1968 MkII - Audio Compressor DRAWMER - Free user manual and instructions
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| Product Type | Dual-Channel Vacuum Tube Compressor/Limiter |
| Brand | Drawmer |
| Model | 1968 MkII |
| Form Factor | 19-inch rackmount, 1U |
| Dimensions (W x H x D) | 483 mm x 44 mm x 200 mm |
| Weight | Approximately 5 kg |
| Power Supply | 100-240 V AC, 50/60 Hz, internal |
| Power Consumption | 30 W |
| Inputs | 2 x XLR/TRS combo, balanced |
| Outputs | 2 x XLR, balanced; 2 x TRS, unbalanced |
| Controls | Threshold, Ratio, Attack, Release, Gain Make-Up, Bypass per channel; Link, Output Meter |
| Tube Complement | 2 x 12AX7 / ECC83 per channel |
| Frequency Response | 20 Hz – 20 kHz, ±0.5 dB |
| Noise Floor | < -85 dBu (unweighted) |
| Maximum Input Level | +21 dBu |
| Maximum Output Level | +21 dBu into 600 ohms |
| Features | Variable knee compression, side-chain access, stereo linking, output metering |
| Maintenance | Clean exterior with a soft, dry cloth; avoid solvents. Ensure adequate ventilation. |
| Safety | Use only with grounded AC outlets. Do not expose to moisture. Refer servicing to qualified personnel. |
| Spare Parts & Repairability | Contact Drawmer authorized service centers. Tubes are user-replaceable; other components require professional service. |
| General Information | Professional audio compressor for studio and live use. Designed in the UK. |
Frequently Asked Questions - 1968 MkII DRAWMER
How do I connect the 1968 MkII to my audio interface?
Use balanced XLR or TRS cables from your interface outputs to the 1968 MkII inputs. Connect the 1968 MkII outputs back to your interface line inputs. Ensure levels are set appropriately to avoid clipping.
What is the recommended tube replacement?
The 1968 MkII uses 12AX7/ECC83 tubes. Replace with matched pairs from reputable brands like JJ Electronics, Electro-Harmonix, or Sovtek. Always power off and unplug before replacing tubes.
How do I achieve gentle compression?
Set a low ratio (2:1 or 3:1), a moderate threshold such that gain reduction is 3-6 dB, and use slower attack and release times (e.g., 10 ms attack, 100 ms release). Adjust make-up gain to compensate.
What does the 'Link' switch do?
The Link switch couples the side-chains of both channels for stereo operation. When engaged, the left channel controls both channels’ compression, ensuring a unified stereo image.
Why is there no output sound?
Check that the unit is powered (LED on). Verify all cables are securely connected. Ensure the Bypass switch is not engaged (bypass removes compression but should pass signal). If still no sound, test with a known-good source and cable.
Can I use the 1968 MkII on a mix bus?
Yes, the 1968 MkII is excellent for mix bus compression. Use the Link function for stereo, set a low ratio (2:1), slow attack (10-30 ms), and auto-release or medium release for glue. Start with 2-4 dB of gain reduction.
How do I reduce noise from the unit?
Ensure proper grounding: use a dedicated, grounded outlet. Keep audio cables away from power cables. If noise persists, try replacing tubes (microphonic tubes cause noise). Also, check that input levels are not too low (increase make-up gain).
What is the side-chain insert for?
The side-chain insert allows external processing of the side-chain signal. You can insert an equalizer to create de-essing or frequency-dependent compression. Connect the output of your external processor to the side-chain return.
How do I calibrate the output meter?
The output meter is calibrated at the factory. It displays output level relative to +4 dBu = 0 VU. If recalibration is needed, refer to a qualified technician. Do not adjust internal trimmers without proper equipment.
Is the 1968 MkII suitable for tracking vocals?
Absolutely. Its tube stage adds warmth and character. Use a medium attack (5-10 ms), fast release (50 ms), ratio around 4:1, and threshold to catch peaks. Adjust make-up gain for consistent level.
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USER MANUAL 1968 MkII DRAWMER
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Product information
Brand : DRAWMER
Model : 1968 MkII
Category : Audio Compressor