905 - Uncategorized DBX - Free user manual and instructions
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| Product Type | Audio Signal Processor (Compressor/Limiter) |
| Rack Size | 1U (Standard 19-inch rackmount) |
| Dimensions | 19 x 1.75 x 8 inches (483 x 44 x 203 mm) |
| Weight | 5.5 lbs (2.5 kg) |
| Power Supply | AC 100-240V, 50/60 Hz, 15W |
| Main Functions | Compression, Limiting, Threshold, Ratio, Attack, Release, Makeup Gain |
| Input/Output Connectors | XLR and 1/4-inch TRS balanced/unbalanced |
| Frequency Response | 20 Hz - 20 kHz, ±0.5 dB |
| Dynamic Range | > 110 dB |
| Total Harmonic Distortion | < 0.01% (at 1 kHz) |
| Noise Floor | < -90 dBu (unweighted) |
| Controls | Threshold, Ratio, Attack, Release, Gain, Bypass switch, Power switch |
| Indicators | LEDs for Gain Reduction, Signal Present, Power |
| Construction Material | Steel chassis with aluminum front panel |
| Operating Temperature | 32°F to 104°F (0°C to 40°C) |
| Cooling | Passive (fanless design) |
| Maintenance | Wipe with dry cloth; do not use solvents. Keep vents clear. |
| Safety Precautions | Do not expose to moisture or extreme temperatures. Use grounded outlet. |
| Spare Parts & Repairability | Contact authorized DBX service center for repairs. No user-serviceable parts inside. |
| Included Accessories | Power cord, user manual, rack ears with screws |
Frequently Asked Questions - 905 DBX
How do I connect the DBX 905 to my mixer?
Use balanced XLR or 1/4-inch TRS cables from your mixer's insert send or line output to the 905's input jack. Connect the output to your mixer's return or next device.
What is the correct power-up sequence?
Ensure all volume levels are turned down. Connect the power cord, then switch on the 905. Finally, turn on your amplifier or powered speakers to avoid loud pops.
How do I set the threshold for gentle compression?
Start with the threshold fully clockwise (highest). Slowly turn it counterclockwise until you see 2-3 dB of gain reduction on the meter when the source signal is at its loudest.
What attack and release times should I use for vocals?
For vocals, set attack to around 10-30 ms and release to 100-300 ms. Adjust based on the desired naturalness; faster attack catches peaks but may sound clamped.
Can I use the DBX 905 on a stereo bus?
Yes, use two units in stereo pair mode if available, or connect one unit to both channels via a Y-cable (not recommended for critical stereo imaging). The 905 is mono, so for stereo you need two units.
Why is there no gain reduction happening?
Possible causes: the bypass switch is engaged, the threshold is set too high (not active), or the input signal is too low. Check signal presence LED and adjust threshold lower.
How do I clean the DBX 905?
Turn off and unplug the unit. Use a soft, dry cloth to wipe the front panel and chassis. Do not use any liquid cleaners or solvents.
What is the difference between compression and limiting on this device?
Compression uses ratios up to 10:1 for controlling dynamic range. Limiting uses ratios of 20:1 or higher (often labeled 'limit') to prevent signals from exceeding a set level. The 905 can be used for both by selecting the appropriate ratio.
Can I mount the 905 in a rack without cooling issues?
Yes, the 905 is fanless and designed for rack mounting. Ensure adequate ventilation around the unit and do not block the top/bottom vents.
Where can I find the user manual for the DBX 905?
The user manual is included in the box and also available for download on the DBX official website under the Support section. It contains detailed setup and application guides.
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USER MANUAL 905 DBX
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Product information
Brand : DBX
Model : 905
Category : Uncategorized