MANLEY Stereo ELOP+ Limiter

Product overview

The MANLEY ELOP®+ is a stereo all-tube electro-optical limiter and compressor: a comprehensive re-engineering of the ELOP® Limiter with added versatility and performance.

Hand-built in California, the ELOP+ uses light-dependent (optical) resistor technology with vacuum tube amplification throughout the signal path to deliver musical, transparent and dynamic control in tracking and mixing sessions. A switchable 3:1 compression ratio joins the classic 10:1 limiting mode, and a side-chain high-pass filter stops low frequencies from pumping. It is a simple box offering great results easily.

Key features

• All-tube, Class A audio path: a 5751 for gain and a 6922 White follower output per channel
• Electro-optical gain reduction with a passive light-dependent resistor
• 10:1 limiter and 3:1 compressor ratios
• Side-chain high-pass filter at 80 Hz (150 Hz by internal jumper)
• MANLEY IRON® transformer-coupled balanced XLR inputs; impedance-balanced XLR outputs
• Large illuminated VU meters reading gain reduction or output
• Stereo link, bypass switches and AUTOMUTE with warm-up delay
• Silent conductive-plastic gain control
• MANLEY Power® universal internal supply, 90-254 V AC

Musical gain reduction through optical compression

The ELOP+ uses electro-optical gain reduction: a light-dependent resistor works as a voltage-controlled attenuator in the audio path. This topology achieves smooth, artefact-free compression without the complex harmonic products of other gain-reduction methods. Its inherent attack and release characteristics produce musical dynamic control that integrates naturally, even into busy arrangements.

Enhanced functionality with dual-ratio operation

Building on the original design, the ELOP+ adds a switchable 3:1 compression ratio alongside the classic 10:1 limiting mode, for mix bus processing and gentle dynamic shaping. The side-chain high-pass filter allows frequency-selective triggering, so a kick drum or bass line does not trigger unnecessary gain reduction and the low end stays tight.

California craftsmanship with a premium tube complement

Each ELOP+ is hand-assembled at MANLEY's California facility with 5751 and 6922 dual triodes throughout the signal path, hand-tested and calibrated by MANLEY. Housed in a precision CNC-milled chassis, it combines a proven electro-optical topology with modern construction standards for reliable performance and sonic consistency.

In the box

• MANLEY Stereo ELOP+ Limiter

MANLEY Stereo ELOP+ Limiter: frequently asked questions

What makes the ELOP+ special among optical compressors?

Its fully Class A, all-tube signal path from input to output. A passive light-dependent resistor provides smooth, transparent gain reduction with very few active components, for clean, effortless dynamic control.

What is the COMP mode for?

The gentle 3:1 ratio gives subtler, more transparent gain reduction: glue and consistency on a full mix or sub-group, such as drum or vocal buses, raising average loudness and density while preserving natural dynamics and transient detail.

What are the main applications?

Tracking and mixing: vocals, acoustic guitars and bass on individual tracks, and the stereo mix bus or sub-groups in COMP mode. It is also a fine mastering tool, with the side-chain filter keeping a punchy low end.

Is the bypass a hardwire bypass?

No. In bypass the signal still passes through the all-tube audio path and only the limiter is bypassed.

Where can I buy the MANLEY Stereo ELOP+ Limiter in India?

The MANLEY Stereo ELOP+ Limiter is available from Shivansh Electronics, Kolkata, West Bengal, India, with delivery across India.

Workflow 1: Vocal levelling while tracking

Smooth, musical control of a vocal on the way in.

Connections

Setup

1. Set GAIN to 1 o'clock for unity.
2. Select LIMIT (10:1).
3. Raise REDUCTION while watching the meter.
4. Trim GAIN for the output level.

Tip: Switch the meter to O/P to check the output level.

Workflow 2: Mix bus glue

Gentle compression on a stereo mix.

Connections

Setup

1. Engage LINK.
2. Select COMP (3:1) on both channels.
3. Aim for a few dB of gain reduction.
4. Engage HP SC to stop bass pumping.

Tip: Maximum compression with a +4 dBu signal is 6 dB.

Workflow 3: Bass guitar

Even level for a bass track.

Connections

Setup

1. Select LIMIT.
2. Set REDUCTION for steady level.
3. Leave HP SC at FLAT so the low end controls the limiter.
4. Adjust GAIN.

Tip: The optical release integrates naturally with busy parts.

Workflow 4: Drum bus

Density on a stereo drum bus without losing transients.

Connections

Setup

1. Engage LINK and COMP.
2. Engage HP SC so the kick does not over-trigger.
3. Set REDUCTION.
4. Match the bypassed level with GAIN.

Tip: The side-chain filter is 80 Hz, or 150 Hz by internal jumper.

Workflow 5: Mastering

Subtle glue on a stereo master.

Connections

Setup

1. Engage LINK and COMP.
2. Engage HP SC to keep the low end punchy.
3. Use only a little reduction.
4. Compare with BYPASS.

Tip: Bypass still runs through the all-tube path.

Workflow 6: Two independent mono channels

Two different sources processed separately.

Connections

Setup

1. Set LINK to STEREO off (unlinked).
2. Choose COMP or LIMIT per channel.
3. Set REDUCTION and GAIN per channel.
4. Record both.

Tip: Each channel has its own meter and switches.