Fosi za3 op amp rolling reddit forum

Fosi za3 op amp rolling reddit forum. I'd certainly do extensive testing afterwards. #2. View attachment 348770. Co-Creation Lab Where your ideas help shape the future of Fosi Audio products. The ZA3 arrives in a larger package compared to other Fosi amplifiers. Dec 18, 2023 · The Fosi Audio ZA3 is an impressive amplifier, offering high-quality sound, versatile features, and efficient operation. Fosi likely buys their op amps in bulk. I think because better performance in SINAD and ZA3 has sub crossover out of the box. $129. Noticed that my speakers supports it, now I'm wondering if I could buy a pair of bi-wire speaker Opinions on the Fosi Amps -Amazon. Dec 22, 2023 · The Yamaha is part of a long-running, venerable line of integrated amps. The ZA3 comes with swappable op-amps, letting you tweak your audio output to perfection. Adequate even without a subwoofer. - trigger in. I’m currently seeing it for $89. Profusion's price for a pair converts to $62USD which isn't far off from Fosi's price of $52USD for a pair. M. This Fosi V3 is the best of the bunch, a simple, genuinely powerful/useful, truthful, nice-looking and nice-sounding amp that can be tucked pretty much anywhere. #1. Additinal improvement is there, but more tricky. Price goes up to $109. Its more fun to listen to the music. Nov 26, 2023 · But depending on the crossover design, adding the mid and tweeter drives may bring the total impedance up to 4 nominally if all of them are driven by the same amp channel (not biamped). Feb 10, 2024 · Feb 10, 2024. It looks like the price per Muses02 op amp on Profusion's website drops to Two Fosi Audio ZA3 speaker amps with 48v PSU for bridged mono - $250 Comes with two amps, two 48v power supplies, and the original packaging. It integrates two TI TPA3255 amplifier chips mounted in DIP8, enabling it to deliver power up to 2x150W or 1x240W under 4Ω. Apr 27, 2024 · The Fosi Audio ZA3 is a decent little starter amp. It features a balanced stereo input on XLR in addition to its stereo RCA Dec 20, 2023 · The product description of the ZA3 in the Fosi Audio website has this to say about the product’s op-amps: ”Personalize your audio experience with the op-amp rolling feature! The ZA3 stocks five swappable op-amps for left and right channel outputs, balanced input, and subwoofer output. 60 USD MUSES02 - $52. Seattle Area. Jan 1, 2024 · The Fosi ZA3, in stock form, does not cast as deep a holographic soundstage as the other amplifiers, nor does it equal the articulation of the Pass DIY amp. But I can’t be sure based on the info you provided. I stuck with the PA5II powering this setup as the size is fitting and it sounds better than I ever expected. 99 on Fosi’s website and Amazon, but that’s with a 32v power supply. #62. Customize your sound like never before. Jan 24, 2024 · Ultimately, I would use one (1) 48v/10a power supply per amp AND upgrade the 48v/5a power supply for my ZA3 as well. The Fosi Audio ZA3 is an impressive amplifier, offering high-quality sound, versatile features, and efficient operation. 4 Atmos | JBL 590 (6 bed layer) Revel C208 (center) PSB Alpha P5 (4x atmos) | AMPS for TR: 2 x NX6000D + BKA-1000-4 + Crown XLS1002 | AMPS : Starke Fiera8 & Parasound HCA-855A (atmos) | 2 x MiniDSP 2x4HD | Kimber Kable 8PR | 8AWG wiring for all TR Feb 23, 2024 · Addicted to Fun and Learning. The only thing I will do going forward is install a pair of Sparko op-amps at some point and maybe get another ZA3 to run a dual mono mode configuration. To do that use the equation: watts x resistance = sqrt (x). Feb 18, 2024 · Feb 19, 2024. An unfiltered pre out is more flexible, subwoofers have their own filter anyway. 99 USD OPA2134PA - $26. 2 which I bought last month. S. Oct 10, 2023 · lazerharp said: If I understand things right, when used in mono mode it only use one channel from each amplifier. 8dB and at 20kHz it's -3. Certainly is a capable music streamer but much improved with a linear power supply. Tax included. This should also boost the value of the ZA3 amp as a PBTL monobloc amplifier for driving lower impedance loads. The range of the volume knob is more gradual with lower level sources (computer built-in sound output, Apple USB-C dongle, older LG phone with quad DAC). P. They need to make a new amp the same basic amp circuit thats the ZA3 make it full sized or like 3/4" full sized, give it 3-4 single ended inputs, a DAC section, and a remote (DAC or phono cards ala Schiit would be really, really cool to see). Feb 10, 2024 · If an amp has a gain of 20dB and a max output of 200w at 4 ohms, you would first calculate what the output voltage is at 200w with a 4ohm load. PBTL Mono Mode Support. I get the hiss when I turn the Fosi amp to maximum. This blog article/post is a deep dive into currently available 8-pin DIP dual op-amps, for those that like to swap op-amps in their designs and/or DIY projects. The Fosi Audio BT20A Pro has quite a few noteworthy features. If I were wanting to run a pair of either of these amps in "mono", I'd most likely just connect one channel without flipping the "mono" switch. fosiaudio. I ran and reran the test multiple times, same results on both amps. I would hesitate to just toss in another op-amp if I had a working design. Last edited: Dec 12, 2023. 284 volts of amp output to reach max rated power at 4ohms. Bach in the mix is important, the ZA3 has no problem conveying the excitement and drama of the DTS-X soundtrack in tandem with the Marantz. Worst case there is a low, but non zero chance of turning your amp into a power oscillator - which will do really nasty things to your tweeters, and Dec 31, 2023 · New member. #381. The only real advantage of the Fosi is the volume control and sub output. The front panel of the amp has 2 switches and a big orange metallic knob while the back panel holds all I/O connectors. Dirac Live with Bass Control (active crossover L+R+2Subs) Apr 1, 2024 · Fosi v3 mono, first product video trailer: Brilliant. a second ZA3 in mono mode. (And while the aiyima a07 max is my 1st choice, the fosi v3 would be my 2nd, before the za3). I would rank these amps as follows: MC240 > Pass DIY VFET > Fosi ZA3. I received my via their Kickstarter program at roughly $125 with the 48V power supply. Oct 10, 2023 · Around 1kHz: speaker impedance = 10 Ohms, amp output impedance = 15 Ohms. Keep in mind that the setup isn't shown, it's made by the manufacturer of the amp who also sells the op-amps and it's on YT (compression etc. Also high pass and low pass would sum flat only if subwoofer and main speakers are time aligned, or phase is also adjustable. XLR Input / 12V Trigger in. jmwant. i received everything on 5 feb; ran them for a few days, and i was delighted w/what i heard. Messages. It supports XLR balanced input, offering strong interference resistance and effective noise reduction capabilities. audiophonics. Please confirm which channel‘s op-amp needs replacement； 2. If the sound quality ramps with the price paid for the op amps then there are some Sep 6, 2023 · I've been designing with op-amps my whole career. Jan 1, 2024 · It will probably come down to how safe and quiet Fosi Audio can make a higher current power supply. 32dB in stereo setting and 31. Sep 6, 2023 · Using opamps to directly drive loads they aren't designed for (C'Moy amps driving low impedance headphones) will indeed easily lead to audible (and extremely measurable) differences. Fosi Audio ZA3 Balanced Stereo Amplifier Home Audio 2CH Mono Amp with TPA3255 Chip. Kickstarter puts the Stereo 4 Ohm Output as 180w X2 @1%, and the Mono as 240 X1. 26dB in mono setting. doug s. The mini amp is a Fosi BL20C. I'm running 2 ZA3s in mono mode and would like to swap out the op amps. The amplifier delivers about 8dB less power into the load compared to if it had zero output impedance. Feb 10, 2024 · This is a review and detailed measurements of the Fosi Audio ZA3 stereo amplifier with balanced XLR inputs. Dec 11, 2023 · Summary . Question to @Fosi Audio , will you share specs/tolerances for suitable replacement op amps? Assuming there are alternatives that offer pure sonic differences. Even it it’s out of the box configuration, with the stock op amps and the sub and left Chanel op amp chips still in place, the sound is truly remarkable, even my fiancée noticed. I particularly like a wide and tall, detailed soundstage. 284. It may be fun and inexpensive, but: 1. It's dynamic, fast and tight, but also has the most wonderful Jan 23, 2024 · 3. Nov 15, 2023 · AUDIO: Denon x3800h 7. #23. Overall, the amp looks aesthetically Oct 10, 2023 · Fosi Audio ZA3 Balanced Dual-Mode Class-D Amplifier. Audio Video: MiniDSP Flex HT, Boxem Arthur 3409, Fosi ZA3, Focal Kanta no2 Apr 29, 2024 · Unlike previous Fosi Audio Amplifiers that included ‘monoblock’ options like the Fosi Audio ZA3 (and the similar Aiyima A07 MAX) the V3 Mono is a pure monoblock, power amplifier. while this refers to the FOSI ZA3 audio amplifier, with integrated TPA3255 high-end Class-D amp. My house system is doing that well. Feb 10, 2024 · The Fosi builds volume quickly when connected to my CD player's line level outputs. Dec 20, 2023 · Everything I mentioned previously about the woofer imaging is even more so with the ZA3 on the tweeters. Nov 22, 2023 · A capable, punchy-sounding music streamer that’s packed with features and has a terrific interface that’s delightful to use. I upgraded my BT20a Pro with a GaN 48V 5A power supply and 2 SS3602 chips. Phase 1: Stereo setup with subwoofer. July 30, 2021. Trying to get Streaming and CD player to the ZA3's with remote volume control. #51. Just today Fosi announced the ZA3 Balanced Dual-Mode Class-D Amplifier. The FA3, driving a pair of JBL 2225 15" woofers sounds somewhat "boomy Dec 22, 2023 · The WiiM Pro and WiiM Pro Plus audiio streamers have a 12 volt trigger output that can power up a Topping PA5 II Plus. I'm using the optical output of the Wiim. Bluetooth device connectivity (included external antenna with 50ft range). If those features are useful Jan 7, 2024 · Mar 22, 2024. If I rolled the op-amps on the amp itself is there a need to look at modifying the preamp and dac or would rolling the op-amps in the bt20a Oct 10, 2023 · The thing that will bring Fosi to the next level will be filtering, allowing flat and load-independent frequency response. Op Amp Rolling in the Aune X8 Magic DAC. Good Day All, I'm about to receive my ZA3 (1 unit) to drive the Wharfedale Diamond 12. 99 USD. Qualio IQ speakers (YT video) use the Mundorf AMT17D2. At this point result is just astonishing, sound is so high quality, so real, giving me goosebumps. This is a review and detailed measurements of the Fosi Audio ZA3 stereo amplifier with balanced XLR inputs. 99 with stock 32 volt supply. Dec 28, 2023 · Source is 2 fold - Marantz TT15 turntable with Parks Puffin phono pre, and Roon streamer (Rpi to SMSL D6 DAC) so I need an amp with 2 inputs. With a cross over imbedded in the DAC, or the sub out in the amp, you can alleviate the stress the lower frequencies place on both the amp and the main speakers. Op-Amp Rolling: SS3602, MUSES02, OPA2134PA. SMSL-D6-S then feeds ZA3 via short XLR cables. The sequence of Sam “Ace” Rothstein’s car explodes is impactful, a lot to do with the Subs, but the use of J. In this case 200 x 4 = sqrt (800) = 28. Op-amp swapping carries over from the V3 to the Fosi Audio ZA3. I doubt you'll make an actual Aug 19, 2023 · As far as op amps, it's somewhat controversial, with some advocates of 'op amp rolling' treating it like tube rolling. Contents include the ZA3 amplifier itself, a robust 48V 5A power supply unit (PSU) similar to the one that comes with the V3, and a comprehensive manual detailing connectivity options. My 2. Dec 18, 2023 · What is in the Box, internals and overall Build Quality The ZA3 arrives in a larger package compared to other Fosi amplifiers. If it's in good shape then $150 seems like a price I'd have a hard time turning down. That application (and high gain pre-amp circuits) is where the 'op-amp rolling' comes from. What is in the Box, internals and overall Build Quality. Dec 24, 2023 · It produces very good results even without a preamp being involved in the process. Oct 10, 2023 · FOSI AUDIO ZA3 Stereo / Mono Amplifier. audiosciencereview. Feb 10, 2024 · You can buy 2 for only a few dollars more than the za3. 11/. After the CheapAudioMan praised the Aiyima A07 MAX as being better than the Fosi V3 he hinted that Fosi has something new coming. #20. 10/ (10+15) = 0. I believe Fosi Audio are preparing a separate Pre-amp Feb 10, 2024 · Even if I think the a07 max (and the fosi v3) are even better bargains. Quantity. Connecting via BT will override the RCA input, to switch back to RCA either go on the connected device and disconnect/disable BT, or press the volume button in for about 5 seconds. The amplifier has really dressed up from its earlier origins of common enclosures in budget class amplifiers. fr. Engage in product development, share your thoughts, and see how your feedback contributes to real-time progress. It also allows dual op-amps rolling to tailor the audio experience. Probably due to the high input gain on the ZA3 that @amirm mentioned. Product variants: SparkoS SS3602+DIP SOCKET - $163. It incorporates two TI TPA3255 amplifier chips enabling it to deliver up to 2x150W or 1x240W @ 4Ω. 1. They included the specs of the four present on the board and ensured Dec 20, 2023 · One Muses02 sells for £24. The benefit is primarily more power due to one PSU per channel and the separation of channels between the two. Feb 10, 2024 · Feb 18, 2024. I own a Fosi V3 with 48V/5A power supply and it is a wonderful amplifier, but it's got one input and no remote control. Whether you prefer the nuanced clarity of a Sparkos SS3602 or the warmth of an OPA2134PA, the power to refine your sound is in your hands. Feb 10, 2024 · Likes. Last edited by a moderator: Nov 27, 2023. 1,410. Edit: Audiosource is $45 vs Fosi @ $150. It should be easy to pair Jan 25, 2024 · review. This works really well and sounds great, however, the mains are playing at full range, as is the Buckeye amp driving them. But I think the hiss comes at that end of the chain with the Fosi amp. Phase 2. I don't know if they ship to Canada, however. Apr 19, 2024 · Elevate your audio experience with the Fosi Audio ZA3 Balanced Stereo Amplifier. Or you could use the speaker level inputs so from Both ZA3's into the sub and then to your speakers. So jumpy-up 8 pin Op Amps for "rolling". So, it requires a pre-amp for Volume control, and you need 2 x V3 Mono’s for stereo, one for each speaker. It’s powering 2x Sony SSF-7000 tower speakers directly. The Class A/B RA150 sound very crisp and have a damping factor of 200. Sep 6, 2023 · The performance doesn't come from the op amp on it's own, but together with the surrounding circuitry which has been specifically designed to match the characteristics of the selected op amp. This is a review and detailed measurements of the Fosi Audio V3 stereo amplifier. Jun 20, 2023. Ideally you would run the sub of a pre-amp. Not earth shattering. So if anyone is interested in running dual monoblocks this is your best bet. 99 with the 48 volt supply. Add more channels for surround, subwoofer from phase 1, and amp from phase 1 to power surround/other channels. I believe Fosi Audio are preparing a separate Pre-amp Here's a 50W x 2 (8 ohm) amplifier with 12V trigger in/out for $100 (open box) or $150 (new). (It doesn't matter if people say there is no point, I would still do it). Oct 10, 2023 · Here are the reasons to choose this one over other fosi and aiyima amps: - mono mode. In this review, we will get into the details of the new Fosi Audio ZA3 Amplifier - the latest TPA3255 amplifier Fosi Audio. Feb 10, 2024 · The RCA out goes to a 12" sub with the cross over set at 65Hz. Or even better, a MiniDSP 2x4 hd or Minidsp flex — reference quality and includes powerful DSP/bass Oct 10, 2023 · A note. The Modi 3 audio quality is as good as my $1000 RME interface , just without all the bells and whistles. My ultimate goal will be to horizontally bi-amp my top speakers with four (4) mono amps which their own power supplies, and use my ZA3 to power my Mar 11, 2024 · MODDING AND HOT-RODDING. This small Fosi Audio ZA3 integrated amplifier has the particularity of being able to operate in both stereo and mono mode. The Fosi with the stock 32v PSU is doing the same output as the Audiosource. But both the PC and Wiim have separate level output controls so they not. Music: Bluesound Node 2i, MiniDSP Flex HT, Boxem Arthur 3409, Focal Kanta no2, dual SVS SB1000 pro. 99 with 48 volt power supply. TedBaker said: I have the volume at about 60% on the Wiim / PC. A Focusrite 2i2 or Schitt Modi 3 can be had for $60 or less. Oct 10, 2023 · In home use, with short cables connecting source to amp, there will almost never be an audible noise benefit from balanced inputs. . robgnyc said: Curious if a preamp or changing OP Amps has more impact on the overall sound. Hello, I post what I find to be valuable HiFi YouTube videos on the Reddit platform, generally YouTube videos are not allowed within many of the audio subreddits so this is a space to provide a home for Video content without the pushback The Fosi Audio ZA3 has a clean and modern design with a rectangular and short form factor. That switch on the right, potentially very harmful. Feb 10, 2024 · I just ran some tests on two different ZA3's (my broken one with the broken right RCA in, and the replacement one) and with 1v in at 1Khz test tone, I get 29. For the quality of amp that the Z3 and ZA3 their features and form factor make no sens at all. The product comes in a black and completely metallic case, with a veryminimal control panel, which includes: Volume knob with integrated pressure ON/OFF system. I have the 48v power supply. I recommend you start the video and change your browser tab to something else while listening. The main shell has curved edges and lateral vent grids with an orange accent beneath them. - XLR. The ZA3 is a meticulously crafted high-performance balanced power amplifier designed with users' needs deep in mind. 32. Feb 10, 2024 · Yes the V3 is cheaper. 99 with a 48v power supply. Power Adapter x1. By DIY audio and Art of Sound forums. i also bought four akliam lc2 discrete class-a op amps; cost was $60 shipped. Fine-tune your sound with op-amp rolling for a personalized audio journey. rhing, Jan 14, 2024. Removing four 2mm hex screws (two on the back panel, two underneath), prying off the volume knob with a plastic cooking spatula, and loosening the 10mm nut gives you access to the internals, which construction shows are miles and miles better than a Dayton Audio DTA-100a I have from over a decade ago. cost was <$170 shipped. User Manual x1. 95. The High Quality Operational Amplifier Chip SparkoS Labs SS3602 , MUSES02 and OPA2134PA can replace the ZA3 , BT20A PRO, and V3's operational amplifiers and can create different sound quality, providing you with a Feb 10, 2024 · I just added a pair of the ZA3 to drive the woofers of my LaScala-derived, custom speakers. Dec 20, 2023 · We're happy to share with ASR members that our first dual-mode balanced amplifier ZA3 is about to be released! Here are some details about this amp. www. System 1 (house) = CD player in to SMSL D6-S via RCA Coax AND Wiim Mini connected to SMSL D6-S via Optical Cable (Toslink). Just wondering what the opinions on these are before I hop into it. You could use one of the ZA 3's sub outs of course but then you will miss a channel (low frequency is usually on both channels so it shouldn't matter much). On the lookout for some decent amps, I ran into the Fosi brand on amazon that seemed to get rave reviews. If you are just dipping your toe into the hobby or like to be able to ‘see what’s inside’ and fancy a bit of DIY upgrading, then this is the unit for you. Dec 31, 2023. I put the ZA3 back in my system, and I am really impressed what this amp delivers. The only note I can think of is that the Fosi V3 seemed to have a touch more in the high end, perhaps it is load dependency. I have a phono preamp connecting my turntable and a aiyima dac connected to a pi streamer both connected into a Fosi BT20a pro amp. Features. Can I just change the right sides (R-OPAMP socket) on each ZA3 or do I need to change both left and right on each ZA3? Nov 15, 2023 · well, since i last posted, i ended up buying two aiyima a07 max amps w/the 48v/5a power supplies. so, i opened them up to install the op amps. Topping and SMSL would be at the top of Chi Fi, with Fosi and FX Aug 19, 2023 · I've owned several other Class D chip amps in the past, including the Aiyima A07, SMSL AO200 and at least a couple different TPA3116 Topping and SMSL models. 48V Fosi Audio ZA3 Amp (just one) £150. The TPA3255 which is a heart of this amplifier is my favorite D-class Amp chip. The uppgrade to lm4562 is a no-brainer if youre interested in hifi, and clearly worth 5 dollars . Fosi Audio ZA3 Power Amplifier x1. Add to Cart. Toni Mas said: I don't agree, because in order to get a flatter in room response, some fine tuned mismatch between high pass and low pass is much better. Not planning on rolling any of the internal op-amps, would love to get 2 48v 10amp GaN to get more watts out of these amps. The best bet is to pick up a used audio interface on ebay or reverb. From dual-mode versatility to audiophile-grade components, this amplifier offers rich connectivity, advanced heat dissipation, and enhanced scalability. Sep 6, 2023 · I'm pretty sure I listened while watching the description of each op-amp so I'm certain my experience is flawed. Feb 11, 2024. Feb 7, 2024 · It'll be used for a mix of music and video (no vinyl and no CDs). 4 = -7. So, it takes 28. Archived post. New comments cannot be posted and votes cannot be cast. "Fosi is a great little amp that can put many multiple thousand $$$ to real shame. 5dB. Jan 9, 2024 · Another SHF member reached out via another forum we belong to about my set up, shared 1 amp per speaker leveraging to appropriate pre-amp outputs to support what I am doing. Share. Dual-mode functionality for flexible stereo and mono operation Oct 2, 2021 · In the case of my two Aiyima a04 and switching between ne5532 amp to lm4562 amplifier, the difference soundwise is clearly bigger than moving your head 30 cm in the listening room. In like new condition barely used. which can be used in mono mode paired with another, or in classic stereo mode. MacBook Pro -> Topping DM7 8-Channel DAC Balanced -> Hypex NC252MP (Buckey AMP) Kef R11 with 2xSubs. That's where the value prospect meets the objective performance sweet spot. Already bought a pair of regular speaker cables/wires but then I came across the topic of biwiring/bi-wiring. Since the Fosi BL20C does have a RCA LFE out I went ahead and borrowed a powered 12” Klipsch R-SW12 from my main home theatre system. Feb 18, 2024 · All of the amps sounded flat out excellent with these speakers. Wednesday at 2:07 AM. So, two ZA3 in Mono will output less than 2dB higher volume than one ZA3/V3 in stereo. My first thought was that they sounded "wet" compared to the Alesis RA150 bridged mono amps that they replaced. Following the same procedure, at 10k the power delivery is -4. Eversolo DMP-A6 : Read more. Feb 10, 2024 · This is a review and detailed measurements of the Fosi Audio ZA3 stereo amplifier with balanced XLR inputs. sparkoslabs. 0 system now goes from a USB (via computer)/coax source--->DAC--->ZA3--->JBL L100t3/L80t3/L20t3 speakers. #243. Overall sound and bass quality is quite good. I have a Sonos port connected to an old home theatre integrated receiver powering two passive speakers, but it’s annoying having to turn it on every…. The tone and timbre are good with the Fosi, but the other amps are better. On the PCBA board, there are marked positions for the left and right channel op-amps. So for $40 more with the ZA3 you get balanced inputs, a sub out, quasi-mono mode, a more attractive case with better cooling, and a 12v trigger in. Jul 30, 2021 · As per moderator, here is full article from the site: Objective Guide to Op-Amp Rolling - Part 1. The Topping PA5 II and the Fosi Audio ZA3 have 12 volt trigger inputs. ) Dec 11, 2023 · ZA3 Review. 87 on Profusion's website who is listed as an on-line distributor on the manufacturer's website. Shipping calculated at checkout. Overview and Disassembly : r/HiFiEmporium. Dec 20, 2023 · Jan 28, 2024. Here's the proposed setup: WiiM Pro Plus Streamer £219. With a cross over imbedded in the DAC, or the sub out in the amp, you can alleviate the stress the lower frequencies place on both the amp and the main speakers Apr 1, 2024 · The only way to eliminate or mitigate that problem was to turn down the volume at the amplifier, an option that is there with an integrated amp or a power amp with variable gain (like the GCC-100 I was using before) or volume attenuator (like the Fosi ZA3), but setting gain/volume down and using a much higher volume range/setting at the DAC Feb 10, 2024 · Mar 13, 2024. I'm going to run two za3 amps in mono, I'd like to use the XLR in on the amps from the Geshelli J2S XLR outs. Feb 10, 2024 · All seems better, with the same tonality, but all better (precision, space, reality). ‘L-OPAMP’ indicates the left channel, while ‘R-OPAMP’ indicates the right channel. Location. Steps for replacing the op-amps: 1. FOSI ZA3 Stereo/Mono Amp - First Look! Overview and Disassembly. We know that the Fosi and other cheap class D do not have the PFFB implemented for now, so the impedance graph of the speakers must be taken into account > 10 kHz in case it triggers at >> 4 Ohms. Doing that with someone else's design is even more fraught, especially with high-speed op-amps. A quick search will reveal LOTS of threads on forums with posters talking about changing op amps in their gear and opining about the subjective qualities gained or lost doing so, especially in headphone amps. Q Acoustics 3030i Speakers (on their stands) £249 (+£165) That's £793 sans cabling. Op-Amp Test Board. Discrete Op Amps Review. From what I gather the XLR opamp performs a different Feb 10, 2024 · When using this cheap amp with RCA and without using the sub you only add $ 160 to the initial purchase price ($150) effectively doubling its price and you get the exact same performance but of course the owner knows he used the best opamps not realizing the class-D amp determines the sound. It is not really about sound quality but about features. •Mode: Stereo, Mono •Input: RCA, XLR •Output: Speaker Out, Sub Out •Amp Chip: Texas Instrument TPA3255 •SINAD: 88dB •SNR: ≥106dB www. There is a $10 discount coupon right now. - then I changed the original opamp with the SS3602 (around 200€ for 2). Apr 8, 2024 · First up, the 4K Blu-Ray of the 1995 Scorsese classic “Casino”. I changed the op amps in my ZA3 to some low cost ones, but an upgrade still, and it made a positive difference in sound quality. I enjoy the A300 sound quality, although I admit the specs in Amirs review here show it to be on the low end, even for budget class D amps. And advise which V3 op amps to roll, as Jan 26, 2024 · The BT20A Pro added the iconic copper coloured volume knob and Fosi realized that customers were very interested in Op-Amps. Fosi ZA3 op amp upgrade. I have a pair of Sparkos SS3602. Dec 11, 2023 · This small, compact and powerful Fosi Audio ZA3 integrated amplifier has the particularity of being able to operate in both stereo and mono mode. Mac mini --> Dirac Live --> Peachtree Audio 'Carina' integrated amplifier --> Polk ES60. 2 Dipole AMT Tweeter. When changing the opamps in the za3, I can ignore the two sub opamps and the left opamp (some advocate for their removal entirely) and change only the RIGHT opamp in each amp. A 300 euro preamp with a streamer could be interesting 600 euros for all 3 things (with a little discount 600 or even 499) Fosi audio BT20A,Denon DCD-700ae,Denon DR-M33,Argon Audio TT (turntable),Speakers Triangle esprit titus ez, cordial cls 260 spaker cable ,inakustik, qed,DH LABS . It was sent to me by the company and costs US $89. Apr 1, 2024 · Fosi ZA3 + Sparkos Op-amp - The real deal - Don't miss out !!! Interested in Sparkos Opamps - visit www. OP. Product highlights. Jimi Floyd said: I can't understand the filtered sub out. 139 reviews. com. g. More questions should be directed to a sub forum on the page having to do with diy and or diyaudio. Its price, a grounding £149. 99, is welcomed in an inflation era where the sky doesn’t seem the limit. Jun 20, 2023 · 242,226. Its ability to run cool, coupled with its mono block support and balanced input options, positions it as a competitive option in the audiophile market. It was sent to me by the company and costs US $149. Apr 24, 2024 · Unlike previous Fosi Audio Amplifiers that included ‘monoblock’ options like the Fosi Audio ZA3 (and the similar Aiyima A07 MAX) the V3 Mono is a pure monoblock, power amplifier. It’s $109. It's harmless and allows use of a passive sub driven by a separate amp that doesn't have its own low-pass filter -- e. Jan 23, 2024. Massimo. I like tinkering with things and op-amp rolling seems like a fun project. Many of the posts I see in forums about Aiyima and Fosi chip amps include negative comments about the load dependence. 96 dB. kh aw sw ky gs qp ea hk ng or