Issue 93


Ableton Live 12
What’s in. What’s out. What to expect.


Review: Heritage Audio ’73 JR & ’73EQ JR

These baby 1073 clones from Heritage Audio might not have all the right cards, but they’ve got all the right sound.


12 February 2015

It’s a weird feeling squeezing a 1073, clone or not, into a 500 series rack. Over the years, clones have popped up in all sorts of shapes and sizes, but the recognisable ‘look’ of the 1073 is still the 80 series console-format version, with red to grey to blue Marconi knobs stacked one on top of the other, and its long body requiring custom rack mounting.

When Heritage Audio — a company dedicated to cloning the original Neve modules the equal of anybody — first turned its hand to cloning the 1073 for the 500 series form factor, it took up a total of three spaces. Forget double wide, this was half a lunchbox for just one module; exactly the sort of unwieldy presence the 1073 deserved. 


The portly stature of Heritage’s lunchbox edition can be attributed to accuracy. Like most gear built in the ’70s, 1073s were made to be easily serviceable. The 1073 has five individually-populated cards onboard, so if a module goes down, the offending card can relatively easily be swapped out. And when purists are measuring the width of solder trace with a micrometer, replicating the card structure is the only way to satisfy Neve die-hards.

Heritage Audio’s chief engineer, Peter Rodriguez, is a stickler for details when it comes to his clones. So after tracing the transformer windings back to Carnhill, sourcing Marconi-style knobs, and matching the colour code for Neve grey, he knocked out his own PCBs to match the vintage cards, solder trace for solder trace.

The resulting clone looked the part, had everything in its proper place, and sounded as good as AMS Neve and BAE could do, all at a cheaper price. So when Peter first reformatted the 1073 for the 500 series layout, he was loath to change any internals — he wanted it to be the purest purist conversion. He kept all the original cards, transformers, knob and button sizes, and rearranged them into a 500 series chassis. Having purposefully not redesigned the cards to fit into the form factor, it naturally ate up more space than it would if he’d rejigged it. But the message was clear, it was the 1073 rearranged in a 500 series rack, not a redesign.


While Heritage Audio mostly designs accurate clones, Rodriguez is partial to the odd mod. The custom 6673 module is a combination of a 1073 with three more notches on its EQ, and the mid-band of the 1066 added for extra control. Then there’s the 8173, which mashes up the four-band EQ of the 1081, with the Class A output stage of the 1073.

His latest mod does what he never dared do before; abandon the 1073’s standard card design, and split it in half — separating the preamp from the EQ and creating two new single-space 500 series units called the ’73 Jr (preamp) and ’73EQ Jr.

While it means these can’t be retrofitted with 1073 cards, it’s still essentially the same stuff — same transformers, same components, and importantly, the same specs — just rearranged to fit more neatly into 500 series chassis.

Given he’d already jumped away from the form factor both externally and internally, Peter took the chance to add a few mods of his own. First, let’s look at what’s dropped out on the preamp side. When AMS Neve released its lunchbox 1073 preamp, it just ported a single channel of its 1073DPA. When you compare it with Heritage’s offering, AMS misses the boat a little when it comes to the flexibility of the 500 series format.

The extras on Heritage’s ’73 Jr include an ultra-high impedance, class A J-FET DI on its front panel, with an auto-sensing input and a green LED indicator to let you know it’s taken over the input stage. The input is placed before the input transformer, so you’re not missing out on anything in the preamp chain.

The ’73 Jr also includes one of the hi-pass filters from the 1073 — an 18dB/octave filter at 80Hz — it’s the most common sense, useful option, with the others being at 50, 160 and 300Hz. I like this move, it means Heritage’s ’73 Jr side is a fully usable preamp, without having to add the EQ section to get the filter.

The other common features of 1073 products are all there too: A switchable input impedance — 300Ω or 1200Ω — with an increase in impedance at higher gains, a phase flip, a line input selector, and a +48V phantom switch.



    ’73 Jr: $1099
    ’73EQ Jr: $1199


    Soundtown: (08) 9242 8055 or

  • PROS

    • 1073 split into single lunchbox spaces
    • Preamp includes DI & hi-pass filter
    • Selectable high frequencies added to EQ
    • Build quality & attention to detail

  • CONS

    • Not an exact 1073 replica, if that’s what you’re after
    • No detent at 0dB on EQ line level trim
    • Numbering a little close to knobs


    Heritage Audio has split the 1073 down the guts to fit the preamp and EQ into separate 500 series slots. The preamp has gained a DI input and hi-pass filter, while the EQ still carries the same line level preamp of the 1073. A great pathway to get into real 1073 tone without investing in 80 series enclosures.


I own two much-loved and well-used 500 series AMS Neve 1073 preamps, so I was very excited to plug in the Heritage units side by side and see how they compare. The Heritage units sounded great, but interestingly, noticeably different to the Neves. Running a variety of sources through the Heritage preamp, I found the high end, in particular, was more rounded than on my Neves. The smoother sound immediately reminded of the company moniker. With a name like ‘Heritage’ they are definitely sticking firm to the tried and true rock ’n’ roll adage, “I like your old stuff better than your new stuff”. The Heritage preamp sound struck me as having more of a tape-like, dare I say it, ‘vintage’ rounded quality than the AMS Neve. The gain structure and feel of the lower and mid frequencies felt almost identical between the two brands. That mid range thickness and bite, which is such a big part of the classic Neve tone, remains intact in the Heritage preamp.

The Heritage ’73 EQ Jr shares the same kind of layout as the original Neve console. It has an adjustable high shelf, mid range and lows, with the same frequency increments and fixed Q as you would expect to see. Boosting the highs only slightly immediately added a genuine sparkle without an ounce of harshness, nicely counterbalancing the slight high end roll-off that naturally comes with the Heritage pre. In fact, the pre and the EQ worked superbly well in tandem. The subtractive abilities of the mids to perfectly clear out the muck in my ’70s Wurlitzer electric piano tone were of particular note, achieved once again without having to turn the knob too far. Be careful, this EQ is surprisingly powerful and is capable of seriously shifting your sounds around, so it’s to be used with a delicate touch to achieve the best gently coloured results.

I found the combination of the Heritage Audio ’73 Jr and ’73 EQ Jr to be a highly impressive recreation of a 1073 Neve. Not just any ol’ sterile channel but one that has had some serious rock ’n’ roll juice poured into it for generations, well primed and ready to give you some classic tone, steeped in history. — Henry Wagons


One important difference between this model and most other 1073 versions — vintage or modern — is the way the gain is set out. It still has a full 80dB of gain, just like a normal 1073, it’s just arranged in a slightly different way. On a standard 1073, mic and line levels are on the same knob; 80dB of mic gain at the top end, back through to Off, then a range of +10dB to -20dB line level gain below that.

On the ’73 Jr, the gain knob goes from +25dB to +80dB, and there’s a 20dB pad to drop the input level before it hits the transformer, which makes the unit even more flexible, and cleaner on loud sources. On the flipside, when combined with the output level, you can essentially choose how hard you want to drive the transformers with a wider range of input sources. You can pad down the input and drive the gain to add that little bit extra harmonic content on the way in.

The line level gain has also received a boost, with up to 50dB of gain. Just don’t click past 50dB. It’s tempting to think you can add harmonics and roll off the level using the output control, but it just clips.

Speaking of the output control, it has no markings, but it goes from 0dB, when fully clockwise, to -∞ at its opposite position. What does all this amount to? Well, you can pretty much drive this mini-1073 in even more flexible ways than the original — from super clean to the maximum saturation allowable.


While the preamp side gained a hi-pass filter, the ’73EQ Jr lost it. It’s a bit of a shame, because the low-cut filter combined with a low boost can provide some really outstanding results for bringing out the body of instruments without the boom.

But as a standalone EQ, in my mind it makes more sense to have a flexible three-band EQ anyway, than include filters if they don’t fit. The EQ features the same smooth Baxandall high shelving, with added 10, 16, and 20kHz options around the previously fixed frequency of 12kHz. The 1073 EQ low shelf and dual inductor mid band are also there.

Probably the key point to note is it has the same type of transformer-coupled line level preamp with the same Class A transformer-balanced output stage as the 1073, with a range of -20dB to +6dB. So you don’t have to buy the ’73 Jr to get the full 1073 tone if you’re just after the EQ.


I put both units into an SM Pro Juicerack 8, and fired it up. They both only use less than 90mA at ±16VDC, which is well within the VPR alliance spec. The Juicerack makes hooking up units designed to flow together simple. You just choose the two slots you want to link and Feed one into the other.

The first thing I plugged in was a Fender Precision bass straight into the DI input. I’d been using a DI into another Neve pre, but the EQ on the way in really helped immediately dial in the sound I was after. Once we hit on the sound, the bass player stayed around longer than he’d planned to make sure we’d finished the last track because he liked it so much. I wasn’t losing anything in the DI stage, there was plenty of low end. And even though boosting at either end of the spectrum is more-ish, a couple of dB at 110Hz and some high-mid boost was all that was required. You can definitely overcook things with too much bass — a good problem to have.

On electric guitar, the ’73 Jr delivered a confidence in the lower mids and balance up high that just represented the Vox/Tele lightly crunchy combination really well.

My impression of the Heritage ’73 Jr, and just in general, 1073 preamps, is they’re not necessarily the premier choice for every source. But that they do sound the best or equal to the best on a lot of them, and never sound bad. Most noticeably the way it treats the high end; I wouldn’t say it’s the breathiest preamp going, but it doesn’t round off highs or give vocals a hyped edge. A bit of high-shelf boost of the ’73EQ Jr  gave a broad airiness to the take, and cutting some lower mids showed how powerful the EQ can be, just a little scoop was all it took to clear out the mud.

On snare, it was the perfect match with the standard SM57. Knocking the impedance back down to 300Ω, the snare had plenty of body and you could hear both the crack and snare wires come through in good balance.

Build quality is pretty special on these. Internally, you can see the Carnhill transformers in a neat, condensed layout, and all the switches feel like they’re built to last. The only issue I have is the frequency readings below the knobs are so close to the knobs’ perimeter, they’re almost hidden. But you tend to work by feel after a while anyway, just listening to the results. The knobs on the EQ are also mounted to a board, so there’s a tiny bit of wiggle room, and they all wiggle together. Knob markings all line up though, and you get a nice solid click on the outer concentric frequency selectors and preamp input gain pot. However, there’s no centre detent at 0dB on the line level input control on the EQ, which would have been nice.


It’s hard to compare the ’73 Jr and ’73EQ Jr to the 1073, because by splitting the two, you’re creating two distinct beasts. Here’s my logic on it: If you’ve got a 500 series rack and you want the 1073 sound, the Heritage Audio 1073/500 is the most accurate 1073 clone you’re going to get for the format. It’s got all the sound, including the combination of high-pass filter and low shelf, which is a handy tonal device. If however you’re after the most versatile 1073-inspired preamp for your 500 series rack without the EQ, the ’73 Jr with the addition of its DI input and hi-pass filter is the best one out there. And for those that just want really sweet, simple three-band EQ for broad but effective tonal shaping, the ’73EQ Jr will give you that control without sacrificing the 1073 signal path.

These two little junior boxes are a worthy addition to the broad 1073 lineage, giving more people, and perhaps younger, junior generations, access to a classic sound. It’s still not cheap, but worthwhile.


Leave a Reply

Your email address will not be published. Required fields are marked *

More for you

Filter by
Post Page
Reviews Dynamic Microphones Audix Issue 93 Korg Drum Microphones Issue 92 Digital Console Yamaha Issue 91 Audio interface Zoom 500 Series SSL Wireless Microphone Systems RØDE Issue 90 Sennheiser Handheld Recorder Issue 88
Sort by
Issue 93


Ableton Live 12
What’s in. What’s out. What to expect.