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The Heritage Audio HA-609A unlocks the musical creativity that you have to offer! The Heritage Audio HA-609A DUAL MONO STEREO COMPRESSOR/LIMITER is a professional diode bridge-based dynamics processor in a convenient 2RU format. It features Carnhill/St Ives transformer balanced inputs and outputs, and the outputs are driven by means of ´73 type Class A amplifiers. It also features St. Ives inter stage transformers to isolate the diode bridges in a fully floating configuration. Therefore, there is a total of no less than 6 Carnhill/St Ives transformers per unit, 3 per channel, tone for days.
Unlike vintage diode bridge designs, the HA-609A has dual attack times both in the compressor and limiter sections and expanded threshold and limit level ranges that easily accommodate the hotter modern input signals. Gone is the classic problem of the unit always compressing even at the highest limit level and compression threshold that used to drive crazy to the mixing and mastering engineers.
Finally, the all discrete class A construction departs from other vintage and current diode bridge units, (which still rely on class A/B amps), and reacts so much better to compression, in a much more musical way.
Maximum Output Level: Over +26.5 dBu into 600 ohms.
Self-Noise: Less than -75dBu 20Hz-20Khz. -80dBu A-weighted.
THD+N (50Hz- 20Khz): not engaged, less than 0.07% at +20dBu.
Frequency Response, COMPRESS and LIMIT OUT, +- 0.5dB: 15Hz- 30Khz.
Input Impedance: 10Kohms, transformer balanced and floating.
Output Impedance: Less than 75 ohms, transformer balanced and floating, Class A driven.
Compressor Characteristics: Threshold from –20 to +20 dBu on a 41-step precision potentiometer. Ratio selectable on a rotary switch, 1.5:1, 2:1, 3:1, 4:1, 6:1. Release selectable on a rotary switch, 100, 400, 800, 1500 mS, A1 and A2 auto release times. A1 corresponds to 50mS on peaks and around 500mS on sustained program. A2 to 50mS on peaks and 1.5 seconds on sustained program.
Limiter Characteristics: Limit level selectable from 0 to +20 dBu on a 41-step precision potentiometer. Release selectable on a rotary switch, 50, 100, 200, 800 mS, A1 and A2 auto release times. A1 corresponds to 50mS on peaks and around 800mS on sustained program. A2 to 50mS on peaks and 1.5 seconds on sustained program.
Maximum Output Level: Over +26.5 dBu into 600 ohms.
Self-Noise: Less than -75dBu 20Hz-20Khz. -80dBu A-weighted.
THD+N (50Hz- 20Khz): not engaged, less than 0.07% at +20dBu.
Frequency Response, COMPRESS and LIMIT OUT, +- 0.5dB: 15Hz- 30Khz.
Input Impedance: 10Kohms, transformer balanced and floating.
Output Impedance: Less than 75 ohms, transformer balanced and floating, Class A driven.
Compressor Characteristics: Threshold from –20 to +20 dBu on a 41-step precision potentiometer. Ratio selectable on a rotary switch, 1.5:1, 2:1, 3:1, 4:1, 6:1. Release selectable on a rotary switch, 100, 400, 800, 1500 mS, A1 and A2 auto release times. A1 corresponds to 50mS on peaks and around 500mS on sustained program. A2 to 50mS on peaks and 1.5 seconds on sustained program.
Limiter Characteristics: Limit level selectable from 0 to +20 dBu on a 41-step precision potentiometer. Release selectable on a rotary switch, 50, 100, 200, 800 mS, A1 and A2 auto release times. A1 corresponds to 50mS on peaks and around 800mS on sustained program. A2 to 50mS on peaks and 1.5 seconds on sustained program.
Customer Reviews
3.7
Based on 3 reviews
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Afterworkinhours 🇺🇸
Verified Buyer
No customer service or credible warranty
My summing unit failed after 3 months. I had to send it at my expense to a repair facility in NY. They had it for 2 months, claimed they couldn’t replicate the issue and sent it back. I communicated my concerns with Heritage and was told they don’t repair or replace units. They don’t stand behind th...
Published date
03/15/23
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Mike C. 🇺🇸
Verified Buyer
This is Top Of the Line Compressor for your recordings!!!
Classic compressor will cost three time the price of this unit, results and differences are not even noticed for most of engineers. Give it a try and will blow your mixes away!
Published date
03/04/21
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Rey 🇺🇸
Verified Buyer
Sound warm and big!
I never had the neve hardware but ive been using the using Neve 33609 and all i can tell you this is by far better.its making my drums sounding big and fat! Love it.
Published date
09/04/20
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Brandon 🇺🇸
Verified Buyer
OTB Fitness Done Right!
However appealing it might sound, I don’t think anyone would feel the benefits of emulating a physical workout; it’s a head trip. Similarly, this marvelous unit outshines any emulation on the market. Immediately, you’ll hear and feel the muscle and tone applied to any signal passed through it. It so...
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