The 660 Limiting Amplifier is based on an infamous English variable mu compressor. The circuit remains 100% the same.
SPEC SHEET:
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Attack time: 0.2ms to 0.8ms variable.
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Release Time: 0.3ms to 5s variable.
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Release Time: Up to 25s ("classical music" settings 5,6) for sustained high levels.
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Compression Ratio: 1:1 to 10:1 adjustable.
- Sidechain HPF: Off and 120hz
- Sidechain Linking: Yes, stereo only.
- 4 PCC189 and 2 PCC88 per channel.
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Elma Rotary Switching.
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Lundahl "SiFe" or "Amorphous Core" transformer.
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Noise Floor: Greater Than −102dB
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Freq Response (−1dB Points): 10Hz − 55kHz
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Freq response Flat: 15Hz − 50kHz
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THD:
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Input/Output Max. Operating Level: +4dBm.
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Warranty: 3 years.
Available are both standard Lundahl SiFe transformer or an "Amorphous Core" transformer. The amorphous core version adds a considerable cost to building. The easiest way to explain the difference between transformer is, the "SiFe" holds the cascode response a little more firm than the amorphous core and the amorphous core has a slightly lower THD and a less firm hold on the cascode response.
Download of audio sample is here. You can send me a sample and I can run through it through if needs be.
Each Unit is hand built here in Ireland. Delivery dates can vary from 1−6 months due to supply chain.
Pricing is for mono unit. Stereo matched sets are available.
Standard Version: €3,500 (ex vat)
Amorphous Core: €4,250 (ex vat)