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User Manual for Aphex Model 124B 2-Channel Audio Level Interface Click to enlarge the picture
Contents of the user manual for the Aphex Model 124B 2-Channel Audio Level
- Product category: Level Matching Transformers Aphex
- Brand: Aphex
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Aphex Level Matching Transformers
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User manual for the Aphex Model 124B 2-Channel Audio Level contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Aphex product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Aphex user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Aphex product will considerably shorten its lifespan!
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Product description The Model 124B 2-Channel Audio Level Interface from Aphex is designed to allow you to connect two channels of consumer-level, -10dBv gear to a professional-level, +4 or +8 dBm system. It provides a 2-way buffer so both systems connected can operate unaffected by the other. In addition, the 124B can also function as a line driver and a signal splitter. - Input
- Servo-balancing means that high common mode voltages, such as induced hum from a nearby AC line, are compensated for, preserving headroom. The input impedance of 100 K Ω allows bridging over a 600 Ω balanced or unbalanced line with negligible loading effects. Front panel switchable 600 Ω load allows for input line termination when required
- Outputs
- Servo-balancing allows the outputs to be used balanced or unbalanced (single-ended) at any time by simply grounding either unused pin. The servo compensates for the voltage loss on one side so there is no 6 dB loss of level. The outputs are also protected against short-circuits, so nothing is damaged if the wrong pins are grounded. A front panel indicator will flash red when the balanced output level is 5 dB below clipping
- Applications
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- Two-Way Interface Amplifier: for connecting any unbalanced device such as a cassette deck, equalizer, CD player or DAT deck to the IHF inputs and outputs. The balanced inputs and outputs go to a studio console, patchbay or other line level equipment. The different gains and impedances are matched for optimal performance
- Line Driver: The servo-balanced input and output stages of the 124 can be used as a line driver for long lines. The output stage provides a short-circuit proof, low impedance source that will be relatively unaffected by the impedance of the cable. Gain may even be taken to boost signal level. In this application, either the unbalanced IHF or balanced high-level inputs may be used. For the latter, the IHF inputs and outputs are simply jumpered
- Signal Splitter: The 124 may be used to provide two balanced outputs from a single unbalanced mono signal. A "Y" connector is used to split the incoming signal to each of the IHF unbalanced inputs
UPC: 693714012416 In the Box Aphex Model 124B 2-Channel Audio Level Interface Limited 2-Year Warranty Table of Contents
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Technical parametersAphex 124B Specs | | | Bandwidth | 5 Hz to 100 kHz (0, -0.5dB) | | Dynamic Range | 99 dB | | THD | 0.005 | | Channel Isolation | > 70 dB | | CMRR | > 45 dB (typical) | | | | Connectors | IHF:2x RCA
Balanced: 2x XLR 3-pin female | | Input Impedance | IHF: 18 kΩ
Balanced: 100 kΩ with front panel 600 Ω termination switch | | Input Level | IHF: -10 dBV; peak 15 dBV (ref. 1 V)
Balanced: +4 dBm (+8 dBm via internal jumpers); peak +30 dBm | | | | Connectors | IHF: 2x RCA
Balanced: 2x XLR 3-pin male | | Output Impedance | IHF: 150 Ω
Balanced: 65 Ω | | Output Level | IHF: -10 dBV, peak +18 dBV (ref. 1 V)
Balanced: +4 dBm front panel adjustable ± 6 dB, peak +25 dBm | | | | Power Requirements | 100, 120, 220, OR 240 VAC, 50-60 Hz | | Dimensions (H x W x D) | 1.75 x 8.25 x 7.25" (44.5 x 209.5 x 184.2 mm) | | Weight | 3.5 lb (1.6 kg) | | | | Package Weight | 4.7 lb | | Box Dimensions (LxWxH) | 12.1 x 9.0 x 4.3" |
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