263A - Uncategorized DBX - Free user manual and instructions
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| Product Type | Audio Signal Compressor/Limiter |
| Brand | DBX |
| Model | 263A |
| Dimensions (H x W x D) | 1.75 x 19 x 8 inches (4.4 x 48.3 x 20.3 cm) |
| Weight | 3.5 lb (1.6 kg) |
| Power Supply | 120V AC, 60 Hz, 10W |
| Compression Type | True RMS detection with AutoDynamic Attack/Release |
| Input/Output Connectors | XLR and 1/4 inch TRS balanced/unbalanced |
| Controls | Threshold, Ratio, Attack, Release, Output Gain, Bypass |
| Metering | Analog VU meter with gain reduction indication |
| Sidechain | External sidechain insert (1/4 inch TRS) |
| Frequency Response | 20 Hz - 20 kHz ±0.5 dB |
| Dynamic Range | >110 dB |
| THD + Noise | <0.1% at 1 kHz |
| Main Functions | Compression, limiting, bypass, key input, hardwire bypass relay |
| Cleaning | Wipe with a dry, lint-free cloth. Do not use liquid cleaners. |
| Safety Warnings | Do not expose to rain or moisture. Risk of electric shock. No user-serviceable parts inside. |
| Spare Parts Availability | Contact DBX authorized service centers for replacement parts. |
| Warranty | Limited warranty, details in user manual. |
Frequently Asked Questions - 263A DBX
How do I connect the DBX 263A compressor to my mixer?
Use balanced XLR or 1/4 inch TRS cables. Connect the output of your mixer's insert send to the compressor's input, then the compressor's output to the mixer's insert return. Alternatively, use in-line between the mixer output and amplifier.
What is the purpose of the threshold control?
The threshold sets the level at which compression begins. Signals above this level are reduced in gain. Lower thresholds apply more compression to the signal.
How do I set the attack time on the 263A?
The attack time determines how quickly the compressor responds to signals exceeding the threshold. For percussive instruments, use a faster attack (1-5 ms) for transparent compression, while slower attacks (10-100 ms) allow initial transients through.
What does the ratio control do?
The ratio determines the amount of gain reduction applied to signals above the threshold. For example, a 4:1 ratio means for every 4 dB of input above the threshold, the output increases by only 1 dB. Higher ratios provide more limiting.
How do I use the sidechain feature?
Plug an external signal (e.g., kick drum trigger) into the sidechain input using a 1/4 inch TRS cable. This signal controls the compressor's gain reduction, allowing creative effects like ducking. Ensure the key filter is set appropriately.
Why is the bypass switch used?
The bypass switch removes the compressor from the signal path for A/B comparison. When engaged, the relay connects input directly to output, preserving signal integrity. Use to verify the effect of compression.
Can I use the DBX 263A in a stereo pair?
Yes, two units can be linked for stereo operation using a stereo link cable (not included). This ensures matched gain reduction across both channels. Refer to the manual for proper connection.
What maintenance does the 263A require?
Regularly dust the exterior with a dry cloth. Check cables and connectors for wear. No internal calibration is needed. If issues arise, contact a qualified technician. Do not open the chassis to avoid shock.
Why is the output level lower than the input?
This is normal due to gain reduction. Use the output gain control to make up for the lost level. Adjust while monitoring to achieve unity gain when bypassed versus engaged.
How do I reset the compressor to factory settings?
Turn off the unit, press and hold the bypass switch while powering on. Release when all LEDs flash. This restores default threshold, ratio, attack, and release settings. Check manual for exact procedure.
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USER MANUAL 263A DBX
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Product information
Brand : DBX
Model : 263A
Category : Uncategorized