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technical data

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technical data

frequency response

0.1 Hz - 130 kHz (-3 dB)
0.35 Hz - 50 kHz (-0.4 dB)
1 Hz - 20 kHz (+/- 0.05 dB)

total harmonic 

less than 0.002% @ 1 kHz 250 W into 8 Ohms

dist noise

less than 0.01% from 20 Hz to 10 kHz @ 250 W into 8 Ohms
less than 0.05% from 20 Hz to 20 kHz @ 250 W into 8 Ohms

polarity (phase)

non-inverting between any input and output

operating 

10 - 35°C

temperature range

ac supply frequency

50 - 60 Hz, depending on country

ac supply voltage

100 V, 110 - 120 V or 220 - 240 V
the voltage is marked on the rear of the product

power consumption

approx. 650 W, standby less than 10 W

dimensions 

215 mm wide

(including feet,

152 mm high

terminals and controls)

352 mm deep

We reserve the right to alter design and specification without notice.
Specification may vary for different countries.

This section is for those of you who really want to know the ‘insides’ of your 250MR. You will not
miss out on any of the functions or performance of your 250MR if you choose not to read any
further.

rated power output

250 W into rated load impedance (8 Ohms)

IHF toneburst

300W into 8 Ohms
550W into 4 Ohms
1000W into 2 Ohms
(20 ms full on, 480 ms at -20 dB repeated indefinitely)

input for full rated

1.65 V rms

power (RC

A

or XLR)

input impedance

line input RCA: 10 kOhms nominal
balanced input XLR: 25 kOhms (10 kOhms) 
nominal on hot (cold) input pins

gain

28.8 dB at 1 kHz

balanced input 

Better than 40 dB at 1 kHz

common-mode rejection

signal to noise

greater than 90 dB (relative to 0 dBW) unweighted

GRR00794.03-UK 250MR  5/4/02  11:50 am  Page 30

Summary of Contents for 250MR

Page 1: ... welcome 06 introduction 07 construction 08 amplifier module 15 set up 20 operation 21 remote control 24 TAGtronic Communications Bus 25 running in and warming up 12 01 owner s manual GRR00794 03 UK 250MR 5 4 02 11 48 am Page 01 ...

Page 2: ...nobloc 250MR s OUT IN B U S LINE INPUT LOUDSPEAKER OUTPUT C A U T I O N RISK OF ELECTRIC SHOCK RISK OF ELECTRIC SHOCK DO NOT OPEN DO NOT OPEN Double insulated When servicing use only identical replacement parts BALANCED INPUT ground 2 1 3 line level input socket TAGtronic communications bus loudspeaker terminals ac supply socket and fuse carrier balanced input socket Specification shown may vary f...

Page 3: ...lopment team are highly experienced engineers whose heritage of award winning hi fi and world beating electronic control systems is envied by many and equalled by few There are many immediate spin offs into audio from our expertise in automotive electronics mechanical engineering and the material science of Formula One motor racing multi layer printed circuits fast digital signal processing electr...

Page 4: ...via the TAGtronic Communication Bus The protection control circuitry monitors the performance of the amplifier in order to power it down should a fault occur A monobloc also known as single channel amplifier is the ultimate power amplifier configuration eliminating channel crosstalk and if placed close to a loudspeaker the influence of the loudspeaker cable Thank you for purchasing theTAG McLaren ...

Page 5: ...lying on high global negative feedback which can present difficulties when handling rapidly changing signals The amplifier implements at each amplifying stage a controlled amount of local feedback which not only linearises but also defines the gain and other vital parameters closely cascode compensation The 250MR uses an advanced stabilisation concept called Cascode Compensation This might be the ...

Page 6: ...ocessors and their power amplifiers It works extremely well even over long distances if the output stages of the av processor preamplifier are of a low impedance configuration such as those in the TAG McLaren AV32R or DPA32R However if several products are connected together it is possible for a current to flow between the ground connections of those units caused by electro magnetic input interfer...

Page 7: ...per an unacceptable excuse for TAG McLaren The knobs for the 250MR have been manufactured from non conductive Pocan without a metal insert as it was found that this gave the best sonic result identical to that obtained using an OFHC knob 1 as used on the TAG McLaren 100x5R 1 safety regulations do not allow the use of a OFHC knob due to the very high voltage the 250MR can achieve at its loudspeaker...

Page 8: ...he components of your system are disconnected from the AC supply whenever you change any connection If the unit is not to be used for some time withdraw the mains plug from the wall socket outlet positioning The 250MR is capable of consuming over 650 Watts of electrical power during demanding presentations This results in significant heat being dissipated 1 Throughout this instruction manual bold ...

Page 9: ...McLaren Audio F3 10 SPK Ensure that the amplifier mains plug has been removed from the wall socket before connecting the red terminal of the loudspeaker to the red terminal on the rear panel of the 250MR In turn connect the black terminal of the loudspeaker to the black terminal on the 250MR When making the connection ensure that the spade terminal is correctly located and the loudspeaker terminal...

Page 10: ...o not connect both connections at the same time as this might damage your equipment When the RCA input is used the XLR shorting link fitted when you receive the 250MR from the factory must be inserted between pin 1 and pin 3 of the XLR input connector This is necessary to obtain the correct gain and to reduce the noise pickup If you connect an RCA output of your av processor or preamplifier with t...

Page 11: ...l base features 1 the remote of the 250MR is identical to that of the 250x3R and 100x5R ensuring that both these amplifiers can be controlled with the same remote 2 If the AV32R is connected to the 250MR then the AV32R can do this for you Details can be found in the AV32R user manual amp dvd av all 1 channel 2 3 4 pla y pause volu me mute amp sto p 5 S T A N D B Y A V A V D V D input For added con...

Page 12: ...nked via the TAGtronic Bus for details see the AV32R user manual The 250MR remote control allows the convenient control of the major functions of the TAG McLaren Audio av processor AV32R and the dvd player DVD32R extended operation AV32R Two major functions of the AV32R can be controlled volume Pressing the and buttons adjacent to the volume label will increase or decrease the volume of the sound ...

Page 13: ...0MR is that the micro controller software is stored in re programmable FLASH memory The FLASH can be re programmed with updated software using a PC suitably connected via the TAGtronic Communications Bus Details of future upgrades will be published on TAG McLaren s website www tagmclaren com running in Just like a high quality car the performance of your 250MR will improve during the first hours o...

Page 14: ...other solutions Do not use water or any solvents or abrasives take great care not to get any liquid inside the case If this happens you should have your 250MR serviced fuses service cleaning The only routine service you should do to your 250MR is described on the previous page All other servicing should only be carried out by one of our authorised service agents If service is required please conta...

Page 15: ...three pins on an XLR connector Standard practice is for Pin 1 to be Ground Pin 2 to be the hot or in phase connection and Pin 3 to be the cold or phase reversed connection A major advantage of balanced interconnects is the complete suppression of ground loop problems If a ground loop is present then mains frequency currents can flow down the ground of the interconnect between a sending unit and a ...

Page 16: ...ls 352 mm deep We reserve the right to alter design and specification without notice Specification may vary for different countries This section is for those of you who really want to know the insides of your 250MR You will not miss out on any of the functions or performance of your 250MR if you choose not to read any further rated power output 250 W into rated load impedance 8 Ohms IHF toneburst ...

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