Greg Hanks Design BA-660 Tube Mic-Pre Limiter main image

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Greg Hanks Design BA-660 Tube Mic-Pre Limiter

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Page last updated Aug 11, 2025

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The BA-660 Tube Mic-Pre Limiter by Greg Hanks Design is a Vintage Pre-Amp , some said the cleanest preamps ever created.

Was Limited build by only 100 Units and in famous Studios used like by Eddie van Halen.

It emulates (analog) many of the classic compressors in one unit. Fairchild 660, Teletronix LA2A, Neve 2254, SSL Quad Buss compressor, and RCA BA6A.

Gain: Mic In >+87 db max. <-26 db min.

Line In: > +34 db max. < -26 db min.

• Input Impedance (20 Hz - 20 Khz) - Mic = 1k3 Ω , Line > 20K Ω , Insert Return > 100 K Ω , Side Chain Insert > 220KΩ

• Frequency Response - Mic In - 11 Hz - 28 Khz +0, -3 , Line In -6 Hz ->35 Khz+0/-1

•• S/N Ratio: > 120 db

•• Output Impedance: Line Out (20-20Khz) , 100 Ω balanced , 50 Ω unbalanced , Insert Send < 100 Ω

• Phantom Voltage nom. +48VDC , (Internally adjustable to +300 VDC @ 5 ma.)

• Attack Time - 200μs to 150 ms

• Release Time - 15 ms - 6 sec

• Ratio range: 1.2:1 - > 20:1

• Range of limiting: ≥ 18db

• Maximum Input Level: Mic In @ +14 > + 45 dbm , @ -15 > +25 dbm , Line In > +40 dbm

• Maximum output level: > +34 dbv into 600 Ω

• Harmonic Distortion: < .6% at all levels up to +34 dbm

• IM Distortion: < .1% at all levels up to +34 dbm

• Pin conventions: XLR connectors are wired as follows; Pin 1 = Shield , Pin 2 = Signal Plus + , Pin 3 = Signal Minus - , All 1/4" connections are TRS, and are wired as follows

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