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Manual Pass Labs X250

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  • Pass Labs X250 - page 1

    P age 1 Pass X250 Owner's Manual ...

  • Pass Labs X250 - page 2

    P age 2 The X250 stereo a mplifier e mbodies the d esign tech nology and re fineme nts of th e larger "X" series ampl ifiers i ncluding extensi ons o f the pat ented Sup ersy mmetry circuit. The Supersy mmetr y cir cuit topolog y w as granted a U .S. p atent in 1994, and is th e result of 19 years of e ffort by Nelson Pass. The ampli fier ...

  • Pass Labs X250 - page 3

    P age 3 Setup You can posi tion th e ampli fier any w here y ou want, but i t requir es ventil ation. We do not recommend placing i t in enclose d cabinets or s mall closets w ithout means for air to circulate freely . The ampli fier idl es at ab out 270 w atts. Let’s tal k about power requir ements. The ampli fier dr aws abou t 2.3 am ps (conti ...

  • Pass Labs X250 - page 4

    P age 4 get fixed. We go to a lo t of trou ble to make prod ucts reli able, a nd the failure r ate o f our amplifiers is ver y low . This is sm all comfor t to the few , but take it easy an d giv e us a call i f you have probl ems. People are i nteres ted i n how long it takes for these ampli fiers to break i n. It tak es about a n hour for them to ...

  • Pass Labs X250 - page 5

    P age 5 Interconnects and Speak er Cables W e hav e a general recommen dation a bout interc onnects, whi ch is that they shoul d cost less than the a mplifier . W e have tri ed a lo t of pro ducts and most o f them w ork w ell, but as a practical matter w e cann ot make bl anket rec ommend ations. The ampli fier is not sensiti ve to s ource i nterc ...

  • Pass Labs X250 - page 6

    P age 6 Warranty Information This prod uct is w arranted for part s and la bor from t he dat e we ship i t. Check w ith th e factory authoriz ed distr ibutor in the countr y y ou are purc hasing this pr oduct for speci fic warr anty information. Distri butors are only r equir ed to offer w arranty serv ice on Pass products th at they have sol d. Th ...

  • Pass Labs X250 - page 7

    P age 7 Once it was r ecogniz ed that ex cessiv e use of negativ e feedback w as creati ng proble ms with the soun d, sev eral desig ners addr essed th e proble m by si mply r educing th e amount of feedback and regai ning the perfor mance by payi ng more at tenti on to the c haract er of th e amplify ing ci rcuit itsel f. Feedback st opped being a ...

  • Pass Labs X250 - page 8

    P age 8 Rushing to market in the 70’s wi th their low T IM distortion designs, c ompanies e m ploy ed either simpler or more complex circuits to achieve high slew rates. The ampl ifiers that had si mpler circuits w ith fewer parts t ended to so und better than th e amplifiers w ith complex circuits an d a lot of parts. They also cost l ess an d b ...

  • Pass Labs X250 - page 9

    P age 9 Supersym metry does n ot reduce t he distorti on and noise pr esent in either hal f of the output of the balanc ed circuit. Co mparing the distortion curv es before a nd a fter the ap plicati on of supersymm etry , we see essen tially no difference in ei ther h alf of the balanc ed pair consi dered alone. It is the b alanced differen tial c ...

  • Pass Labs X250 - page 10

    P age 10 ultimat ely w e f ound t hat w e could operate it w ithout feedb ack as l ong as w e put a he althy bias current thr ough it. For these am plifiers this is abo ut 600 w a tts worth. This is not pure Class A operati on in th e contex t of 1000 w atts output, but it has proven t o be the a ppropriate am ount. The result is a s eries of am pl ...

  • Pass Labs X250 - page 11

    P age 11 intrinsic ma tching between th e circuits, (c) th e distor tion o f each hal f wi th supersymm etry, and (d) the differenti al dist ortion w ith supersymme try. On this cur ve (B) we can cl early see that intri nsic sym metry due to the matching of the tw o halves r educes th e distorti on by a factor o f 10. Supersy mmetry (D) creates a m ...

  • Pass Labs X250 - page 12

    P age 12 ...

  • Pass Labs X250 - page 13

    P age 13 X250 distor tion curv e ...

  • Pass Labs X250 - page 14

    P age 14 X250 SPECIFICA TIONS All figur es obtai ned after 1 hour w armup, with r egulated 120 V AC power line. See manu al notes ab out AC p o wer line reg ulation. Gain 30 dB Freq. Response -0 dB at DC , -3 dB at 100 kHz Power Output 250 watts maxi mum @ 1% T HD, 1 kHz , 8 ohms Distorti on refer to accompany ing distortion c urve Maxi mum Output ...

Manufacturer Pass Labs Category Stereo Amplifier

Documents that we receive from a manufacturer of a Pass Labs X250 can be divided into several groups. They are, among others:
- Pass Labs technical drawings
- X250 manuals
- Pass Labs product data sheets
- information booklets
- or energy labels Pass Labs X250
All of them are important, but the most important information from the point of view of use of the device are in the user manual Pass Labs X250.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Pass Labs X250, service manual, brief instructions and user manuals Pass Labs X250. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Pass Labs X250.

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A complete manual for the device Pass Labs X250, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Pass Labs X250 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Pass Labs X250.

A complete Pass Labs manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Pass Labs X250 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Pass Labs X250, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Pass Labs X250, that we can find in the current document
3. Tips how to use the basic functions of the device Pass Labs X250 - which should help us in our first steps of using Pass Labs X250
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Pass Labs X250
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Pass Labs X250 in a specific country, if it was not possible to solve the problem on our own.

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