Posted 24 February 2012 - 05:26 PM
Would these amps be overkill foe a pair of HD414s
Which 414s? There have been several different versions over the years, all with different impedances and sensitivities.
The later versions are 52 ohms and don't have the sensitivity quoted in the specs AFAIK. I'd expect something in the order of mid 90's dB for a 1mW input.
I know my old ones are 600 ohms. They don't give much grunt from most headphone outputs on CD players and the such like. I found them to perform much better on headphone amps that can develop a larger output voltage.
Must check if they still work and get some new foam pads for them. Believe it they still have them as a spare part but I've only found the yellow ones, not the nice blue ones.
(Posted from the Qantas Club Lounge - Brisvegas)
Amplification: ME-850HC power amp, Sony STR-DA5600ES receiver, Sony TA-P9000ES pre-amp, Sony TA-N9000ES x2 power amps, Sony TA-E9000ES pre-pro, custom analogue buffer / switch, custom RIAA pre-amp. Sources (digital): Sony SCD-XA5400ES SACD player, Sony MDS-JA3ES minidisc deck, Tascam DA20 Mk2 DAT deck, Philips DCC900 Digital Compack Cassette deck, Sony BDP-S370 Blu-ray player, Sony PS3 slim, Pioneer DV-S838A DVD-Audio player. Sources (analogue): Technics SL1200 GLD turntable, Tascam 42B reel to reel, Sony TC-K570 cassette deck. Speakers: Quad ESL2905 (fronts), KEF Q75 (rears), Richter Odin (sub) & Unicorn (centre). DACs: CEC DX-71 Mk2, Emotiva XDA1. Cartridges: Shure V15 type 3 (MR stylus), Shure V15VxMR. Misc: dbx 119, Aurex AD-2 noise reduction system, Sony SQD2010 SQ/QS quad decoder, JVC 4DD5 and Pioneer QD-240 CD4 demodulators, VPI record cleaning machine.
Computer room system: Sony STR-DA5200ES receiver, Boston Acoustics CR9 speakers, Technics SL1200 (original version from the 70s)
Semi retired gear: Equinox Audio Jupiters, Sony SCD-XA333ES SACD player, Philips DCC130 portable Digital Compact Cassette player, Sharp Minidisc portable, 250W + 250W monoblock power amps.
Retired gear in storage: Sansui AU-417, Sansui TU-417, Richter Wizards, KEF Concerto x2 pairs, Sony ST-JX741 tuner, Sony CDP-338ESD CD player, Yamaha CA700 integrated amp,Tascam analogue mixing desk and a lot more other stuff than I care to list (mainly video)