Drawmer DL241 (1990)

Drawmer's first "programme adaptive" dynamics box - a two-channel compressor, expander and limiter that set out to make clean, musical gain control nearly automatic.

Overview

The DL241 is a dual-channel analog dynamics processor that Drawmer itself calls a "Dual Auto Compressor" - a compressor, expander/gate and limiter sharing two channels of circuitry. It arrived in 1990. According to Soundpure's history of the line, it was the first product to carry Drawmer's "programme adaptive" circuitry, and it beat the DS404 Quad Noise Gate to market by a year.

The balance between automation and control is the interesting part. Vintage King says the unit "incorporates many automatic functions allowing the engineer to achieve optimum results in the minimum set up time but does not compromise skilled users with limited controls." So it does a lot of the thinking for you, but it doesn't lock you out of the decisions. The front-panel controls the user manual lists are Threshold, Ratio, Attack, Release and Bypass. The automatic functions sit alongside them rather than replacing them.

It was built for studio, live and broadcast work, and the fact sheet places it in the "high-end, boutique-grade" tier aimed at critical applications. Two channels make it useful for stereo busses and for tracking vocals or instruments, and the expander/gate section gives it a job beyond plain compression. Frequency response runs 20 Hz to 20 kHz. The user manual quotes distortion plus noise at better than 0.05%, and the PDF manual lists 10 kHz figures of under 0.03% and under 0.1% across two columns. None of that is exotic on paper.

Key Features

Programmed Adaptive Expansion Gate

The expander/gate is where the DL241's "auto" reputation comes from. Drawmer's "Programmed Adaptive Expansion" circuitry, as described by Soundpure and ZenPro Audio, is designed to allow effective single-control operation. It gives a fast, smooth response and eliminates "chatter" on or around the threshold. Anyone who has fought a gate that stutters on a breathy vocal or a noisy guitar amp knows what that's worth.

Auto/Manual Attack and Release

The period advertising, as it ran in Recording-Engineer (July 1991, p.41), billed the DL241 as a "dual channel gated compressor/limiter" with "Auto/Manual Attack/Release." The unit can manage its own timing, or you can take over manually.

Fully Balanced Hard-Wire Bypass

B&H Photo's listing for the DL241XLR notes a fully balanced hard-wire bypass that connects input directly to output, so signal passes through the unit with no power applied. In a studio rack, a dead unit or a pulled power cable doesn't take the session with it. B&H also points to the zero-response-time peak limiting as a way to avoid unpleasant distortion when mastering for CD or feeding digital equipment.

Two Connector Versions: XLR and TRS

Drawmer offered the DL241 in two flavors. The XLR version, often listed as the DL241XLR, has fully balanced inputs and outputs. The stereo-jack TRS version has fully balanced inputs but single-ended outputs, according to ZenPro Audio and M2M Pro. The wiring convention, per the Drawmer operators' manual, is standard: tip hot, ring cold, sleeve ground on the jacks; pin 2 hot, pin 3 cold, pin 1 ground on the XLRs. Confirm which version you're getting, because the two are not interchangeable at the connector level.

Switchable Operating Level

Soundpure notes that the operating level can be instantly switched, independently on each channel, between +4 dBu and 10 dBu operation via a rear-panel push switch. One channel can sit at studio level while the other handles a hotter or colder source, with no re-patching.

Complete Metering

The original advertising promised "Complete Metering: Gain, Input, Output," and the period copy in Recording-Engineer (July 1991, p.41) is consistent with that. The DL241 was sold on showing you what it was doing at each stage.

Historical Context

The DL241 came out in 1990 and, per Soundpure, was the first Drawmer product to use the company's "programme adaptive" circuitry. It sits within a broader Drawmer dynamics line that includes the DL221, DL231 and DL251 Limiter, and the fact sheet describes it as high-end within that family. KMR Audio says the introduction "highlights the beginning of a new generation of dynamic processors which set new standards of sonic excellence." That's marketing language, but it lines up with the DL241 being the debut of the adaptive approach.

The unit was later used as the hardware basis for a software plug-in modeled on both the DL241 and the DL251 Limiter. Beyond that, the documented history is thin. The fact sheet records no production end date and no confirmed explanation of the relationship between the DL241, DL241XLR and the DL241B variant listed by some retailers.

Collectibility & Value

Pricing information for the DL241 comes from a single source and should be treated cautiously. The fact sheet records an original price of C$929.14 and current new prices ranging from $1,049.00 to $1,359.00 USD. Equipboard cites a "best prices from $299.00" figure, undated. Used-market values are otherwise not available in the source material, so treat the $299 number as a floor reference rather than a market rate.

There's also a small aftermarket for modified units. ReviveAudio offers a mail-in service for the DL241 at $329.99 that includes Burr Brown input and output stage modifications, described as giving the unit a fuller, more detailed, three-dimensional sound with increased frequency response. That's a modification, not a restoration.

On reliability, the documented failure mode is specific: in faulty units the expander/gate section may become clicky and noisy while the compressor keeps working. The schematic exists but is not readily accessible, and at least one user has reported difficulty obtaining it. No common failure rates, parts availability or service bulletins are documented in the available material.