Main System
Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & reg mods]. Funk Firm APM Achromat/Nagaoka GL-601 Crystal Record Weight/Isonoe feet & boots/Ortofon RS-212D/Denon DL-103GL in Denon PCL-300 headshell with Funk Firm Houdini/Kondo SL-115 pure-silver cartridge leads.
Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp/Denon AU-310 SUT.
Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.
CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.
Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new, by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.
Preamps: Heavily-modified Croft Charisma-X. LDR Stereo Coffee. Power Amps: Tube Distinctions Copper Amp fitted with Tungsol KT-150s. Quad 306.
Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.
Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.
Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.
Protect your HUMAN RIGHTS and REFUSE ANY *MANDATORY* VACCINE FOR COVID-19!
Also **SAY NO** to unjust 'vaccine passports' or certificates, which are totally incompatible with a FREE society!!!
Main System
Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & reg mods]. Funk Firm APM Achromat/Nagaoka GL-601 Crystal Record Weight/Isonoe feet & boots/Ortofon RS-212D/Denon DL-103GL in Denon PCL-300 headshell with Funk Firm Houdini/Kondo SL-115 pure-silver cartridge leads.
Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp/Denon AU-310 SUT.
Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.
CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.
Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new, by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.
Preamps: Heavily-modified Croft Charisma-X. LDR Stereo Coffee. Power Amps: Tube Distinctions Copper Amp fitted with Tungsol KT-150s. Quad 306.
Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.
Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.
Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.
Protect your HUMAN RIGHTS and REFUSE ANY *MANDATORY* VACCINE FOR COVID-19!
Also **SAY NO** to unjust 'vaccine passports' or certificates, which are totally incompatible with a FREE society!!!
In this case I'm safe as houses
Current Lash Up:
TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.
Location: North Island New Zealand
Posts: 1,757
I'm Chris.
Hi Chris
But not all sounds recorded were via microphones, Keyboards and synthesizers possibly had some output at those frequencies
where connected directly to a recording device. Sadly mixers would tend to limit upper frequencies, but also adding frequencies of
their own.
Without researching every instrument used by every band in every recording capable of having frequencies above 20khz that might or could have been recorded directly - now there's a task for a Sunday afternoon just after a good lunch and a quick read of Three words daily to
prepare one's self , evidence points that the recording devices were capable. Here are graphs of 15ips tape machines frequency response, http://www.endino.com/graphs/ quite a few showing rising frequency response above 20khz. a 30ips would improve further. A Neumann VMS70 lathe used in direct to disc recording its SX74 cutting head had frequency capability of minus 3db at 25Khz
Adding to the complexity of discussing frequency is of course speed stability and phase coherency. It is perhaps where these
attributes of a recording are attained, that frequencies above 20khz become possible to preserve correctly.
And there is always the future, where 50khz recording devices can be used.
Cheers / Chris
But this overlooks a fundamental which is that we can't hear these frequencies. The idea that frequencies above 20Khz affect how we hear frequencies that are audible is, as far as I am aware, idle speculation/clutching at straws. If anyone has a link to something suggesting otherwise please post it.
Current Lash Up:
TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.
Location: North Island New Zealand
Posts: 1,757
I'm Chris.
See Post 124 and this article http://wilson-benesch.com/reviews/Li...C_Sep-1998.pdf
the work done by David Blackmer into the ability of human hearing to perceive sounds above 20khz
Yes mixing desks are capable of limiting frequency, and must be improved. On the plus side fets and mosfets
are capable out to 100's of Mhz if not Ghz
It open's many possibilities when we think above 20khz for both recording and playback.
Not a lot of people know this... (and I only said to blow the bloody doors off!) but phase changes begin to have an effect around 10 times earlier in frequency (at both extremes) than amplitude. This is one of the reasons I usually produce kit with <1Hz - 200KHz+ type frequency responses.. Also the ear is far from linear and can produce intermodulation distortion so, if we have two frequencies of say 24KHz and 26KHz there will be some 2KHz and 50KHz produced
Arkless Electronics-Engineered to be better. Tel. 01670 530674 (after 1pm)
Modded Thorens TD150, Audio Technica AT-1005 MkII, Technics EPC-300MC, Arkless Hybrid MC phono stage, Arkless passive pre, Arkless 50WPC Class A SS power amp, (or) Arkless modded Leak Stereo 20, Modded Kef Reference 105/3's
ReVox PR99, Studer B62, Ferrograph Series 7, Tandberg TCD440, Hitachi FT-5500MkI, also FT-5500MkII
Digital: Yamaha CDR-HD1500 (Digital Swiss army knife-CD recorder, player, hard drive, DAC and ADC in one), PC files via 24/96 sound card and SPDIF, modded Philips CD850, modded Philips CD104, modded DPA Little Bit DAC. Sennheiser HD580 cans with Arkless Headphone amp.
Cables- free interconnects that come with CD players, mains leads from B&Q, dead kettles etc, extension leads from Tesco
That's not the same thing though is it? Isn't it the case that most amplifiers are not bandwidth-limited is not because we can actually hear anything at that frequency but for other reasons unrelated to audible frequency reaponse?
Current Lash Up:
TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.