dbx DBX286SV Instrument
- 4 processors: compressor, de-esser, enhancer, expander/gate
- XLR mic input, plus 1/4 inch TRS line input
- +48V phantom power
- Insert jack for an external processor
- 1U rack mount, 1.75 by 5.75 by 19 inches
- 2.3 kg, silver
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A single-channel strip with a mic preamp and four processors for vocals and instruments. Only a quick start guide is listed, and the warranty applies only to authorized US sellers.
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ASIN: B004LWH79AModel: DBX286SVCategory: Preamps
Overview
Not a bare gain stage, this strip puts a mic preamp, classic dbx compression, a tunable de-esser, an enhancer and an expander or gate into one rack space. Metering LEDs show levels, and an insert jack takes outboard gear.
Choose it to replace a patchwork of single-purpose processors with a short signal path. The limit is channel count: it is one channel only, and the listing includes no cables or rack ears.
Who it's for
A home or project studio tracking vocals, guitar or bass through one chain gets all the processing in one box. Skip it if you need multiple channels in a session.
Pros and cons
- Four processors in one
- Single channel only
- Box contents limited
- Warranty limited to authorized sellers
- Voltage entry is unclear
Performance notes
The processors can be used alone or together. The de-esser tames sibilance by frequency, the enhancer adds high and low detail, and the expander or gate reduces headphone leakage or noisy amps. A short path between stages limits added noise.
Where it stands among preamps
- #2 most-searched brand and model of the 23 preamps lines we track (by search demand, not sales).
From the specs of the 14 preamps we list; not a test result.
Specifications
| Brand | dbx |
|---|---|
| Model | DBX286SV |
| Dimensions & fit | |
| Rack size | 1U |
| Item dimensions | 1.75" x 5.75" x 19" |
| Item weight | 2.3 kg |
| Capacity & performance | |
| Output connector type | TRS |
| Power & efficiency | |
| Power source | Corded Electric |
| Included components | |
| Included components | Quick Start Guide |
| Warranty & support | |
| Warranty description | Sold by authorized dealer, manufacturer warranty valid within the United States |
| Other details | |
| Number of channels | 1 |
| Audio input | XLR |
Frequently asked questions
Does the dbx 286s have phantom power?
Yes. The description names +48V phantom power.
Can it connect an external processor?
Yes. The insert jack allows an external processor to be added.