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Lindell Audio PEQ-501a 500 Series Retro 2-band Program Equalizer Demo

500 Series 2-band Program EQ
4 Write review Item ID: PEQ501ad1

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Lindell Audio PEQ-501a 500 Series Retro 2-band Program Equalizer
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Classic-style 500 Series Program EQ from Lindell

Lindell Audio's take on the American classic EQP1 program equalizer, the PEQ-501A serves up the smooth highs and absolutely huge bottom end generations of engineers have made a cornerstone of countless legendary recordings — and you don't want to be without. Designed for the convenient 500 Series format, the PEQ-501A features switchable hardware bypass that allows for A/B accuracy, while meticulous build quality with gold-plated PCB internals delivers clean and highly professional sound. For easy, accurate settings recall, all rotary controls are stepped — a feature mastering engineers at Sweetwater really appreciate.

Related Videos: PEQ-501a 500 Series Retro 2-band Program Equalizer

Lindell Audio PEQ-501A 500 Series 2-band Program EQ Features:

  • Extended high-frequency range: 1KHz, 1.5KHz, 2KHz, 3KHz, 4KHz, 5KHz, 8KHz, 10KHz, 12KHz, 14KHz, 16KHz
  • Extended low-frequency range: 20Hz, 30Hz, 60Hz, 100Hz, 150Hz
  • Transformer-balanced output
  • Designed around vintage 1731 op-amp
  • Hand-wound inductor
  • Stepped rotary controls
  • Gold-plated PCB internals
  • Real hardware bypass
  • Compatible with 500 Series racks

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Additional Media

500 Series Buying Guide
Signal Processing Buying Guide

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Tech Specs

  • Type: 500 Series EQ
  • Number of Channels: 1
  • Controls: Low Freq, High Freq, Attenuation, Bandwidth, Boost
  • Number of Bands: 2
  • Q Type: Stepped Rotary
  • Freq Range High: 1kHz, 1.5kHz, 2kHz, 3kHz, 4kHz, 5kHz, 8kHz, 10kHz, 12kHz, 14kHz, 16kHz
  • Freq Range Low: 20Hz, 30Hz, 60Hz, 100Hz, 150Hz
  • Bypass: Yes
  • Power Usage: ±16V DC
  • Module Slot Size: Double
  • Manufacturer Part Number: PEQ501A

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Customer Reviews

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Fantastic Pultec clone

I like this enough to want another for a stereo pair. All controls are stepped so a pair can be used on the master bus very nicely. It's HF boost has so many frequencies that it's even more versatile than plugins. Knobs are nice and tight and have a good solid feel. Most importantly the tone is just fantastic! It's got that Pultec cut/boost on the lows for nice tight bass. The low pass filter has more EQ points who's frequencies are closer together that real Pultecs or plugins so I find that more flexible and useful. The HF boost can go a lot lower than typical so again, more flexible and sounds great.

After doing sweep analysis it's EQ curves were in line with several pultec plugins and far more true to a real Pultec than my Klark Teknik EQP-KT which I hope to sell so I can buy another one of these. No noticeable noise floor, just pure tone. The API style op amp design means it responds faster to transients than a real tube pultec. I also prefer the 500 series format instead of a 2U 19" rack form factor.

My only complaint is the super bright power L.E.D. which reminds me of an airport runway light. Anyway, red dot stickers cover it nicely and since that doesn't alter it's functionality or tone, I can live with it. Although I could envision disconnecting it once the warranty is up. My Chameleon Labs 560 EQ has the same issue so it got a red dot sticker as well.

Summary, great tone, great features and don't forget... a great price! I'm looking forward to buying another.
by Les Paul 2550 from SW Florida on
Music background: Engineer, producer, songwriter, multi-instrumentalist

PeQ-501a is an A+ Unit

There are so few reviews out on these that, to me, meant one of three basic things - 1) It's terrible - but try to find a used one, so that's out. 2) They simply aren't moving - but they're still being made, so that's out. 3) They're a good unit but they're not paying "influencers" to promote it. So I gave it a shot and I was not disappointed.

I've been comparing these to the PEX plugin, the BRA VEQ-1P, and my HRK EQ550P units. First off, there's no tubes, so... Second off, on the low end, I've noticed on both sets of my hardware that the low frequencies need more boosting to match the plugins. That being said, these have a completely different sound/flavor than the HRK units. Solid State, clean, punchy, bold, yet tasteful. It can range from subtle to extreme with ease. The high frequency bandwidth control is quite useful and you can tell a change when using it. I prefer this to both plugins mentioned, and I do prefer this on most things over my HRK units. These now sit on my mixbus for mixing and mastering. Easy to match, easy to recall, the extra frequencies are nice, and the sound is stunning. Don't let the lack of reviews scare you off. If you have the extra space in your racks, go for it!
by Drew Brown from Nampa, ID on

Get this!!!!

Just got into the world of 500 series. Got this unit(waiting for the 2nd) along side 2 DBX 560A comp/limiters. This EQ is pure magic, I immediately ran some drums through it to beef it up and wow. The amount of body you can had to drums is incredible. I'm no professional and never used an original Pultec but I'm sure this is on par with that wrong what I've seen online.
by Ivan Brito from New Jersey on
Music background: HIPHOP/R&B

Good, but did not impressed me

I ordered a pair of them with the Hope I could use them on busses. As this is stepped it was almost a perfect piece to me at this price to have choices OTB. unfortunately I had to return them and I will explain why.

The first thing that annoyed me is that I could not put them properly in my rack, as the holes did not match exactly and could not screw them in place.
Beyond this oddity, to review how it sounds : I found the high end quite nice and its attenuation musical, which is the quality of a nice passive EQ. On the other side, the low end did not impressed me at all and seemed to be quickly invasive. Even with 1 db increments, I found myself with too much low end quite rapidly on many settings and the attenuation to be a bit drastic which to me feels quite the opposite of the Pultec EQ it is modeled after.

Overall, beyond the holes/faceplate issue, I think it is a fair EQ, at this price point it is hard to ask for a lot I guess. Being stepped you can recall it super fast and that's a great plus.
But when you are going for a pair and don't get impressed at all, it is better keeping the money for something else I think.
by Jim on
Music background: Mix engineer, Audio engineer
See also: 500 EQ, Lindell Audio, Lindell Audio 500 Series EQ
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