01 a 08
Mapulogalamu Osauka Amasowa: Lepai LP-2020A + vs. Topping TP30
Izi ndi nthawi zabwino kwambiri kwa okonda ndalama zotsika mtengo. Chifukwa cha kuwonjezeka kwa amalonda a pa Intaneti omwe amagwirizana ndi geek monga Parts Parts ndi Monoprice pali mitundu yonse yamakina ojambula kunja komwe pamtengo wotsika kwambiri moti nthawi zina iwo akhoza kukhala omasuka.
Koma Zili Zabwino: Zonse Zili Pang'ono
Funso, ndithudi, ndilibwino bwanji?
Chigawo chimodzi chomwe mitengoyo ikuwoneka kuti ndi yovuta kwambiri ndi amplifiers ochepa. Amps amenewa ali ndi njira imodzi kapena ziwiri, mphamvu yolamulira, ndipo mwina 10 kapena 20 watts amphamvu pa kanjira. Mwinamwake simungagwirizane ndi makanema awiri a $ 2,000 a nsanja yapamwamba, koma amawoneka ngati tikiti, kunena, JBLs kapena Polks, kapena awiri a Dayton Audio B652s.
Ndipo onani mitengo! Lepai LP-2020A +, yomwe imawerengedwa pa watts 20 pamsewu, ndi $ 26.88 chabe.
Koma dikirani miniti! Mbali Express imaperekanso Topping TP10-MK4, yomwe imadula $ 72 koma imayimilira pa Watt 10 pa channel mpaka 8 ohms. Zonsezi zimagwiritsa ntchito luso lamakono lamakono a T, omwe amatchulidwa chifukwa amachokera ku kampani yotchedwa Tripath. Ndi chizindikiro, osati gulu lodziwika bwino; Ndizosiyana kwambiri ndi Maphunziro D (kusintha) kukulitsa.
"Chikupatsani chiyani?" Ndinadabwa pamene ndinawona zipsera ziwiri. Zoonadi, Topping ikuwoneka bwino, koma kodi ili ndi ubwino wina uliwonse umene ungakwaniritse mtengo wake wokwanira pafupifupi 3x?
Ndinangoyenera kufufuza. Koma m'malo mowamvetsera ndi kukuuzani kuti munthu amapereka "mkati mwatsatanetsatane" kapena "midrange yamadzi," ndikuchita zomwe owerengera ambiri sangathe: Ndikanathamanga ma tepi ena pa iwo kuti ndipeze zomwe zikuchitikadi.
02 a 08
Otsutsana
Konzekerani Kuyerekezera
Ndinagula ndekha LP-2020A + masabata angapo apitawo, ndi oyankhula a Dayton B652. Komabe, B652 inakhala chinthu chodabwitsa - osati zomwe aliyense angatchule woyankhula wolongosola, koma zodabwitsa zomvera, makamaka $ 32 / awiri.
Monga mwayi ukanakhala nawo, mnzanga Geoff Morrison anali ndi Topping TP30 atazungulira, zomwe zikuwoneka kuti zimakhala zofanana ndi TP10 MK4 ndi kuwonjezera kwa jekisoni ya m'manja ndi USB digito. Inde, TP30 sichipezeka.
Kotero ine ndinali ndi awiri anga okangana. Poganizira za specs zokha, LP-2020A + ikhoza kuwoneka ngati wamkulu, ndi ma watts 20 pa kanjira m'malo 10. Komabe, sindinapeze kalikonse pa tsamba la Express Express lomwe linanena momwe ma watt 20 anali kuyesedwa. Kuti muyese mphamvu yamagetsi kuti mutanthawuze chirichonse, muyenera kufotokozera impedance yomwe inayesedwa (makamaka 8 kapena 6 kapena 4 ohms); kusokoneza kwathunthu kwa harmonic kuphatikizapo phokoso (THD + N) pomwe mphamvu yapatsidwa (nthawi zambiri 0,5% kapena 1% kapena 10%); mafupipafupi kapena mafupipafupi omwe mayeserowo adayendetsedwa; ndi chiwerengero cha njira zotsatiridwa.
Monga momwe mukuwonera kumbuyo kwa mawonekedwe apamwamba pamwambapa, TP30 ndi mankhwala opangidwa bwino, okhala ndi vuto lolimba komanso oyankhula-apamwamba-ojambula ndi opangira RCA.
Postscript
Pambuyo polemba nkhaniyi, wowerenga (thanks, Jerrold!) Atumizira mauthenga kuti ena a LP-2020A + akhala akukonzekera mayunitsi awo okhala ndi mphamvu zowonjezera, zazikulu zisanu ngati izi kuchokera ku Amazon. Chimene chinandichititsa kuti ndiwerenge kachidutswa kakang'ono pa tsamba la Express Express. Tsambali la LP-2020A + pa tsamba limeneli limagwiritsa ntchito mphamvu zomwe zimatumizidwa ndi LP-2020A + kuyesedwa apa 2 amps. Koma mphamvu yomwe ndalandira inayikidwa pa 3 amps. Mphamvu ya amplifizi yokha imalembedwa ndi 2-amp supply.
Chabwino, tiyeni tilowemo mkati ndi kuona zomwe zimachitika.
03 a 08
Lepai LP-2020A + Power Output
Kuyesa LP-2020A +
Kuti ndiwone ngati LP-2020A + ikukhala ndi mphamvu ya 20-watts-njira , ndinagwiritsa ntchito katswiri wanga wa audio wa Clio 10 FW kuti ndiyambe kusokoneza komanso phokoso ndi mphamvu zowonongeka pa 1 kHz. Kusokoneza kwathunthu kwa harmonic komanso phokoso (THD + N) lili pa Y (zowonongeka), pamene mphamvu yotuluka (mu watts) ili pa X (yopanda malire). Nazi zomwe ine ndiri nazo.
8-ohm load, njira zonse ziwiri zoyendetsedwa
9.1 Watts pa 0,5% THD
9.9 Watts pa 1% THD
Mu katundu wa 4-ohm, LP-2020A + inkapitirizabe kutetezedwa (kutuluka kumene, kutuluka kwa buluu kuzungulira kuthamanga kwavundumu) kusanayambe kutha, ziribe kanthu momwe ndakhazikitsira magawo. Ndinamaliza kuyeza kuchulukitsa kwa dzanja. Mtundu wapatali womwe ndimapeza pa 4 ohms unali 9.4 Watts pa 1.5% THD + N.
Onaninso kuti kusokoneza kuphatikizapo phokoso limathamanga kwambiri pamasitepe apansi: 0,5% ndi 1% THD + N pakati pa 0.1 ndi 2.4 Watts. Kumvetsera kwanu kumakhala pamunsi otsika, osati mugawo la 5- mpaka 8-watt komwe amp amphamvu amayesetsa.
Miyesoyi imakhala muzinthu zothandizira - zomwe zimatchedwa "dummy" zomwe zimagwiritsa ntchito mapulojekiti ngati ine chifukwa zimatipatsa maziko osasinthika (mosiyana ndi okamba, omwe matupi awo amasiyana kwambiri). Komabe, ndinkadziwa kuti ma TV amtundu wotsika kwambiri amadalira kukhala wokamba nkhani kuti agwirizane bwino; Capacity and inductance ya wokamba nkhani imayamwa mphamvu yonse ya wailesi yomwe imapangidwa ndi amp. Kotero ine ndinayendayenda chimodzimodzi ndi olemba anga a Hsu Research HB-1 Mk2 okamba (impedance 7.7 ohms ku 1 kHz) okhudzana mmalo mwa zosokoneza katundu. Zotsatira zinali zofanana: 8.9 Watts pa 0,5% THD, 9.8 Watts pa 1% THD.
04 a 08
Pamwamba pa TP30 Power Output
Kuyesa TP30
Tchati cha pamwambachi chikusonyeza Topping TP30 kuyesedwa pansi pa zofanana. Kuwonekera kobiriwira kumakhala kulemera kwa 8-ohm, tsatanetsatane wofiira uli mu katundu wa 4-ohm.
8-ohm load, njira zonse ziwiri zoyendetsedwa
9.3 Watts pa 0,5% THD
10.3 Watts pa 1% THD
4-ohm load, njira zonse zoyendetsedwa
16.4 Watts pa 0.5% THD
17.4 Watts pa 1% THD
Onani momwe TP30 imasinthira LP-2020A + ngakhale kuti zidziwitso zake ndizochepa? Zimangokuwonetsani - sizitanthauza kanthu kupatula ngati mayesero (THD + N mlingo, njira zingati zothandizira, kutsekera kwa katundu, etc.) amaperekedwa.
Onaninso kuti ngakhale kutayika kwa TP30 kuphatikizapo phokoso lochepa kwambiri silibwino, ndibwino kwambiri kuposa LP-2020A +, kukhala pansi pa 0,5% pamtunda pakati pa 0.4 watts ndi max output.
05 a 08
Pamwamba pa TP30 Kawirikawiri Yankho
Kuthamanga kwafupipafupi ndiyeso la momwe oyendetsa operekera amalumikizira maulendo onse a phokoso, kuyambira pansi mpaka pakati kuti ayende. Kuti mukhale wopukutira, zotsatira zabwino ndizomwe zili zakufa pa 0 dB.
Ndikuika zotsatira za TP30 pano choyamba chifukwa ndatha kupeza chiyeso choyenera kuchokera pamenepo. Zambiri zokhudza zotsatira za LP-2020A + zowonongeka izi zikubwera.
Kuyankha kwafupipafupi, katundu wa 8-ohm, ref. mlingo 2.83 volts (1 watt)
-0.32 dB pa 20 Hz
-0.50 dB pa 20 kHz
Kulakwitsa kwachitsulo pamtunda pa 1 kHz, 8-ohm load, ref. mlingo 2.83 volts (1 watt)
kanjira yolondola +0.11 dB kuposa yomwe yatsalira
Kachiwiri, osati chotsatira chodabwitsa, koma cha mtengo wotsika amatha bwino.
06 ya 08
Lepai LP-2020A + Frequency Response
Pamene ndimayesa kufufuza kuyankha kwafupipafupi kwa LP-2020A + pogwiritsa ntchito zitsulo zomwe ndatchula kale, ndinapeza zotsatira zachilendo. Zitsulozi zinagwedezeka kwambiri, pansi -3 dB pa 76 Hz. Komabe, sindinazindikire kuti panalibe mabasi pamene ndinamvetsera LP-2020A +, choncho ndinaganiza kuti zotsatira zake zikhoza kukhala chifukwa cha maulendo ena a LP-2020A + pamene akuyendetsa galimoto.
Kotero ndinaganiza kuti ndiyese yankho lafupipafupi pogwirizanitsa LP-2020A + mmodzi mwa omvera anga a Hsu HB-1, ndikuyika maikolofoni patsogolo pake, ndikuyankhira pampando wokamba, ndikubwereza chiyeso pogwiritsa ntchito Topping TP30 mmalo mwake la LP-2020A +. Mukhoza kuona zotsatira pa grafu pamwambapa, kumene trace ya buluu imasonyeza zotsatira ndi TP30, ndipo mtundu wobiriwira umasonyeza zotsatira ndi LP-2020A +. Zotsatirazi zili ndi LP-2020A + 's controls zaletsa.
Kuyankha kwafupipafupi, katundu wa 8-ohm, ref. mlingo 2.83 volts (1 watt)
+4.86 dB pa 20 Hz
0.00 dB pa 20 kHz
Kulakwitsa kwachitsulo pamtunda pa 1 kHz, 8-ohm load, ref. mlingo 2.83 volts (1 watt)
yotsalira njira +0.21 dB kuposa kuposa
Dziwani kuti kuyankha kwa LP-2020A + kuli -1.26 dB pansi pa TP30 pa 30 Hz. Pa chifukwa china, LP-2020A + ili ndi mphamvu zowonjezera pa 20 Hz. Popeza kuti pali mafilimu ndi maimelo ochepa kwambiri a Hz 20, ndipo zokhazokha zokhazokha zowonongeka ndi subs zimatha kubala 20 Hz, sizinthu zomwe mumamva. Osati ngati amphamvu yaying'onoyi ikhoza kupereka mauthenga omveka bwino pa Hz 20.
Kwenikweni, mzere, kapena tonal balance, ya amps awiriwa ndi ofanana.
07 a 08
Lepai LP-2020A + Tone Zotsatira za Kulamulira
Izi ndi zotsatira za kulamulira kwa voti pa LP-2020A + - kachiwiri, kuyesedwa mwa kuyendetsa amp amphamvu kudzera mwa olankhula Hsu HB-1 Mk3. Tsitsi la buluu ndi zotsatira za kukhala ndi zitsulo ndi zowonongeka. Tsatanetsatane wofiira ndi zotsatira za kukhala ndi mayendedwe otsekedwa njira yonse.
Kuwonjezeka kwakukulu ndi kudula zonsezi ndi dongosolo la 10 mpaka 12 dB, lomwe liri lalikulu kwambiri. Tawonani kuti miyesoyi imatengedwa pamtundu wa 1 Watt. Ngati mumagwiritsa ntchito njira zonsezi pakamvetsera kwambiri, LP-2020A + ikhoza kukhala ndi mphamvu zokwanira kuti ikuthandizeni.
08 a 08
Mfundo Zomvetsera ndi Kutsiriza
Zoonadi Kumvetsera
Kodi kusiyana kotereku kumatanthawuzira motani kumvetsetsa kwenikweni? Kuti ndidziwe, ndinafanizira zipsera ziwiri pamasomelo omvera omwe akugwirizana ndi olankhula Hsu HB-1. Ndinazindikira chinthu chimodzi pomwepo: Top Top TP30 ingagwiritse ntchito phindu lina. Ndinafunika kuyipeza mpaka nditenge voliyumu pamene ndimagwiritsa ntchito iPod touch ngati gwero - ngakhale HB-1 ndi wokamba bwino bwino.
Kumva kwanga, LP-2020A + imakhala yovuta mkatikatikatikati ndi pamtunda wotsika omwe amachititsa mawu kumveka pang'ono. Pa kafukufuku wa terry Terry Landry olemba "Amazonas" zina mwa zida zoimbira nyimbo zapamwamba zinali ndi phokoso kwa iwo, ngati kuti zidathyoka. Komabe, mndandanda wa LP-2020A + wapamwamba umamvekanso pang'ono, monga momwe mayendedwe akunenera; TP30 imamveka pang'onopang'ono pang'onopang'ono poyerekeza. Koma zida zakuya, zamphamvu zakuti "Songu ya Tchire" ya Holly Cole imamveka mozama komanso mopitirira malire kudzera mu TP30.
Zonsezi, ndinganene kuti TP30 imamveka bwino, ngakhale kuti onse ali ndi mphamvu ndi zofooka. Ndikuganiza ena angasankhe phokoso la LP-2020A +. Ndipo ine ndikulingalira ena mwina sangakhoze ngakhale kuzindikira kusiyana.
Mawu Otsiriza
Zikuwonekera kuchokera muyeso yanga yomwe Top Top TP30 ndi yomwe ine ndikanati ndi " real amp ": Mungathe kuigwiritsa ntchito kwa oyankhula aliyense ndipo idzapereka mndandanda womvetsera bwino komanso womveka bwino.
Komabe, Lepai LP-2020A +, ikuoneka kuti ikuphatikizapo zinthu zina zomwe zimapangitsa kuti izi zitheke. Zimapanga mphamvu zofanana mofanana ndi katundu wa 8-ohm monga TP30 4x-yotsika mtengo kwambiri.
Pano pali ndondomeko yanga: Pezani TP10-MK4 ngati mukuyika pulogalamu yodabwitsa ya kompyuta kapena chipinda cha bajeti kapena chipinda chokhalamo. Pezani LP-2020A + ngati mukufuna chabe chinachake chomwe chimapanga mawu abwino, monga galasi kapena kusewera jazz mu chipinda chodikirira.