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Electric Guitar AmpsElectric Guitar Amps

Randall USA RM4 MTS Guitar Rack Preamp Chassis

Guitar preamp chassis
Unfortunately, the Randall USA MTS system has been discontinued for business policy reasons (incl. patent royalties) and replaced by new non-modular products. This is the last opportunity to purchase a new RM4 mainframe. MTS modules can also be purchased here: We have most of them still on offer, but meanwhile, in very low quantities. Please make sure to order soon if interested!

This 4-channel preamp gives all the flexibility of any digital modeling amp, but does it with all-tube circuitry, based on the original circuit specifications. The RM4 allows you to hot swap, and customize any combination of authentic tube tones of the MTS module range.

- Four independent channels (with your choice of vintage to modern voiced preamps)
- Parallel effects loops with front panel mixcontrol
- Series effects loop
- MIDI in / thru
- Pre and post loop outputs
- Two 12AX7‘s buffer the effects loop
- Four button MIDI selectable footswitch
- Front & rear panel inputs

MTS modules are not included!

Additional information
  • Name
    Randall USA RM4 MTS Guitar Rack Preamp Chassis
  • Product type
    Guitar preamp
  • Manufacturer
    Randall
  • Condition
    new
  • MPN
    RM4-chassis
  • Model
    MTS
Shipping and Warranty

    We ship worldwide on daily basis, with DHL, DPD, FedEx and freight carrier. All in-stock items are usually shipped within 24h upon receipt of payment, mostly on the same working day. Of course, all orders are checked by our qualified personnel and professionally packaged for shipping. Express delivery options are available upon request.

    We stand behind the flawless quality and function of our products and provide you an extended warranty of 3 years for regular brand new items, as well as 2 years for B-stock or demo items and 1 year for second hand equipment.

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