پیژندنه
The Focusrite ISA 428 MK2 is a high-quality 4-channel microphone preamplifier designed for professional audio recording environments. It features Focusrite's renowned transformer-based preamps, offering exceptional sonic clarity and versatility. This manual provides essential information for the setup, operation, maintenance, and troubleshooting of your ISA 428 MK2.
Figure 1: Front panel of the ISA 428 MK2, showing four input channels with controls and metering.
چمتو کول
Proper setup ensures optimal performance and longevity of your ISA 428 MK2. Follow these steps for initial installation:
- بسته بندي کول: Carefully remove the ISA 428 MK2 from its packaging. Retain all packaging materials for future transport or storage.
- د ریک نصبول: The ISA 428 MK2 is designed for standard 19-inch rack mounting. Secure the unit using appropriate rack screws. Ensure adequate ventilation around the unit.
- د بریښنا پیوستون: Connect the supplied power cord to the IEC inlet on the rear panel of the unit and then to a grounded AC power outlet. The unit operates on Corded Electric power.
- آډیو پیوستون:
- د مایکروفون داخلونه: Connect microphones to the XLR inputs on the rear panel.
- Line/Instrument Inputs: Use the 1/4" jack inputs for line-level signals or direct instrument connections.
- پایلې: Connect the XLR outputs to your audio interface, mixer, or recording device.
- ټکي داخل کړئ: Utilize the dedicated insert points for integrating external signal processors like compressors or EQs.
Figure 2: Rear panel of the ISA 428 MK2, illustrating the various audio input and output connections.
عملیاتي لارښوونې
The ISA 428 MK2 offers precise control over your audio signals. Familiarize yourself with the following operational aspects:
کنټرول ترلاسه کړئ
Each channel features a versatile gain range from 0dB to +60dB, with an additional 20dB variable trim. Adjust the gain knob to achieve optimal signal levels without clipping. Monitor the input level meters to prevent overload.
د مخنیوی کنټرول
The ISA 428 MK2 allows you to tailor the preamp to your microphone with selectable impedance options: 600, 1400, 2400, and 6800 Ohms. Experiment with different impedance settings to find the optimal match for your microphone, which can significantly affect its tonal character and performance.
فینټم پاور (48V)
Engage the 48V phantom power switch for condenser microphones that require external power. Ensure the microphone is connected before activating phantom power to prevent damage.
د بریښنا لیږدونکی
Each channel includes a high-pass filter to remove unwanted low-frequency rumble or noise. Activate this filter when recording sources prone to such issues, like vocals or acoustic instruments in a live room.
ميټرنگ
The front panel features clear LED metering for each channel, allowing you to visually monitor input and output levels and prevent digital clipping.
شکل ۳: زاویه لرونکی view of the ISA 428 MK2, providing a clearer perspective of the front panel controls and indicators.
ساتنه
To ensure the longevity and optimal performance of your ISA 428 MK2, follow these maintenance guidelines:
- پاکول: Use a soft, dry cloth to clean the exterior of the unit. Avoid abrasive cleaners or solvents, which can damage the finish.
- وینټیلیشن: Ensure that the ventilation slots are clear of dust and obstructions to prevent overheating.
- ذخیره کول: کله چې د اوږدې مودې لپاره نه کارول کیږي، نو دا وسیله په یخ او وچ ځای کې وساتئ، په غوره توګه په اصلي بسته بندۍ یا محافظتي پوښ کې.
- بندول: تل د یونټ بریښنا بنده کړئ او د پاکولو یا هر ډول ساتنې ترسره کولو دمخه یې له مین څخه جلا کړئ.
د ستونزو حل کول
If you encounter issues with your ISA 428 MK2, refer to the following common troubleshooting steps:
| ستونزه | احتمالي لامل | د حل لاره |
|---|---|---|
| هیڅ ځواک نشته | د برېښنا کیبل پرې شوی؛ د برېښنا ساکټ خراب شوی؛ د واحد فیوز چاودېدلی دی. | Check power cable connection; Try a different outlet; Consult a qualified technician for fuse replacement. |
| هیڅ غږیز محصول نشته | Incorrect cabling; Gain set too low; Phantom power not engaged for condenser mics; Output device issues. | Verify all audio cables are correctly connected; Increase gain; Activate 48V phantom power if needed; Check your audio interface/mixer settings. |
| خراب شوی غږ | Input signal too hot (clipping); Faulty cable; Microphone impedance mismatch. | Reduce input gain; Try a different cable; Adjust impedance setting on the ISA 428 MK2. |
| غږ او شور | Ground loop; Faulty cable; External interference. | Ensure all equipment is properly grounded; Try different cables; Isolate the unit from other electronic devices. |
If the problem persists after attempting these solutions, please contact Focusrite customer support.
مشخصات
Detailed technical specifications for the Focusrite ISA 428 MK2:
- ماډل: 428MKII
- چینلونه: 4 مایکروفون پریamps
- د لاسته راوړلو سلسله: 0dB to +60dB (Mic), +20dB variable trim
- د ننوتلو خنډ: Selectable (600, 1400, 2400, 6800 Ohms)
- ارتباط: XLR Mic Inputs, 1/4" Line/Instrument Inputs, XLR Outputs, Insert Points
- THD+N: As low as 0.0009%
- ابعاد (محصول): 25 x 17.4 x 8.9 انچه
- وزن (توکي): ۲.۴۵ پونډه
- د بریښنا سرچینه: د بریښنا تار شوی
- پورته کول: 19" Rack-mountable
د تضمین معلومات
The Focusrite ISA 428 MK2 comes with a 2-year Focusrite warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. For full terms and conditions, refer to the official Focusrite website or contact their support.
ملاتړ او اړیکه
For further assistance, technical support, or to register your product, please visit the official Focusrite webسایټ:
You can also find additional resources, FAQs, and driver downloads on their support pages.
