From Chameleon Labs
When designing the 7721, Chameleon’s engineers started with a clean sheet of paper and deeply evaluated the details associated with developing a bus compressor for the modern studio. Basing detection and voltage control on a voltage control amplifier (VCA) topology and designing a circuit that provides low noise and transparency the team created an acoustic “glue" that is capable of consistently delivering punch and loudness to the signal.
The 7721 provides a classic set of adjustable settings as well as controls only available on esoteric compressors, including:
- Soft Knee / Hard Knee – Allows you to change between a softer arriving compression effect and a faster arriving, limiting type effect.
- Peak / RMS – This control allows you to choose between the Peak and RMS detection schemes that are quite different. Peak detection engages the compressor by monitoring peak or instantaneous voltage signals. RMS engages by looking at the average energy in the signal and comparing it to the threshold setting. Very different modes of operation that provide great solutions for specific problems.
- High Pass Filter – Allows you to filter out low frequencies and avoid pumping effects. This is particularly helpful when using the sidechain to more precisely control which frequencies are being compressed.
- Classic Controls – Threshold / Attack / Release / Ratio – Low ratios provide a nice starting place for master transparency, 4:1 provides more color and higher ratios for a tougher sound full of character. We like to use Attack and Release controls to respond to tempo and feel of a track.
- Blend – This control allows you to blend, or mix, the original uncompressed signal with the compressed signal providing another tool you can use to obtain your desired objective.
- VU Meter - Monitor Input, Outputs and Gain Reduction levels.
Compression:
Soft or Hard Knee compression type
Detection:
Peak or RMS
High Pass Filter:
60, 90, 130 or 200 Hz high pass filter applied to Side Chain detection signal
Threshold:
Applied between -15dB and +15dB
Attack:
Attack time in milli seconds - .1 / .3 / 1 / 3 / 10 / 30
Release:
Release time in seconds - .1 / .3 / .6 / 1.2 / 1.5
Ratio:
Compression ratio selection 1.5 / 2 / 4 / 8 / 10
Blend:
Full Dry equivalent to 0% compression, Full Wet equivalent to 100% compression
Output Gain:
-60dB to +20dB Output Level control
VU Meter controls (L&R):
In - Input / Out - Output / GR - Gain Reduction
Input Connectors
Input (Female XLR):
50 kΩ
Side Chain Input (Female XLR):
50 kΩ
Output (Male XLR):
200 Ω
Audio Specifications
Noise Specification:
<-100dBu Input Terminated with 600 Ω, compressor ON and Output Gain set to 0dB
Frequency Response:
20Hz - 20kHz +/- 0.25dB
Headroom:
> 20dB output level
Dynamic Range:
100 dB per AES17 Standard
Common Mode Rejection:
100Hz - 10kHz >90dB
Input and Output Impedance:
>10kΩ / <50 Ω
Indicators
Red Input Gain:
Input Overload
Red Output Gain:
Output Overload
Power Supply
100V - 240V (50/60Hz):
Switch mode power supply, fully shielded 3 amp peak output capability, quiescent consumption 0.5 Watts
1RU Steel enclosure
Free 3-Year Warranty
Sound Pure stands behind our products. Free three-year warranty on this item. Coverage exclusions live in Terms & Conditions, Section 27.
Level of support and expertise that simply isn't available at big-box megastores. Read the warranty →
Returns
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