximum gain (+40dB): -62dBu |
| THD |
At minimum gain (+10) |
| Frequency Response |
At minimum gain (+10 dB) |
-10dB input: 10Hz-100kHz +/- 0.6dB |
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At maximum gain (+40 dB) |
-40dB input: -2.5dB down at 10Hz and 0dB at 100kHz |
Meters
| Moving Coil (MC) Meter |
factory calibrated to 0VU = +4dBu with 1kHz sinewave. With the VU Cal button pressed the meter can be adjusted on the rear panel to allow 0VU to equal +10dBu to +26dBu with the centre detent being equal to +22dBu. |
| Peak LED Meters |
Calibrated in the detent position for 0dBFS = +22dBu, calibration is adjustable on the rear panel to allow 0dBFS to equal +10dBu to +26dBu |
| Routing for MC and Peak1 meter is after the HPF, pre insert send or switched post insert return. Peak2 is always pre ADC channel 2, which can be fed by external input or Instrument input. |
| LED Levels |
As follows, when peak calibration is set to center detent on the rear panel. (This is when using the internal ADC). |
0 = +22dBu
-2 = +20dBu
-6 = +16dBu
-12 = +10dBu
-18 = +4dBu
-42 = -20dBu |
| Frequency Response |
At minimum gain (+10 dB) |
-10dB input: 10Hz-100kHz +/- 0.6dB |
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At maximum gain (+40 dB) |
-40dB input: -2.5dB down at 10Hz and 0dB at 100kHz |
High-Pass Filter
| Roll-Off |
18 dB per octave (3 pole filter) |
| Frequency |
Fixed 75Hz measured at the 3dB down point |
Weight and Dimensions
| W x D x H |
220mm (W) x 104mm (H) x 254 - 290mm (D - top to bottom) |
8.66" (W) x 4.1" (H) x 10" - 11.4" (D - top to bottom) |
| Weight |
3.9 kg |
8.6 lbs |
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Features
Superlative sound
Studio quality mic preamp
Total control - Input Gain, EQ contour, Output Gain,
Overload indicator
Multiple output connectors
XLR/jack combo input
Switchable 48 V DC Phantom Power for condenser Mics
Compact, computer friendly package
Needs no external power supply
ARX is proud to introduce the e-pre - the ultimate microphone pre-amp for
hard disk recording, designed by audio professionals, not computer engineers.
The all-new e-pre is so much a part of your system that it fits right into a spare
5?" slot in your computer case! It's the perfect tool for all your day-to-day
recording requirements. No equipment racks to plug in, no masses of cabling to
connect - the e-pre is ready and waiting when you need it.
The e-pre is a studio quality microphone pre-amp using the same internal components
as high end mixing consoles, built into a compact, computer friendly package.
It has controls for:
Input Gain - fully variable from 10dB through to 60dB to suit all types of microphones,
plus switchable 48 V Phantom Power to enable condenser microphones to deliver
their best.
A Contour control for EQ sweetening, providing fast, easy access to a whole range
of useful EQ curves
Output level control - fully variable to match the e-pre's output to the input of the sound
card. From -10dB consumer cards through to +4dB for professional sound cards, the
e-pre can handle it.
Multiple output connectors match up with any kind of sound card, including mini jacks,
standard jack, RCA (phono) plugs, and even a connector to link to the internal CD ROM
audio input of your sound card (if fitted).
We've even fitted a 12 VDC input connector on the rear to enable the e-pre to run from an
external power supply if required (eg for use with notebook computers or stand-alone use).
Any way you look at it, the e-pre by ARX is the total professional microphone pre-amp for
all your hard disk recording needs
e-pre Benefits
Professional Balanced XLR mic input
True 48v phantom power
Runs into the Line input of ANY sound card - uses the card you've already paid for
High headroom = clean recordings
Smart EQ
Compatible with non-computer audio equipment
Professional performance and specs in a user friendly package
T E C H N I C A L S P E C I F I C A T I O N S
Input Impedance
Mic 2 K Ohms Balanced; XLR type Pin 1 Audio Ground, Pin 2 +, Pin 3-
Line 25 K Ohms Balanced, ?" TRS jack Tip +, Ring , Sleeve Audio Ground
Phantom Power Voltage Switchable +48 V DC on XLR Pins 2 and 3
Max Input Level Mic +15 dB, Line +20 dB
Input Gain 10 dB Minimum, variable to 60 dB Maximum
Output Level -10 dB variable through 0 dB to +4 dB
Overload Indicator Measured at all Gain points throughout the circuitry
Output Noise -90 dB Unweighted, -97 dB 'A' weighted
(Measured with Gain nominal 20 dB, Output level -10 dB)
Frequency Response 20 - 20 KHz ± 0.25 dB
Distortion
100 Hz 0.0085%
1 KHz 0.008%
10 KHz 0.0083%
(Measured with Mic Gain 20 dB, Output 0 dB)
Power Requirements 12 V DC from either computer supply or external supply
(external power supply not included in e-pre package)
Size 148mmW x 42mmH x 150mm D (5?“W x 1?H x 6“D)
Weight Under 1 Kilo (2.2 lbs)
| Highly versatile and portable, Sound Devices' MM-1 is a single-channel, portable microphone preamplifier with a powerful headphone monitoring function. Proven in mission-critical applications, the high-performance microphone preamplifier uses a transformer-balanced input and output with a bipolar ±15 volt power supply to produce low-noise, low-distortion gain at all switch positions. It features an "unclippable" dual-stage limiter and two-position high-pass filter. Flexible microphone powering provides phantom power at 48 volts or 12 volts and 12-volt T-power. It is powered from two-AA batteries or external 5-18 VDC.
The MM-1 is at home in high-definition television production, corporate/industrial environments, radio/television announce booths, and music production. Its headphone monitor is an advantage in applications where communications channels or mix-minus feeds need to be monitored in headphones. The user can monitor both microphone audio and external audio sources in headphones with level control.
The MM-1 is designed to be durable. Its aluminum chassis, oversized end panels, machined knobs, and panel mounted connectors assure reliable mechanical operation.
- Maximum of 66 dB of gain, in eleven discrete steps
- Dynamic range exceeding 120 dB
- 10 Hz to 50 kHz audio bandwidth
- High immunity to RF interference
- High current line output driver
- Transformer-balanced input and output
- Extended range peak limiter via dual opto-isolators makes preamplifier virtually "unclippable“
- Selectable 48-volt / 12-volt phantom power or 12-volt "T" power
- High-pass filter @ 80 or 160 Hz, 6 dB per octave
- Headphone monitoring of microphone audio, monitor audio, or a mix of both
- Monitor input accepts mono, balanced or unbalanced line-level inputs on 1/4-inch tip-ring-sleeve connector
- Separate level control of Monitor gain and overall headphone gain
- Split ear function via DIP switches
- Internal battery power (two-AA)
- Excellent battery life with alkaline and NiMH rechargeable batteries
- External 5-17 VDC powering (plug included)
- High-strength aluminum chassis with durable belt clip
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