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Page 8 

MJ Acoustics Pro 50Mk2 User’s Manual 

SPECIFICATIONS 

120watt rms, DC-coupled MOSFET Amplifier * Speaker and line level inputs 
with Gain Control Range 80dB * Neutrik Speakon connectors (Gas Tight) 
(High level 100k ohm) *  Unbalanced RCA (phono) connector (Gold Plated) 
(Low level 10k ohm) * Twin Sophisticated crossover circuits - variable 
increments between 20Hz and 120Hz with LFE By-pass @ 200Hz * Phase 
Control  infinitely adjustable between 0º and 180º * Frequency response 13hz 
to 200hz * 

I.S.P. 

(Intelligent Speaker Protection) * Specially designed cabinet 

structure, volume, and configuration made from inert 18mm MDF * Power 
LED and switched fused IEC mains input socket * 250mm (10”) Ultra Long-
throw Driver with  heavy duty chassis and  double magnet * 1 year 
manufacturers return to base warranty * Dimensions (WxHxD) 278mm  X 
332mm X 278mm * Weight  11.50kg (25.3 lbs) * Black Satin finish as 
standard.  

Specifications subject to change without notice. All rights reserved. E & O E. 

Owner’s Name:…………………………………………...…………………………… 
Address:………………………………………………………………………………..
…………………………………………………………………………………………. 
…………………………………………………………………………………………. 
Date of purchase:…………………………….Serial number:………………………… 

MJ ACOUSTICS  warrants to the original purchaser only, that this product is free from defects in material and 
workmanship under normal use within one year from date of purchase, in the United Kingdom only, extended to 2 years 
provided registration is submitted to M J Acoustics within 28 days from date of purchase. All parts, except the external 
cabinet finish are warranted as stated from date of purchase.  Under this warranty M J Acoustics agrees to repair any 
defect or at the company’s discretion, replace the faulty component(s) without charge for parts and labour provided the 
unit is returned carriage paid both ways.  Defective parts will be replaced if in the sole judgement of MJ ACOUSTICS 
they be deemed defective over and above that considered to be normal wear and tear. 
 
This warranty does not apply to equipment showing abuse, misuse, neglect or damage or to parts that in the judgement of 
MJ ACOUSTICS are not defective or have been used for purposes outside the scope of its design , nor does it extend to 
any equipment which may have been tampered with, altered or repaired outside an authorised MJ ACOUSTICS service 
station, and on which the serial number has been defaced, modified or removed. This warranty is in lieu of any other 
warranty expressed or implied and there is no other warranty or warranties valid for your purchase. No one is authorised 
to assume any liability on behalf of MJ ACOUSTICS or impose any obligation on it in connection with the sale of any 
equipment other than as stated in this warranty and outlined above. 
 
MJ ACOUSTICS’s liability, for any defective product, is limited to repair or replacement of the product, at our sole 
option. MJ ACOUSTICS shall not be liable or responsible, under any circumstances, for such indirect or consequential 
damages as from interrupted operations or other causes howsoever related.  Additionally  the Pro 50 is not intended for 
use in a commercial environment and the warranty  applies for domestic use only. 
 
If your unit requires service it should be sent to MJ ACOUSTICS service department, any shipping charges are the 
responsibility of the owner, this includes return shipping charges. SERVICE DEPARTMENT:-  MJ Acoustics, Service 
Department, 9 Venture Court, Boleness Road, WISBECH, Cambridgeshire. PE13 2XQ 

WARRANTY 

10/10/2006 (Pro – 50Mk2) 

Page 1 

User’s Manual 

Model

 

PRO 50Mk2

 

Table of Contents 

Safety Instructions  …………………..  page 2 
Precautions  

………………….. page 

Introduction   

…………………..  page 3 & 4 

Controls 

 

…………………..  page 4 & 5 

Features 

 

…………………..  page 5 & 6 

Connectivity  

…………………..  page 6 

Panel Layout   

…………………..  page 7 

Set-up Hints & Tips  …………………..  page 7 
Specifications ……………..…… 

page 

Warranty         

…………………..  page 8 

Natural Bass Impact Unparalleled in the Entertainment Environment

 

 

10/10/2006 (Pro – 50Mk2) 

Sub

Professional 

Woofer 

for Home Cinema, Audiophile Specialists & Studios

Summary of Contents for PRO 50Mk2

Page 1: ...al wear and tear This warranty does not apply to equipment showing abuse misuse neglect or damage or to parts that in the judgement of MJ ACOUSTICS are not defective or have been used for purposes outside the scope of its design nor does it extend to any equipment which may have been tampered with altered or repaired outside an authorised MJ ACOUSTICS service station and on which the serial number...

Page 2: ... appliance or C The appliance has been exposed to rain or D The appliance does not appear to operate normally or exhibits a marked change in performance or E The appliance has been dropped or the enclosure damaged 17 Servicing The user should not attempt to service the appliance All servicing should be referred to qualified service personnel CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN Caution To Re...

Page 3: ...ll not work correctly and may cause your Digital or BTL Power Amplifier to enter protection mode if this interface box is not used Page 3 Location Avoid using the Pro 50Mk2 in the following locations Locations of extreme low or high temperatures or extreme changes in temperature Sources of heat such as near commercial heaters fires or other sources of heat Unstable locations or where the unit can ...

Page 4: ...o provide the required headroom for developing the sub bass registers A Double Insulated Toroidal transformer is fitted which has been designed specifically for this audio application The rectifier used is a bridge configuration utilising high quality fast recovery diodes an example of how over engineered this amplifier is and substantiates why when deep transients are required the amplifier has e...

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