01 ngo 08
I-Amps e-Cheap Off: Lepai LP-2020A + vs. Topping TP30
Ezi zihlandlo ezilungileyo ngokwenene abathandekayo abanomculo abancinci. Siyabonga ngokunyuka kwabathengisi be-intanethi abanobuchwephesha be-intanethi njengeengxenye ze-Express Express kunye ne-Monoprice kukho zonke iintlobo zeemveliso zomsindo ngaphandle kwamanani amaninzi kangangokuthi kwezinye iimeko ziphantse zikhululeke.
Kodwa Ngaba Ziyinto Enhle: Zomibini Zixabiso Eliphantsi
Umbuzo, ewe, yintoni efanelekileyo?
Elinye iqela apho amaxabiso abonakala engenakwenzeka phantsi ahlanganiswe amancinci amanyeneyo. Ezi mpahla zinomxholo omnye okanye ezimbini, ulawulo lwevolumu, mhlawumbi i-10 okanye i-20 watts yamandla kwiseshini. Mhlawumbi awuyi kubambelela kwi-2,000 yezigidi zezivakalisi ezikwinqanaba eliphezulu, kodwa zibonakala nje ithikithi, zithi, i-JBL okanye iPolks ubudala, okanye iqela elitsha lama-Dayton Audio B652s.
Uze ujonge amaxabiso! I-Lepai LP-2020A +, elinganiswe kuma-watts angama-20 ngomzila ngamnye, i-$ 26.88 kuphela.
Kodwa linda umzuzu! IiNgxenye zeNgcaciso zibonelela nge-Topping TP10-MK4, ebiza i-$ 72 kodwa ivalwe kuma-watts ama-10 kuphela kwisitya ukuya kuma-oh ohms. Bobabini basebenzisa iteknoloji ye-Class T amplifier, ebizwa ngokuba ivela kwinkampani egama linguTalkath. Inguphawu lokuthengisa, kungekhona iklasi ye-amplifier eyaziwayo; Ngokwenene nje yinto ehlukileyo yokusebenza kakuhle kweCandelo D (ukutshintsha) ukukhulisa.
"Yintoni eyenza?" Ndandicinga xa ndibona iimps ezimbili. Ngokuqinisekileyo, i-Topping ibheka i-nicer eninzi, kodwa ingaba nayiphi na enye inzuzo eza kulungelelanisa ixabiso layo elingu-3x?
Ndandifuna ukufumanisa. Kodwa kunokuba nje uphulaphule kwaye uxelele ukuba umntu unika "iinkcukacha zangaphakathi" okanye ngaphezulu "kwimizila engaphakathi," ndiya kwenza oko abahloli abaninzi abakwaziyo ukukwenza: Ndiya kuqhuba amanyathelo okubhaliweyo kubo ukuze ndifumane oko kwenzeka ngokwenene.
02 ngo 08
Abadlali
Ukulungela Ukuthelekisa
Ndithenge i-LP-2020A + iiveki ezimbalwa ezedlulileyo, kunye neesibini zeentetho ze-Dayton B652. Kodwa, i-B652, yaba yinto ephawulekayo - kungekhona nawuphi na umntu ongabiza isithethi esilungileyo, kodwa ngokumangalisa ukuphulaphulwa, ngokukodwa kwi-$ 32 / ibini.
Njengoko inhlanhla yayiya kuba nayo, umhlobo wam uGeffrey Morrison wenzeka ukuba abe ne-Topping TP30 ehleli ngeenxa zonke, ebonakala ngathi yinto efana ne-amplifier ye-TP10 MK4 kunye nokongezwa kwe-headphone jack kunye ne-USB digital input. Kakade, i-TP30 ayisekho.
Ngoko ke ndabandwendwela bam ababini. Ukuqwalasela kwi-specs yodwa, i-LP-2020A + inokubonakala ibonakala iphakamileyo, i-watts ezingama-20 nganye kwiseshini esikhundleni se-10. Nangona kunjalo, andizange ndifumane nantoni kwi-Parts Express Express eyathethi ukuba i-watts ezingama-20 yayilinganiswa njani. Ukuze umlinganiselo wamandla wokukhulisa amandla uthetha nantoni na, kufuneka uchaze impepha evivinywe kuyo (ngokuqhelekileyo 8 okanye 6 okanye 4 ohms); ukulinganisa i-harmonic kunye nentsimbi (THD + N) apho kunikwe amandla okulinganisa (ngokuqhelekileyo i-0.5% okanye i-1% okanye i-10%); ububanzi okanye ububanzi bexesha apho uvavanyo luqhutywa khona; kunye nenani lezithuthi eziqhutywa.
Njengoko ubona kwiphaneli elingemuva eliphambili ngaphezulu, i-TP30 ngumkhiqizo ongcono-phambili, kunye necala elinobuchule kunye ne-high-quality speaker-cable kunye ne-RCA.
Postscript
Emva kokuba le nqaku ifakwe, umfundi (mbulela, Jerrold!) Uthumele i-imeyile ukuze ubonise ukuba abanye abanikazi be-LP-2020A + baye baphucula iiyunithi zabo ezinamandla, ama-amp amp 5-amp like this from Amazon. Yintoni ephefumlelweyo ukuba ndibuye ndibuyele kwii-specs kwi-Parts Express Express. Ikhasi le-LP-2020A + kwinqanaba le-site ukuthengiswa kwamandla okuthunyelwa nge-LP-2020A + ivavanywe apha nge-2 amps. Kodwa ukubonelelwa kwamandla endifumanayo kufakwe kwii-3 amps. I-amplifier ngokwayo ibhalwe nge-2 amp amp supply.
Kulungile, makhe sixoxe kwaye sibone okwenzekayo.
03 we-08
Lepai LP-2020A + Iziphumo zamandla
Ukuvavanya i-LP-2020A +
Ukuze sibone ukuba i-LP-2020A + ihlala kwi- 20-watts -ngayinye yamanqaku ombane wamashishini, ndasebenzisa umhlalutyi womsindo wam i-Clio 10 FW ukuqhuba ukuphazamiseka kunye nentsimbi kunye nombane utshayela kwi-1 kHz. Ukuhlukumeza kwamaHarmic kunye nentsimbi (THD + N) kwinqanaba le-Y (i-axis ebonakalayo), ngelixa amandla okuphuma (kwi-watts) e-X (enezandi). Nantsi into endiyenayo.
8-ohm umthwalo, zombini iziteshi eziqhutywa
9.1 i-watts kwi-0.5% ye-THD
9.9 watts kwi-1% ye-THD
Kulo mthwalo we-4-ohm, i-LP-2020A + yaqhubeka ihamba kwimodi yokukhusela (ukuphuma kombane, ukukhanya okwesibhakabhaka ukujikeleza umthamo we-volume) ngaphambi kokugqitywa, kungakhathaliseki ukuba ndibeka njani iiparameters ezitshabalalayo. Ndagqiba ukulinganisa umkhiqizo omkhulu ngesandla. Isiphumo esiphezulu esinokufumana kwi-4 ohms sasingu-9.4 watts kwi-1.5% ye-THD + N.
Qaphela kwakhona ukuba ukuphazamiseka kunye nentsimbi ephezulu kakhulu kumazinga aphantsi: 0.5% kunye ne-1% ye-THD + N phakathi kwe-0.1 kunye ne-2.4 watts. Uninzi lwayo lokuphulaphula luya kuba kula mazinga aphantsi, kungekhona kwiphondo elingama-5- ukuya kuma-8-watt apho i-amp isenza kakuhle.
Ezi milinganiselo zibaxhatshali bemithwalo - okubizwa ngokuba yi-"dummy" imithwalo ye-tech geeks endiyisebenzisayo ngenxa yokuba isinika isiseko esivumelanayo (ngokuchasene nezivakalisi, i-impedance yayo iyahluka kakhulu). Ndiyazi, nangona kunjalo, ukuba ezinye ii-Amps ze-Class D ezingabizi zixhomekeke ekubeni nesithethi sidibaniswe ukuze sisebenze ngokuchanekileyo; ubukhulu besikhulumi kunye nefuthe lusetyana lonke amandla oonomathotholo oveliswa ngu-amp. Ngoko ke ndigijime ngokufanayo kunye ne-Hsu Research HB-1 Mk2 izithethi (impedance 7.7 ohms kwi-1 kHz) exhunywe endaweni yokuxhathisa imithwalo. Iziphumo ziphantse zifana: 8.9 iitts kwi-0.5% ye-THD, i-9.8 watts kwi-1% ye-THD.
04 we-08
I-TP30 Power Output
Ukuvavanya i-TP30
Ishadi elingentla libonisa i-Topping TP30 ilinganiswe phantsi kweemeko ezifanayo. Uluhlu oluluhlaza luba ngumthwalo we-8-ohm, umkhondo obomvu ube ngumthwalo we-4-ohm.
8-ohm umthwalo, zombini iziteshi eziqhutywa
9.3 amatyitha kwi-0.5% ye-THD
10.3 amatshini kwi-1% ye-THD
4-ohm umthwalo, zombini iziteshi eziqhutywa
16.4 iilitha kwi-0.5% ye-THD
17.4 iilitha kwi-1% ye-THD
Phawula indlela i-TP30 eyenze ngayo i-LP-2020A + nangona iincwadana zayo zingaphantsi? Uhamba nje ukukubonisa - ama-amp specs asithathi nto ngaphandle kokuba iimeko zokuvavanya (i-THD + N, inqanaba elingaphathwayo, impepha yokulayisha, njl.) Zinikwe.
Qaphela kwakhona ukuba ngelixa i-TP30 ephazamisayo kunye nesandi njengoko amanqanaba aphantsi awona mkhulu, kungcono kunokuba i-LP-2020A +, ihlale phantsi kwe-0.5% kumazinga phakathi kwe-0.4 watts kunye nemveliso ephezulu.
05 ka 08
I-Topping TP30 Impendulo yexesha eliqhelekileyo
Ukuphendula ngokuphindaphindiweyo ngumlinganiselo wendlela efanayo ngayo i-amplifier ivelisa zonke iifrikhi zesandi, ukusuka kwi-bass ukuya kwi-midrange ukuhamba. Ukuze i-amplifier, umphumo omuhle ngumgca we-flat-dead e-0 dB.
Ndibeka iziphumo ze-TP30 apha kuqala kuba ndakwazi ukufumana umlinganiselo oqhelekileyo kuwo. Eminye malunga neziphumo eziqinileyo zeLP-2020A + kule vavanyo ezayo.
Ukuphendula ngokuphindaphindiweyo, umthwalo we-8-ohm, u-ref. nqanaba 2.83 volts (1 watt)
-0.32 dB kwi-20 Hz
-0.50 dB kwi-20 kHz
Iphutha lokulinganisela kwesiteshi kwi-1 kHz, umthwalo we-8-ohm, u-ref. nqanaba 2.83 volts (1 watt)
umzila ochanekileyo +0.11 dB phezulu kunekhohlo
Kwakhona, akusiyo imiphumo emangalisayo, kodwa ngexabiso elingathengi likhulu kakhulu.
06 we-08
Lepai LP-2020A + Impendulo yexesha eliqhelekileyo
Xa ndizama ukulinganisa impendulo ye-LP-2020A + ye-frequency ngokusebenzisa abaxhatshazi bemithwalo engayichaze ngaphambili, ndafumana iziphumo ezingaqhelekanga. Iibhasi zijikiweyo ngokukhawuleza, phantsi -3 dB kwi-76 Hz. Nangona kunjalo, andizange ndibone ukungabikho kwamabhasi xa ndiphulaphule i-LP-2020A +, ngoko ndacinga ukuba umphumo ungase ube ngenxa ye-idiosyncrasy ethile ye-LP-2020A + xa uqhuba ukuxhatshaza umthwalo.
Ngoko ke ndagqiba ukulinganisa impendulo yendima ngokuxhuma i-LP-2020A + kwenye yeeHouse ze-Hsu-1 zithethi, ndibeka imakrofoni phambi kwayo, ndenze impendulo ephindaphindiweyo kwisithethi, ngokuphindaphinda umlinganiselo usebenzisa i-Topping TP30 esikhundleni ye-LP-2020A +. Uyabona umphumo kwigrafu apha ngasentla, apho umkhondo ohlaza okwesibhakabhaka ubonisa umphumo nge-TP30, kwaye ulandelelwano oluhlaza lubonisa umphumo nge-LP-2020A +. Ezi ziphumo zilawulwa yi-LP-2020A +'s tone controls.
Ukuphendula ngokuphindaphindiweyo, umthwalo we-8-ohm, u-ref. nqanaba 2.83 volts (1 watt)
+4.86 dB kwi-20 Hz
0.00 dB kwi-20 kHz
Iphutha lokulinganisela kwesiteshi kwi-1 kHz, umthwalo we-8-ohm, u-ref. nqanaba 2.83 volts (1 watt)
ikhefu elishiye +0.21 dB phezulu kunene
Qaphela ukuba impendulo ye-LP-2020A + yeyona empeleni -1.26 dB ngaphantsi kwe-TP30 kwi-30 Hz. Ngesizathu esithile, i-LP-2020A + inokunyusa okuyi-20 Hz. Ngenxa yokuba kunomxholo omncinci we-Hz kumabhayisikobho nakumculo, kwaye yiyo kuphela izithethi ezinkulu kunye ne-subs ekwazi ukuvelisa i-Hz 20, akuyiyo into oyayiva. Andiyithandi le-amp amp ikwazi ukunikela ngokuvelisa ngokuvakalayo kwi-20 Hz nantoni na.
Ngokukodwa, i-timbre, okanye i-tonal balance, kwezi zimbini ezimbini zifana noko.
07 ka 08
Lepai LP-2020A + Iziphumo zoLawulo lweTone
Le yimiphumo yokulawula ithoni kwi-LP-2020A + - kwakhona, kulinganiswa ngokusebenzisa i-amp amp ngeHsu HB-1 Mk3 isithethi. Umtsalane ohlaza okwesibhakabhaka ngumphumo wokuba i-bass kunye neendlela zokulawula zihamba ngendlela yonke. Uluhlu olubomvu luyimpembelelo yokuba ukulawula kuthintela yonke indlela.
Ukuphakama okukhulu kunye nokunquma zombini kulandelelwano lwe-10 ukuya ku-12 dB, oluluhlu olubanzi. Qaphela ukuba le milinganiselo ithathwa kwinqanaba lokubhekisela kwi-1 watt. Ukuba uxolela oku kulawula yonke indlela kwizinga eliphezulu lokuphulaphula, i-LP-2020A + ingenakho amandla anele okwenzela ukukhulisa okubonayo apha.
08 ka 08
Amanqaku okuphulaphula nokuphelisa
U ku mamela
Ezi zintlukwano ziguqulela njani kumava okuphulaphulayo? Ukuze ndifumanise, ndithelekisa ii-amps ezimbini kumanqanaba aphulaphulayo adibeneyo kwiintetho ze-Hsu HB-1. Ndaphawula enye into ngokukhawuleza: I-Topping TP30 ingasebenzisa inzuzo encinane. Kwafuneka ndiyijike yonke indlela ukuze ndifumane ivolumu elungileyo xa ndisebenzisa i-iPod touch njengomthombo - nangona i-HB-1 iyisithethi esisebenzayo.
Endlebeni zam, i-LP-2020A + inobungqingili phakathi kwe-midrange kunye ne-low-treble eyenza amazwi abe umsindo. Kwi-saxophonist ukurekhoda kukaTerry Landry "ama-Amazonas" ezinye zeempahla zomculo zecalin zase-latin zazingenazo i-buzz kubo, phantse ukuba ziphukile. Nangona kunjalo, uluhlu oluphezulu lwe-LP-2020A + luvakala ngokungakumbi, njengoko imilinganiselo iphakanyisiwe; I-TP30 izandile zincinci xa zihamba ngokuthelekisa. Kodwa i-bass, eneempembelelo ezinamandla ezithi "I-Tongue yeNgoma" kaHolly Cole yavakala kakhulu kwaye yayingaphantsi kwe-TP30.
Ngokubanzi, ndingathi i-TP30 izandile kakuhle, nangona zombini unamandla kunye nobuthathaka. Ndicinga ukuba abanye banokukhetha isandi se-LP-2020A +. Kwaye ndicinga ukuba abanye abanokungaqapheli.
Igama lokugqibela
Kubonakala kwimilinganiselo yam i-Topping TP30 yinto endiyayibiza ngokuthi " real amp ": Unokuyixhuma malunga naliphi na isithethi kwaye iya kuhambisa izinga lokuphulaphula elifanelekileyo kunye nesandi esicocekileyo.
I-Lepai LP-2020A +, nangona kunjalo, ibonakala ifaka iinguqu zengunjineli ezivumela ukuba ithabathe ixabiso layo elisezantsi. Yenza ngokusemthethweni inani elifanayo lamandla kumthwalo we-8-ohm njenge-TP30 ye-4x-more cost-cost.
Nantsi isincomo sam: Yenza i-TP10-MK4 ukuba ubeka ndawonye inkqubo ephathekayo yomsindo okanye indawo yokulala-bhajethi okanye indawo yokulala. Fumana i-LP-2020A + ukuba ufuna nje into eyenza isandi esivakalayo, njengendlela yegaraji okanye ukudlala i-lite jazz kwigumbi lokulinda.