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About This Sound Room

Announcements, special offers, and discussion about fine products for audio enthusiasts made by Ten Octave Audio. Welcome from fxbill and iamjohngalt!

  1. What's new in this room
  2. Since there is not a kit build being planned for CarverFest 2019, fxbill and I have been discussing offering a kit of our Ten Octave Audio LP-1 tube preamplifier at the CarverFest in September if there is enough interest. We can put together a kit of the standard LP-1 that should be built with basic soldering and mechanical skills in less than 2 days. We would provide the silk-screened steel chassis, silk-screened anodized aluminum faceplate, pcb, top grade tubes, hardware(screws/nuts/washers), electronic components, switches, controls, solder, all other parts needed, a shipping box, and instructions. We would also be on site for 3 days to provide build assistance. The price of the basic LP-1 kit (available for CarverFest only) would be $699.99. (Retail is $999.99.) We are not selling kits except for Carverfest. We may be able to also offer an LP-1R kit which would include a remote control (power and volume control.) We have a working prototype of the LP-1 with remote but we can't guarantee the availability of the remote kit for CarverFest yet. If we can make it available the price for the LP-1 remote kit will be $799.99. (Retail will be $1,199.99.) We would need 50% of price prepaid by July 10 and balance due by August 15, in order to get all parts ordered, assembled into kits, and delivered on time to CarverFest. If you are serious about wanting to build your own Ten Octave Audio LP-1 Tube Preamplifier at CarverFest 2019 please respond at: as soon as possible. Hope to see you at CarverFest 2019
  3. If you are in the Philadelphia area and want a listen to this preamp, I will be hosting an audio meet on June 15th from 10 to 5 at 100 Frontage Rd. Cherry Hill, NJ 08034.
  4. @DaddyJT "Can you share the impedance of the volume pot? Remote volume is a deal-breaker for me, and curious of the possibility of modding it..." × Hi.... We use the ALPs 20K although we have also used a 100K with good results as well, although the 100K is a bit more sensitive at the bottom end and the 20K seems a bit more linear...no difference in sound though...only in the volume settings for the unit. We already have a remote kit that can easily be added to the unit and quite possibly our next model will include it, but the power transformer I had custom built for this unit already has extra taps at 6v, 9v and 12v for adding any options that might be needed. The remote we found has power on and off, mute and volume. It already has the motorized ALPs pot on it and it fits perfectly into our face plate. It requires 5 volts to run it and the 6 volt tap from our transformer will work perfectly since the remote board already has a 7805 5 volt regulator built in. The only thing that needs to be changed aside from the volume control is the main power switch that we have. It needs to be changed to a momentary switch instead of a latching switch. Fortunately we planned ahead on this and the switch we use is already available in both latching and momentary. Change that out and add the remote kit and one power relay which is controlled by the remote board (the relay costs less than $10) and there you have it. Easy squeezy. I'd estimate several hours to do the complete changeover.
  5. Can you share the impedance of the volume pot? Remote volume is a deal-breaker for me, and curious of the possibility of modding it...
  6. Kevin’s review is spot on! I am blown away every day with the lp-1 and cf275 combo. I am also using an ELAC PPA-2 phono stage with my Technics mc310 cartridge on my sl-7 turntable. Closing in on audio nirvana! barry
  7. More rave reviews: member in Illinois, "Sounds great.. Have the factory 12AX7s in the 350s and its very nice. Enjoying the hell out of it!" member in Arizona, "I installed it in a test system and it sounds great." Thanks to everyone for all your kind words. If anyone has questions post them here or if you prefer send me a private message. David
  8. Because of the delays we experienced with some parts and shipping boxes our initial sales got off to a rather late start...half way through the 1 month sale originally planned. I have convinced JG to extend the sale for another 2 weeks....until the 15th of April to make up for the 2 weeks of lost time at the beginning of the sale. Either JG or I can be contacted for more information. Thank you for the support we have so far received! FXB
  9. Because of the delays we experienced with some parts and shipping boxes our initial sales got off to a rather late start...half way through the 1 month sale originally planned. I have convinced JG to extend the sale for another 2 weeks....until the 15th of April to make up for the 2 weeks of lost time at the beginning of the sale. Either JG or I can be contacted for more information. Thank you for the support we have so far received! FXB
  10. The Alps pot you're looking for is the 27mm Size Metal Shaft Type RK271 Series ALPS and is available in many resistance values. We have used both the 20K and 100K and had excellent results with either. Do not order the stepped fixed resistor ladder type that you can get on eBay for about $6. The steps were too wide apart for our purposes and it was not always possible to get the exact volume that we wanted with it. One step might be too low and the next step would jump to being too high. It might work just fine for your use though. The ones we use cost about $10-$15 on eBay and there are only a few sellers in the US who stock them. Most sellers have the cheaper stepped units. They look very much alike, but the stepped units usually have a fixed loudness tap on them giving them 4 terminals for each section. They're still quality pots, but lack the flexibility of the infinitely variable Alps which only has the normal 3 terminals per section. There are also fake ones out there that are not truly made in Japan. Check feedback on whoever you purchase one from! We order ours directly from the manufacturer to ensure that we have the real deal. We do have some stepped units here that we originally purchased since I normally like fixed resistor "ladder" typed volume controls. We can sell you one at cost if you think you'd like to try one. It might be fine for your purposes.
  11. Sweet offer indeed not a chance un hell here but no doubt some will nab some up! Not enough exp here with tubes to comment anyhow with any degree of authority. (rarely ever had a chance to deal with such since I was a kid and that was looong ago) That said q,,, what model of Alps r u using? looks like i need to build anuber basic preamp aka volume only here for a friend with budget of near zero (higher than mine still! lol).. figure might as well inquire as it might be a viable idea.
  12. I also have a rebuilt Exposure VI and VII that I use only as a phono pre amp, that I will be using into one the auxs. Will also let you know how it sounds with my Thorens 160 super
  13. I think you'll find that the silver anode 6N2's are going to sound as good or better than any 12AX7 you can sub in it, but I'll be very interested in hearing what your experiences are! They have a lower floor noise and lower microphonics of most 12AX7's and are rated at up to 10K hrs of use. The bottom end is also supposed to be better as well. The single 6N1 can be directly subbed with a 6DJ8. We tried several brands including Bugle Boys and the 6N1 sounded better...( to us anyway). Interesting thread here...... https://www.diyaudio.com/forums/tubes-valves/65548-6922-vs-6n1p-bass-response.html
  14. Ordered and I look forward to getting it in 2-3 weeks and will give you a review of how I like it w/ the 350s in 4-6 weeks if anyone is interested. I'm not going to use the 12s and adapter, will use it stock with Olivia and Sheena (the 350s) and see how they like it.
  15. The C-1 is excellent, has lots of features, I have a c-1 as backup. I find I never use SH as I have Polk SDA’s and almost never have used tone controls. The ten Octave unit is Bare bones, which is why I like it. You need to consider if you run vinyl a phono stage will be needed. I am enjoying my Ten Octave very well, it’s a superbly made, well crafted instrument! barry
  16. I would also like to be in on this and have sent a pm. Planning on using it with my 350s. heard the praise on the 275s running it so it should be similar. I was thinking of getting a C1 and having it upgraded but this looks like the way to go. Thnks so much for offering this. Mark
  17. Hi, B-Man, Frequency response 20-20,000 Hz +-3db Schematic is being updated for publication with a users manual. Power switch controls power to the transformer, so off is off.
  18. Nice job guys !! Looks to be well built and if Travis is enjoying it so much it makes me curious. Any measurements / specs you can share ? Is a schematic available with purchase ? Is it a "real" power switch or is the unit on all the time ?
  19. I just started a thread about these adapters and their use that includes some info about the 6N1 and 6N2 tubes and rolling tubes in the preamp.
  20. I use a set of these adaptors in my 2011 Carverfest tube amp in order to use 12AX7 in lieu of 6AX7/6N2 tubes without rewiring the pin sockets. They work great!
  21. There are adapters available to allow extensive tube rolling the the new preamplifier. They're available on Fleabay for a nominal cost. These adapters can be used to roll 12AX7's in place of the 6N2's and/or to use12AU7's in place of the 6N1 tube. Our preamp case height was specifically designed to allow room to use these adapters without any height restrictions placed on them. Also...in most cases the 6DJ8 can be used as a sub for the 6N1 directly although the gain is slightly different. In these cases with the 6DJ8 or 12AX7's and 12AU7's ( with adapters ), it's all subjective as is the case with all tube rolling. To each his own although we have tried many combinations with excellent tubes and brands and have both felt that the "EV' or "EB" series 6N1's and 6N2's have a better sound than anything else we've tried....and the prices on these is far less than on most other tubes since they can be purchased from Russian surplus dealers. Just make sure that you insist on the "EB" or "EV" suffix to the tube. They are the extended life...( greater than 5000 hours and greater than 10,000 hours in some cases ) and the ultra low floor noise level and low microphonic models. They are extremely quiet with exceptional tonal qualities. The "OTK" printed on the tube signifies the quality control "stamp of approval" signifying that they were approved for military use and are of the highest build quality and specifications. Silver plated anodes and triple mica units are the most desirable, but also a bit more costly and harder to find. ( When I say more costly...they are still far below the price of any quality 12AX7 you can purchase...less than $10 per tube in most cases and as low as $5 per tube in some cases. )
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