The Neve studio limiter/compressor type 2254 has been designed to meet the varied needs of sound recording studios for a flexible and comprehensive instrument for the control of program dynamic range.

Specifications:

Input: 10KΩ bridged earth-free
Output: Source impedance 80Ω, balanced and earth-free
Maximum output: 26dBm into 600Ω
Gain: 0dB (preset)
Noise: -75dBm in the band 20Hz to 20kHz for the linear and Limit modes rising in the compression mode with an increase in 'MAKE UP GAIN' to a maximum of -60dBm at 6:1 ratio
Frequency Response: Flat, ±1dB, from 20Hz to 20kHz

Distortion:
Typical results measured at 8dB out and with 800ms recovery time are: residual,
-Linear mode: 0.05%.
-Compression mode, 6:1 ratio: 0.2%
-Limiting mode @20dB input: -0.4%

Limiter:
Ratio: greater than 100:1
Level: 8dBm within 0.5dB on preset, adjustable from 4dBm to 12dBm in steps of 0.5dBm
Attack Time: 5ms
Recovery Time: 100ms, 200ms, 800ms and 'Auto' (50ms/5 sec).

Compressor:
Ratio: 1.5:1, 2:1, 3:1, 4:1 and 6:1.
Threshold: 0dBm, within 0.5dB on preset, adjustable from-20dBm, to 10dBm in 2dB steps.
Attack time: 5ms
Recovery time: 400ms, 800ms, 1500ms and 'Auto'.
Gain: 0dB below compression threshold, adjustable 'Gain make up' available from 0dB to 20dB

Meter:
switched to indicated either gain control up to 16dB or signal level from -12dB to 12dB. Action approximates that of a P.P.M