D-Bass Amplifier

A Solid Performer with Surprisingly Powerful Sound

  • FFP
  • COSM

A Solid Performer with Surprisingly Powerful Sound

The Roland D-Bass Amplifiers are the world's first digital bass amps, giving you a wide range of killer tones, programmable memories and incredibly clean, punchy output in the distinct designs. The D-Bass amps combine proprietary Feed Forward Processing (FFP) and COSM amp modeling technology to deliver fat tube and solid-state sounds that can be stored and recalled with the press of a button. The DB-700 is a great all-around amp for medium-to-large club gigs and session work. It employs a 250-watt power amp to drive a 15-inch speaker and a horn tweeter.

  • - Digital bass amplifier with Feed Forward Processing (FFP) Technology for powerful sounding output beyond its 250-watt rating
  • - Employs COSM Amp Modeling technology to recreate the sounds of the best Solid State, Tube and Tube Drive bass amps and natural tube compression effects
  • - Intuitive knob-based operation for a totally analog feel
  • - Amp settings can be stored in program memory for instant recall via footswitch
  • - 2-way configuration with 15" speaker and high-efficiency tweeter
  • - Offers Shape controls and 3-band EQ with semi-parametric midrange
  • - Includes dynamic “D-Chorus” effect

Big Output in A Compact Package

The secret to the D-Bass Amps' high output is Roland's FFP amplifier technology. Using FFP, the compact, digitally controlled D-Bass Amplifiers can precisely predict and adjust the response characteristics of amplifier and speaker output before the bass signal reaches them. The result is a significant increase in efficiency over conventional amplifiers—which feed the output back to the input—allowing the D-Bass Amps to produce a clean, responsive, and surprisingly loud output far beyond their conservative power ratings; just one listen will prove this point beyond any doubt.

COSM Amp Modeling Inside

Improving amplifier efficiency is only half the D-Bass story; these amplifiers also incorporate Roland's COSM technology to deliver a range of exceptional bass tones. Through COSM amp modeling, Roland has recreated the best modern and vintage Solid State, Tube and Tube Drive (Overdriven) amp sounds and natural tube compression effects. Not merely sets of EQ curves, these sonic “models” can mathematically represent all the unique characteristics of the amp chosen. Thanks to COSM, there's never been a more flexible bass combo amp.

Analog-Style Control

Though their functions are actually quite sophisticated, D-Bass Amplifiers’ knob-based controls make dialing in just the right tone simple and intuitive. A three-band EQ section offers separate Bass and Treble adjustment, plus parametric midrange with Frequency and Level controls. A split-frequency, dynamics-sensitive “D-Chorus” effect applies rich chorusing to upper frequencies without muddying the all-important low end. And when you’ve created the sound you’re after, simply store your front panel settings into A and B program memories for instant recall via footswitch.

Built to Last

The D-Bass Amplifiers are crafted with premium components for years of rugged reliability. Recessed side handles and heavy-duty casters make them perfect for the road. A high-quality DI connector (XLR-type) is included for direct connection to PA systems or recording equipment, while additional XLR and 1/4” line outs—plus a dedicated insert jack and headphone jack—are perfect for PA systems, recording or practice.

Rated Power Output
250 W
15” (38 cm) x 1, Horn Tweeter x 1
A, B (2 memories)
Input (High, Low), Headphone, Balanced DI, Insert (Send, Return), Line Out (XLR, balanced, 1/4” TRS Phone, balanced), Foot Switch (TIP: A/B, Ring: Manual, Chorus)
Power Consumption
200 W (AC 117/230/240 V)
Casters x 4
Foot Switch FS-5L (BOSS)

Size and Weight (Incl. casters)

Width (W)
578 mm22-13/16 inches
Depth (D)
407 mm16-1/16 inches
Height (H)
598 mm23-9/16 inches
34 kg75 lbs.

All specifications and appearances are subject to change.


To the top of page