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Heritage Audio Grandchild 670 Tube Vari-mu Stereo Compressor 500 Series

Heritage Audio Grandchild 670 Tube Vari-mu Stereo Compressor 500 Series
  • Product Code: eq168501
  • Availability: In Stock

$5,997.00 $8,635.68

Glue your mixes and busses together with the distinctive character of tube-driven variable-mu compression, using the GRANDCHILD 670 from Heritage Audio, a two-space 500-series stereo compressor outfitted with four 6BA6 (5749) NOS tubes, three exclusively designed transformers (one per channel and and one for the sidechain), and the select components and circuitry necessary to capture that sought-after warm, analog sound.

For Mixing and Mastering    Based on Classic Fairchild 670 Unit    Vacuum Tubes in Gain-Reduction Circuit    Analog Warmth, Glues Mixes Together    4 Military-Grade 6BA6 (5749) NOS Tubes    3 Exclusively Designed Transformers    Gain-Reduction VU Meter    Input Gain Control, Side-Chain Circuit    Adjustable AC and DC Thresholds    3-Position Active/Bypass/Off Switch

Parameters
Input Impedance15 Kilohms
Output Impedance50 Ohms
Output Level+29 dBu
Frequency Response20 Hz to 20 kHz ±0.5 dB
Self Noise< -78 dBu
Harmonic Distortion< 0.5% at Any Level up to +24 dBu Output (No Compression)
ConsumptionSlightly over 200 mA per Rail per Slot (+16 V / -16 V)
Dimensions(W x H x L): 7.1 x 5.2 x 3" / 180 x 133 x 75 mm
Weight2.6 lb / 1.12 kg
Packaging Info
Package Weight3.055 lb
Box Dimensions (LxWxH)10.6 x 8 x 6.6"

  • Based on the legendary Fairchild 670 compressor and Heritage Audio's HERCHILD 670 model, the GRANDCHILD 670 puts the proven performance of the HERCHILD Model 670 in a cost-effective, two-space 500 series module.
  • The module features an attractive front panel complete with a large, informative VU meter that not only provides Gain Reduction metering, but also shows the unit’s 3-position Active/Bypass/Off switch from a distance. 
  • In common with its big brother, there is an Input Gain control with an adjustable range of 20 dB, the AC Threshold, and 5 selectable Attack/Release times. In addition, the DC Threshold control provides a unique compression curve adjustment combining control of the ratio and knee, soft stepped from hard limiting to a very smooth and transparent, light compression.
  • Use the 3-position high-pass Sidechain filter to reduce the lower frequency´s influence on the detection circuit, a must-have feature for contemporary productions.
  • The stereo GRANDCHILD 670 uses the sum of the two channels to determine the overall amount of gain reduction for both channels, ensuring a stable stereo image.

  • Vacuum tubes in the gain-reduction circuit is at the heart of the specific tonality provided by variable-mu compression.
  • Four 6BA6 (5749) tubes and three transformers ensure classic, top-tier analog performance for your mixing and mastering sessions.
  • It's not easy to achieve that classic warm, hugging, intimate sound that just seems to effortlessly glue together a mix in a musical way, but the GRANDCHILD 670 delivers it, effectively providing that that lush, classy, and elegant tone.

Related Questions and Answers

Q: 1. Could the OTA be mounted on a VersaGO-2 mount?

A: I do not believe we carry the VersaGO-2 mount in our System. My apologies. So I am not familiar with this Mount. However if it's Vixen Style Mount, then it will work.

Q: 2. does this work for Acute 2 systems?

A: This will not work on an Acute 2.

Q: 3. Will this also work with the Cobra 3 monopods?

A: Yes, the iFootage C40 Extension Tube for Cobra 2-Series Monopods will fit the Cobra 3-Series Monopods as well.

Q: 4. Will this product function with wireless Bose headsets from Marshall Amps?

A: No

Q: 5. Does light have +/- green (magenta) adjustment to the white CCT?

A: The CCT in the Dracast X Series LED400 RGBWW Light Tube would control the saturation off green or magneta. The color temperature control would be independent of that.

Q: 6. Is extension tube made of carbon fiber?

A: This tube is made of aluminum.

Q: 7. Does it come with a power supply?

A: Sure does you just need audio cables.

Q: 8. Is there a way to set a password so others can't connect to it?

A: The short answer is no, The unit is a receiver only, and is always ready to pair when not already paired. While DN-200BR is paired with a Bluetooth device, other Bluetooth devices cannot pair to it. You must unpair (disconnect) the current Bluetooth device from DN-200BR to make it available to others. If it is a\already paired, and both devices are always on, nothing else will be able to pair to it.

Q: 9. how many blue tooth devices can be hooked up at once?

A: While the DN-200BR is paired with a Bluetooth device, other Bluetooth devices cannot pair to it. You must un-pair (disconnect) the current Bluetooth device from DN-200BR to make it available to others.

Q: 10. I want to understand pairing with this. Most Bluetooth devices can have multiple devices paired to it and some allow multiple devices to be connected and some only one to be connected. But even the ones that only allow one device to be connected allow multiple to be paired. So, if 1 and 2 are paired, then 2 can't connect while 1 is connected but it can connect as soon as 1 disconnects. If I am reading this correctly only one device can be paired. So for 2 to connect, 1 would have to disconnect and unpair and then 2 would have to pair and connect. Then for 1 to reconnect, 2 would have to disconnect and unpair, 1 would have to pair and then connect. Do I have this correct?

A: You've got it.

25/09/2024

[10.6 x 8 x 6.6"] works great. very expensive.

5
24/09/2024

[15 Kilohms] I don't think one can beat this compressor, especially at this price. The designers aced the features and engineering created a product that does its job quietly, smoothly and highly effectively. The output gain control is great for restoring any overall signal level lost during compression. You can't go wrong with the RNC1773. Kudos too, to B & H: Customer service was able to add some cables effortlessly after my order was placed and before shipping.

5
22/08/2024

[< -78 dBu] Killer quality and sound. It definitely widens the stereo field a bit. The transformer button wont be for everyone. I tried it on the 2 track and didnt like it, but gave it a go on the bass buss and yeah dude big time.

5
13/08/2024

[< -78 dBu] using this to control volume input from high-end piano and output to near field monitors or pair of headphones; works well for intended purpose

5
01/08/2024

[10.6 x 8 x 6.6"] This is a fantastic small form factor side chain compressor which I use as an auto ducker for microphones over an audio source. And the price point makes it a worthwhile investment. My only wish is the input and output connectors were combo connectors for greater connectivity flexibility.

5
29/07/2024

[50 Ohms] The WA76 is not supposed to sound exactly like the modern UA 1176LN as another review has highlighted. The WA76 is an exact replica of the Urei 1176 revision D that was produced in the early 1970s. The current UA 117LN is an amalgamation of revisions C, D, & E. These revisions have minor differences in circuitry dealing with low noise and distortion. The WA76 and UA 1176LN are essentially the same beast, but since they are produced with slightly different circuitry designs, one will hear very subtle sonic variations between the two. Which one you like more is a matter of preference.

5
17/07/2024

[10.6 x 8 x 6.6"] Very nice design!!
Thank's B&H very nice to take care shipping.

5
23/06/2024

[< -78 dBu] Profoto was swamped and so I thought why not try it myself...a couple of videos later (and antistatic gloves), it was a relatively quick and painless swap...back up and running in a fraction of the time!

5
22/06/2024

[50 Ohms] I've considered getting one of these ever since hearing one in my friend's home studio almost 20 years ago. Glad I did-it's a small, lightweight and powerful addition to my guitar rack rig. Preserves high frequency sparkle and source tone nicely. Other high end compressors may add more personality and warmth but if you seek transparent performance without becoming thin, this may be your answer.

5
22/06/2024

[3.055 lb] This compressor punches way above its weight (considering the cost). Great unit for subtle, clean compression. I use mine to ‘glue together’ the final mix in Really Nice mode.

5

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