Blackstar Unity 250 User Manual

Blackstar Amplification Ltd, Beckett House, 14 Billing Road, Northampton, NN1 5AW, UK
For the latest information go to: www.blackstaramps.com
Whilst the information contained herein is correct at the time of publication, due to our policy of constant improvement
and development, Blackstar Amplification Ltd reserves the right to alter specifications without prior notice.
Designed and Engineered by
Blackstar Amplification UK
152421M-1 03/18
Owner’s Manual
PRO BASS SYSTEM
THE
NEW
FACE
OF
BASS
U250, U500 & U250ACT

Blackstar Unity 250 Specifications

General

Power Output	250W
EQ	3-band
Effects	Chorus
Inputs	Line In
Outputs	XLR

Summary

Important Safety Instructions

General Safety Guidelines

Essential instructions for safe operation, including water proximity, cleaning, ventilation, and power cord handling.

Electrical Hazard Warnings

Warnings regarding electric shock, fire risk, moisture exposure, and proper grounding.

Symbol Explanations

Explanations of warning symbols indicating important instructions and dangerous voltage.

Additional Safety Information

Operational Warnings and Precautions

Further warnings on internal voltages, cleaning, condensation, unauthorized modification, and ventilation.

Noise Exposure and Hearing Protection

OSHA Permissible Noise Limits

Details OSHA noise level exposures and recommends hearing protection for high sound pressure levels.

Introduction

Product Features

Front Panel Controls (U250, U500)

Input and Gain Stage

Covers input jack, clip indicator, pad switch, and gain control for signal input.

Voice and Drive Section

Explains preamp voices (Classic, Modern, Flat) and the drive control for distortion.

Drive Select, Equalisation, and Effects

Details drive types, semi-parametric EQ settings, and effect selection options.

Response and Compressor Settings

Describes the Response control for amp feel and compressor level/select.

Master Volume and Power Indicator

Explains master volume, silent practice, and the multi-function power indicator states.

Rear Panel Connections (U250, U500)

Power, Footswitch, and MP3 Input

Covers power switch, mains input, footswitch socket, and MP3/Line In functionality.

USB Line Out and Audio Streams

Details USB connection for audio capture and its multi-channel output capabilities.

Reamping and Computer Audio Input

Explains the Reamping mode and using computer audio for playback/monitoring.

Audio Outputs and Effects Loop

Covers headphone, line outputs, emulated output, XLR out, and effects loop.

Ground Lift and Effect Level Controls

Details on the ground lift switch and controls for chorus and octave effect levels.

Footcontroller Operation

FS-13 2-way Footswitch

Operation of the supplied FS-13 footswitch for drive and effect control.

FS-12 5-way Footcontroller

Functionality of the optional FS-12 footcontroller for voice, drive, and effect selection.

Footcontroller Configuration

FS-12 + FS-13 Switching

Using the FS-12 and FS-13 together for expanded switching capabilities.

U250ACT Active Cabinet Setup

U250ACT Rear Panel Connections

Details on power, mains input, cabinet link/line input, and ground lift for the active cabinet.

U250ACT Cabinet Operation

U250ACT Volume and Speaker Input

Explains the cabinet volume control and use as a passive speaker cabinet.

Technical Specifications

Unity Pro Bass U250 Specifications

Power, weight, dimensions, and footswitch info for the U250 model.

Unity Pro Bass U500 Specifications

Power, weight, dimensions, and footswitch info for the U500 model.

Unity Pro Bass U250ACT Specifications

Power, weight, and dimensions for the U250ACT Active Cabinet.