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AbsolutK

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  1. View Classified Allo Shanti Dual 5v Linear Power Supply (Regulated, Ultracaps) A long time Allo fan, I bought two of these supplies thinking one will go to my DIY projects. DIY hasn't gotten touched in a while, so trying to find a new home for the second unit. Additional USB C and uUSB adapters included as I have plenty from other Allo supplies. Listing as Used even though it is practically new. $160 incl. shipping and PayPal (it is $196 shipped from Allo). Thanks! Seller AbsolutK Date 08/01/20 Price 160.00 USD Category Power Supplies / Power Products  
  2. Time Left: 22 days and 14 hours

    • FOR SALE
    • USED

    A long time Allo fan, I bought two of these supplies thinking one will go to my DIY projects. DIY hasn't gotten touched in a while, so trying to find a new home for the second unit. Additional USB C and uUSB adapters included as I have plenty from other Allo supplies. Listing as Used even though it is practically new. $160 incl. shipping and PayPal (it is $196 shipped from Allo). Thanks!

    160.00 USD

  3. Oh yeah - that looks suspiciously similar! Nice catch
  4. Happens to the best of us! What I believe the author of the quoted post was trying to say is that analog sections are often powered by +/- 15v rails. The SHD very well might also (doing its own regulation from 24v to 15v on board).
  5. @audiobomber I measured the harness with a DMM to confirm that 24v was being output by the PSU. On the main PCB there might be a network of LDOs in the power path that drops it to a +/- 15v rail.
  6. Thank you! Sadly I never got around to the PSU upgrade because I sold the SHD a few months later. I found another product that fit the bill - the Micromega M-One (M150) - that included a *very good* 150 wpc Class AB amplifier. At ~$7k new ($4k used), it was a no brainer to replace 2 boxes (one of which was big) with one. I would later go on to selling even the Micromega, to have a simple system where a Chord Hugo TT2 drives my speakers directly with its 7wpc!
  7. I posted this over in the official TT2 thread at Head-Fi, but since the inspiration for much of this came from @ray-dude here, it's more fitting to share here also: I traded in my Micromega M-One M150 and sold my pair of Magico S1 to try the Hugo TT2 + sensitive speaker route. Placed an order for a pair of Omega Super Alnico Monitors (Louis suggested I go with the standard, not High Output version, if what I like is imaging and accuracy), with Zenwave internal wiring and a pair of Sound Anchors. However, till the speakers arrive, I have my friend's pair of Avalon Acoustics IDEA loudspeakers (which I need to list for him!). I created a pair of RCA<>binding post adapters (can post the tutorial if someone is interested) using the extra Furutech FT-867 binding posts I had from my DIY days and hooked up the IDEAs using a pair of Sablon Audio Panatela cables. Yes, I am using just the 7wpc available through the RCA. Rated nominally at 4 ohms, and a sensitivity of a lowly 88 db/w/m, I wasn't expecting much from the IDEAs plugged into the TT2 directly, but BOY was I wrong. Wowza. I've never heard my setup sound this transparent and neutral. I'm constantly between -15 and -5, volume-wise and will rarely go above +3 (when watching TV). I am not listening to music on low, quiet volume, mind you - this is at a point where I can't have a conversation without raising my voice. The IDEAs are augmented with a REL Carbon Limited (high level), and I can't tell where the speakers stop and the sub picks up. I didn't have this level of seamlessness with the Micromega. Now I'm a bit bummed for having sold the Magicos because I really really REALLY liked their sound (the Avalons have a bit of a mid bass bump), and at 87db/w/m, would not have taken much away from the system at the volumes I listen to it at. Against Chord's recommendation, I decided to try a pair of 15v Farad Super3 on the TT2 and M Scaler. They got delivered today. While the TT2 sees a marginal benefit (I will report back when the Farads have broken in a little), the HMS steps into a different league. There is far more channel separation with instruments and vocals finding their place and staying solidly there. I also received my ferrites today and will be clamping them on to the Silver Dragons. By the way, the Chord units sit side by side on an HRS M3x. For background, in recent years my amplification has included the Devialet D400, DIY gear (including Neurochrome Modulus-686), and the Micromega. I've tried the XTZ Edge A2-300, and as well heard my friend's Gryphon Diablo 300 quite a bit. My source has moved from an Allo Katana (DAC) to an Allo DigiOne Signature+USBridge Sig to ultimately a NUC7i7 in an Akasa fanless case running Euphony. My friend's Lumin U1 had made a brief appearance along with the grossly mismatched (price-wise ) Nordost Odin SPDIF cable. The server, an M.2 drive-using NAS by QNAP (TBS-453DX). USB comes by way of an Uptone ISO Regen and ethernet from an EtherRegen. All of this powered by 6x Farads plugged into an Isotek Aquarius (which incidentally has 6 outlets). I wish I could have gotten a pair of the Zeths + Z Bass. But since I just got the Carbon Limited and all of this Chord gear, perhaps that's a treat for when the world is better :). Just some anecdotal info for anyone thinking of trying this route based on this thread's info!
  8. 😮 Watching this with great interest. I've been using a DigiOne (base) with my Micromega M150. The sound is alright. Then this weekend, my friend brought over his Lumin U1 Mini with an external LPS, and my jaw dropped. I could simply not fathom what this amplifier+DAC was capable of. Sound coming from places I had not heard before. We ended up moving the speakers about 12" apart to take advantage of the separation. Just too musical to want to hit "next" on the track. This friend also auditioned the dCS NB and wishes to get one, convincing me that that's the way to go. But I'm not feeling exactly flush with $$ with now, and if Shanti + DigiOne Signature even remotely plays in this weight class, then this is a game changer.
  9. Hello @Allo or any other fellow member who might have the answer to my quick question: Does the DigiOne Signature work with the Allo Sparky? Or is it limited to Raspberry Pi only? Thanks!
  10. Thank you! As smolteni points out, this is easy to do in Dirac in the step after taking measurements. You drag the “active” window from the right. Here’s a screenshot I stole off the Internet showing what it will look like after. If you can’t move it left, it is because there’s a marker for where you’d like the target curve to be. It’ll be a yellow diamond on a yellow curve. Double click the diamond and that will unblock the window resizer.
  11. The PSU is 85W without the heatsink, so it should mean 24V 3.5A, which should easily be possible with supplies like these: https://www.ebay.com/itm/100W-Ultra-low-Noise-100VA-LPS-R-core-Linear-power-supply-DC-5-24V-Optional/133061111162 And then, yes, a 5V supply, which are also easily available. I've been following the threads on Allo's new 5V supply, Shanti, and reports are terrific. As for connector, both the 24V as well as 5V is provided through a harness. I would recomment keeping those intact and making your own harness end-point for the supplies. Note that the 24V supply is dual, so either you jumper the positives and negatives to supply them from a single 24V source, or you find a dual 24V source (it may be designed in dual mono, who knows). I suspect the former is simplest and best though. I recently acquired a Micromega M150, so sold the MiniDSP, so sadly no more experiments from me.
  12. Thanks! I have not managed to do the linear power supply mod just yet. Life has been far too busy! Yes, the unit is used as a preamp powering my DIY Neurochrome power amplifier. The volume control is great and the remote for this works perfect, giving the ability to switch between Dirac on/off and 4 profiles on the fly. Though, I suspect this is the same as the Studio.
  13. I have been wanting to tame a few room anomalies for quite some years now. My source/amplification is a super-integrated DIY (Allo Katana DAC stack, 2 stereo amplifiers and all related power supply). I don't have very many options for DSP, let alone DIRAC. So when I saw the MiniDSP SHD, and amirm's measurements over at ASR, I was sold. It was icing on the cake to learn that Tom from Neurochrome had designed its output stages, whose amplifiers I'm using for my current build. There's not much on the internet regarding this device, what's inside, what's good and bad. So I'll try to cover my observations in case they help someone else. Ask away, if you have any questions and I'll try my best to answer! Competition Based on this thread and Dirac's partner page, these are the SHD competitors. Anthem STR Preamp …$4k! Proprietary Room Correction (ARC) instead of Dirac. Has phono and 4 channel out. This is designed as a preamp (instead of a processor) and is closest to what I'd consider instead of the SHD. Nice official video as well as one by Audioholics on the STR product range. NAD C658 …$1600. This is the closest competitor, but is 2 channel only M17 …$4k+! Arcam None. The AVR series are receivers, full with amplification. Datasat R20i. No balanced out (perhaps there's a daughter-card) …$6k+! Emotiva XMC-1 (now XMC-2) …$3k! RMC-1 …$5k! Theta Casablanca IV …$10k+! Part 1 - Unboxing The package is delivered in 2 boxes - a) the SHD alone and b) the accessories and the UMIK. It was nice to see a large (albeit flimsy) tripod included. Some nits: There is no printed manual in the box. It is linked on the product page, but not under "Support", which is odd. Despite being called out on page 26 of the Manual ("A short Ethernet cable is provided with the unit"), there is no ethernet cable included. This is not a big deal. There are no batteries included for the remote. This is not a big deal either. The included large tripod is rather flimsy. But it's there and it's useful, so that's nice. Part 2 - Physical, External The chassis itself is quite sturdy. However, it is lacking weight - from the chassis itself, or from components inside. As a result, the box resonates quite a bit when you tap it. You may have to put damping weight on the top to make it not resonate. I opted for the SHD (over the Studio) just for versatility. Having an on-board ADC and DAC allows me to use this device both as a Studio as well as, in a pinch, a full-fledged streamer. Notes on the DAC are below. I do not have use for the ADC section anytime soon. At least not until there's a Phono program included ;). Starting from the left, the connectors are as below: Fused, switched IEC inlet. This connects to the SMPS power supply inside (more on that below) USB Host and Ethernet port. This connects directly to the streamer module inside. I have not used (and don't intend to use) the USB Host. SPDIF (RCA), Toslink and AES/EBU ports for digital input RCA and XLR connectors for Single Ended and Balanced analog inputs. There are only two channels (L and R) This goes to the ADC stage RCA and XLR connectors for Single Ended and Balanced analog outputs There are four channels Behind the scenes, the Single Ended conversion/output is from a secondary board. Part 3 - Physical, Internal Main board The first reaction to seeing inside is - wow, that is neat and clean! The board is marked "DDRC44 main" "Ver 1.1" and the date "May 10, 2018". There is no DDRC44 product in their range, proving this is truly a custom design by MiniDSP rather than a bunch of existing products cobbled together Lots of LDOs Lots of isolators Streamer board This SBC is rather small. Seems even smaller than a Raspberry Pi Zero USB Host and Ethernet jacks go straight onto this SBC There is no isolation on Eithernet, so you'd benefit from using FMCs A micro SD card is inserted and kapton taped shut. Presumably this is where the Volumio build sits An unused Micro USB port is to its left, presumably for diagnostics There is a 7-wire harness that connects the streamer to the main board. Is this I2S perhaps? DAC Yes, it uses the AKM4490, a ~5 year old DAC Yes, there are two discrete DAC chips Power seems to be well thought out. The caps can likely be upgraded. Power Supply The IEC inlet links to a switching mode power supply Uncooled (which this is), it seems to be rated at 84W (24v, 3.5A) The harness from the PSU to the main board uses two pairs of wires. Why, I'm not sure. The output measures 24v on the harness. This is being stepped down on the main board to provide 5v to the streamer section via a 2-wire harness I might bypass the PSU as well as onboard step-down, and replace the IEC inlet with two DC barrels for 24v and 5v Part 4 - Usage Streamer Instructions to follow (and as documented) are quite simple. Plug it into Ethernet, and point your browser to minidsp-shd.local. This is the same as using Volumio on any Rpi based solution. Volumio has been customized with a branded look and feel (background, colors) and locked menus (removing those that are not applicable) http://minidsp-shd.local/dev also works, allowing SSH access. However, I do not know the username or password. If someone knows this, I would love to know in the comments. I had trouble getting the unit on the network at my home as well as my friend's. Going through hubs or FMCs may not always work, but connected straight to a router seems to do the trick. Software There are two distinct pieces of software involved: The MiniDSP controller. Used to communicate with the SHD over USB The Dirac Live Calibration tool. Used to take measurements and generate the filter to be uploaded. All software is nicely zipped up and hosted, and a link is sent via email to purchasers The Dirac app does not work with the SHD. There are indications that v2 is in the works, which might enable the app experience. Measurement notes Note: two unused USB ports are needed - one to connect to the SHD and the other for the Mic. Out of the box, there is about 8ft of USB cable, but you can always sit closer to the listening area and plug in the SHD to a nearby outlet during measurement. Documentation on measurements is great and easy to follow. Dirac will let you proceed with only one reading, without warning you. The only indication that there are more measurements remaining is subtle - dots that have not yet turned green. Make sure you take all 9 measurements before proceeding It is not immediately apparent that you can limit the window of frequencies to which correction applies. There is an "anchor point" close to each edge of suggested curve, and the correction window slider will not go past anchors. You need to double-click the anchor points in the region you wish to leave untouched, then slide the window over. Listening notes Without Dirac The DAC warms up nicely in 10-15 mins It sounds quite nice, and comparable to the Allo Katana stack I have in my setup. When heard on my friend's Gryphon Diablo 300, too, it sounded convincing However, compared to the Gryphon DAC module (ESS9018) the higher frequencies were lacking detail and was fatiguing to listen to. Granted, the Gryphon's DAC is a $5k+ module, but this did prove, that the streamer is quite good. We used Airplay. This might be due to the power supply. I shall upgrade and report back. With Dirac Applied to the full spectrum, the system sounded really bad. High frequencies sounded sharp and robbed of air, dynamics, imaging and magic. Limited to 1 Khz, things were much better. Better control over bass. My 44 Hz peak is happily tamed. Note: Room Correction addresses the speaker/room combination, and it addresses all issues at once. You may have liked some of these characteristics, but there is no way to isolate them without either advanced analysis, or trial and error. In my system, the bass sounded drier. I'm trying to re-insert some of the peaks to see if I can get that "moisture" back and will also try limiting the correction to 500 Hz. Delay/sync Some have asked the question about delay when using in a video setup. I am happy to report that there is no noticeable delay of the audio stream when compared to the video using Volumio's Airplay receiver functionality. You can configure the Apple TV to use Airplay speakers, and Volumio powering the SHD has this functionality built in. The delay is likely compensated for in the Shairport Sync library.
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