- 2,054 Posts. Joined 11/2002
- Location: Tokyo
- Select All Posts By This User
Recent Images In This Thread
Related Forum Threads
- Delivery times, BHSE, Cavalli LL Mk2, EC Electra, Woo WES and "customer service". Last post on 7/13/14 at 7:06pm in High-end Audio Forum
- Please share your BEST SQ DAP or DAC / Amp.combo for I Device and Android as SOURCE For Desktop... Last post on 11/3/13 at 11:14am in Portable Source Gear
- DAC for SR-009/BHSE Last post on 7/24/13 at 6:05pm in High-end Audio Forum
- Stax SR-009 - Which Stax Energiser Amp To Pair With? Last post on 9/10/12 at 11:07am in High-end Audio Forum
- iTunes encoding changed over the years/versions? Last post on 9/22/12 at 4:59pm in Computer Audio
Head-Fi Buying Guide (Over-Ear Headphones) 3
Last edited: Today
- Head-Fi Buying Guide (Ultra-High-End Headphones (Summit-Fi))Last edited: 7/21/14
Beats, the biggest headphone brand in the world, selling more headphones than any other by a large margin and with a huge 60% market share in it's domestic market in the USA, has largely been the...
Though these are by no means perfect headphones, their price and excellent bass make them one of the best headphones you can buy for under $200. These headphones are very fun to listen to. They...
Since this is a IEM review I'll keep it short , I have no respect for IEMs ...I wish I could use headphones in the bed but since I cannot I have to resort to IEMs , not a IEM guy I picked...
I'm not much of a audiophile nor a reviewer just a regular audio enthusiast.. Apologies & correct me if I'm wrong.. Absolutely "StUnNeD" by these gems thought of sharing my...
Right have the pleasure of owning these for about 4 months. My Kit: Source: Foobar through Cambridge Audio Dacmagic Amp: Lehman Audio Blackcube Linear Headphones: Audio Technica ATH W...
- Head-Fi Buying Guide (Ultra-High-End Headphones (Summit-Fi))
Amplifiers shootout for Stax 009 (Eddie Current Electra, AudioValve RKV + WooAudio Wee, Stax... - Page 5
Gear mentioned in this thread:
I'm listening right now to 009 + BHSE + D1 Dual and if anything can get better than this, I think my head would explode.
My big issue now, evaluating the TotalDAC, is the the digital volume control has to be set at -30dB or lower feeding my VTL amps to Nola speakers.
The digital attenuation kills the magic. I tried comparing 0dB attenuation in DAC + BHSE vs. -28dB attenuation in DAC and more gain in BHSE and it was no contest. The BHSE attenuator is much superior to digital volume control at those levels.
I'm trying to find a way to keep Vincent's DAC but I don't use a pre-amp (or want one) and the digital volume control is a roadblock for me.
p.s. If the T2-like is really noticeably better than the BHSE, I don't want to hear it! These *&! head-fi meets have already cost me much more than I ever anticipated
Congratulations on your very good audio system (Japanese estat, American amp, French dac).
What wonderful production of High-end Hi-Fi material !
Listening, yesterday evening, the 009 + RKV amp (without Wee 1:50 voltage transformers) + Dac Audiomat Maestro Reference (*) + Audiomat D1 Drive is not bad either and if anything can get better than this, I might lose a very good bottle of Bordeaux...
(*) French dac (Audiomat), also : http://www.mutine.com/Fiches/Mutine_Fiche_Audiomat_Maestro_Reference_En.pdf
as Totaldac D1 Dual : http://www.totaldac.com/REFERENCE-D1-eng.htm
Edited by eric65 - 2/24/14 at 6:26am
I know I was switching between 3 stax amps in a not so scientific pattern (SRM1MK2, 727 and 424 was it?)
I could barely hear a difference in general between amps that ranged $500 from each other.
Then I tried my friend's custom amp and it improved tenfold compared to the tiny bit of little improvement the 727 was able to bring over the others.
New Energizer AudioValve for Stax Headphone (Prototype)
Link constructor for specification http://www.audiovalve.info/rkv/audiovalve%20rkv%20mark2.php
and some comments on HCFR : http://www.homecinema-fr.com/forum/post178189300.html#p178189300
Edited by eric65 - 7/19/14 at 12:23am
Here is the latest information (with specifications in English) produced by Mr. BECKER (rkv father) of AudioValve Germany on its box adapter VERTO (necessary to operate Stax Headphone with the RKV (OTL) amp, but also with orthodynamic and electrodynamic low impedance headphone, with the highest quality of sound reproduction that is).
" Description (VERTO)
The passive box can be used together with AudioValve RKV II and RKV III tube based headphone amplifiers. There was a simple idea behind the VERTO. Why not use the transformer in step up mode to produce the high voltage for the STAX electrostatic headphones? The RKV models use one transformer per channel (impedancer) to drive low impedance headphones (< 100 Ohm). In the RKV III the transformers are mounted inside the case, for the RKV II the impedancer can be bought as a separate box. RKV II and III are regarded to belong to the best sounding headphone amps regardless of price, see many reviews all over the world.
For a game changing product a simple idea is not enough, you have to find also a proper implementation. There are already promising approaches in the market combining transformers with headphone amps to drive STAX headphones. But RKV and VERTO are now exploiting the full potential of that approach. Inductance and capacitance of the transformer can harm the sound. The Pikatron output transformers we use have only very little stray inductances and capacitances. To avoid distortion we use only a low step up ratio of 1 to 5. But key is the fact that the output impedances of RKV II and III are extremely low, too low to cause any negative effect on the sound.
The VERTO supports the current STAX PRO plug with 580 V DC bias as well as the former bias of 300 V used by older STAX headphones. The higher PRO bias uses a 5 Pin connector, the 300 V DC bias can be identified by a 6 Pin headphone plug at the end of the headphone cable. So the VERTO is suitable for all STAX models.
The VERTO has is connected to the headphone amp with a phone cable and standard plug coming with the VERTO. There is nothing to buy for you in addition to the VERTO. Also the VERTO does not require a separate supply voltage. This ensures that there is no interference and hum caused by main connection. The RKV III has to be switched to the OTL mode when driving the VERTO.
To increase the versatility we implemented a switch for 8 ohm as well as 32 ohm. So you can connect high efficient loudspeakers as well as headphones with low impedance. Feel free to drive mobile headphones designed for Apple devices as well as low impedance high end planars like Audeze or Abyss. Check to drive your high efficient loudspeaker with your tube and transformer based RKV and VERTO chain!
Since the connection of the VERTO to the headphone amp is implemented via a standard phone plug you can use it also with other headphone amps instead of the RKV II and III. You will achieve very good results in the case you use a headphone amp with low output impedance and a high output voltage. We doubt that you will get to the same ultimate sonic quality as with the RKV models. The RKV II and III are able to deliver 100 volts peak-peak drive.
We use only high quality components in the box. The Picatron transformers are built based on our specifications. For wiring the main audio connections to the sockets of the headphones and the STAX female socket cable we use a well-known German high end audio cable manufacturer by the name of HB cable design from Cologne. The core of the cable is made of silver-plated oxygen-free copper conductors stranded several times.
- Compatible with all STAX electrostatic headphones (580 V DC PRO bias 5 Pin connector as well as 6 Pin 300 V DC bias)
- Suitable for low and middle impedance dynamic or planar headphones as well as ultra high efficient loudspeakers
- 3 switchable modes for STAX electrostatic mode, 8 ohm and 32 ohm
- One Teflon female jacket for STAX PRO bias 5 Pin and 6 Pin headphones
- Two Combi jackets phone plug and XLR for dynamic and planar headphones
- Loudspeaker terminals to connect spades or bananas
- 60 cm cable with phone plug fixed to the case for connection to the headphone amp (like Audio Valve RKV II and III as well as other headphone amps with low output impedance and high output voltage)
- No separate supply voltage needed, static high voltage is generated by the signal
- One high quality Pikatron output galvanic coupled transformer for each channel
- Internal bias voltage for STAX 300 + 580 VDC (LED controlled)
- Internal HB cable design with a cross section of 0.72 sq. mm, embedded in a PTFE Teflon insulation air. The conclusion is a 5 mm diameter strong silicon of insulation, the high-voltage signal line outwards reliable and well insulated
- The device provides both the required for the operation of the headphone-static voltage of 300 / 580 VDC, and up to 550 Vrms signal voltage
- Bandwidth up to nearly 100 KHz - ( 470 pf load )
- Dimensions: w * h * d ( cm ) - 110 * 105 * 165
- weight: 2 kg
- Silver case (black on request)
- Chrome mode switch (golden on request)
- Cable with phone plug 60cm length (different length on request)
- Price: 690,- EUR including VAT "
Edited by eric65 - 7/20/14 at 11:00pm
Link to the Head-Fi Thread about AudioValve VERTO Box :
RKV - Wee moded / Verto vs BHSE (and other electrostatic amps : Stax SRM 727 ; 007t ...)
The pros and cons (discussion : french links)
- Amplifiers shootout for Stax 009 (Eddie Current Electra, AudioValve RKV + WooAudio Wee, Stax SRM727 / SRM007t2)
Gear mentioned in this thread:
- › Philips Fidelio L2 4 seconds ago
- › 2359glenn | studio 6 seconds ago
- › Band Name Game II 2 minutes ago
- › Fiio X5 Thread - info updated on Jan 17th 2014 2 minutes ago
- › Looking for smallest, least protruding IEM 3 minutes ago
- › FiiO X1, the first high-res DAP for the young ! 3 minutes ago
- › Music Game IX 3 minutes ago
- › Multi-Custom In-Ear Monitor Review, Resource, Mfg List & Discussion... 5 minutes ago
- › Schiit Owners Unite 5 minutes ago
- › 598 vs 518 - The $100 difference really worth? (open to suggestions) 7 minutes ago
- › Beats Solo 2.0 On-Ear Headphones (Red) by cb3723
- › Beyerdynamic DT 770 PRO Closed Studio Headphones - 250 Ohms by MacroPower
- › Denon Urban Raver In-Ear Headphones, Blue (AH-C100BU) by MrTechAgent
- › Audio Technica ATH-CKN50 by bharathss
- › Audio Technica W5000 by CJ09
- › Sennheiser MOMENTUM On-Ear Headphone by lofoscopico
- › Philips SHE3680 Headphones, Wired by suman134
- › Philips SHE9850 In-Ear Headphones with Advanced Acoustics by suman134
- › audio-technica AIR Dinamic Headphone ATH-AD2000X (Japan Import) by Quazimoto
- › HiSoundAudio E212 by fleasbaby
- › Audio Connections between components --...
- › Head-Fi Buying Guide (Introduction)
- › Head-Fi Buying Guide (Over-Ear Headphones)
- › Head-Fi Buying Guide (Over-Ear Headphones) 2
- › Head-Fi Buying Guide (Over-Ear Headphones) 3
- › Head-Fi Buying Guide (In-Ear Headphones)
- › Head-Fi Buying Guide (In-Ear Headphones) 2
- › Head-Fi Buying Guide (In-Ear Headphones) 3
- › Head-Fi Buying Guide (Gaming Headphones)
- › Head-Fi Buying Guide (Exercise Headphones)