Discontinued Model
Downloads and support materials maintained here as a courtesy to owners.

The Newest Effects on the Block

Say hello to the Rumour, one of Kurzweil’s two low-cost effects processors. Based on the award winning KDFX technology found in the KSP8 and K2600, this single space rack unit packs a powerful punch at an affordable price.

The Rumour features a comprehensive set of Kurzweil’s finest reverbs and reverb variations, including gated, reverse, and reverb/compression combinations, along with Kurzweil’s unique LaserVerb(tm), and chorus/flange+delay+reverb combinations.


All specifications subject to change without notice.

Rumour Features

Analog I/O: two balanced/unbalanced 1/4″ TRS jacks, stereo and mono input configurations
Converters: 24 bit, 128x oversampling
Digital I/O: stereo S/PDIF input & output (input can slave to external sync)
Sample Rates: 44.1 kHz, 48 kHz
Bit Depths: 16, 20 and 24 bit (selectable)
ROM Presets: 192
User Locations: 64
Effects Editing: up to 44 editable parameters per preset
EQ: 3 band parametric global EQ

MIDI I/O:In, Out (switchable to Thru)

MIDI Control: up to 16 effects parameters can be controlled/modulated in real-time via MIDI
Meters: 3-LED Input Signal Level Metering / Output Clip LED
Display: 2×20 character LCD w/ front panel contrast knob
Tap Tempo: via front panel button and/or external pedal input
BPM Sync: via MIDI Clock
Bypass: EQ and/or FX Bypass (via front panel button and/or external pedal input)

Rumour Specifications

Height: (1.77″) (4.50 cm) – 1U
Depth: (8.07″) (20.50 cm)
Width: (18.98″) (48.20 cm)
Weight: (5.00 lb.) (2.27 kg)
Power: External 9.5VAC / 2A power supply


MIDI Controllers

What pedals can I use with my Kurzweil instrument?


Switch Pedals

A foot switch pedal from any manufacturer is compatible with our keyboards. Japanese pedals are wired in reverse polarity from American pedals. But all our products check the pedal polarity on power up and reverse themselves if needed, so as long as the pedal is plugged in before you turn on the unit, any pedal will work (be certain to not step on the pedal during power up as this can interfere with the auto-calibration).

In addition, some keyboards use mono jacks for each switch pedal input, whereas other keyboards use a single stereo jack for two pedals.

The PC3 Series, K2 Series, K1 series, PC2 Series, SP2 Series, SP5, PC88, and KME61 use mono jacks for each pedal. The standard single pedal available from Kurzweil is the KP-1.

The SP4, SPS4-8, PC1, SP3X, SP76/88 Series, Rumour/Mangler, Mark ProOneiS, Mark ProTwoiS, RG Series, and Troubador use a single stereo jack for dual pedal units (not sold by Kurzweil). It is still possible to plug a single, mono plug pedal into these units but you will only have access to one of the pedals. If the pedal is plugged in all the way, it will be the Left pedal, and if the plug is pulled out slightly, it will be the right pedal. A stereo (M) to dual-mono (F) “Y” adapter can also be employed to permit the use of two, single pedals.

Continuous Controller Pedals

Our keyboards require a pedal with a TRS 1/4″ connector and 10k linear potentiometer. Most manufacturers EXCEPT Yamaha and Korg make pedals with the same specifications and should work. Yamaha and Korg pedals typically use an exponential potentiometer and therefore will not work correctly. The CC-1 pedal is available from Kurzweil. You can order a pedal through your “local Kurzweil dealer.

CC-1 Wiring Spec

The Control Pedal must be wired to a single stereo (TRS) 1/4″ plug as follows:

  • Wiper to tip connection of 1/4″ plug
  • Top end of resistance element to Ring connection
  • Bottom end of resistance to Sleeve connection



How can I restore my Rumour/Mangler to its factory defaults?


Caution: Hard resetting will erase all user memory ! Need be, back up any custom data via sys-ex before proceeding. (see manual for details)

There are two methods for performing a hard reset on a Rumour/Mangler:

    • Master Menu Method:
      1. start with the power on
      2. press MASTER
      3. turn the “paramter select” knob until “Hard Reset?” is displayed
      4. press [Load]
      5. press [Tap]


  • Boot Loader Method: (useful if your screen is blank and cannot perform the Master menu method)
    1. start with the unit off (i.e., unplug it)
    2. hold down both the LOAD and STORE buttons as you restart your unit (i.e. plug it back in).This will take you straight to the Boot Block.
    3. from there, turn the Select knob 3 clicks clockwise and you will see “Hard Reset?”.
      press [Load] then [Tap] to execute

Via either method, the unit will “initialize” itself and then should reboot to factory specs.


User Manuals

Rumour & Mangler User Guide – 994 KB
Owner’s Manual

Rumour/Mangler Algorithm Reference – 1.5 MB
Supplemental Reference


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