Skip to content
Everything In Music Since 1958
Everything In Music Since 1958

Solid State Logic BUS+ Bus Compressor - Preorder

Original price $3,479.99
Original price $3,479.99 - Original price $3,479.99
Original price $3,479.99
Current price $2,899.99
$2,899.99 - $2,899.99
Current price $2,899.99
📆 PREORDER - reserve it now - risk free
About Inventory Status

Call or text us at 301-946-8808.

In stock: It is in stock and available to ship or pickup. Apparel must be shipped from another location and is not available for in-store pickup. We can usually ship or have these items available for pickup by the next business day if they don't require inspection, special handling, or setup. Our pickup location is 11151 Veirs Mill Rd. Silver Spring, MD 20902.

📆 Preorder: It is on the way to our warehouse. We can't predict when preorder items will arrive due to current supply chain issues. If you place an order for one of these items someone will contact you to estimate the delivery date.

Out of stock: We don't currently have it available but you're not out of luck yet. We still may be able to get it. If you order one of these items we will contact you with an estimated fulfillment date. You have the option to cancel the order if you change your mind.

Special order: The item is so special that it needs to be custom ordered for you. Some of these items are works of art and have to be made individually. Orders for special order items must be prepaid and we cannot accept cancellations or refunds.

█ Sold out: We don't think we can get this item because it was either discontinued by the manufacturer or was limited in quantity. If you want or need this item call or text us. Sometimes we can help you track down the item through other sources or help you find something similar.

About Item Conditions

Call or text us at 301-946-8808.

New: The item is brand new as received from the manufacturer with a full manufacturer warranty. Instruments such as guitars, snare drums, drum kits, brass and woodwind instruments may be opened for photography and quality control inspection and may not be in a factory sealed box.

Mint or Open Box: The item may have been opened and tested but has been repackaged. The original packaging may have superficial issues but the item itself and any originally included accessories are in perfect, like new condition.

Display Model: These items are so cool that we put them on display in our legendary shop. The condition is brand new as received from the manufacturer with manufacturer warranty. Rest assured, these items undergo a very careful inspection before shipping.

Demo: These items have been on our sales floor for demo purposes and will likely show signs of use. The original packaging may no longer be included, but you can be assured that you are receiving an awesome item and an awesome price.

Used: The item is used. These item may have varying degrees of wear. Please read the description for information about the condition of the item. Used items do not carry a warranty.

B or C Stock: Factory refurbished. These items were purchased from the manufacturer in a refurbished condition. They will show some cosmetic issues, but nothing that would impact performance. Being that these are sealed from the manufacturer, we generally do not open these to photograph the cosmetic issues. They are guaranteed to work and may have a limited warranty or you may purchase an extended warranty in some cases. Please see the listing description for item specific information.

Educational & Government Sales Quotes

Click here to inquire about an educational or government quote and discover more about our Educational & Government Sales Division.

An Updated Legend - The Solid State Logic BUS+ Bus Compressor

Whilst the core design of THE BUS+ remains faithful to the original, a number of advanced processing tools have been added to create the most versatile Bus Compressor ever. In addition to D-EQ and Transient Expander, THE BUS+ features three unique compression colors: LOW THD, F/B and 4K MODE. Each ‘color’ offers a different characteristic and can be combined for very unique compression styles.


  • 100% analogue circuit, controlled digitally using stepped front-panel pots
  • Huge +27.5 dBu headroom
  • Configurable processing order - Bus Compressor pre D-EQ (default) or post
  • CH 1 IN and CH 2 IN buttons for global bypass
  • Settable Operating Level - 0 dB (nominal), +10 dB, -5 dB
  • Sleep and Auto-Sleep modes
  • Precision MDAC-controlled MAKE-UP Gain with two ranges - 1 dB or 0.5 dB steps

Bus Compressor

  • Four modes of operation - Classic Stereo, Σ S/C Stereo, Dual Mono or Mid-Side
  • External side-chain inputs and sends
  • The authentic SSL Bus Compressor circuit
  • LOW THD Mode reduces low-frequency distortion caused by compression
  • F/B Mode alters the compression characteristics for a more 'relaxed' style of compression
  • 4K Mode - single VCA operation with variable harmonic distortion to bring some 'grit' and 'grunge' to the mix
  • Negative Ratios - for creative pumping effects and control of particularly loud signals
  • New Attack and Release options, including the new 'Auto 2' setting
  • MIX control for instant parallel compression
  • Moving-coil gain reduction meters
  • Unlockable Transient Expander


  • Powerful 2-band analogue Parallel Dynamic EQ - the D-EQ
  • Compress/Expand modes
  • Three choices of time constants for each band - Nominal, FAST or AUTO
  • 16 selectable Frequency points per band
  • Adjustable Range control per band from 0.5 dB to 15 dB
  • HF band can be switched to Bell shape, with selectable frequencies covering High-Mids and Highs
  • Frequency band static 'make-up' gain for LF and HF bands (Stereo/ Σ S/C Stereo) or LF band (Dual Mono/Mid-Side)
  • G-Series mode changes LF filter to be 2nd order with degree of undershoot/overshoot
  • Tri-color activity LEDs to indicate D-EQ activity
  • Individually bypass-able bands



  • Power Supply: Auto-Ranging 100-240 VAC
  • Operating Power: 38 Watts
  • Sleep Power: < 1 Watt
  • Auto-Sleep Power: 10 Watts
  • Width: 480 mm / 19 inches
  • Height: 88.9 mm / 3.5 inches (2 RU)
  • Depth: 303 mm / 11.9 inches (chassis only), 328 mm / 12.9 inches (total including front panel controls)
  • Weight: 5.92 kg / 13.1 lbs
  • Boxed Dimensions: 550 mm x 470 mm x 225 mm (21.7 x 18.5 x 8.9 inches)
  • Boxed Weight: 8.68 kg / 19.14 lbs
  • Inputs Female: XLR x2
  • External Inputs: Female XLR x2
  • Outputs Male: XLR x2
  • External Sends Male: XLR x2

Audio Performance

  • Input Impedance: 10 kΩ
  • Output Impedance: 60 Ω
  • Maximum Input and Output Level: +27.5 dBu operating Level Modes 0 dB/-5 dB, 1% THD
  • Frequency Response:
    • ±0.025 dB bypassed, 20 Hz to 20 kHz
    • < 1 Hz bypassed, -3 dB low cut-off
    • > 200 kHz bypassed, -3 dB high cut-off
    • ±0.01 dB compressor in, 20 Hz to 20 kHz
    • < 2 Hz compressor in, -3 dB low cut-off
    • > 180 kHz compressor in, -3 dB high cut-off
  • THD+N:
    • -95 dB / 0.0017% typical bypassed, 1 kHz @ 0 dBu
    • -106 dB / 0.0004% typical bypassed, 1 kHz @ +20 dBu
    • -88 dB / 0.004% typical compressor in, 1 kHz @ 0 dBu
    • Noise:
    • -95 dBu typical bypassed
    • -90 dBu typical compressor in
    • -89 dBu typical 4K mode in (any intensity)
  • Dynamic Range
    • 122.5 dB bypassed
    • 117.5 dB compressor in
  • Crosstalk:
    • < -118 dB bypassed, 20 Hz @ +24 dBu
    • < -110 dB bypassed, 1 kHz @ +24 dBu
    • < -90 dB bypassed, 10 kHz @ +24 dBu
  • Make-Up Gain Precision: < 0.003 dB - 10 dB to + 20 dB
  • Stereo Matching:
    • < 0.05 dB bypassed
    • < 0.02 dB in, 1 kHz @ 0 dBu
    • < 0.1 dB sual Mono, any setting gain reduction <8 dB
  • Frequency Response (20 Hz - 20 kHz:
    • ±0.05 dB LF in, 20 Hz to 20 kHz
    • < 2 Hz LF in, -3 dB low cut-off
    • > 200 kHz LF in, -3 dB high cut-off
    • ±0.05 dB HF in, 20 Hz to 20 kHz
    • < 2 Hz HF in, -3 dB low cut-off
    • > 200 kHz HF in, -3 dB high cut-off
  • THD+N:
    • -88 dB / 0.004% typical LF in, 40 Hz @ dBu
    • -81 dB / 0.008% typical HF in, 10 kHz @ 0 dBu, 40 kHz BW
  • Headroom: > 27 dB LF in, Hf in
  • Noise:
  • -90 dBu typical LF in
  • -87 dBu typical HF in
  • LF Gain Accuracy: ±0.05 dB typical LF in, 40 Hz @ 0 dBu: -10 dB to + 10 dB
  • HF Gain Accuracy: ±0.05 dB typical HF in, 10 kHz @ 0 dBu: -10 dB to + 10 dB
  • Stereo Matching:
    • < 0.05 dB LF/HF in, 20 Hz to 20 kHz @ 0 dBu
    • < 0.1 dB LF in, 40 Hz, any gain change
    • < 0.1 dB HF in, 10 kHz, any gain change

Manufacturer: Solid State Logic
Model: THE BUS+
SKU: I708589-N-1-WHXA
UPC: 878076001517

We are Chuck Levin's Washington Music Center

Maryland, Virginia, and Washington DC's legendary music shop. Family-owned and operated since 1958. Buy gear the way it was meant to be bought, from a store that's been there through it all and has the vibe to prove it. We're staffed with musicians and industry experts, people that live and breathe music gear. Our mission is to help you find the right gear for your project, that thing that will bring you the most joy out of what you do. We're an authorized dealer for almost every brand, we stock items the other stores don't, so you can try before you buy. Stop by our Wheaton, MD showroom and see for yourself.

Contact us if you have questions about one of our listings or if you need help finding the right piece of gear.

Free Shipping

Offered for thousands of items when you spend $100+


+1 (301) 946-8808

Get A Quote

Get an educational or government quote

Easy Returns

Learn about returns.