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Heritage Audio’s most ambitious piece of outboard gear to date.

Have you ever dreamt about a single piece of outboard gear that could take on any source – vocal, instrument or LINE level – and turn it into a fully shaped and controlled signal with all the color and dynamics that you could ever desire? The TUBESTRIP is that piece…(and it’s ready to change your recordings from the moment you switch it on.)

KNOW ME

THE NEW GOLD STANDARD FOR TRACKING AND SCULPTING ANY SOURCE

For decades, achieving apex results meant owning a room full of the right gear, knowing which unit to reach for on which source, and spending years learning how to make them work together. The TUBESTRIP changes that equation completely. Vocals, drums, guitars, bass, keys, room mics, acoustic instruments… whatever you place in front of it, the TUBESTRIP has the tools, the character and the intelligence to take it exactly where it needs to go. Four processors working as one coherent instrument, each one drawn from some of the most respected designs in recording history.

THE TUBESTRIP IS YOUR ALL TUBE ULTIMATE CHANNEL STRIP

The TUBESTRIP combines 4 essential top-notch processors into one convenient 3-unit high, 7,6 kg / 16.8 pounds, ultimate all-tube recording channel. Packed with the best selection of tubes available, custom-made transformers and inductors you can certainly expect a very exciting and evocative sound that will bring your recordings to life. Drawing extensively from HERITAGE AUDIO’s deep engineering knowledge and from some of their most popular designs, the TUBESTRIP is not so much a collection of processors and features, but more of a coherent instrument, designed to work as one.

H-LOGO-heritage.audio
USER MANUAL
H-LOGO-heritage.audio
BROCHURE
Demos
Features
Specifications

 

  • All tube signal path from Input to Output.

  • Unique tube-based Preamp with special morphing capabilities.

  • 4 x Carefully Selected Tubes: NOS for the Preamp and the Vari-Mu and JJ for the Output stage.

  • 4 x Custom-Made Transformers – MAIN INPUT & OUTPUT, Vari-Mu In/Vari-Mu Out.

  • Intuitive and effective inductor-based EQ.

  • Vibey VARI-Mu compression delivered by a full Lang P.LANE circuit with the Seawell mode built-in.

  • A 1 knob fixed mode 1B for unlimited transparent compression.

  • De-essing option for transparent sibilance control.

  • Convenient OUTPUT control.

  • Attractive and sturdy build.

  • Universal power supply built in

  • Input Impedance: 15 kΩ. 
  • Output Impedance: 50 Ω. 
  • Output Level: +29 dBu. 
  • Frequency Response: 20 Hz to 20 kHz ± 0.5 dB. 
  • Self Noise: Less than -78 dBu. 
  • Harmonic Distortion: Less than 0.5 % at any level up to +24 dBu output (no compression).
  • Dimensions (W x H x L): 180 mm x 133 mm x 75 mm.
  • Weight: 1.120 Kg.
  • Consumption: Slightly over 200mA per rail per slot (+16V/-16V). 
GRANDCHILD 670 500
Customer Ratings
It delivers that euphonic color that we sought for!
December 29, 2023
Sweet and punchy, it adds that "je ne sas qui" that enhance whatever goes through it. I can see myself using it in every recording, mixing and mastering session.// AEhrlich
Sweet and punchy, it adds that "je ne sas qui" that enhance whatever goes through it. I can see myself using it in every recording, mixing and mastering session.
Does what you would expect a great Vari-Mu to do.
December 22, 2023
It would seem that I'm one of the few people out there with a Grandchild. I picked up a unit from Alto Music last week. I bought it to replace a Retro Revolver, and so far I couldn't be happier with my purchase. I don't have any experience with an actual Fairchild or hardware Fairchild clones, but the Grandchild does what you would expect a great Vari-Mu to do. It seems to add a depth and weight that I've never really experienced in another unit or plug-in. I've seen people commenting on how clean it sounds, but I would say its far from transparent. It definitely does a thing. My biggest struggle so far is figuring out what I'm going to use it on while mixing. It sounds great on everything I've thrown at it.// 1985labs
It would seem that I'm one of the few people out there with a Grandchild. I picked up a unit from Alto Music last week. I bought it to replace a Retro Revolver, and so far I couldn't be happier with my purchase. I don't have any experience with an actual Fairchild or hardware Fairchild clones, but the Grandchild does what you would expect a great Vari-Mu to do. It seems to add a depth and weight that I've never really experienced in another unit or plug-in. I've seen people commenting on how clean it sounds, but I would say its far from transparent. It definitely does a thing. My biggest struggle so far is figuring out what I'm going to use it on while mixing. It sounds great on everything I've thrown at it.
Grandchild exceded my expectations.
December 21, 2023
It has the *thing*. Its been so long since I've purchased anything with the thing, and I had the Unfairchild for a while (big respect, yet, no 'thing'). The thing isn't necessarily the actual compression, and calling it 'glue' will reduce it to a mere funcional trait. I'm using much of my brain power to not call it magic, but it feels like I now posses magic in my lunchbox.// J.views
It has the *thing*. Its been so long since I've purchased anything with the thing, and I had the Unfairchild for a while (big respect, yet, no 'thing'). The thing isn't necessarily the actual compression, and calling it 'glue' will reduce it to a mere funcional trait. I'm using much of my brain power to not call it magic, but it feels like I now posses magic in my lunchbox.
Instrument became alive instantly.
December 29, 2023
Gotten mine today. Those tubes inside are huge! I expected a bunch of these tiny tubes that you’d find in certain guitar pedals. Threw it on a cp-70 emulation and the (software-) instrument became alive instantly. I really like that thing and can’t take it off anymore. Its a bit like wanting a Lambo but then getting a 911 and loose all gravings because it delivers so well and is generally a way more digestible fit.// _Commander_
Gotten mine today. Those tubes inside are huge! I expected a bunch of these tiny tubes that you’d find in certain guitar pedals. Threw it on a cp-70 emulation and the (software-) instrument became alive instantly. I really like that thing and can’t take it off anymore. Its a bit like wanting a Lambo but then getting a 911 and loose all gravings because it delivers so well and is generally a way more digestible fit.
A FAIRCHILD?
February 14, 2024
I own 500 format compressors and also hardware tube compressors. My impression: The Grandchild 670 seems to be in a different league compared to other 500 format compressors. The Grandchild 670 is not an analytical compressor, it colors the sound by changing the frequency spectrum. But it does it in a very nice way, typical of tubes. In direct comparison to other hardware tube compressors, I experience the same airy sensation typical of tube devices with transformers such as L2A2, Collins, etc. The device emulates the legendary Fairchild compressor. In direct comparison to Fairchild's excellent Universal Audio Plugin, I like the Grandchild 670 much better. The compression is certainly comparable, but I like the sound of the Grandchild better. A comparison with the 500 series Anamod 660 module favors the Grandchild for the same reason. As with all Heritage Audio devices, the workmanship of the module is excellent.// Rainer Weissauer
I own 500 format compressors and also hardware tube compressors. My impression: The Grandchild 670 seems to be in a different league compared to other 500 format compressors. The Grandchild 670 is not an analytical compressor, it colors the sound by changing the frequency spectrum. But it does it in a very nice way, typical of tubes. In direct comparison to other hardware tube compressors, I experience the same airy sensation typical of tube devices with transformers such as L2A2, Collins, etc. The device emulates the legendary Fairchild compressor. In direct comparison to Fairchild's excellent Universal Audio Plugin, I like the Grandchild 670 much better. The compression is certainly comparable, but I like the sound of the Grandchild better. A comparison with the 500 series Anamod 660 module favors the Grandchild for the same reason. As with all Heritage Audio devices, the workmanship of the module is excellent.
Set to become a new classic
February 02, 2024
I was looking for a recognized mixbus and mastering compressor, but, for a question of musical style, less tense and punchy than an SSL, less 80's connotation. This is exactly what this Grandchild offers, a high-class compression, very transparent, but softer and silkier than the SLL. We really find the character of a Fairchild, the attack and release times are the same, it is not for nothing that the Fairchild is legendary, whatever the settings, it is very difficult to make it sound bad. Tested in a hybrid analog/digital config on mixbus at the analog console output, it handles high levels without flinching and what comes out is always improved, thickened, better balanced in frequency. I left the low cut setting as original, so it is in the intermediate position, i.e. -12dB at 100Hz. It works perfectly with music that is quite heavy in low frequencies, no pumping effect when remaining in a low reduction (mixbus). I think it will also be very useful for voice recording, for peak control, as an alternative to an optical compressor, in a less colorful register than an LA2A, but with much greater versatility of use. Like many, I haven't had the opportunity to test a real Fairchild 670, just plugins. But I have, in hardware, an LA2A and a formidable vari mu with Retro 176 tube (tribute to the UA 176). So I'm used to high-end analog tube compression. I find that despite the use of tubes only for compression (principle of vari-mu compression) and not in the rest of the signal, the sound of the Grandchild is really open, clean and warm at the same time, in short close to a high-end lamp device. Heritage Audio's reputation is well established and here again, they have surpassed themselves by successfully adapting the concept of the Fairchild 670 limiter in a 2 unit wide module in the 500 series. I do not regret my purchase and have already planned the re-mastering of all my titles using this device.// Mr Haze
I was looking for a recognized mixbus and mastering compressor, but, for a question of musical style, less tense and punchy than an SSL, less 80's connotation. This is exactly what this Grandchild offers, a high-class compression, very transparent, but softer and silkier than the SLL. We really find the character of a Fairchild, the attack and release times are the same, it is not for nothing that the Fairchild is legendary, whatever the settings, it is very difficult to make it sound bad. Tested in a hybrid analog/digital config on mixbus at the analog console output, it handles high levels without flinching and what comes out is always improved, thickened, better balanced in frequency. I left the low cut setting as original, so it is in the intermediate position, i.e. -12dB at 100Hz. It works perfectly with music that is quite heavy in low frequencies, no pumping effect when remaining in a low reduction (mixbus). I think it will also be very useful for voice recording, for peak control, as an alternative to an optical compressor, in a less colorful register than an LA2A, but with much greater versatility of use. Like many, I haven't had the opportunity to test a real Fairchild 670, just plugins. But I have, in hardware, an LA2A and a formidable vari mu with Retro 176 tube (tribute to the UA 176). So I'm used to high-end analog tube compression. I find that despite the use of tubes only for compression (principle of vari-mu compression) and not in the rest of the signal, the sound of the Grandchild is really open, clean and warm at the same time, in short close to a high-end lamp device. Heritage Audio's reputation is well established and here again, they have surpassed themselves by successfully adapting the concept of the Fairchild 670 limiter in a 2 unit wide module in the 500 series. I do not regret my purchase and have already planned the re-mastering of all my titles using this device.
Really good!
April 01, 2024
It just makes the signal better and more noticeable, not just minimal. There are some examples online that are not optimized in terms of gain, so I immediately tried it on a master, adjusted the volume and the result is: Good glue throughout the file, a kind of widening of the stereo base, a little Warmer in the bass but still not smooth. Very useful for mixing and mastering!// JohnPiano
It just makes the signal better and more noticeable, not just minimal. There are some examples online that are not optimized in terms of gain, so I immediately tried it on a master, adjusted the volume and the result is: Good glue throughout the file, a kind of widening of the stereo base, a little Warmer in the bass but still not smooth. Very useful for mixing and mastering!
A Fairchild for everyone!
October 10, 2024
Revelation! I have had this compressor since April 2024 and I am increasingly surprised. The Grandchild 670 has identical compression character to the original Fairchild 670 in a minimalist casing. It is true that there are minimal differences in the color of material processed with similar parameter settings between Grandchild and Fairchild, but this can only be heard and noticed when using high-quality headphones or monitors in a studio with excellent control room acoustics. . In my opinion, the difference is that after processing in Granchild there is a little less detail in the upper mids, but a little more in the bass. Everything else is insignificant to the average listener, making it an excellent tool for mixing and mastering at the highest level. And considering the price, comparing it to its Heritage Audio sibling, the Herchild 670, it's a pure eye-opener and a surprise! I definitely recommend it to anyone who always cares about the nobility of sound and beauty! // Dareczek
Revelation! I have had this compressor since April 2024 and I am increasingly surprised. The Grandchild 670 has identical compression character to the original Fairchild 670 in a minimalist casing. It is true that there are minimal differences in the color of material processed with similar parameter settings between Grandchild and Fairchild, but this can only be heard and noticed when using high-quality headphones or monitors in a studio with excellent control room acoustics. . In my opinion, the difference is that after processing in Granchild there is a little less detail in the upper mids, but a little more in the bass. Everything else is insignificant to the average listener, making it an excellent tool for mixing and mastering at the highest level. And considering the price, comparing it to its Heritage Audio sibling, the Herchild 670, it's a pure eye-opener and a surprise! I definitely recommend it to anyone who always cares about the nobility of sound and beauty!
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