Time at JLM Shop:
We are back! Thanks everyone for your orders while we where away. LA500A kit and other backorders are being packed and shipped as quickly as possible.

LA500A Opto Compressor

LA500A Opto Compressor
  • Click to enlarge

5.0 average, based on 1 reviews

$988.90AUD inc GST for Australian Customers
(Approx $720.30USD outside Australia)

Product Information
Stock Level3

NEW LA500A Opto Compressor .NEW A Version has extra Slow attack mod and link with leds on front panel and 3 PCB no wiring layout. Order 2 x LA500A at once for a matched pair

  • LA500A Opto compressoris our MAC compin a API500 & 51X series format. It isfull ground up redesign of the LA3A/LA2A type compressor with several extra features. We have kept all the audio oddities of the side chain to keep the compression signature and extreme compression depthbut added extra ratio of 5:1 to 10:1 and side chain HPF switching FLAT, 100Hz & 200Hz so the low end can be fully compressed or removed from the side chain to let the low end breath and make it easy to balance the compressed sound.The audio path has been fully redesigned for better signal to noise and headroom while still having a clarity and warmth so that it is at home tracking anything or paired on stereo buss duty. The LA500 is made so even at extreme settings is it hard to make the comp sound anything but fantastic.
  • For an idea on what the LA500 / MAC comp can do read this Audio Technology magazine review here
  • Recall Sheet can be found here

Features for each Channel

  • NEW Pull threshold pot for slow attack with orange led on front panel
  • NEW Pull Makeup pot for stereo linking of compressors with blue led on front panel
  • 51X and 500 compatible with 51X pins cut off. LA500 fits all 500 and 51X racks and lunchboxes.
  • 3 x PCB's have all parts values directly on overlay for fast building.
  • Large 34mm white LED backlight GR/VU meter.
  • Hard relay bypass when comp power off or switched to LA OFF.
  • Meter switchable Gain Reduction / LA OFF (meter led off) /  VU by toggle switch
  • Electronic balanced input to handle extreme input levels without distortion.
  • Large 32mm chicken head input level control for easy setting of compression level.
  • Large 32mm Makeup level pot with 0 to 20dB of gain.
  • Ratio switchable 3:1, 5:1 & 10:1 by toggle switch
  • SideChain High Pass Filter switchable FLAT, 100Hz, 200Hz.
  • Huge output transformer (same size as Neve LO1166).
  • Internal jumper for output ground lift.
  • Double sided Gold plated rear edge connector.
  • 3mm black anodised laser cut, vertical linished with white lasered on text for long lasting zero wear finish.
  • Mix buss output on pin 11 for Radial Workhorse rack


Recall Sheet here

Compressor samples by JLM Audio

Orders shipping to an Australian Address will have 10% GST added to the price below at checkout


Customer Reviews

Average Rating: 5


This beauty is quite a lovely beast in an amazingly small package... the JLM LA500A performs admirably amoungst our other tube compressors, and we own tube gear from Pendulum, Manley, Fearn, A-Designs, Avalon etc, so this is not a small claim. Great on vocals, superb on bass, and I even like it on acoustic guitar, and I don't like to compress acoustics, generally. Joe Barresi is correct; this is a great little compressor! Don't let its size or price fool you. Kudos to JLM! Cheers (Thu Dec 14 2017, 02:07 am )

Write Review

Please enter a valid email address.
This field is required.

Follow Us

Mailing List

Enter your e-mail address to receive our newsletter
Please enter a valid email address.
Email address already subscribed. Continue if you wish to unsubscribe.