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TAG MCLAREN AUDIO PPA20, Руководство пользователя

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TAG MCLAREN AUDIO PPA20 Скачать руководство пользователя страница 10

The frequency response of the PPA20 has been tailored to fit
precisely the requirements of the RIAA specification.The PPA20
also includes a filter which meets the requirements of the IEC

(1)

extension to the RIAA specification, cutting out low (bass)
frequencies to prevent ‘rumble’. To further enhance your
enjoyment of older recordings, which may be damaged or were
recorded using non-standard methods, the PPA20 also has a
bandpass filter and the capability to be switched to mono.

Use the IEC filter if you hear low-frequency ‘rumbling’ noises that
you might get, for example, from a warped record.

Press the filter selector button marked 

riaa/iec

on the front panel

to switch from 

riaa

to 

riaa/iec

and back. The status of the filter is

shown by an LED on the front panel labelled 

riaa

or 

riaa/iec

.

The 

riaa

LED indicates that the PPA20 is meeting the RIAA

specification while the 

riaa/iec

LED indicates that the IEC 

low-frequency filter is switched on as well.

The bandpass filter

(2)

cuts down both high- and low-frequency

noise and is useful for listening to older records. In particular, the
bandpass filter can be used to remove the high-frequency carrier
signal from old quadraphonic recordings.

You can use the bandpass filter and the low-frequency (IEC) filter
at the same time to enhance the rejection of low frequencies.

When you listen to mono recordings you should select the 

mono

setting. This setting will also enable you to listen to certain types
of non-standard stereo recordings, albeit in mono

(3)

.

The 

mono

setting only works when the bandpass filter is on.

bandpass filter

mono

low-frequency

(IEC) filter

18

19

filter and mono settings

filter and mono settings

1. International Electrotechnical Commission

2. A bandpass filter passes a band of frequencies and cuts out frequencies above

and below the band. The bandpass filter in the PPA20 allows through
frequencies between 40 Hz and 20 kHz

3. You can use the 

mono

setting to check the wiring of your cartridge. Play a stereo

record. If the sound drops to a very low level when you switch to mono, then it is
most likely that the phasing of your stereo channel connections is wrong

riaa/iec

riaa

riaa/iec

GRA00046.1-[CA]PPA20  13/03/01  11:31  Page 19

Содержание PPA20

Страница 1: ...lanced option transformer balanced option transformer balanced option transformer balanced option fuse carrier output level button phono input sockets XLR output optional ac supply socket output sockets ground terminals PPA 1234567 0 2 welcome 0 8 key features 1 0 getting started 1 2 inputs 1 4 selecting the cartridge type 1 7 muting 1 8 filter and mono settings 2 1 grounding 2 3 outputs 2 5 speci...

Страница 2: ...nal excellence and sheer listening pleasure celebrating a TAG McLaren victory All TAG companies perpetually strive for and achieve excellence and high performance in every area of their business These qualities are demonstrated in the fastidious standards that makeTAG Heuer watches some of the world s most admired in the teamwork that makesTAG McLaren s motor racing team one of the most successful...

Страница 3: ...rting from well below the audible range and extending far above the capabilities of human hearing Although sound outside the human hearing range of approximately 20 to 20 000 Hz cannot be heard it can significantly affect the quality of music reproduction through welcome welcome 05 04 Thank you for purchasing theTAG McLaren Audio phono preamplifier PPA20 an effect that audio engineers call intermo...

Страница 4: ...es the characteristics of the preamplifier during input switching to reduce the settling time so that the mute period can be as short as possible versatile input loading The inputs of the PPA20 have the correct loading for moving magnet and moving coil cartridges Each input includes special load terminals which allow you to tailor the input to match any cartridge which may need special non standar...

Страница 5: ...idge type low frequency IEC filter bandpass filter and mono Dedicated sockets for special cartridge loading Two low impedance analogue stereo outputs to allow long cable runs Switchable 20 dB output attenuator An additional transformer coupled and balanced output via the fitted XLR connectors can be supplied as an option Precision metal film resistors Sorbothane sonic isolation feet specially desi...

Страница 6: ...outlet For the best sound quality we recommend that you do not use multi plug adaptors Press the power button in The blue power LED will come on Start playing a record on your turntable Turn up the volume sit back and enjoy the music 5 power connection switch on 10 11 getting started getting started 1 Throughout this instruction manual except in titles bold print indicates the lettering that you w...

Страница 7: ...table to the left and right signal sockets The load sockets are used to apply special input loading as described on page 25 The use of the ground terminal is described on page 21 The PHONO 1 and 2 inputs including the ground terminals and the signal grounds are electrically isolated from each other This means that two turntables may be connected to the PPA20 without interfering with each other The...

Страница 8: ...as a gain of 30 times the gain on mm and is most suitable for low output cartridges The cartridge selector button mc mm allows you to select the cartridge type and gain The cartridge type and gain setting you have selected is shown by an LED on the front panel marked mc x 30 mc x 10 or mm Pressing the mc mm button steps through the following sequence mc x 30 mc x 10 mm mc x 10 and back to mc x 30 ...

Страница 9: ...lifier and loudspeakers The PPA20 turns off the output for a short time whenever you change any settings The LED on the front panel labelled mute will light when the output is muted If all the filters are off see page 18 and 20 the automatic muting may be triggered by the low frequency pulse generated when you lift the tone arm The output will switch itself back on after a short period 1 choosing ...

Страница 10: ...and low frequency noise and is useful for listening to older records In particular the bandpass filter can be used to remove the high frequency carrier signal from old quadraphonic recordings You can use the bandpass filter and the low frequency IEC filter at the same time to enhance the rejection of low frequencies When you listen to mono recordings you should select the mono setting This setting...

Страница 11: ...n cause an audible hum in your loudspeakers Should you have any problems with hum in your system please contact your retailer To minimise the possibility of mains hum in your system do not link the ground terminals of separate audio units together use screened cable for your signal connections and keep the left and right channel cables close together Consult the instructions for your turntable ton...

Страница 12: ...k panel of your PPA20 OUTPUT 1 and 2 each use two phono sockets one for left and one for right OUTPUT 1 and 2 are connected in parallel Always use high quality screened cables for your connections Some cartridges have such a high output that the resulting amplified output from the PPA20 is higher than the usual line level This will result in a higher volume when playing records compared with other...

Страница 13: ...nents As an option the PPA20 can be fitted with transformers to provide a balanced output via XLR connectors This gives greatly enhanced immunity to electromagnetic interference resulting in less noise especially if long cables are used This type of connection is often used in professional applications Please contact your retailer if you require this option If you do not have the transformer coupl...

Страница 14: ...s 100 pF when set to mm and 3300 pF when set to mc calculating load capacitance To calculate the value of the resistor to connect to the load plug you need to know the input or load resistance that your cartridge requires for optimum sound quality You should find this in the instructions for your cartridge You can calculate the load resistance by using the following formula RLOAD is the load resis...

Страница 15: ...uld be caused by a fault in the tonearm or turntable or in the interconnecting cables interference 29 running in and warming up running in warming up TAG McLaren Audio equipment is designed to give optimum performance for many years Just like a high quality car the performance of your PPA20 will improve during the first few hours of operation The electronic components will then have reached and se...

Страница 16: ... your PPA20 To change the fuse unplug the power cable and pull out the fuse carrier drawer 1 The fuse carrier contains a spare fuse this is the first one that you see when you open the carrier There are no other user serviceable parts inside the PPA20 In order to maintain the appearance of your PPA20 you can clean it as follows before cleaning always disconnect your PPA20 from the AC supply any gr...

Страница 17: ...14 mV 29 dB relative to 0 5 mV mc x 30 4 7 mV 33 dB relative to 0 1 mV OUTPUT 1 phono socket OUTPUT 2 phono socket OUTPUT 3 XLR optional connection OUTPUT 4 XLR optional connection standard not connected transformer pin 1 ground coupled pin 2 non inverting signal option pin 3 inverting signal 50 Ω nominal 11 V rms at 1 kHz greater than 75 dB relative to 0 5 V rms output mm 0 1 Hz 60 kHz mc x 10 0 ...

Страница 18: ... than 0 003 mc Less than 0 006 mm greater than 98 dB at 1 kHz All other modes greater than 100 dB at 1 kHz except mono 1 dB 1 5 dB with bandpass filter 3 dB at 20 Hz 6 dB octave slope 3 dB at 40 Hz and 20 kHz 12 dB octave slope 10 35 C power consumption dimensions including feet terminals and controls We reserve the right to alter design and specification without notice Specification may vary for ...

Страница 19: ...89 IEC65 A3 1992 EN60065 1993 EN50081 1 1992 EN55022 Class B 1994 EN60555 2 1987 EN61000 3 2 1995 EN61000 3 3 1995 FCC Part 15 Class B 1997 EN50082 1 1992 IEC801 2 1991 8 kV air discharge IEC801 3 1984 3 V m IEC801 4 1988 1 kV AC power 500 V other ports EN61000 4 2 1995 8 kV air 4 kV contact discharge EN61000 4 4 1995 1 kV AC power 500 V other ports EN61000 4 5 1995 2 kV common mode 1 kV different...

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