01 ye 08
Amps Anotasva Kutarisana: Lepai LP-2020A + vs. Topping TP30
Iyi ndiyo nguva dzakanaka zvechokwadi kune vashandi vashoma vanofarira audio. Kutenda nekukwira kwevatengesi veIndaneti vane ushamwari seGeek Express uye Monoprice kune marudzi ose emitambo yemitauro kunze uko pamatengo akaderera zvokuti mune dzimwe nguva vangangove vakasununguka.
Asi Icho Chero Chero Zvakanaka: Zvose Hazvikoshese
Mubvunzo, hongu, ndeyekuti vakanaka sei?
Chimwe chikwata apo iyo mitengo inoita kunge isingakwanisi pasi iri duku zvishoma zvakasimbiswa. Izvi zvinowanzove zvine chimwe chinhu kana zviviri, maitiro ekudzora, uye zvichida 10 kana 20 watts emasimba pagedhi. Zvichida hausi kuenda kunotsvaga izvi kusvika kune $ 2,000 mapiyona emakwikwi e-end-tower, asi vanoita setikiti yeti, ichiti, imwe yekare yeJBLs kana Polks, kana kuti vaviri veStyton Audio B652s.
Uye chengetedza matengo! The Lepai LP-2020A +, yakarongwa pamakumi maviri eatts per channel, ine $ 26.88 chete.
Asi tarisa kwekanguva! Parts Express inopawo Topping TP10-MK4, iyo inodhura madhora 72 asi inotarirwa pa 10 watts chete nechiyero muna 8 ohms. Zvose izvi zvinoshandisa teji teklasi yekugadzira T, iyo yakatumidzwa nokuti yakabva kune imwe kambani inonzi Tripath. Icho chiziviso, kwete chikwata chekudzidzira chikwata; zvinongova zvakasiyana-siyana zvepamusoro-soro Kirasi D (kuchinja) kukudziridza.
"Chii chinopa?" Ndakashamisika pandakaona mazamu maviri. Ichokwadi, iyo Topping inotaridzika zvakanaka, asi ine zvimwe zvinobatsira zvingave zvingaruramisa iyo inenge inoda kusvika 3x yakawanda here?
Ndaifanira kungoziva. Asi panzvimbo pokungoteerera ivo uye kukuudza kuti mumwe anopa "mukati mutsva" kana zvimwe "midrange yemvura," ndaizoita izvo vaongorori vakawanda vasingakwanisi: Ndaizotora mamwe maitiro emabhati pavari kuti ndizive zviri kuitika chaizvoizvo.
02 of 08
The Contestants
Kugadzirira Kuenzanisa
Ndakatenga LP-2020A + masvondo mashomanana adarika, uye vaviri veStonton B652 vakurukuri. Asi B652, kunyange zvakadaro, yakava chinhu chinoshamisa - kwete izvo munhu aizodaidza mutauri anonatswa, asi zvinoshamisa kuti anoteerera, kunyanya $ 32 / maviri.
Sezvo rombo ringava naro, shamwari yangu Geoff Morrison yakave neTopping TP30 yakagara yakakomberedza, iyo inoratidzika seyoyo yakagadzirisa iyo imwechete se TP10 MK4 nekuwedzerwa kwehephonephone jack uye USB digital input. Zvechokwadi, TP30 haisisipo.
Saka ndakanga ndiine vaviri vakwikwidza. Kutonga kubva ku specs chete, LP-2020A + inogona kunge ichiita yakakwirira, ine 20 watts pane imwe nzira pane 10. Zvisinei, handina kukwanisa kuwana chimwe chinhu paIndaneti Express iyo yakataura kuti 20 watts yakayerwa sei. Nokuda kwechikwata chemugadziri wemasimba kunoreva chero chinhu, iwe unofanirwa kutsanangura imhedheni yaakaedzwa mu (kazhinji 8 kana 6 kana 4 ohms); chiyero chekusvibiswa kweHarmoniki pamwe chete neruzha (THD + N) iyo iyo simba rinopiwa (kazhinji 0.5% kana 1% kana 10%); iyo nguva yakawanda kana nguva yakawanda iyo iyo muedzo yakatanga; uye nhamba yemigwagwa yakadzingwa.
Sezvaunogona kuona mumusana wepamberi wapfurwa pamusoro, TP30 iri chigadzirwa chakanaka, chakachengetedzeka uye nyaya yepamusoro-sumo-cable neRCA connectors.
Postscript
Mushure mokunge nyaya iyi ichinyorwa, muverengi (thanks, Jerrold!) Kutumira tsamba kuti vataure kuti vamwe LP-2020A + vadzidzisi vave vachivandudza masuniti avo ane simba rakakura, 5-amp sezvinobva kuAmazon. Izvo zvakafuridzira kuti ndidzokezve majekesiti pane Parts Parts site. Peji yeLP-2020A + yepaiti iyoyo inowedzera simba rinotengeswa neLP-2020A + rakaedzwa kuno 2 amps. Asi simba rekugonesa kwandakagamuchira rakarongwa pa3 amps. Iyo amplifier pachayo inonyorwa kune 2-amp supply.
Zvakanaka, regai tivhare mukati uye tione zvinoitika.
03 of 08
Lepai LP-2020A + Power Output
Kuedzwa kweLP-2020A +
Kuti uone kana iyo LP-2020A + inorarama kusvika kune 20-watts-per- power power claim, ndakashandisa clio yangu 10 FW audio analyzer kuti ndive nechinokanganisa pamwe nekunzwa nemhepo inosvika pa1 kHz. Kuparara kweHarmicic pamwe chete neruzha (THD + N) nharaunda iri pa Y (vertical axis), asi simba rinobuda (mu watts) riri pa X (horizontal) axis. Heino izvo zvandinazvo.
8-ohm mutoro, zvose zviri zviviri zvinoendeswa
9.1 watts pa 0.5% THD
9.9 watts pa1% THD
Kupinda mune 4-ohm mutoro, iyo LP-2020A + yakaramba ichienda mumudziviriro wemafungiro (yakabuda mumutambo, bhuruu rebhuruu kumativi ose ekudzora kupenya flashing) kusati kwapera, pasinei nokuti ndaisa sei mazamu akaoma. Ndakapedzisa kuenzanisa kubuda kwemaoko nemaoko. Izvo zvakakwirira zvandinowana pa 4 ohms zvaiva 9.4 watts pa 1.5% THD + N.
Cherechedzawo kuti kupotsa kune runyararo runomhanya zvakanyanya pamatunhu akaderera: 0.5% uye 1% THD + N pakati pe 0.1 ne 2.4 watts. Izvo zvakawanda zvekuterera kwako zvichave pazvikamu zvakaderera, kwete munzvimbo ye 5- kusvika 8-watt apo amp anoita zvakanakisisa.
Izvo zviyero zviri mumutoro wokudzivirira - izvo zvinonzi "dummy" zvinotakura tech tech geeks sezvandinoshandisa nokuti dzinotipa musimboti wepakutanga (asi zvinopesana nevatauri, vane mhedziso yakasiyana-siyana). Asi ndaiziva, kunyange zvakadaro, kuti mamwe maIndaneti asingadhuri yeClass D anoenderana nokuva nekutaura achishamwaridzana kuitira kuti ashande zvakanaka; kukwanisa kwekutauridza uye ruzivo runotora zvose re-radio-frequency energy inogadzirwa ne amp. Saka ndakamhanyira kufanana kwakafanana neHsu yangu Inotsvakurudza HB-1 Mk2 hurukuro (imhedheni 7.7 ohms pa 1 kHz) yakabatana panzvimbo yemutoro wevasinga. Mhinduro dzaive dzakangofanana: 8.9 watts pa 0.5% THD, 9.8 watts pa 1% THD.
04 of 08
Pamusoro pe TP30 Power Output
Kuedza TP30
Chati iri pamusoro apa chinoratidza Topping TP30 yakayera pasi pemamiriro akafanana. Ikoko tsvuku iri mu 8-ohm, mutero wepepuru uri mu 4-ohm mutoro.
8-ohm mutoro, zvose zviri zviviri zvinoendeswa
9.3 watts pa 0.5% THD
10.3 watts pa1% THD
4-ohm load, zvose zviri zviviri zvinotungamirirwa
16.4 maziso pa 0.5% THD
17.4 watts pa1% THD
Cherechedza kuti TP30 inopfuura sei LP-2020A + kunyange zvazvo zvarinotaura zvishoma? Inongoenda kunokuratidza - amp specs hazvirevi chinhu kunze kwekuti mamiriro ekuedzwa (THD + N nhamba, ingani mitsara inotungirwa, imhedheni yemutoro, nezvimwe) inopiwa.
Cherechedza zvakare kuti apo TP30 inokanganisa pamwe neruzha rwemazinga asina kukwirira harukuru, zviri nani kupfuura LP-2020A +, richigara pasi pe2,5% pamatengo pakati pe 0.4 watts uye max output.
05 of 08
Pamusoro pe TP30 Kuramba Mhinduro
Frequency response ndiyo chiyero chekufananidzana kwechigadziro chinokonzera maitiro ose emutsindo, kubva pasi kusvika kune midrange kuti ipfuure. Nekusimudzira, chibereko chakanaka ndechefa-flat flat at 0 dB.
Ndiri kuisa mhinduro dze TP30 pano kutanga nokuti ndaikwanisa kuwana chiyero chakajairika kubva nayo. Zvimwe pamusoro peLP-2020A + 's s results in this test coming up.
Frequency response, 8-ohm load, ref. level 2.83 volts (1 watt)
-0.32 dB pa20 Hz
-0.50 dB pa20 kHz
Chiteshi chekuenzanisa kukanganisa pa 1 kHz, 8-ohm load, ref. level 2.83 volts (1 watt)
nzira yakarurama +0.11 dB kumusoro kune yakasara
Zvakare, kwete chigumisiro chinoshamisa, asi kune unotengeswa amp inenge yakanaka.
06 of 08
Lepai LP-2020A + Frequency Response
Pandakaedza kuenzanisa mhinduro yeLP-2020A + yemajaya achishandisa mitambo ine mutambo yandakataura kare, ndakawana migumisiro isingazivikanwi. Mabhesi akazununguka zvakanyanya, pasi -3 dB pa 76 Hz. Zvisinei, handina kuona kusava kwebhasi apo ndakateerera LP-2020A +, saka ndakafunga kuti chigumisiro chacho chingave chiripo nokuda kweimwe idiosyncrasy yeLP-2020A + paunenge uchifambisa kushandiswa kwematambudziko.
Saka ndakasarudza kuenzanisa mhinduro yekutarisa nekubatanidza LP-2020A + kune imwe yeHsu HB-1 hurukuro, kuisa maikorofoni pamberi payo, kuita chidimbu chinowanzoita mhinduro kune mukurukuri, ndokudzokorora chiyero uchishandisa Topping TP30 pane yeLP-2020A +. Iwe unogona kuona chigumisiro pane grafu kumusoro, apo bhuruu inoratidzika inoratidza chigumisiro ne TP30, uye ruvara rwemagetsi rinoratidza chigumisiro neLP-2020A +. Izvi zvinowanikwa neLP-2020A + s sound controls yakadziviswa.
Frequency response, 8-ohm load, ref. level 2.83 volts (1 watt)
+4.86 dB pa20 Hz
0.00 dB pa20 kHz
Chiteshi chekuenzanisa kukanganisa pa 1 kHz, 8-ohm load, ref. level 2.83 volts (1 watt)
kuruboshwe mureza +0.21 dB kumusoro kupfuura kurudyi
Cherechedza kuti LP-2020A + 's bass response chaizvoizvo -1.26 dB pasi peyo TP30 pa30 Hz. Nokuda kwechimwe chikonzero, LP-2020A + ine kukurudzira kwakasimba pa20 Hz. Sezvo kune zvishoma zvishoma zveHz 20 mumafirimu nemimhanzi, uye ndiyo chete hurukuro uye hurukuro inogona kubereka 20 Hz, haisi chinhu chaunonzwa. Kwete seiiiiiiiiii inogona kutinhira zvinonzwika pane 20 Hz zvakadaro.
Chaizvoizvo, matanda, kana tonal balance, yezviputi zviviri izvi zvakafanana.
07 of 08
Lepai LP-2020A + Tone Dambudziko Rokudzora
Izvi ndizvo zvinokonzerwa nekutaura kwetauriri paLP-2020A + - zvakare, inotaridzwa nekushandisa amp kuburikidza neHsu HB-1 Mk3 mukurukuri. Rutivo rwebhuruu ndiyo migumisiro yekuti mabhesi nekutengesa zvinotenderera zvakashanduka. Tsvaga tsvuku ndeyekuita kwekuti maitirwo akadzora nzira yose.
Kuwedzera kwekuwedzera nekucheka kwezvinhu zvose zviri kurongeka kwe10 kusvika ku12 dB, iyo yakawanda yakakura. Cherechedza kuti izvi zviyero zvinotorwa pachitaridziro chema 1 watt. Kana iwe uchinge uchinge uchinge uchitarisa izvi zvese nenzira inonyanya kuterera mazinga, LP-2020A + inogona kunge isina simba rakakwana rokuratidza kukura kwaunoona pano.
08 we 08
Nhepfenyuro dzokuteerera uye Kugumisa
Zvechokwadi Kuterera
Misiyano iyi inoshandurirwa sei kune zvakanyatsonzwa kuteerera? Kuti ndiwane, ndakafananidza mazamu maviri paakaenzana nekuteerera mazinga akabatana neHsu HB-1 hurukuro. Ndakataura chinhu chimwe chete pakarepo: The Topping TP30 ingashandisa zvishoma kuwana pfuma. Ndaifanira kutendeuka yose kuitira kuti ndive nehuwandu hwepamusoro apo ndaishandisa iPod touch yangu sechinhu-kunyange zvazvo HB-1 iri mutauriri anoshanda zvakanaka.
Munzeve dzangu, LP-2020A + inobata mukati mekatikati uye pasi inotenderera inoita kuti inzwi rive rinonzwika zvishoma. Pane saxophonist Terry Landry akanyoresa "Amazonas" mamwe emidziyo ye latin percussion aiva nechinangwa chekuita kwavari, sekunge dai yakaputsika. Zvisinei, mutambo weLP-2020A + wepamusoro unonzwika zvishoma nezvishoma, sezvo zviyero zvataurwa; iyo TP30 inonzwika zvishoma zvishoma mukutenderera nokuenzanisa. Asi zvakadzika, zvine simba zvinyorwa zvinotanga kuvhara "Train Song" yaHolly Cole yakanzwika zvakanyanya uye zvishoma zvishoma kuburikidza ne TP30.
Pasi pose, ndingati TP30 inonzwika zviri nani, kunyange zvazvo vose vane simba uye vasina simba. Ndinofungidzira vamwe vangasarudza kurira kweLP-2020A +. Uye ndinofungidzira vamwe vangave vasina kumboona kusiyana.
Izwi Rokupedzisira
Inoratidzika kubva pane zvandinotarisa kuti Topping TP30 ndizvo zvandinodaidza kuti " real amp ": Unogona kuisungira kusvika kune chero hurukuro uye icharatidza hutano hwakanaka hwekuteerera uye yakachena inzwi.
Lepai LP-2020A +, kunyange zvakadaro, inoratidzika kunge yakaisa mamwe maitiro ekugadzirwa kwemasayenzi ayo anobvumira kuti irove iyo ye-low-price price point. Inogadzirisa zvakakwana simba rakafanana remasimba mumutoro we 8-ohm se 4x-yakawanda-inodhura TP30.
Heano mazano angu: Tora TP10-MK4 kana uri kuisa pamwe yakakomba desktop audio system kana bhajheji yekamuri yekugara kana nzvimbo yekugara. Tora LP-2020A + kana iwe uchitsvaga chimwe chinhu chinopa inzwi rakanaka, rakafanana negaraji yegaraji kana kuti kutamba lite jazz muchigarire.