FAQ

Q: Is this another Neve* clone?
A: The JC1272 is not a clone of anything. It uses the same preamp and output stage from the class-A 1272 buss amplifier module, but with an entirely unique gain structure as well as proprietary input and output transformers, all of which combine to give user the ability to create a variety of tones, from authentic, traditional British class-A to cleaner vintage to outright overdrive - all with a much finer degree of control than previously available on any circuit people might consider similar.

Q: Why do you call it 'JC1272'?
A: My initials are JC (Joel Cameron), and the amp stages are based on the ones found in the classic 1272 buss amplifier module. I just put the two together.

Q: Why does a preamp based on this topology have 3 knobs, all of which affect gain/overall level?
A: It's all about giving the user creative control over the tone. Preamps based on similar topology have two knobs, one for 'gain' and the other to control output level/trim. Those units have a gain switch design that alters both the gain of the active stages as well as a switched, passive pad network working together to achieve the various net gains. Without the pad networks, the lowest total gain of any class-A Neve* style mic amp is 40dB. Lower total gains are achieved by the use of the pad network between the input transformer and the first active gain stage. Therefore a 20dB setting on a 1073 (and its clones) is really 40dB of actual gain with a -20dB pad on the front end. For the sake of creative flexibility I have chosen to split these into separate pad and gain controls.

Add to these two controls the output level control, and you have three knobs to control craft the overall circuit level and the TONE!

Q: What's so creative about separating the pad and gain functions?
A: The 'ATTEN' (attenuation) control on the JC1272 is continuously variable. The switched pad networks used by otherwise similar circuits jump in 5dB steps. If 6dB represents a doubling of signal power (which it does), then you can see how dramatic 5dB steps are. With those designs you may almost have the character you want with one gain setting, and then find that the next is too far removed from what you were aiming for. With the JC1272's continuously-variable attenuation control you can precisely dial in the amount of 'drive' you want for your signals.

Also, the traditional gain switch design removes the pad at higher gains. With this simple design deviation you can now select the character of higher active gains and temper the input level to compensate. The result is a different type of 'clean' tone that no other variation of this circuit can produce... it yields a 'cleaner' character, but still beautiful and lush!

Q: What's so 'proprietary' about your transformers?
A: They're made only for me. It just comes down to my personal preference. I like to think I'm picky about tone (my wife just says I'm picky :)

The transformers used by other builders are excellent, but over the years I have consistently preferred the dynamic responsiveness of those wound by the original supplier of these designs. To this end I worked with Carnhill Transformers in England to create new designs that restored the full dynamic range and rich texture to these revered amp stages.

Q: Does it come in a single channel version?
A: Yes, both dual and single channel versions are available.

Q: What is the cost?
A: The dual channel JC1272 is $1750. The single is $950.

Q: Do I have to buy a separate power supply?
A: No, the JC1272 features a stable, fully grounded internal power supply.

Q: Where can I buy one?
A: The JC1272 is a direct sale only item at this time. Contact me to order.

Q: Do you have a demo policy?
A: Yes. Please contact me for more information.

*Neve is a trademark of AMS-Neve Limited.
JC1272.com is not in any way affiliated with this entity.